/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 18:06:46,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 18:06:46,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 18:06:46,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 18:06:46,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-01 18:06:46,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-01 18:06:46,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-01 18:06:46,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-01 18:06:46,277 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 18:06:46,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 18:06:46,278 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 18:06:46,278 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 18:06:46,278 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 18:06:46,279 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 18:06:46,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 18:06:46,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 18:06:46,283 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 18:06:46,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 18:06:46,284 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 18:06:46,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 18:06:46,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 18:06:46,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 18:06:46,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 18:06:46,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 18:06:46,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 18:06:46,285 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 18:06:46,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 18:06:46,285 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 18:06:46,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 18:06:46,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 18:06:46,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 18:06:46,285 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 18:06:46,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 18:06:46,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:06:46,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 18:06:46,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 18:06:46,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 18:06:46,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 18:06:46,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 18:06:46,287 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 18:06:46,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 18:06:46,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 18:06:46,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 18:06:46,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 18:06:46,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 18:06:46,493 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 18:06:46,495 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 18:06:46,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-array-sum.wvr.bpl [2022-03-01 18:06:46,496 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-array-sum.wvr.bpl' [2022-03-01 18:06:46,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 18:06:46,520 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 18:06:46,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 18:06:46,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 18:06:46,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 18:06:46,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:06:46" (1/1) ... [2022-03-01 18:06:46,536 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:06:46" (1/1) ... [2022-03-01 18:06:46,540 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 18:06:46,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 18:06:46,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 18:06:46,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 18:06:46,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 18:06:46,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:06:46" (1/1) ... [2022-03-01 18:06:46,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:06:46" (1/1) ... [2022-03-01 18:06:46,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:06:46" (1/1) ... [2022-03-01 18:06:46,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:06:46" (1/1) ... [2022-03-01 18:06:46,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:06:46" (1/1) ... [2022-03-01 18:06:46,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:06:46" (1/1) ... [2022-03-01 18:06:46,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:06:46" (1/1) ... [2022-03-01 18:06:46,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 18:06:46,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 18:06:46,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 18:06:46,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 18:06:46,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:06:46" (1/1) ... [2022-03-01 18:06:46,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:06:46,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:46,578 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-01 18:06:46,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-01 18:06:46,618 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 18:06:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 18:06:46,618 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 18:06:46,618 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 18:06:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 18:06:46,618 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 18:06:46,619 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 18:06:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 18:06:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 18:06:46,619 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 18:06:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 18:06:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 18:06:46,620 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 18:06:46,652 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 18:06:46,653 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 18:06:46,733 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 18:06:46,745 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 18:06:46,745 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 18:06:46,747 INFO L202 PluginConnector]: Adding new model simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:06:46 BoogieIcfgContainer [2022-03-01 18:06:46,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 18:06:46,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 18:06:46,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 18:06:46,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 18:06:46,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:06:46" (1/2) ... [2022-03-01 18:06:46,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc8bad and model type simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 06:06:46, skipping insertion in model container [2022-03-01 18:06:46,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:06:46" (2/2) ... [2022-03-01 18:06:46,766 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-array-sum.wvr.bpl [2022-03-01 18:06:46,769 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 18:06:46,769 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 18:06:46,769 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 18:06:46,769 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 18:06:46,795 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-01 18:06:46,836 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 18:06:46,852 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 18:06:46,853 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-01 18:06:46,860 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 29 transitions, 82 flow [2022-03-01 18:06:46,905 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:46,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 18:06:46,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:46,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:06:46,924 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:46,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:46,933 INFO L85 PathProgramCache]: Analyzing trace with hash 437584313, now seen corresponding path program 1 times [2022-03-01 18:06:46,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:46,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323422404] [2022-03-01 18:06:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:46,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:47,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:47,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323422404] [2022-03-01 18:06:47,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323422404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:06:47,186 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:06:47,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:06:47,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544595868] [2022-03-01 18:06:47,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:06:47,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:06:47,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:47,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:06:47,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:06:47,213 INFO L87 Difference]: Start difference. First operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:47,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:47,339 INFO L93 Difference]: Finished difference Result 257 states and 781 transitions. [2022-03-01 18:06:47,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:06:47,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 18:06:47,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:47,386 INFO L225 Difference]: With dead ends: 257 [2022-03-01 18:06:47,386 INFO L226 Difference]: Without dead ends: 230 [2022-03-01 18:06:47,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:06:47,391 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:47,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 35 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:06:47,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-01 18:06:47,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2022-03-01 18:06:47,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.0802139037433154) internal successors, (576), 187 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:47,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 576 transitions. [2022-03-01 18:06:47,436 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 576 transitions. Word has length 16 [2022-03-01 18:06:47,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:47,437 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 576 transitions. [2022-03-01 18:06:47,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:47,437 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 576 transitions. [2022-03-01 18:06:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:06:47,438 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:47,442 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:06:47,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 18:06:47,443 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:47,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:47,443 INFO L85 PathProgramCache]: Analyzing trace with hash -760695079, now seen corresponding path program 1 times [2022-03-01 18:06:47,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:47,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034010876] [2022-03-01 18:06:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:47,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:47,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:47,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034010876] [2022-03-01 18:06:47,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034010876] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:47,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164859012] [2022-03-01 18:06:47,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:47,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:47,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:47,512 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:47,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 18:06:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:47,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-01 18:06:47,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:47,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:47,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164859012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:47,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:47,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-03-01 18:06:47,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119136984] [2022-03-01 18:06:47,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:47,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:06:47,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:47,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:06:47,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:06:47,708 INFO L87 Difference]: Start difference. First operand 188 states and 576 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:47,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:47,793 INFO L93 Difference]: Finished difference Result 376 states and 1113 transitions. [2022-03-01 18:06:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:06:47,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:06:47,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:47,798 INFO L225 Difference]: With dead ends: 376 [2022-03-01 18:06:47,798 INFO L226 Difference]: Without dead ends: 376 [2022-03-01 18:06:47,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:06:47,801 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:47,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 36 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:06:47,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-03-01 18:06:47,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 181. [2022-03-01 18:06:47,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 3.077777777777778) internal successors, (554), 180 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:47,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 554 transitions. [2022-03-01 18:06:47,823 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 554 transitions. Word has length 18 [2022-03-01 18:06:47,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:47,823 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 554 transitions. [2022-03-01 18:06:47,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:47,823 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 554 transitions. [2022-03-01 18:06:47,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:06:47,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:47,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:06:47,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:48,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:48,041 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:48,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:48,041 INFO L85 PathProgramCache]: Analyzing trace with hash 663812563, now seen corresponding path program 2 times [2022-03-01 18:06:48,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:48,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7242119] [2022-03-01 18:06:48,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:48,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:48,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:48,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7242119] [2022-03-01 18:06:48,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7242119] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:06:48,064 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:06:48,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:06:48,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313263442] [2022-03-01 18:06:48,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:06:48,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:06:48,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:48,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:06:48,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:06:48,065 INFO L87 Difference]: Start difference. First operand 181 states and 554 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:48,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:48,111 INFO L93 Difference]: Finished difference Result 221 states and 644 transitions. [2022-03-01 18:06:48,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:06:48,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:06:48,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:48,112 INFO L225 Difference]: With dead ends: 221 [2022-03-01 18:06:48,112 INFO L226 Difference]: Without dead ends: 190 [2022-03-01 18:06:48,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:06:48,113 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:48,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 21 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:06:48,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-01 18:06:48,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 169. [2022-03-01 18:06:48,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.0297619047619047) internal successors, (509), 168 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:48,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 509 transitions. [2022-03-01 18:06:48,124 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 509 transitions. Word has length 18 [2022-03-01 18:06:48,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:48,124 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 509 transitions. [2022-03-01 18:06:48,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:48,124 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 509 transitions. [2022-03-01 18:06:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 18:06:48,129 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:48,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:06:48,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 18:06:48,130 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:48,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:48,135 INFO L85 PathProgramCache]: Analyzing trace with hash 132805511, now seen corresponding path program 1 times [2022-03-01 18:06:48,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:48,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75115048] [2022-03-01 18:06:48,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:48,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:48,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:48,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75115048] [2022-03-01 18:06:48,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75115048] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:06:48,162 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:06:48,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-01 18:06:48,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082474738] [2022-03-01 18:06:48,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:06:48,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:06:48,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:48,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:06:48,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:06:48,163 INFO L87 Difference]: Start difference. First operand 169 states and 509 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:48,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:48,183 INFO L93 Difference]: Finished difference Result 239 states and 717 transitions. [2022-03-01 18:06:48,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:06:48,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 18:06:48,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:48,185 INFO L225 Difference]: With dead ends: 239 [2022-03-01 18:06:48,185 INFO L226 Difference]: Without dead ends: 203 [2022-03-01 18:06:48,185 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 [2022-03-01 18:06:48,186 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:48,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 22 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:06:48,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-01 18:06:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-03-01 18:06:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.0247524752475248) internal successors, (611), 202 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 611 transitions. [2022-03-01 18:06:48,192 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 611 transitions. Word has length 19 [2022-03-01 18:06:48,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:48,192 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 611 transitions. [2022-03-01 18:06:48,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:48,192 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 611 transitions. [2022-03-01 18:06:48,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:06:48,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:48,193 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] [2022-03-01 18:06:48,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-01 18:06:48,193 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:48,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:48,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1705332901, now seen corresponding path program 1 times [2022-03-01 18:06:48,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:48,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226469816] [2022-03-01 18:06:48,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:48,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:48,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:48,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226469816] [2022-03-01 18:06:48,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226469816] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:48,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959380656] [2022-03-01 18:06:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:48,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:48,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:48,237 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:48,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 18:06:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:48,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-01 18:06:48,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:48,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:48,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959380656] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:48,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:48,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-03-01 18:06:48,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030061348] [2022-03-01 18:06:48,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:48,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:06:48,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:48,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:06:48,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:06:48,353 INFO L87 Difference]: Start difference. First operand 203 states and 611 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:48,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:48,422 INFO L93 Difference]: Finished difference Result 263 states and 798 transitions. [2022-03-01 18:06:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:06:48,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 18:06:48,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:48,425 INFO L225 Difference]: With dead ends: 263 [2022-03-01 18:06:48,425 INFO L226 Difference]: Without dead ends: 263 [2022-03-01 18:06:48,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:06:48,430 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:48,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 30 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:06:48,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-01 18:06:48,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 215. [2022-03-01 18:06:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:48,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2022-03-01 18:06:48,443 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 21 [2022-03-01 18:06:48,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:48,444 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2022-03-01 18:06:48,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:48,444 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2022-03-01 18:06:48,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 18:06:48,445 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:48,445 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] [2022-03-01 18:06:48,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:48,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:48,661 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:48,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:48,662 INFO L85 PathProgramCache]: Analyzing trace with hash 946505877, now seen corresponding path program 1 times [2022-03-01 18:06:48,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:48,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798101811] [2022-03-01 18:06:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:48,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:48,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:48,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798101811] [2022-03-01 18:06:48,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798101811] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:48,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135356266] [2022-03-01 18:06:48,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:48,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:48,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:48,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:48,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 18:06:48,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:48,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:06:48,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:49,083 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-03-01 18:06:49,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2022-03-01 18:06:49,120 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 [2022-03-01 18:06:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:49,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:49,218 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 29 treesize of output 27 [2022-03-01 18:06:49,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:06:49,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:06:49,289 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 18 [2022-03-01 18:06:49,303 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-03-01 18:06:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:49,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135356266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:49,377 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:49,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-01 18:06:49,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442589128] [2022-03-01 18:06:49,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:49,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:06:49,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:49,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:06:49,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:06:49,378 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:49,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:49,596 INFO L93 Difference]: Finished difference Result 425 states and 1255 transitions. [2022-03-01 18:06:49,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:06:49,596 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 18:06:49,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:49,598 INFO L225 Difference]: With dead ends: 425 [2022-03-01 18:06:49,598 INFO L226 Difference]: Without dead ends: 398 [2022-03-01 18:06:49,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:06:49,598 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:49,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 92 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:06:49,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-03-01 18:06:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 294. [2022-03-01 18:06:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9829351535836177) internal successors, (874), 293 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:49,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 874 transitions. [2022-03-01 18:06:49,605 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 874 transitions. Word has length 23 [2022-03-01 18:06:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:49,606 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 874 transitions. [2022-03-01 18:06:49,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:49,606 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 874 transitions. [2022-03-01 18:06:49,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 18:06:49,606 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:49,607 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] [2022-03-01 18:06:49,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-01 18:06:49,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:49,807 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:49,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:49,808 INFO L85 PathProgramCache]: Analyzing trace with hash 615894917, now seen corresponding path program 2 times [2022-03-01 18:06:49,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:49,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145622617] [2022-03-01 18:06:49,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:49,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:49,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:49,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145622617] [2022-03-01 18:06:49,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145622617] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:49,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926041465] [2022-03-01 18:06:49,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:06:49,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:49,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:49,912 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:49,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 18:06:49,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:06:49,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:49,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:06:49,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:50,098 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 18 treesize of output 14 [2022-03-01 18:06:50,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2022-03-01 18:06:50,131 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 17 treesize of output 13 [2022-03-01 18:06:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:50,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:50,291 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 29 treesize of output 27 [2022-03-01 18:06:50,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:06:50,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:06:50,356 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 18 [2022-03-01 18:06:50,367 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-01 18:06:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:50,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926041465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:50,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:50,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-01 18:06:50,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779316163] [2022-03-01 18:06:50,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:50,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:06:50,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:50,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:06:50,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:06:50,443 INFO L87 Difference]: Start difference. First operand 294 states and 874 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:51,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:51,174 INFO L93 Difference]: Finished difference Result 820 states and 2540 transitions. [2022-03-01 18:06:51,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 18:06:51,174 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 18:06:51,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:51,177 INFO L225 Difference]: With dead ends: 820 [2022-03-01 18:06:51,178 INFO L226 Difference]: Without dead ends: 793 [2022-03-01 18:06:51,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:06:51,178 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 224 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:51,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 135 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:06:51,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-03-01 18:06:51,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 314. [2022-03-01 18:06:51,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.073482428115016) internal successors, (962), 313 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:51,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 962 transitions. [2022-03-01 18:06:51,187 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 962 transitions. Word has length 23 [2022-03-01 18:06:51,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:51,187 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 962 transitions. [2022-03-01 18:06:51,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:51,188 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 962 transitions. [2022-03-01 18:06:51,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 18:06:51,188 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:51,188 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] [2022-03-01 18:06:51,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-01 18:06:51,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:51,422 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:51,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:51,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1351743519, now seen corresponding path program 3 times [2022-03-01 18:06:51,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:51,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862597696] [2022-03-01 18:06:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:51,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:51,584 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:51,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862597696] [2022-03-01 18:06:51,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862597696] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:51,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998703493] [2022-03-01 18:06:51,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:06:51,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:51,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:51,585 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:51,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 18:06:51,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:06:51,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:51,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:06:51,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:51,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-03-01 18:06:51,743 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 19 treesize of output 15 [2022-03-01 18:06:51,778 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 20 treesize of output 16 [2022-03-01 18:06:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:51,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:51,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:06:51,982 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 20 treesize of output 25 [2022-03-01 18:06:51,985 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 29 treesize of output 27 [2022-03-01 18:06:52,005 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-01 18:06:52,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:06:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:52,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998703493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:52,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:52,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-01 18:06:52,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020109182] [2022-03-01 18:06:52,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:52,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:06:52,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:52,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:06:52,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:06:52,109 INFO L87 Difference]: Start difference. First operand 314 states and 962 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:52,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:52,453 INFO L93 Difference]: Finished difference Result 582 states and 1803 transitions. [2022-03-01 18:06:52,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 18:06:52,453 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 18:06:52,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:52,456 INFO L225 Difference]: With dead ends: 582 [2022-03-01 18:06:52,456 INFO L226 Difference]: Without dead ends: 555 [2022-03-01 18:06:52,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:06:52,456 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:52,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 102 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:06:52,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-03-01 18:06:52,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 366. [2022-03-01 18:06:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:52,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2022-03-01 18:06:52,479 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2022-03-01 18:06:52,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:52,479 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2022-03-01 18:06:52,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:52,479 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2022-03-01 18:06:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 18:06:52,480 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:52,480 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] [2022-03-01 18:06:52,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:52,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:52,697 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:52,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:52,697 INFO L85 PathProgramCache]: Analyzing trace with hash -68708093, now seen corresponding path program 4 times [2022-03-01 18:06:52,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:52,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605172317] [2022-03-01 18:06:52,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:52,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:52,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:52,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605172317] [2022-03-01 18:06:52,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605172317] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:52,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436054761] [2022-03-01 18:06:52,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:06:52,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:52,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:52,807 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:52,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 18:06:52,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:06:52,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:52,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:06:52,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:52,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-03-01 18:06:52,954 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 17 treesize of output 13 [2022-03-01 18:06:52,974 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 [2022-03-01 18:06:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:53,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:53,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:06:53,137 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 20 treesize of output 25 [2022-03-01 18:06:53,140 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 29 treesize of output 27 [2022-03-01 18:06:53,164 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-01 18:06:53,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:06:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:53,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436054761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:53,279 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:53,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-01 18:06:53,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638888161] [2022-03-01 18:06:53,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:53,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:06:53,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:53,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:06:53,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:06:53,280 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:53,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:53,999 INFO L93 Difference]: Finished difference Result 1010 states and 3145 transitions. [2022-03-01 18:06:53,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:06:54,000 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 18:06:54,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:54,004 INFO L225 Difference]: With dead ends: 1010 [2022-03-01 18:06:54,004 INFO L226 Difference]: Without dead ends: 956 [2022-03-01 18:06:54,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:06:54,004 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 193 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:54,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 109 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:06:54,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-03-01 18:06:54,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 406. [2022-03-01 18:06:54,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.1703703703703705) internal successors, (1284), 405 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1284 transitions. [2022-03-01 18:06:54,016 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1284 transitions. Word has length 23 [2022-03-01 18:06:54,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:54,016 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1284 transitions. [2022-03-01 18:06:54,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:54,017 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1284 transitions. [2022-03-01 18:06:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 18:06:54,019 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:54,019 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:06:54,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:54,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:54,236 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:54,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash 784698867, now seen corresponding path program 5 times [2022-03-01 18:06:54,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:54,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068378945] [2022-03-01 18:06:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:54,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:54,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:54,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068378945] [2022-03-01 18:06:54,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068378945] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:54,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032073630] [2022-03-01 18:06:54,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:06:54,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:54,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:54,263 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:54,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 18:06:54,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:06:54,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:54,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:06:54,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:54,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:54,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032073630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:54,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:54,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 18:06:54,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281464855] [2022-03-01 18:06:54,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:54,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:06:54,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:54,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:06:54,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:06:54,383 INFO L87 Difference]: Start difference. First operand 406 states and 1284 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:54,497 INFO L93 Difference]: Finished difference Result 909 states and 2785 transitions. [2022-03-01 18:06:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:06:54,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-01 18:06:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:54,501 INFO L225 Difference]: With dead ends: 909 [2022-03-01 18:06:54,501 INFO L226 Difference]: Without dead ends: 909 [2022-03-01 18:06:54,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:06:54,502 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:54,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 69 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:06:54,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-03-01 18:06:54,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 460. [2022-03-01 18:06:54,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.252723311546841) internal successors, (1493), 459 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:54,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1493 transitions. [2022-03-01 18:06:54,514 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1493 transitions. Word has length 25 [2022-03-01 18:06:54,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:54,514 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1493 transitions. [2022-03-01 18:06:54,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:54,514 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1493 transitions. [2022-03-01 18:06:54,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 18:06:54,515 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:54,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:06:54,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:54,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:54,732 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:54,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:54,732 INFO L85 PathProgramCache]: Analyzing trace with hash -817798605, now seen corresponding path program 6 times [2022-03-01 18:06:54,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:54,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247235815] [2022-03-01 18:06:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:54,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:54,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:54,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247235815] [2022-03-01 18:06:54,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247235815] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:54,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288434585] [2022-03-01 18:06:54,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:06:54,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:54,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:54,763 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:54,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:06:54,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:54,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 18:06:54,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:06:54,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:06:54,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:06:54,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288434585] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:54,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:54,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-01 18:06:54,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287643423] [2022-03-01 18:06:54,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:54,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:06:54,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:54,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:06:54,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:06:54,890 INFO L87 Difference]: Start difference. First operand 460 states and 1493 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:55,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:55,787 INFO L93 Difference]: Finished difference Result 2206 states and 6830 transitions. [2022-03-01 18:06:55,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:06:55,788 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-01 18:06:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:55,796 INFO L225 Difference]: With dead ends: 2206 [2022-03-01 18:06:55,796 INFO L226 Difference]: Without dead ends: 2206 [2022-03-01 18:06:55,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=677, Invalid=2745, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 18:06:55,798 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 440 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:55,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 125 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:06:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2206 states. [2022-03-01 18:06:55,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2206 to 841. [2022-03-01 18:06:55,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.5) internal successors, (2940), 840 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:55,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2940 transitions. [2022-03-01 18:06:55,822 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2940 transitions. Word has length 25 [2022-03-01 18:06:55,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:55,822 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 2940 transitions. [2022-03-01 18:06:55,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2940 transitions. [2022-03-01 18:06:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 18:06:55,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:55,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:06:55,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:56,040 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,SelfDestructingSolverStorable10 [2022-03-01 18:06:56,040 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:56,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:56,040 INFO L85 PathProgramCache]: Analyzing trace with hash 136398371, now seen corresponding path program 7 times [2022-03-01 18:06:56,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:56,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927355053] [2022-03-01 18:06:56,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:56,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:56,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:56,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927355053] [2022-03-01 18:06:56,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927355053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:56,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251497206] [2022-03-01 18:06:56,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:06:56,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:56,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:56,077 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:56,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 18:06:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:56,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:06:56,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:56,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:56,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:56,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251497206] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:56,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:56,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-01 18:06:56,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447532065] [2022-03-01 18:06:56,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:56,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:06:56,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:56,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:06:56,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:06:56,182 INFO L87 Difference]: Start difference. First operand 841 states and 2940 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:56,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:56,265 INFO L93 Difference]: Finished difference Result 1241 states and 4180 transitions. [2022-03-01 18:06:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 18:06:56,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-01 18:06:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:56,270 INFO L225 Difference]: With dead ends: 1241 [2022-03-01 18:06:56,270 INFO L226 Difference]: Without dead ends: 1235 [2022-03-01 18:06:56,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:06:56,271 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:56,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 41 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:06:56,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2022-03-01 18:06:56,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 840. [2022-03-01 18:06:56,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.4803337306317044) internal successors, (2920), 839 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:56,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2920 transitions. [2022-03-01 18:06:56,289 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2920 transitions. Word has length 25 [2022-03-01 18:06:56,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:56,289 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 2920 transitions. [2022-03-01 18:06:56,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:56,290 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2920 transitions. [2022-03-01 18:06:56,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 18:06:56,291 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:56,291 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:06:56,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:56,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:56,508 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:56,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:56,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1382698947, now seen corresponding path program 8 times [2022-03-01 18:06:56,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:56,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477464546] [2022-03-01 18:06:56,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:56,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:56,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:56,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477464546] [2022-03-01 18:06:56,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477464546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:56,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833478339] [2022-03-01 18:06:56,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:06:56,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:56,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:56,576 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:56,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 18:06:56,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:06:56,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:56,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:06:56,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:06:56,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:06:56,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833478339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:56,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:56,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-01 18:06:56,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6836208] [2022-03-01 18:06:56,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:56,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:06:56,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:56,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:06:56,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:06:56,706 INFO L87 Difference]: Start difference. First operand 840 states and 2920 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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) [2022-03-01 18:06:57,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:57,073 INFO L93 Difference]: Finished difference Result 2629 states and 9167 transitions. [2022-03-01 18:06:57,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 18:06:57,074 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 25 [2022-03-01 18:06:57,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:57,086 INFO L225 Difference]: With dead ends: 2629 [2022-03-01 18:06:57,086 INFO L226 Difference]: Without dead ends: 2587 [2022-03-01 18:06:57,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:06:57,087 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 341 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:57,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 60 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:06:57,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2022-03-01 18:06:57,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1338. [2022-03-01 18:06:57,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.6738967838444276) internal successors, (4912), 1337 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:57,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4912 transitions. [2022-03-01 18:06:57,134 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4912 transitions. Word has length 25 [2022-03-01 18:06:57,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:57,134 INFO L470 AbstractCegarLoop]: Abstraction has 1338 states and 4912 transitions. [2022-03-01 18:06:57,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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) [2022-03-01 18:06:57,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4912 transitions. [2022-03-01 18:06:57,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:06:57,138 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:57,138 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:06:57,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:57,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-01 18:06:57,352 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:57,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:57,352 INFO L85 PathProgramCache]: Analyzing trace with hash 849469189, now seen corresponding path program 9 times [2022-03-01 18:06:57,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:57,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14439553] [2022-03-01 18:06:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:57,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:57,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:57,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14439553] [2022-03-01 18:06:57,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14439553] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:57,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684404840] [2022-03-01 18:06:57,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:06:57,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:57,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:57,393 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:57,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 18:06:57,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:06:57,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:57,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:06:57,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:06:57,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:06:57,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684404840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:57,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:57,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-01 18:06:57,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533384056] [2022-03-01 18:06:57,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:57,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:06:57,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:57,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:06:57,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:06:57,532 INFO L87 Difference]: Start difference. First operand 1338 states and 4912 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:57,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:57,773 INFO L93 Difference]: Finished difference Result 2926 states and 9834 transitions. [2022-03-01 18:06:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:06:57,774 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:06:57,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:57,784 INFO L225 Difference]: With dead ends: 2926 [2022-03-01 18:06:57,785 INFO L226 Difference]: Without dead ends: 2537 [2022-03-01 18:06:57,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:06:57,786 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 280 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:57,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 101 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:06:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-03-01 18:06:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1717. [2022-03-01 18:06:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 3.518065268065268) internal successors, (6037), 1716 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:57,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 6037 transitions. [2022-03-01 18:06:57,863 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 6037 transitions. Word has length 26 [2022-03-01 18:06:57,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:57,863 INFO L470 AbstractCegarLoop]: Abstraction has 1717 states and 6037 transitions. [2022-03-01 18:06:57,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:57,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 6037 transitions. [2022-03-01 18:06:57,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:06:57,867 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:57,867 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] [2022-03-01 18:06:57,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:58,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-01 18:06:58,083 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:58,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:58,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1971117019, now seen corresponding path program 10 times [2022-03-01 18:06:58,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:58,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032661365] [2022-03-01 18:06:58,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:58,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:58,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:58,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032661365] [2022-03-01 18:06:58,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032661365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:58,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947066019] [2022-03-01 18:06:58,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:06:58,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:58,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:58,118 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:58,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 18:06:58,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:06:58,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:58,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:06:58,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:06:58,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:06:58,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947066019] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:58,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:58,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-01 18:06:58,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917733369] [2022-03-01 18:06:58,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:58,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:06:58,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:58,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:06:58,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:06:58,235 INFO L87 Difference]: Start difference. First operand 1717 states and 6037 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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) [2022-03-01 18:06:58,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:58,732 INFO L93 Difference]: Finished difference Result 7005 states and 23425 transitions. [2022-03-01 18:06:58,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 18:06:58,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 28 [2022-03-01 18:06:58,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:58,764 INFO L225 Difference]: With dead ends: 7005 [2022-03-01 18:06:58,764 INFO L226 Difference]: Without dead ends: 6920 [2022-03-01 18:06:58,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:06:58,767 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 308 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:58,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 128 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:06:58,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6920 states. [2022-03-01 18:06:58,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6920 to 3961. [2022-03-01 18:06:58,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3961 states, 3960 states have (on average 3.6626262626262625) internal successors, (14504), 3960 states have internal predecessors, (14504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:58,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3961 states to 3961 states and 14504 transitions. [2022-03-01 18:06:58,863 INFO L78 Accepts]: Start accepts. Automaton has 3961 states and 14504 transitions. Word has length 28 [2022-03-01 18:06:58,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:58,864 INFO L470 AbstractCegarLoop]: Abstraction has 3961 states and 14504 transitions. [2022-03-01 18:06:58,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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) [2022-03-01 18:06:58,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3961 states and 14504 transitions. [2022-03-01 18:06:58,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:06:58,872 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:58,872 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] [2022-03-01 18:06:58,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:59,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-01 18:06:59,084 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:59,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:59,084 INFO L85 PathProgramCache]: Analyzing trace with hash -191772803, now seen corresponding path program 11 times [2022-03-01 18:06:59,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:59,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063414651] [2022-03-01 18:06:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:59,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:59,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:59,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063414651] [2022-03-01 18:06:59,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063414651] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:59,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485877848] [2022-03-01 18:06:59,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:06:59,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:59,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:59,108 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:59,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 18:06:59,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:06:59,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:59,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:06:59,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:59,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:59,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485877848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:59,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:59,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 8 [2022-03-01 18:06:59,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020159641] [2022-03-01 18:06:59,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:59,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:06:59,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:59,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:06:59,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:06:59,251 INFO L87 Difference]: Start difference. First operand 3961 states and 14504 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:59,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:59,502 INFO L93 Difference]: Finished difference Result 7306 states and 25843 transitions. [2022-03-01 18:06:59,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 18:06:59,502 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 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 28 [2022-03-01 18:06:59,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:59,521 INFO L225 Difference]: With dead ends: 7306 [2022-03-01 18:06:59,521 INFO L226 Difference]: Without dead ends: 7222 [2022-03-01 18:06:59,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:06:59,522 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 131 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:59,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 75 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:06:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7222 states. [2022-03-01 18:06:59,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7222 to 5516. [2022-03-01 18:06:59,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5516 states, 5515 states have (on average 3.7071622846781507) internal successors, (20445), 5515 states have internal predecessors, (20445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:59,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5516 states to 5516 states and 20445 transitions. [2022-03-01 18:06:59,648 INFO L78 Accepts]: Start accepts. Automaton has 5516 states and 20445 transitions. Word has length 28 [2022-03-01 18:06:59,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:59,648 INFO L470 AbstractCegarLoop]: Abstraction has 5516 states and 20445 transitions. [2022-03-01 18:06:59,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:59,649 INFO L276 IsEmpty]: Start isEmpty. Operand 5516 states and 20445 transitions. [2022-03-01 18:06:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:06:59,658 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:59,658 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] [2022-03-01 18:06:59,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:59,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-01 18:06:59,874 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:59,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:59,874 INFO L85 PathProgramCache]: Analyzing trace with hash -489727391, now seen corresponding path program 12 times [2022-03-01 18:06:59,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:59,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706883700] [2022-03-01 18:06:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:59,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:59,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:59,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706883700] [2022-03-01 18:06:59,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706883700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:59,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353643518] [2022-03-01 18:06:59,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:06:59,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:59,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:59,920 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:59,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 18:06:59,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:06:59,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:59,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:06:59,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:00,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:00,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353643518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:00,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:00,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-01 18:07:00,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759780057] [2022-03-01 18:07:00,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:00,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:07:00,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:00,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:07:00,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:07:00,058 INFO L87 Difference]: Start difference. First operand 5516 states and 20445 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:00,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:00,433 INFO L93 Difference]: Finished difference Result 8819 states and 29845 transitions. [2022-03-01 18:07:00,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:07:00,434 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 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 28 [2022-03-01 18:07:00,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:00,456 INFO L225 Difference]: With dead ends: 8819 [2022-03-01 18:07:00,456 INFO L226 Difference]: Without dead ends: 8707 [2022-03-01 18:07:00,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:07:00,457 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 248 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:00,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 143 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:07:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8707 states. [2022-03-01 18:07:00,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8707 to 6491. [2022-03-01 18:07:00,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6491 states, 6490 states have (on average 3.6280431432973805) internal successors, (23546), 6490 states have internal predecessors, (23546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:00,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6491 states to 6491 states and 23546 transitions. [2022-03-01 18:07:00,701 INFO L78 Accepts]: Start accepts. Automaton has 6491 states and 23546 transitions. Word has length 28 [2022-03-01 18:07:00,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:00,701 INFO L470 AbstractCegarLoop]: Abstraction has 6491 states and 23546 transitions. [2022-03-01 18:07:00,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:00,702 INFO L276 IsEmpty]: Start isEmpty. Operand 6491 states and 23546 transitions. [2022-03-01 18:07:00,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:07:00,715 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:00,715 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:00,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-01 18:07:00,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:00,932 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:07:00,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:00,932 INFO L85 PathProgramCache]: Analyzing trace with hash -655766583, now seen corresponding path program 13 times [2022-03-01 18:07:00,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:00,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628813973] [2022-03-01 18:07:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:00,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:01,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:01,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628813973] [2022-03-01 18:07:01,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628813973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:01,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338040462] [2022-03-01 18:07:01,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:07:01,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:01,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:01,281 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:01,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 18:07:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:01,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:07:01,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:01,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-03-01 18:07:01,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:01,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-03-01 18:07:01,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-03-01 18:07:01,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-01 18:07:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:01,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:01,893 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:07:01,893 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 458 treesize of output 426 [2022-03-01 18:07:01,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:01,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:01,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:02,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:02,182 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:07:02,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:07:02,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:02,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:02,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:02,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:07:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:02,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338040462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:02,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:02,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2022-03-01 18:07:02,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400877974] [2022-03-01 18:07:02,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:02,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:07:02,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:02,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:07:02,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:07:02,294 INFO L87 Difference]: Start difference. First operand 6491 states and 23546 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:04,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:04,199 INFO L93 Difference]: Finished difference Result 13830 states and 48778 transitions. [2022-03-01 18:07:04,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 18:07:04,199 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:07:04,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:04,237 INFO L225 Difference]: With dead ends: 13830 [2022-03-01 18:07:04,237 INFO L226 Difference]: Without dead ends: 13788 [2022-03-01 18:07:04,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=382, Invalid=2270, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:07:04,238 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 292 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 2311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:04,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 357 Invalid, 2311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1938 Invalid, 0 Unknown, 333 Unchecked, 1.0s Time] [2022-03-01 18:07:04,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13788 states. [2022-03-01 18:07:04,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13788 to 6636. [2022-03-01 18:07:04,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6636 states, 6635 states have (on average 3.619894498869631) internal successors, (24018), 6635 states have internal predecessors, (24018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6636 states to 6636 states and 24018 transitions. [2022-03-01 18:07:04,458 INFO L78 Accepts]: Start accepts. Automaton has 6636 states and 24018 transitions. Word has length 30 [2022-03-01 18:07:04,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:04,458 INFO L470 AbstractCegarLoop]: Abstraction has 6636 states and 24018 transitions. [2022-03-01 18:07:04,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:04,458 INFO L276 IsEmpty]: Start isEmpty. Operand 6636 states and 24018 transitions. [2022-03-01 18:07:04,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:07:04,473 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:04,473 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:04,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:04,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-01 18:07:04,686 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:07:04,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:04,687 INFO L85 PathProgramCache]: Analyzing trace with hash 2048908809, now seen corresponding path program 14 times [2022-03-01 18:07:04,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:04,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620817835] [2022-03-01 18:07:04,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:04,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:05,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:05,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620817835] [2022-03-01 18:07:05,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620817835] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:05,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246822385] [2022-03-01 18:07:05,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:07:05,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:05,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:05,074 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:05,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 18:07:05,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:07:05,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:05,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:07:05,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:05,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-03-01 18:07:05,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:07:05,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-01 18:07:05,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-03-01 18:07:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:05,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:05,748 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:07:05,748 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 1878 treesize of output 1782 [2022-03-01 18:07:06,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:06,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:06,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:06,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:06,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:06,706 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:07:06,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:07:06,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:06,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:06,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:06,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:07:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:06,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246822385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:06,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:06,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2022-03-01 18:07:06,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067138166] [2022-03-01 18:07:06,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:06,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:07:06,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:06,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:07:06,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:07:06,823 INFO L87 Difference]: Start difference. First operand 6636 states and 24018 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:08,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:08,993 INFO L93 Difference]: Finished difference Result 13741 states and 48255 transitions. [2022-03-01 18:07:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 18:07:08,994 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:07:08,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:09,028 INFO L225 Difference]: With dead ends: 13741 [2022-03-01 18:07:09,028 INFO L226 Difference]: Without dead ends: 13699 [2022-03-01 18:07:09,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=460, Invalid=3200, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 18:07:09,030 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 315 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 2307 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 2358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:09,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 353 Invalid, 2358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2307 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:07:09,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13699 states. [2022-03-01 18:07:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13699 to 6695. [2022-03-01 18:07:09,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6695 states, 6694 states have (on average 3.6118912458918433) internal successors, (24178), 6694 states have internal predecessors, (24178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:09,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 24178 transitions. [2022-03-01 18:07:09,230 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 24178 transitions. Word has length 30 [2022-03-01 18:07:09,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:09,231 INFO L470 AbstractCegarLoop]: Abstraction has 6695 states and 24178 transitions. [2022-03-01 18:07:09,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:09,231 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 24178 transitions. [2022-03-01 18:07:09,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:07:09,244 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:09,244 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:09,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:09,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:09,460 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:07:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:09,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1054839645, now seen corresponding path program 15 times [2022-03-01 18:07:09,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:09,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881525111] [2022-03-01 18:07:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:09,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:09,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:09,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881525111] [2022-03-01 18:07:09,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881525111] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:09,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880301650] [2022-03-01 18:07:09,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:07:09,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:09,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:09,687 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:09,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 18:07:09,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:07:09,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:09,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:07:09,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:09,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-03-01 18:07:10,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:10,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:10,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:10,089 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 48 treesize of output 34 [2022-03-01 18:07:10,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:10,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-03-01 18:07:10,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-01 18:07:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:10,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:10,465 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:07:10,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1866 treesize of output 1770 [2022-03-01 18:07:10,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:10,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:10,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:10,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:10,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:10,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:10,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:10,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:07:10,792 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 22 treesize of output 41 [2022-03-01 18:07:10,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:10,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:10,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:10,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:10,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:07:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:10,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880301650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:10,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:10,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 18:07:10,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559035806] [2022-03-01 18:07:10,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:10,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:07:10,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:10,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:07:10,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:07:10,938 INFO L87 Difference]: Start difference. First operand 6695 states and 24178 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:12,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:12,769 INFO L93 Difference]: Finished difference Result 16566 states and 56696 transitions. [2022-03-01 18:07:12,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:07:12,770 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:07:12,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:12,808 INFO L225 Difference]: With dead ends: 16566 [2022-03-01 18:07:12,808 INFO L226 Difference]: Without dead ends: 16482 [2022-03-01 18:07:12,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=436, Invalid=3470, Unknown=0, NotChecked=0, Total=3906 [2022-03-01 18:07:12,809 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 356 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:12,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 285 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1296 Invalid, 0 Unknown, 260 Unchecked, 0.7s Time] [2022-03-01 18:07:12,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16482 states. [2022-03-01 18:07:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16482 to 7235. [2022-03-01 18:07:13,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7235 states, 7234 states have (on average 3.6300801769422173) internal successors, (26260), 7234 states have internal predecessors, (26260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:13,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7235 states to 7235 states and 26260 transitions. [2022-03-01 18:07:13,102 INFO L78 Accepts]: Start accepts. Automaton has 7235 states and 26260 transitions. Word has length 30 [2022-03-01 18:07:13,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:13,102 INFO L470 AbstractCegarLoop]: Abstraction has 7235 states and 26260 transitions. [2022-03-01 18:07:13,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:13,103 INFO L276 IsEmpty]: Start isEmpty. Operand 7235 states and 26260 transitions. [2022-03-01 18:07:13,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:07:13,124 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:13,124 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:13,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:13,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:13,325 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:07:13,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:13,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1811677887, now seen corresponding path program 16 times [2022-03-01 18:07:13,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:13,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776120407] [2022-03-01 18:07:13,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:13,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:13,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:13,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776120407] [2022-03-01 18:07:13,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776120407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:13,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292418059] [2022-03-01 18:07:13,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:07:13,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:13,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:13,557 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:13,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 18:07:13,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:07:13,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:13,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:07:13,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:13,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-03-01 18:07:13,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:13,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:13,975 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 48 treesize of output 34 [2022-03-01 18:07:13,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:13,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-03-01 18:07:14,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 35 [2022-03-01 18:07:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:14,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:14,310 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:07:14,310 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 1878 treesize of output 1782 [2022-03-01 18:07:14,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:14,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:14,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:14,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:14,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:14,777 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:07:14,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:07:14,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:14,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:14,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:14,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:07:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:14,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292418059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:14,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:14,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 18:07:14,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359457417] [2022-03-01 18:07:14,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:14,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:07:14,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:14,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:07:14,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:07:14,893 INFO L87 Difference]: Start difference. First operand 7235 states and 26260 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:15,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:15,736 INFO L93 Difference]: Finished difference Result 15739 states and 55669 transitions. [2022-03-01 18:07:15,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 18:07:15,736 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:07:15,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:15,774 INFO L225 Difference]: With dead ends: 15739 [2022-03-01 18:07:15,775 INFO L226 Difference]: Without dead ends: 15712 [2022-03-01 18:07:15,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:07:15,784 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 180 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 473 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:15,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 243 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1076 Invalid, 0 Unknown, 473 Unchecked, 0.5s Time] [2022-03-01 18:07:15,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15712 states. [2022-03-01 18:07:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15712 to 7238. [2022-03-01 18:07:15,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7238 states, 7237 states have (on average 3.630233522177698) internal successors, (26272), 7237 states have internal predecessors, (26272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:15,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7238 states to 7238 states and 26272 transitions. [2022-03-01 18:07:15,996 INFO L78 Accepts]: Start accepts. Automaton has 7238 states and 26272 transitions. Word has length 30 [2022-03-01 18:07:15,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:15,997 INFO L470 AbstractCegarLoop]: Abstraction has 7238 states and 26272 transitions. [2022-03-01 18:07:15,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:15,997 INFO L276 IsEmpty]: Start isEmpty. Operand 7238 states and 26272 transitions. [2022-03-01 18:07:16,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:07:16,011 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:16,011 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:16,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-01 18:07:16,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:16,227 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:07:16,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:16,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1682132343, now seen corresponding path program 17 times [2022-03-01 18:07:16,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:16,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344976268] [2022-03-01 18:07:16,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:16,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:16,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:16,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344976268] [2022-03-01 18:07:16,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344976268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:16,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626910274] [2022-03-01 18:07:16,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:07:16,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:16,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:16,458 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:16,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 18:07:16,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:07:16,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:16,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-01 18:07:16,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:16,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-03-01 18:07:16,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:16,842 INFO L353 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-03-01 18:07:16,842 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 34 [2022-03-01 18:07:16,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:16,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-03-01 18:07:16,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2022-03-01 18:07:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:17,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:17,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:17,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:17,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:17,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:17,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:17,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:17,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:17,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:17,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:17,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:17,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:17,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:07:17,476 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 22 treesize of output 41 [2022-03-01 18:07:17,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:17,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:17,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:17,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:17,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:07:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:17,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626910274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:17,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:17,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 27 [2022-03-01 18:07:17,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422024405] [2022-03-01 18:07:17,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:17,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:07:17,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:17,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:07:17,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:07:17,624 INFO L87 Difference]: Start difference. First operand 7238 states and 26272 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:21,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:21,964 INFO L93 Difference]: Finished difference Result 11143 states and 38720 transitions. [2022-03-01 18:07:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-01 18:07:21,965 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:07:21,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:21,996 INFO L225 Difference]: With dead ends: 11143 [2022-03-01 18:07:21,996 INFO L226 Difference]: Without dead ends: 11059 [2022-03-01 18:07:21,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4005 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1414, Invalid=10358, Unknown=0, NotChecked=0, Total=11772 [2022-03-01 18:07:22,019 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 318 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 2535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:22,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 573 Invalid, 2535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2262 Invalid, 0 Unknown, 216 Unchecked, 1.0s Time] [2022-03-01 18:07:22,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11059 states. [2022-03-01 18:07:22,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11059 to 7638. [2022-03-01 18:07:22,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7638 states, 7637 states have (on average 3.646458033259133) internal successors, (27848), 7637 states have internal predecessors, (27848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:22,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7638 states to 7638 states and 27848 transitions. [2022-03-01 18:07:22,307 INFO L78 Accepts]: Start accepts. Automaton has 7638 states and 27848 transitions. Word has length 30 [2022-03-01 18:07:22,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:22,307 INFO L470 AbstractCegarLoop]: Abstraction has 7638 states and 27848 transitions. [2022-03-01 18:07:22,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 7638 states and 27848 transitions. [2022-03-01 18:07:22,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:07:22,322 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:22,322 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:22,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:22,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:22,535 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:07:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:22,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1060251933, now seen corresponding path program 18 times [2022-03-01 18:07:22,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:22,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629382069] [2022-03-01 18:07:22,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:22,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:22,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:22,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629382069] [2022-03-01 18:07:22,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629382069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:22,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332776909] [2022-03-01 18:07:22,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:07:22,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:22,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:22,743 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:22,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 18:07:22,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:07:22,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:22,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:07:22,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:22,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-03-01 18:07:23,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:23,038 INFO L353 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-03-01 18:07:23,038 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 34 [2022-03-01 18:07:23,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:23,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-03-01 18:07:23,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:07:23,159 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 49 [2022-03-01 18:07:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:23,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:23,701 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:07:23,701 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 1667 treesize of output 1612 [2022-03-01 18:07:33,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:33,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:33,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:33,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:33,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2022-03-01 18:07:33,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:33,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:33,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:07:33,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2022-03-01 18:07:33,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:33,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:33,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:33,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:33,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:07:33,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:33,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:33,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:33,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:33,731 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 17 [2022-03-01 18:07:33,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:33,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:33,738 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 21 treesize of output 8 [2022-03-01 18:07:33,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:33,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:33,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:33,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:33,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 14 [2022-03-01 18:07:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:33,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332776909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:33,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:33,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-03-01 18:07:33,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472563941] [2022-03-01 18:07:33,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:33,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:07:33,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:33,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:07:33,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:07:33,827 INFO L87 Difference]: Start difference. First operand 7638 states and 27848 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:37,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:37,830 INFO L93 Difference]: Finished difference Result 18582 states and 65753 transitions. [2022-03-01 18:07:37,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:07:37,830 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:07:37,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:37,886 INFO L225 Difference]: With dead ends: 18582 [2022-03-01 18:07:37,886 INFO L226 Difference]: Without dead ends: 18528 [2022-03-01 18:07:37,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=545, Invalid=3877, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 18:07:37,887 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 196 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 897 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:37,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 372 Invalid, 1823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 902 Invalid, 0 Unknown, 897 Unchecked, 0.5s Time] [2022-03-01 18:07:37,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18528 states. [2022-03-01 18:07:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18528 to 7683. [2022-03-01 18:07:38,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 7682 states have (on average 3.6517833897422545) internal successors, (28053), 7682 states have internal predecessors, (28053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:38,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 28053 transitions. [2022-03-01 18:07:38,143 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 28053 transitions. Word has length 30 [2022-03-01 18:07:38,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:38,144 INFO L470 AbstractCegarLoop]: Abstraction has 7683 states and 28053 transitions. [2022-03-01 18:07:38,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:38,144 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 28053 transitions. [2022-03-01 18:07:38,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:07:38,160 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:38,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:38,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:38,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-01 18:07:38,377 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:07:38,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:38,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1321740765, now seen corresponding path program 19 times [2022-03-01 18:07:38,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:38,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691171322] [2022-03-01 18:07:38,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:38,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:38,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:38,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691171322] [2022-03-01 18:07:38,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691171322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:38,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131547025] [2022-03-01 18:07:38,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:07:38,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:38,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:38,596 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:38,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 18:07:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:38,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:07:38,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:38,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-03-01 18:07:38,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:38,869 INFO L353 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-03-01 18:07:38,869 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 36 [2022-03-01 18:07:38,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:38,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-03-01 18:07:38,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2022-03-01 18:07:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:39,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:39,231 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:07:39,231 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 1878 treesize of output 1782 [2022-03-01 18:07:39,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:39,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:39,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:39,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:39,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:39,607 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:07:39,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:07:39,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:39,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:39,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:39,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:07:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:39,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131547025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:39,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:39,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 18:07:39,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126272314] [2022-03-01 18:07:39,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:39,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:07:39,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:39,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:07:39,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:07:39,749 INFO L87 Difference]: Start difference. First operand 7683 states and 28053 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:43,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:43,211 INFO L93 Difference]: Finished difference Result 19248 states and 66888 transitions. [2022-03-01 18:07:43,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 18:07:43,211 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:07:43,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:43,254 INFO L225 Difference]: With dead ends: 19248 [2022-03-01 18:07:43,254 INFO L226 Difference]: Without dead ends: 19215 [2022-03-01 18:07:43,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=707, Invalid=3985, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 18:07:43,256 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 259 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 2550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:43,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 434 Invalid, 2550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2393 Invalid, 0 Unknown, 93 Unchecked, 1.1s Time] [2022-03-01 18:07:43,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19215 states. [2022-03-01 18:07:43,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19215 to 7708. [2022-03-01 18:07:43,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7708 states, 7707 states have (on average 3.6522641754249383) internal successors, (28148), 7707 states have internal predecessors, (28148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:43,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7708 states to 7708 states and 28148 transitions. [2022-03-01 18:07:43,537 INFO L78 Accepts]: Start accepts. Automaton has 7708 states and 28148 transitions. Word has length 30 [2022-03-01 18:07:43,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:43,538 INFO L470 AbstractCegarLoop]: Abstraction has 7708 states and 28148 transitions. [2022-03-01 18:07:43,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:43,538 INFO L276 IsEmpty]: Start isEmpty. Operand 7708 states and 28148 transitions. [2022-03-01 18:07:43,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:07:43,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:43,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:43,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:43,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-01 18:07:43,767 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:07:43,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:43,768 INFO L85 PathProgramCache]: Analyzing trace with hash -577320523, now seen corresponding path program 20 times [2022-03-01 18:07:43,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:43,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185948003] [2022-03-01 18:07:43,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:43,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:43,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:43,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185948003] [2022-03-01 18:07:43,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185948003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:43,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135471223] [2022-03-01 18:07:43,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:07:43,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:43,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:43,988 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:44,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 18:07:44,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:07:44,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:44,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:07:44,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:44,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-03-01 18:07:44,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:44,361 INFO L353 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-03-01 18:07:44,361 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 34 [2022-03-01 18:07:44,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:44,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-03-01 18:07:44,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2022-03-01 18:07:44,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:44,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:44,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:44,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1878 treesize of output 1782 [2022-03-01 18:07:44,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:44,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:44,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:44,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:45,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:45,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:45,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:45,033 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:07:45,033 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 22 treesize of output 41 [2022-03-01 18:07:45,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:45,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:45,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:45,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:45,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:07:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:45,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135471223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:45,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:45,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 18:07:45,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28658651] [2022-03-01 18:07:45,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:45,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:07:45,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:45,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:07:45,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:07:45,114 INFO L87 Difference]: Start difference. First operand 7708 states and 28148 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:46,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:46,284 INFO L93 Difference]: Finished difference Result 12582 states and 45616 transitions. [2022-03-01 18:07:46,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 18:07:46,285 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:07:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:46,313 INFO L225 Difference]: With dead ends: 12582 [2022-03-01 18:07:46,313 INFO L226 Difference]: Without dead ends: 12528 [2022-03-01 18:07:46,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=1554, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:07:46,314 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 196 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:46,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 193 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1224 Invalid, 0 Unknown, 206 Unchecked, 0.6s Time] [2022-03-01 18:07:46,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12528 states. [2022-03-01 18:07:46,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12528 to 8262. [2022-03-01 18:07:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8262 states, 8261 states have (on average 3.669894685873381) internal successors, (30317), 8261 states have internal predecessors, (30317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8262 states to 8262 states and 30317 transitions. [2022-03-01 18:07:46,470 INFO L78 Accepts]: Start accepts. Automaton has 8262 states and 30317 transitions. Word has length 30 [2022-03-01 18:07:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:46,470 INFO L470 AbstractCegarLoop]: Abstraction has 8262 states and 30317 transitions. [2022-03-01 18:07:46,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:46,470 INFO L276 IsEmpty]: Start isEmpty. Operand 8262 states and 30317 transitions. [2022-03-01 18:07:46,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:07:46,483 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:46,483 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:46,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:46,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:46,696 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:07:46,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:46,696 INFO L85 PathProgramCache]: Analyzing trace with hash 2027651609, now seen corresponding path program 21 times [2022-03-01 18:07:46,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:46,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350800748] [2022-03-01 18:07:46,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:46,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:46,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:46,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350800748] [2022-03-01 18:07:46,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350800748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:46,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103383373] [2022-03-01 18:07:46,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:07:46,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:46,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:46,968 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:46,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 18:07:46,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:07:46,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:46,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:07:46,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:47,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-03-01 18:07:47,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:47,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:07:47,284 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 48 [2022-03-01 18:07:47,295 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:07:47,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 37 [2022-03-01 18:07:47,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:07:47,696 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 53 [2022-03-01 18:07:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:47,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:48,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:48,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:48,261 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 35 treesize of output 33 [2022-03-01 18:07:48,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:48,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:48,288 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 35 treesize of output 33 [2022-03-01 18:07:48,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:48,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:07:48,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-01 18:07:48,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:48,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:48,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:48,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:48,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2022-03-01 18:07:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:48,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103383373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:48,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:48,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-03-01 18:07:48,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487666841] [2022-03-01 18:07:48,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:48,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:07:48,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:48,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:07:48,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:07:48,806 INFO L87 Difference]: Start difference. First operand 8262 states and 30317 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:54,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:54,194 INFO L93 Difference]: Finished difference Result 22020 states and 77830 transitions. [2022-03-01 18:07:54,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-01 18:07:54,194 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:07:54,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:54,244 INFO L225 Difference]: With dead ends: 22020 [2022-03-01 18:07:54,244 INFO L226 Difference]: Without dead ends: 21882 [2022-03-01 18:07:54,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4638 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2319, Invalid=12443, Unknown=0, NotChecked=0, Total=14762 [2022-03-01 18:07:54,250 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 541 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 3653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2646 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:54,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 621 Invalid, 3653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 920 Invalid, 0 Unknown, 2646 Unchecked, 0.5s Time] [2022-03-01 18:07:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21882 states. [2022-03-01 18:07:54,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21882 to 8357. [2022-03-01 18:07:54,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8357 states, 8356 states have (on average 3.669100047869794) internal successors, (30659), 8356 states have internal predecessors, (30659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:54,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8357 states to 8357 states and 30659 transitions. [2022-03-01 18:07:54,488 INFO L78 Accepts]: Start accepts. Automaton has 8357 states and 30659 transitions. Word has length 30 [2022-03-01 18:07:54,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:54,488 INFO L470 AbstractCegarLoop]: Abstraction has 8357 states and 30659 transitions. [2022-03-01 18:07:54,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:54,488 INFO L276 IsEmpty]: Start isEmpty. Operand 8357 states and 30659 transitions. [2022-03-01 18:07:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:07:54,501 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:54,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:54,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-01 18:07:54,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:54,720 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:07:54,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:54,720 INFO L85 PathProgramCache]: Analyzing trace with hash -2089941737, now seen corresponding path program 22 times [2022-03-01 18:07:54,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:54,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403095571] [2022-03-01 18:07:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:54,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:54,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:54,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403095571] [2022-03-01 18:07:54,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403095571] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:54,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167870457] [2022-03-01 18:07:54,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:07:54,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:54,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:54,945 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:54,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 18:07:54,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:07:54,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:54,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:07:54,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:55,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-03-01 18:07:55,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:55,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:55,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:55,288 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 48 treesize of output 34 [2022-03-01 18:07:55,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:55,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-03-01 18:07:55,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 35 [2022-03-01 18:07:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:55,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:55,671 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:07:55,671 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 1878 treesize of output 1782 [2022-03-01 18:07:56,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:56,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:56,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:56,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:56,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:56,515 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:07:56,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:07:56,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:56,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:56,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:56,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:07:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:56,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167870457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:56,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:56,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 18:07:56,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972606460] [2022-03-01 18:07:56,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:56,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:07:56,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:56,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:07:56,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:07:56,588 INFO L87 Difference]: Start difference. First operand 8357 states and 30659 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:57,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:57,526 INFO L93 Difference]: Finished difference Result 13897 states and 50065 transitions. [2022-03-01 18:07:57,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 18:07:57,527 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:07:57,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:57,559 INFO L225 Difference]: With dead ends: 13897 [2022-03-01 18:07:57,559 INFO L226 Difference]: Without dead ends: 13868 [2022-03-01 18:07:57,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:07:57,560 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 201 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:57,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 253 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1385 Invalid, 0 Unknown, 114 Unchecked, 0.5s Time] [2022-03-01 18:07:57,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13868 states. [2022-03-01 18:07:57,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13868 to 8326. [2022-03-01 18:07:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8326 states, 8325 states have (on average 3.669069069069069) internal successors, (30545), 8325 states have internal predecessors, (30545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:57,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8326 states to 8326 states and 30545 transitions. [2022-03-01 18:07:57,737 INFO L78 Accepts]: Start accepts. Automaton has 8326 states and 30545 transitions. Word has length 30 [2022-03-01 18:07:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:57,737 INFO L470 AbstractCegarLoop]: Abstraction has 8326 states and 30545 transitions. [2022-03-01 18:07:57,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:57,737 INFO L276 IsEmpty]: Start isEmpty. Operand 8326 states and 30545 transitions. [2022-03-01 18:07:57,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:07:57,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:57,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:57,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:57,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-01 18:07:57,965 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:07:57,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:57,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2003223385, now seen corresponding path program 23 times [2022-03-01 18:07:57,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:57,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838418701] [2022-03-01 18:07:57,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:57,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:58,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:58,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838418701] [2022-03-01 18:07:58,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838418701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:58,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244291430] [2022-03-01 18:07:58,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:07:58,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:58,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:58,156 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:58,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 18:07:58,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:07:58,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:58,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:07:58,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:58,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-03-01 18:07:58,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:58,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:58,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:58,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:58,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-03-01 18:07:58,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:58,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2022-03-01 18:07:58,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:58,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:58,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:58,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-03-01 18:07:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:58,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:58,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:58,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:58,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 454 treesize of output 422 [2022-03-01 18:07:58,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:58,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:58,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:58,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:58,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:58,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:58,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:59,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:07:59,000 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 22 treesize of output 41 [2022-03-01 18:07:59,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:59,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:59,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:59,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:59,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:07:59,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:59,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244291430] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:59,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:59,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-03-01 18:07:59,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38080790] [2022-03-01 18:07:59,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:59,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:07:59,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:59,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:07:59,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:07:59,085 INFO L87 Difference]: Start difference. First operand 8326 states and 30545 transitions. Second operand has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:03,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:03,790 INFO L93 Difference]: Finished difference Result 20845 states and 73188 transitions. [2022-03-01 18:08:03,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-01 18:08:03,791 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:08:03,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:03,841 INFO L225 Difference]: With dead ends: 20845 [2022-03-01 18:08:03,841 INFO L226 Difference]: Without dead ends: 20755 [2022-03-01 18:08:03,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1276, Invalid=11380, Unknown=0, NotChecked=0, Total=12656 [2022-03-01 18:08:03,845 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 535 mSDsluCounter, 1432 mSDsCounter, 0 mSdLazyCounter, 2588 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 3389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 715 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:03,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 962 Invalid, 3389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2588 Invalid, 0 Unknown, 715 Unchecked, 1.4s Time] [2022-03-01 18:08:03,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20755 states. [2022-03-01 18:08:04,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20755 to 10144. [2022-03-01 18:08:04,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 10143 states have (on average 3.7418909592822636) internal successors, (37954), 10143 states have internal predecessors, (37954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:04,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 37954 transitions. [2022-03-01 18:08:04,147 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 37954 transitions. Word has length 30 [2022-03-01 18:08:04,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:04,147 INFO L470 AbstractCegarLoop]: Abstraction has 10144 states and 37954 transitions. [2022-03-01 18:08:04,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:04,147 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 37954 transitions. [2022-03-01 18:08:04,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:08:04,179 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:04,179 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:04,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:04,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-01 18:08:04,380 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:04,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:04,380 INFO L85 PathProgramCache]: Analyzing trace with hash -547324907, now seen corresponding path program 24 times [2022-03-01 18:08:04,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:04,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161571892] [2022-03-01 18:08:04,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:04,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:04,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:04,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161571892] [2022-03-01 18:08:04,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161571892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:04,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433499327] [2022-03-01 18:08:04,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:08:04,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:04,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:04,604 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:04,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 18:08:04,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:08:04,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:04,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:08:04,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:04,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-03-01 18:08:04,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:04,881 INFO L353 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-03-01 18:08:04,881 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 36 [2022-03-01 18:08:04,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:04,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-03-01 18:08:05,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:08:05,013 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 38 [2022-03-01 18:08:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:05,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:05,678 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:08:05,679 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 2504 treesize of output 2417 [2022-03-01 18:08:05,756 WARN L325 FreeRefinementEngine]: Global settings require throwing the following exception [2022-03-01 18:08:05,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:05,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-01 18:08:05,972 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArithmeticException: BigInteger out of long range at java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.computeDerApplicabilityScore(QuantifierPusher.java:685) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.selectBestEliminatee(QuantifierPusher.java:668) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:604) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-03-01 18:08:05,975 INFO L158 Benchmark]: Toolchain (without parser) took 79455.22ms. Allocated memory was 189.8MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 152.7MB in the beginning and 1.1GB in the end (delta: -905.1MB). Peak memory consumption was 853.8MB. Max. memory is 8.0GB. [2022-03-01 18:08:05,975 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 189.8MB. Free memory is still 153.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:08:05,976 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.59ms. Allocated memory is still 189.8MB. Free memory was 152.7MB in the beginning and 151.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:08:05,976 INFO L158 Benchmark]: Boogie Preprocessor took 11.57ms. Allocated memory is still 189.8MB. Free memory was 151.2MB in the beginning and 150.2MB in the end (delta: 990.4kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:08:05,976 INFO L158 Benchmark]: RCFGBuilder took 192.67ms. Allocated memory is still 189.8MB. Free memory was 150.1MB in the beginning and 140.7MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-01 18:08:05,976 INFO L158 Benchmark]: TraceAbstraction took 79226.40ms. Allocated memory was 189.8MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 140.2MB in the beginning and 1.1GB in the end (delta: -917.7MB). Peak memory consumption was 841.2MB. Max. memory is 8.0GB. [2022-03-01 18:08:05,977 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10ms. Allocated memory is still 189.8MB. Free memory is still 153.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.59ms. Allocated memory is still 189.8MB. Free memory was 152.7MB in the beginning and 151.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.57ms. Allocated memory is still 189.8MB. Free memory was 151.2MB in the beginning and 150.2MB in the end (delta: 990.4kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 192.67ms. Allocated memory is still 189.8MB. Free memory was 150.1MB in the beginning and 140.7MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 79226.40ms. Allocated memory was 189.8MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 140.2MB in the beginning and 1.1GB in the end (delta: -917.7MB). Peak memory consumption was 841.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArithmeticException: BigInteger out of long range de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArithmeticException: BigInteger out of long range: java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-03-01 18:08:06,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...