/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/bench/exp2x3.wvr.bpl


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This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd
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[2022-02-15 13:17:19,877 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
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[2022-02-15 13:17:19,891 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-02-15 13:17:19,891 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-02-15 13:17:19,891 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-02-15 13:17:19,892 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-02-15 13:17:19,892 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-02-15 13:17:19,892 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-02-15 13:17:19,892 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-02-15 13:17:19,892 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-02-15 13:17:19,893 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-02-15 13:17:19,893 INFO  L138        SettingsManager]:  * sizeof long=4
[2022-02-15 13:17:19,893 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-02-15 13:17:19,893 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2022-02-15 13:17:19,893 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-02-15 13:17:19,893 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-02-15 13:17:19,893 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-02-15 13:17:19,893 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-02-15 13:17:19,893 INFO  L138        SettingsManager]:  * sizeof long double=12
[2022-02-15 13:17:19,894 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-02-15 13:17:19,894 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-02-15 13:17:19,894 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-02-15 13:17:19,894 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-02-15 13:17:19,894 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-02-15 13:17:19,894 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2022-02-15 13:17:19,894 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-02-15 13:17:19,894 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-02-15 13:17:19,894 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-02-15 13:17:19,895 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-02-15 13:17:19,895 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-02-15 13:17:19,895 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-02-15 13:17:19,899 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-02-15 13:17:19,899 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-02-15 13:17:19,899 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-02-15 13:17:19,900 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2022-02-15 13:17:20,078 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-02-15 13:17:20,101 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-02-15 13:17:20,103 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-02-15 13:17:20,104 INFO  L271        PluginConnector]: Initializing Boogie PL CUP Parser...
[2022-02-15 13:17:20,114 INFO  L275        PluginConnector]: Boogie PL CUP Parser initialized
[2022-02-15 13:17:20,116 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3.wvr.bpl
[2022-02-15 13:17:20,116 INFO  L110           BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3.wvr.bpl'
[2022-02-15 13:17:20,139 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-02-15 13:17:20,140 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2022-02-15 13:17:20,162 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-02-15 13:17:20,162 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-02-15 13:17:20,162 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-02-15 13:17:20,175 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:17:20" (1/1) ...
[2022-02-15 13:17:20,180 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:17:20" (1/1) ...
[2022-02-15 13:17:20,185 INFO  L137                Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0
[2022-02-15 13:17:20,187 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-02-15 13:17:20,188 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-02-15 13:17:20,188 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-02-15 13:17:20,188 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-02-15 13:17:20,194 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:17:20" (1/1) ...
[2022-02-15 13:17:20,194 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:17:20" (1/1) ...
[2022-02-15 13:17:20,195 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:17:20" (1/1) ...
[2022-02-15 13:17:20,195 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:17:20" (1/1) ...
[2022-02-15 13:17:20,196 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:17:20" (1/1) ...
[2022-02-15 13:17:20,198 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:17:20" (1/1) ...
[2022-02-15 13:17:20,199 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:17:20" (1/1) ...
[2022-02-15 13:17:20,201 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-02-15 13:17:20,202 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-02-15 13:17:20,203 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-02-15 13:17:20,203 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-02-15 13:17:20,204 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:17:20" (1/1) ...
[2022-02-15 13:17:20,212 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-02-15 13:17:20,224 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:20,249 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)
[2022-02-15 13:17:20,267 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
[2022-02-15 13:17:20,280 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration
[2022-02-15 13:17:20,280 INFO  L130     BoogieDeclarations]: Found specification of procedure thread1
[2022-02-15 13:17:20,280 INFO  L138     BoogieDeclarations]: Found implementation of procedure thread1
[2022-02-15 13:17:20,280 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration
[2022-02-15 13:17:20,280 INFO  L130     BoogieDeclarations]: Found specification of procedure thread2
[2022-02-15 13:17:20,280 INFO  L138     BoogieDeclarations]: Found implementation of procedure thread2
[2022-02-15 13:17:20,280 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration
[2022-02-15 13:17:20,280 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-02-15 13:17:20,280 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-02-15 13:17:20,281 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration
[2022-02-15 13:17:20,281 INFO  L130     BoogieDeclarations]: Found specification of procedure thread3
[2022-02-15 13:17:20,281 INFO  L138     BoogieDeclarations]: Found implementation of procedure thread3
[2022-02-15 13:17:20,281 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration
[2022-02-15 13:17:20,282 INFO  L130     BoogieDeclarations]: Found specification of procedure thread4
[2022-02-15 13:17:20,282 INFO  L138     BoogieDeclarations]: Found implementation of procedure thread4
[2022-02-15 13:17:20,283 WARN  L208             CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement
[2022-02-15 13:17:20,317 INFO  L234             CfgBuilder]: Building ICFG
[2022-02-15 13:17:20,319 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-02-15 13:17:20,406 INFO  L275             CfgBuilder]: Performing block encoding
[2022-02-15 13:17:20,411 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-02-15 13:17:20,411 INFO  L299             CfgBuilder]: Removed 0 assume(true) statements.
[2022-02-15 13:17:20,412 INFO  L202        PluginConnector]: Adding new model exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:17:20 BoogieIcfgContainer
[2022-02-15 13:17:20,412 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-02-15 13:17:20,413 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-02-15 13:17:20,413 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-02-15 13:17:20,415 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-02-15 13:17:20,416 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:17:20" (1/2) ...
[2022-02-15 13:17:20,416 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa00476 and model type exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:17:20, skipping insertion in model container
[2022-02-15 13:17:20,417 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:17:20" (2/2) ...
[2022-02-15 13:17:20,417 INFO  L111   eAbstractionObserver]: Analyzing ICFG exp2x3.wvr.bpl
[2022-02-15 13:17:20,421 WARN  L150   ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program
[2022-02-15 13:17:20,421 INFO  L205   ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-02-15 13:17:20,421 INFO  L164   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-02-15 13:17:20,421 INFO  L534   ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances.
[2022-02-15 13:17:20,449 INFO  L148    ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions.
[2022-02-15 13:17:20,496 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-02-15 13:17:20,501 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
[2022-02-15 13:17:20,501 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 5 error locations.
[2022-02-15 13:17:20,516 INFO  L111   iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow
[2022-02-15 13:17:20,637 INFO  L133   iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result  has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:20,642 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:20,660 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2022-02-15 13:17:20,660 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:20,661 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:17:20,661 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:20,665 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:20,665 INFO  L85        PathProgramCache]: Analyzing trace with hash 768516577, now seen corresponding path program 1 times
[2022-02-15 13:17:20,672 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:20,673 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802228891]
[2022-02-15 13:17:20,673 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:20,674 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:20,764 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:20,877 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:20,877 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:20,877 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802228891]
[2022-02-15 13:17:20,878 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802228891] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 13:17:20,878 INFO  L191   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 13:17:20,878 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-02-15 13:17:20,879 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116587779]
[2022-02-15 13:17:20,880 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 13:17:20,883 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-02-15 13:17:20,883 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:20,927 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-02-15 13:17:20,928 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-02-15 13:17:20,932 INFO  L87              Difference]: Start difference. First operand  has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 3 states, 3 states have (on average 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)
[2022-02-15 13:17:21,035 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:21,035 INFO  L93              Difference]: Finished difference Result 854 states and 3302 transitions.
[2022-02-15 13:17:21,036 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-02-15 13:17:21,038 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
[2022-02-15 13:17:21,038 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:21,064 INFO  L225             Difference]: With dead ends: 854
[2022-02-15 13:17:21,065 INFO  L226             Difference]: Without dead ends: 823
[2022-02-15 13:17:21,069 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
[2022-02-15 13:17:21,072 INFO  L933         BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:21,073 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:17:21,087 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 823 states.
[2022-02-15 13:17:21,187 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558.
[2022-02-15 13:17:21,189 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:21,192 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions.
[2022-02-15 13:17:21,193 INFO  L78                 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19
[2022-02-15 13:17:21,194 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:21,194 INFO  L470      AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions.
[2022-02-15 13:17:21,194 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)
[2022-02-15 13:17:21,194 INFO  L276                IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions.
[2022-02-15 13:17:21,198 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2022-02-15 13:17:21,198 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:21,198 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]
[2022-02-15 13:17:21,199 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-02-15 13:17:21,204 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:21,205 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:21,205 INFO  L85        PathProgramCache]: Analyzing trace with hash -1817520191, now seen corresponding path program 1 times
[2022-02-15 13:17:21,205 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:21,205 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862701369]
[2022-02-15 13:17:21,205 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:21,205 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:21,218 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:21,260 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:21,260 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:21,260 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862701369]
[2022-02-15 13:17:21,260 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862701369] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:21,261 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707901078]
[2022-02-15 13:17:21,261 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:21,261 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:21,261 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:21,292 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)
[2022-02-15 13:17:21,299 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-02-15 13:17:21,344 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:21,348 INFO  L263         TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core
[2022-02-15 13:17:21,351 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:21,425 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:21,425 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:21,508 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:21,508 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [707901078] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:21,508 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:21,508 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5
[2022-02-15 13:17:21,509 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640530945]
[2022-02-15 13:17:21,509 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:21,510 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-02-15 13:17:21,510 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:21,510 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-02-15 13:17:21,510 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2022-02-15 13:17:21,510 INFO  L87              Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand  has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:21,634 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:21,635 INFO  L93              Difference]: Finished difference Result 1354 states and 5079 transitions.
[2022-02-15 13:17:21,635 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-02-15 13:17:21,635 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21
[2022-02-15 13:17:21,635 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:21,643 INFO  L225             Difference]: With dead ends: 1354
[2022-02-15 13:17:21,643 INFO  L226             Difference]: Without dead ends: 1354
[2022-02-15 13:17:21,643 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
[2022-02-15 13:17:21,644 INFO  L933         BasicCegarLoop]: 22 mSDtfsCounter, 108 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:21,645 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 54 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:17:21,649 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1354 states.
[2022-02-15 13:17:21,673 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 687.
[2022-02-15 13:17:21,674 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 687 states, 686 states have (on average 3.956268221574344) internal successors, (2714), 686 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:21,677 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2714 transitions.
[2022-02-15 13:17:21,677 INFO  L78                 Accepts]: Start accepts. Automaton has 687 states and 2714 transitions. Word has length 21
[2022-02-15 13:17:21,677 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:21,677 INFO  L470      AbstractCegarLoop]: Abstraction has 687 states and 2714 transitions.
[2022-02-15 13:17:21,678 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:21,678 INFO  L276                IsEmpty]: Start isEmpty. Operand 687 states and 2714 transitions.
[2022-02-15 13:17:21,684 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2022-02-15 13:17:21,684 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:21,685 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]
[2022-02-15 13:17:21,703 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2022-02-15 13:17:21,902 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
[2022-02-15 13:17:21,904 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:21,904 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:21,905 INFO  L85        PathProgramCache]: Analyzing trace with hash 1420211201, now seen corresponding path program 1 times
[2022-02-15 13:17:21,905 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:21,905 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343077778]
[2022-02-15 13:17:21,905 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:21,905 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:21,913 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:21,936 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:21,936 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:21,936 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343077778]
[2022-02-15 13:17:21,937 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343077778] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 13:17:21,937 INFO  L191   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 13:17:21,937 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-02-15 13:17:21,937 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746418287]
[2022-02-15 13:17:21,937 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 13:17:21,937 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-02-15 13:17:21,937 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:21,938 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-02-15 13:17:21,938 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-02-15 13:17:21,938 INFO  L87              Difference]: Start difference. First operand 687 states and 2714 transitions. Second operand  has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:21,982 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:22,008 INFO  L93              Difference]: Finished difference Result 973 states and 3608 transitions.
[2022-02-15 13:17:22,008 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-02-15 13:17:22,008 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21
[2022-02-15 13:17:22,009 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:22,014 INFO  L225             Difference]: With dead ends: 973
[2022-02-15 13:17:22,014 INFO  L226             Difference]: Without dead ends: 953
[2022-02-15 13:17:22,016 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-02-15 13:17:22,017 INFO  L933         BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:22,018 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 31 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-02-15 13:17:22,021 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 953 states.
[2022-02-15 13:17:22,036 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 775.
[2022-02-15 13:17:22,037 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 775 states, 774 states have (on average 3.8359173126614987) internal successors, (2969), 774 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:22,040 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2969 transitions.
[2022-02-15 13:17:22,040 INFO  L78                 Accepts]: Start accepts. Automaton has 775 states and 2969 transitions. Word has length 21
[2022-02-15 13:17:22,041 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:22,041 INFO  L470      AbstractCegarLoop]: Abstraction has 775 states and 2969 transitions.
[2022-02-15 13:17:22,041 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:22,041 INFO  L276                IsEmpty]: Start isEmpty. Operand 775 states and 2969 transitions.
[2022-02-15 13:17:22,043 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2022-02-15 13:17:22,043 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:22,043 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]
[2022-02-15 13:17:22,044 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-02-15 13:17:22,044 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:22,046 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:22,046 INFO  L85        PathProgramCache]: Analyzing trace with hash 1433190623, now seen corresponding path program 1 times
[2022-02-15 13:17:22,046 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:22,046 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434993644]
[2022-02-15 13:17:22,046 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:22,047 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:22,061 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:22,110 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:22,110 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:22,110 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434993644]
[2022-02-15 13:17:22,111 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434993644] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:22,111 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179987533]
[2022-02-15 13:17:22,111 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:22,111 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:22,111 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:22,112 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)
[2022-02-15 13:17:22,115 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-02-15 13:17:22,146 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:22,147 INFO  L263         TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core
[2022-02-15 13:17:22,148 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:22,242 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:22,242 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:22,311 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:22,311 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179987533] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:22,311 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:22,311 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5
[2022-02-15 13:17:22,313 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561478788]
[2022-02-15 13:17:22,314 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:22,314 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-02-15 13:17:22,316 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:22,316 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-02-15 13:17:22,317 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2022-02-15 13:17:22,317 INFO  L87              Difference]: Start difference. First operand 775 states and 2969 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)
[2022-02-15 13:17:22,417 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:22,417 INFO  L93              Difference]: Finished difference Result 1814 states and 6830 transitions.
[2022-02-15 13:17:22,418 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-02-15 13:17:22,418 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 21
[2022-02-15 13:17:22,418 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:22,428 INFO  L225             Difference]: With dead ends: 1814
[2022-02-15 13:17:22,428 INFO  L226             Difference]: Without dead ends: 1814
[2022-02-15 13:17:22,428 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2022-02-15 13:17:22,430 INFO  L933         BasicCegarLoop]: 21 mSDtfsCounter, 76 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:22,431 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 61 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:17:22,434 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1814 states.
[2022-02-15 13:17:22,462 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 990.
[2022-02-15 13:17:22,464 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 990 states, 989 states have (on average 3.969666329625885) internal successors, (3926), 989 states have internal predecessors, (3926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:22,468 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 3926 transitions.
[2022-02-15 13:17:22,469 INFO  L78                 Accepts]: Start accepts. Automaton has 990 states and 3926 transitions. Word has length 21
[2022-02-15 13:17:22,470 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:22,470 INFO  L470      AbstractCegarLoop]: Abstraction has 990 states and 3926 transitions.
[2022-02-15 13:17:22,470 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)
[2022-02-15 13:17:22,471 INFO  L276                IsEmpty]: Start isEmpty. Operand 990 states and 3926 transitions.
[2022-02-15 13:17:22,474 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2022-02-15 13:17:22,474 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:22,474 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]
[2022-02-15 13:17:22,494 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:22,692 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3
[2022-02-15 13:17:22,692 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:22,693 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:22,693 INFO  L85        PathProgramCache]: Analyzing trace with hash -586124957, now seen corresponding path program 1 times
[2022-02-15 13:17:22,693 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:22,693 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671295045]
[2022-02-15 13:17:22,693 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:22,693 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:22,699 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:22,723 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:22,723 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:22,723 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671295045]
[2022-02-15 13:17:22,723 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671295045] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 13:17:22,723 INFO  L191   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 13:17:22,723 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-02-15 13:17:22,724 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074429488]
[2022-02-15 13:17:22,724 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 13:17:22,724 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-02-15 13:17:22,724 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:22,724 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-02-15 13:17:22,724 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-02-15 13:17:22,725 INFO  L87              Difference]: Start difference. First operand 990 states and 3926 transitions. Second operand  has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:22,767 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:22,767 INFO  L93              Difference]: Finished difference Result 1344 states and 5052 transitions.
[2022-02-15 13:17:22,767 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-02-15 13:17:22,767 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21
[2022-02-15 13:17:22,767 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:22,774 INFO  L225             Difference]: With dead ends: 1344
[2022-02-15 13:17:22,774 INFO  L226             Difference]: Without dead ends: 1279
[2022-02-15 13:17:22,775 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-02-15 13:17:22,775 INFO  L933         BasicCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:22,775 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 33 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-02-15 13:17:22,778 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1279 states.
[2022-02-15 13:17:22,800 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1100.
[2022-02-15 13:17:22,802 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1100 states, 1099 states have (on average 3.9008189262966333) internal successors, (4287), 1099 states have internal predecessors, (4287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:22,806 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 4287 transitions.
[2022-02-15 13:17:22,806 INFO  L78                 Accepts]: Start accepts. Automaton has 1100 states and 4287 transitions. Word has length 21
[2022-02-15 13:17:22,807 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:22,807 INFO  L470      AbstractCegarLoop]: Abstraction has 1100 states and 4287 transitions.
[2022-02-15 13:17:22,807 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:22,807 INFO  L276                IsEmpty]: Start isEmpty. Operand 1100 states and 4287 transitions.
[2022-02-15 13:17:22,810 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2022-02-15 13:17:22,810 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:22,810 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]
[2022-02-15 13:17:22,810 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2022-02-15 13:17:22,811 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:22,811 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:22,811 INFO  L85        PathProgramCache]: Analyzing trace with hash 2039889319, now seen corresponding path program 2 times
[2022-02-15 13:17:22,811 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:22,811 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106796167]
[2022-02-15 13:17:22,811 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:22,811 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:22,817 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:22,841 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:22,841 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:22,841 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106796167]
[2022-02-15 13:17:22,841 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106796167] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 13:17:22,841 INFO  L191   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 13:17:22,841 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-02-15 13:17:22,842 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326103150]
[2022-02-15 13:17:22,842 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 13:17:22,842 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-02-15 13:17:22,842 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:22,842 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-02-15 13:17:22,842 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-02-15 13:17:22,842 INFO  L87              Difference]: Start difference. First operand 1100 states and 4287 transitions. Second operand  has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:22,891 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:22,891 INFO  L93              Difference]: Finished difference Result 1412 states and 5401 transitions.
[2022-02-15 13:17:22,892 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-02-15 13:17:22,892 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21
[2022-02-15 13:17:22,892 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:22,899 INFO  L225             Difference]: With dead ends: 1412
[2022-02-15 13:17:22,899 INFO  L226             Difference]: Without dead ends: 1412
[2022-02-15 13:17:22,899 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-02-15 13:17:22,900 INFO  L933         BasicCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:22,900 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 32 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-02-15 13:17:22,902 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1412 states.
[2022-02-15 13:17:22,939 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1174.
[2022-02-15 13:17:22,941 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1174 states, 1173 states have (on average 3.9028132992327365) internal successors, (4578), 1173 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:22,946 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 4578 transitions.
[2022-02-15 13:17:22,946 INFO  L78                 Accepts]: Start accepts. Automaton has 1174 states and 4578 transitions. Word has length 21
[2022-02-15 13:17:22,946 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:22,946 INFO  L470      AbstractCegarLoop]: Abstraction has 1174 states and 4578 transitions.
[2022-02-15 13:17:22,946 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:22,946 INFO  L276                IsEmpty]: Start isEmpty. Operand 1174 states and 4578 transitions.
[2022-02-15 13:17:22,949 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2022-02-15 13:17:22,950 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:22,950 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]
[2022-02-15 13:17:22,950 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2022-02-15 13:17:22,950 INFO  L402      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:22,950 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:22,950 INFO  L85        PathProgramCache]: Analyzing trace with hash -104341599, now seen corresponding path program 2 times
[2022-02-15 13:17:22,951 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:22,951 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330683129]
[2022-02-15 13:17:22,951 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:22,951 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:22,956 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:22,978 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:22,978 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:22,978 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330683129]
[2022-02-15 13:17:22,978 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330683129] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 13:17:22,978 INFO  L191   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 13:17:22,979 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-02-15 13:17:22,979 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72823459]
[2022-02-15 13:17:22,979 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 13:17:22,979 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-02-15 13:17:22,979 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:22,979 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-02-15 13:17:22,979 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-02-15 13:17:22,980 INFO  L87              Difference]: Start difference. First operand 1174 states and 4578 transitions. Second operand  has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:23,031 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:23,031 INFO  L93              Difference]: Finished difference Result 1589 states and 6051 transitions.
[2022-02-15 13:17:23,031 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-02-15 13:17:23,032 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21
[2022-02-15 13:17:23,032 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:23,040 INFO  L225             Difference]: With dead ends: 1589
[2022-02-15 13:17:23,040 INFO  L226             Difference]: Without dead ends: 1589
[2022-02-15 13:17:23,040 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-02-15 13:17:23,041 INFO  L933         BasicCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:23,041 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 43 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-02-15 13:17:23,044 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1589 states.
[2022-02-15 13:17:23,070 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1285.
[2022-02-15 13:17:23,073 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1285 states, 1284 states have (on average 3.9088785046728973) internal successors, (5019), 1284 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:23,078 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 5019 transitions.
[2022-02-15 13:17:23,078 INFO  L78                 Accepts]: Start accepts. Automaton has 1285 states and 5019 transitions. Word has length 21
[2022-02-15 13:17:23,078 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:23,078 INFO  L470      AbstractCegarLoop]: Abstraction has 1285 states and 5019 transitions.
[2022-02-15 13:17:23,079 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:23,079 INFO  L276                IsEmpty]: Start isEmpty. Operand 1285 states and 5019 transitions.
[2022-02-15 13:17:23,082 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-02-15 13:17:23,082 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:23,082 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]
[2022-02-15 13:17:23,083 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2022-02-15 13:17:23,083 INFO  L402      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:23,083 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:23,083 INFO  L85        PathProgramCache]: Analyzing trace with hash -1270025759, now seen corresponding path program 1 times
[2022-02-15 13:17:23,083 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:23,083 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694851524]
[2022-02-15 13:17:23,083 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:23,083 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:23,090 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:23,140 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:23,141 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:23,141 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694851524]
[2022-02-15 13:17:23,141 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694851524] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:23,141 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219883166]
[2022-02-15 13:17:23,141 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:23,141 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:23,141 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:23,156 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)
[2022-02-15 13:17:23,157 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-02-15 13:17:23,184 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:23,185 INFO  L263         TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-02-15 13:17:23,187 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:23,409 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:23,409 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:23,516 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:23,517 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219883166] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:23,517 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:23,517 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 4
[2022-02-15 13:17:23,517 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285139512]
[2022-02-15 13:17:23,517 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:23,517 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-02-15 13:17:23,518 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:23,518 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-02-15 13:17:23,518 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2022-02-15 13:17:23,518 INFO  L87              Difference]: Start difference. First operand 1285 states and 5019 transitions. Second operand  has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:23,609 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:23,610 INFO  L93              Difference]: Finished difference Result 2143 states and 8130 transitions.
[2022-02-15 13:17:23,610 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-02-15 13:17:23,610 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23
[2022-02-15 13:17:23,610 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:23,620 INFO  L225             Difference]: With dead ends: 2143
[2022-02-15 13:17:23,621 INFO  L226             Difference]: Without dead ends: 2075
[2022-02-15 13:17:23,621 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2022-02-15 13:17:23,621 INFO  L933         BasicCegarLoop]: 16 mSDtfsCounter, 33 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:23,622 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 36 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:17:23,625 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2075 states.
[2022-02-15 13:17:23,679 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1564.
[2022-02-15 13:17:23,683 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1564 states, 1563 states have (on average 3.9366602687140113) internal successors, (6153), 1563 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:23,689 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 6153 transitions.
[2022-02-15 13:17:23,689 INFO  L78                 Accepts]: Start accepts. Automaton has 1564 states and 6153 transitions. Word has length 23
[2022-02-15 13:17:23,689 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:23,689 INFO  L470      AbstractCegarLoop]: Abstraction has 1564 states and 6153 transitions.
[2022-02-15 13:17:23,689 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:23,689 INFO  L276                IsEmpty]: Start isEmpty. Operand 1564 states and 6153 transitions.
[2022-02-15 13:17:23,694 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-02-15 13:17:23,694 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:23,694 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]
[2022-02-15 13:17:23,713 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:23,907 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:23,907 INFO  L402      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:23,908 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:23,908 INFO  L85        PathProgramCache]: Analyzing trace with hash 1128387681, now seen corresponding path program 2 times
[2022-02-15 13:17:23,908 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:23,908 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976414087]
[2022-02-15 13:17:23,908 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:23,908 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:23,913 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:23,973 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:17:23,973 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:23,973 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976414087]
[2022-02-15 13:17:23,973 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976414087] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 13:17:23,973 INFO  L191   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 13:17:23,974 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-02-15 13:17:23,974 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273659537]
[2022-02-15 13:17:23,974 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 13:17:23,974 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-02-15 13:17:23,974 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:23,974 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-02-15 13:17:23,974 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-02-15 13:17:23,975 INFO  L87              Difference]: Start difference. First operand 1564 states and 6153 transitions. Second operand  has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:24,045 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:24,045 INFO  L93              Difference]: Finished difference Result 2365 states and 9064 transitions.
[2022-02-15 13:17:24,045 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-02-15 13:17:24,045 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23
[2022-02-15 13:17:24,046 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:24,057 INFO  L225             Difference]: With dead ends: 2365
[2022-02-15 13:17:24,057 INFO  L226             Difference]: Without dead ends: 2297
[2022-02-15 13:17:24,058 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-02-15 13:17:24,058 INFO  L933         BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:24,058 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:17:24,061 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2297 states.
[2022-02-15 13:17:24,095 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1785.
[2022-02-15 13:17:24,099 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1785 states, 1784 states have (on average 3.9551569506726456) internal successors, (7056), 1784 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:24,105 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 7056 transitions.
[2022-02-15 13:17:24,105 INFO  L78                 Accepts]: Start accepts. Automaton has 1785 states and 7056 transitions. Word has length 23
[2022-02-15 13:17:24,106 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:24,106 INFO  L470      AbstractCegarLoop]: Abstraction has 1785 states and 7056 transitions.
[2022-02-15 13:17:24,106 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:24,106 INFO  L276                IsEmpty]: Start isEmpty. Operand 1785 states and 7056 transitions.
[2022-02-15 13:17:24,111 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-02-15 13:17:24,111 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:24,111 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]
[2022-02-15 13:17:24,111 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2022-02-15 13:17:24,111 INFO  L402      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:24,111 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:24,111 INFO  L85        PathProgramCache]: Analyzing trace with hash -1784493855, now seen corresponding path program 1 times
[2022-02-15 13:17:24,112 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:24,112 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280448035]
[2022-02-15 13:17:24,112 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:24,112 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:24,116 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:24,148 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:24,148 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:24,148 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280448035]
[2022-02-15 13:17:24,148 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280448035] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:24,148 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375821472]
[2022-02-15 13:17:24,148 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:24,149 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:24,149 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:24,164 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)
[2022-02-15 13:17:24,189 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-02-15 13:17:24,199 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:24,200 INFO  L263         TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-02-15 13:17:24,201 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:24,646 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:24,647 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:24,872 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:24,872 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375821472] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:24,872 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:24,872 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 4
[2022-02-15 13:17:24,872 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515677148]
[2022-02-15 13:17:24,872 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:24,873 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-02-15 13:17:24,873 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:24,873 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-02-15 13:17:24,873 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2022-02-15 13:17:24,873 INFO  L87              Difference]: Start difference. First operand 1785 states and 7056 transitions. Second operand  has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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)
[2022-02-15 13:17:25,020 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:25,020 INFO  L93              Difference]: Finished difference Result 2448 states and 9424 transitions.
[2022-02-15 13:17:25,021 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-02-15 13:17:25,021 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 23
[2022-02-15 13:17:25,021 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:25,035 INFO  L225             Difference]: With dead ends: 2448
[2022-02-15 13:17:25,036 INFO  L226             Difference]: Without dead ends: 2397
[2022-02-15 13:17:25,036 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2022-02-15 13:17:25,036 INFO  L933         BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:25,037 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 39 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:17:25,040 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2397 states.
[2022-02-15 13:17:25,071 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 2051.
[2022-02-15 13:17:25,075 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2051 states, 2050 states have (on average 3.951219512195122) internal successors, (8100), 2050 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:25,080 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 8100 transitions.
[2022-02-15 13:17:25,082 INFO  L78                 Accepts]: Start accepts. Automaton has 2051 states and 8100 transitions. Word has length 23
[2022-02-15 13:17:25,082 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:25,082 INFO  L470      AbstractCegarLoop]: Abstraction has 2051 states and 8100 transitions.
[2022-02-15 13:17:25,082 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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)
[2022-02-15 13:17:25,083 INFO  L276                IsEmpty]: Start isEmpty. Operand 2051 states and 8100 transitions.
[2022-02-15 13:17:25,087 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-02-15 13:17:25,088 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:25,088 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]
[2022-02-15 13:17:25,109 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2022-02-15 13:17:25,304 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:25,304 INFO  L402      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:25,305 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:25,305 INFO  L85        PathProgramCache]: Analyzing trace with hash 1452355087, now seen corresponding path program 2 times
[2022-02-15 13:17:25,305 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:25,305 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586333144]
[2022-02-15 13:17:25,305 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:25,305 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:25,309 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:25,361 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:17:25,361 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:25,362 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586333144]
[2022-02-15 13:17:25,362 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586333144] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 13:17:25,362 INFO  L191   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 13:17:25,362 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-02-15 13:17:25,362 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931065397]
[2022-02-15 13:17:25,362 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 13:17:25,362 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-02-15 13:17:25,362 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:25,362 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-02-15 13:17:25,362 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-02-15 13:17:25,363 INFO  L87              Difference]: Start difference. First operand 2051 states and 8100 transitions. Second operand  has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:25,453 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:25,453 INFO  L93              Difference]: Finished difference Result 2710 states and 10468 transitions.
[2022-02-15 13:17:25,461 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-02-15 13:17:25,461 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23
[2022-02-15 13:17:25,462 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:25,470 INFO  L225             Difference]: With dead ends: 2710
[2022-02-15 13:17:25,470 INFO  L226             Difference]: Without dead ends: 2659
[2022-02-15 13:17:25,470 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-02-15 13:17:25,470 INFO  L933         BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:25,471 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:17:25,486 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2659 states.
[2022-02-15 13:17:25,574 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2311.
[2022-02-15 13:17:25,630 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2311 states, 2310 states have (on average 3.9484848484848483) internal successors, (9121), 2310 states have internal predecessors, (9121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:25,694 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 9121 transitions.
[2022-02-15 13:17:25,694 INFO  L78                 Accepts]: Start accepts. Automaton has 2311 states and 9121 transitions. Word has length 23
[2022-02-15 13:17:25,694 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:25,694 INFO  L470      AbstractCegarLoop]: Abstraction has 2311 states and 9121 transitions.
[2022-02-15 13:17:25,699 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:25,699 INFO  L276                IsEmpty]: Start isEmpty. Operand 2311 states and 9121 transitions.
[2022-02-15 13:17:25,706 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:25,706 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:25,706 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]
[2022-02-15 13:17:25,706 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2022-02-15 13:17:25,706 INFO  L402      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:25,707 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:25,707 INFO  L85        PathProgramCache]: Analyzing trace with hash -397256989, now seen corresponding path program 3 times
[2022-02-15 13:17:25,707 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:25,707 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83875019]
[2022-02-15 13:17:25,707 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:25,707 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:25,728 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:25,776 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:25,777 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:25,777 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83875019]
[2022-02-15 13:17:25,777 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83875019] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:25,777 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770455635]
[2022-02-15 13:17:25,777 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:17:25,777 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:25,777 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:25,783 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)
[2022-02-15 13:17:25,815 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2022-02-15 13:17:25,848 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2022-02-15 13:17:25,849 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:25,849 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:25,850 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:25,925 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:25,925 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:25,973 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:25,973 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770455635] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:25,973 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:25,973 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7
[2022-02-15 13:17:25,975 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601220830]
[2022-02-15 13:17:25,975 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:25,976 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:25,976 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:25,976 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:25,976 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:25,976 INFO  L87              Difference]: Start difference. First operand 2311 states and 9121 transitions. Second operand  has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:26,525 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:26,525 INFO  L93              Difference]: Finished difference Result 6038 states and 23046 transitions.
[2022-02-15 13:17:26,525 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2022-02-15 13:17:26,526 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25
[2022-02-15 13:17:26,527 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:26,561 INFO  L225             Difference]: With dead ends: 6038
[2022-02-15 13:17:26,561 INFO  L226             Difference]: Without dead ends: 6038
[2022-02-15 13:17:26,562 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420
[2022-02-15 13:17:26,562 INFO  L933         BasicCegarLoop]: 66 mSDtfsCounter, 186 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:26,562 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 252 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:17:26,580 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6038 states.
[2022-02-15 13:17:26,663 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6038 to 2800.
[2022-02-15 13:17:26,668 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2800 states, 2799 states have (on average 4.00821722043587) internal successors, (11219), 2799 states have internal predecessors, (11219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:26,781 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 11219 transitions.
[2022-02-15 13:17:26,781 INFO  L78                 Accepts]: Start accepts. Automaton has 2800 states and 11219 transitions. Word has length 25
[2022-02-15 13:17:26,782 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:26,782 INFO  L470      AbstractCegarLoop]: Abstraction has 2800 states and 11219 transitions.
[2022-02-15 13:17:26,782 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:26,782 INFO  L276                IsEmpty]: Start isEmpty. Operand 2800 states and 11219 transitions.
[2022-02-15 13:17:26,788 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:26,788 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:26,788 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]
[2022-02-15 13:17:26,825 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:27,003 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2022-02-15 13:17:27,004 INFO  L402      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:27,004 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:27,004 INFO  L85        PathProgramCache]: Analyzing trace with hash -2030384925, now seen corresponding path program 4 times
[2022-02-15 13:17:27,004 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:27,004 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908727963]
[2022-02-15 13:17:27,004 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:27,004 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:27,012 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:27,047 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:27,047 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:27,047 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908727963]
[2022-02-15 13:17:27,047 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908727963] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:27,047 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967425819]
[2022-02-15 13:17:27,047 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:17:27,047 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:27,047 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:27,048 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)
[2022-02-15 13:17:27,049 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2022-02-15 13:17:27,088 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:17:27,088 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:27,089 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:27,090 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:27,179 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:27,179 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:27,237 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:27,237 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [967425819] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:27,237 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:27,237 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7
[2022-02-15 13:17:27,237 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622759788]
[2022-02-15 13:17:27,237 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:27,238 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:27,238 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:27,238 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:27,238 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:27,238 INFO  L87              Difference]: Start difference. First operand 2800 states and 11219 transitions. Second operand  has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:27,448 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:27,448 INFO  L93              Difference]: Finished difference Result 5607 states and 21463 transitions.
[2022-02-15 13:17:27,449 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2022-02-15 13:17:27,449 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25
[2022-02-15 13:17:27,449 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:27,465 INFO  L225             Difference]: With dead ends: 5607
[2022-02-15 13:17:27,465 INFO  L226             Difference]: Without dead ends: 5495
[2022-02-15 13:17:27,465 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272
[2022-02-15 13:17:27,466 INFO  L933         BasicCegarLoop]: 27 mSDtfsCounter, 250 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:27,466 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 142 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:17:27,471 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5495 states.
[2022-02-15 13:17:27,609 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 3696.
[2022-02-15 13:17:27,614 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3696 states, 3695 states have (on average 4.088227334235453) internal successors, (15106), 3695 states have internal predecessors, (15106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:27,637 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 15106 transitions.
[2022-02-15 13:17:27,637 INFO  L78                 Accepts]: Start accepts. Automaton has 3696 states and 15106 transitions. Word has length 25
[2022-02-15 13:17:27,637 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:27,637 INFO  L470      AbstractCegarLoop]: Abstraction has 3696 states and 15106 transitions.
[2022-02-15 13:17:27,638 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:27,638 INFO  L276                IsEmpty]: Start isEmpty. Operand 3696 states and 15106 transitions.
[2022-02-15 13:17:27,645 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:27,645 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:27,645 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]
[2022-02-15 13:17:27,701 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:27,869 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:27,870 INFO  L402      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:27,870 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:27,870 INFO  L85        PathProgramCache]: Analyzing trace with hash -638630689, now seen corresponding path program 5 times
[2022-02-15 13:17:27,870 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:27,870 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674994199]
[2022-02-15 13:17:27,870 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:27,870 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:27,874 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:27,895 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:27,895 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:27,895 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674994199]
[2022-02-15 13:17:27,895 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674994199] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:27,895 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687125085]
[2022-02-15 13:17:27,895 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:17:27,895 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:27,895 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:27,896 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)
[2022-02-15 13:17:27,897 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2022-02-15 13:17:27,932 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s)
[2022-02-15 13:17:27,932 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:27,932 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:27,933 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:27,991 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:27,991 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:28,030 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:28,031 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687125085] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:28,031 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:28,031 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7
[2022-02-15 13:17:28,031 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809220650]
[2022-02-15 13:17:28,031 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:28,031 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:28,031 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:28,031 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:28,032 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:28,032 INFO  L87              Difference]: Start difference. First operand 3696 states and 15106 transitions. Second operand  has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:28,227 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:28,227 INFO  L93              Difference]: Finished difference Result 5302 states and 20641 transitions.
[2022-02-15 13:17:28,227 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2022-02-15 13:17:28,227 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25
[2022-02-15 13:17:28,227 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:28,240 INFO  L225             Difference]: With dead ends: 5302
[2022-02-15 13:17:28,240 INFO  L226             Difference]: Without dead ends: 5302
[2022-02-15 13:17:28,241 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210
[2022-02-15 13:17:28,241 INFO  L933         BasicCegarLoop]: 29 mSDtfsCounter, 252 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:28,241 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 126 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:17:28,246 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5302 states.
[2022-02-15 13:17:28,330 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5302 to 3659.
[2022-02-15 13:17:28,335 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3659 states, 3658 states have (on average 4.064516129032258) internal successors, (14868), 3658 states have internal predecessors, (14868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:28,345 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 14868 transitions.
[2022-02-15 13:17:28,345 INFO  L78                 Accepts]: Start accepts. Automaton has 3659 states and 14868 transitions. Word has length 25
[2022-02-15 13:17:28,345 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:28,345 INFO  L470      AbstractCegarLoop]: Abstraction has 3659 states and 14868 transitions.
[2022-02-15 13:17:28,345 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:28,345 INFO  L276                IsEmpty]: Start isEmpty. Operand 3659 states and 14868 transitions.
[2022-02-15 13:17:28,352 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:28,352 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:28,352 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]
[2022-02-15 13:17:28,368 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:28,568 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:28,569 INFO  L402      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:28,569 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:28,569 INFO  L85        PathProgramCache]: Analyzing trace with hash -192019813, now seen corresponding path program 6 times
[2022-02-15 13:17:28,569 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:28,569 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468977433]
[2022-02-15 13:17:28,569 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:28,569 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:28,572 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:28,590 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:28,590 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:28,590 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468977433]
[2022-02-15 13:17:28,590 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468977433] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:28,590 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330999447]
[2022-02-15 13:17:28,590 INFO  L93    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-02-15 13:17:28,590 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:28,590 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:28,591 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)
[2022-02-15 13:17:28,615 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2022-02-15 13:17:28,617 INFO  L228   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s)
[2022-02-15 13:17:28,617 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:28,617 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:28,618 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:28,671 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:28,671 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:28,714 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:28,715 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330999447] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:28,715 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:28,715 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7
[2022-02-15 13:17:28,715 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728433798]
[2022-02-15 13:17:28,715 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:28,715 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:28,715 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:28,715 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:28,715 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:28,716 INFO  L87              Difference]: Start difference. First operand 3659 states and 14868 transitions. Second operand  has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:28,948 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:28,949 INFO  L93              Difference]: Finished difference Result 4788 states and 18687 transitions.
[2022-02-15 13:17:28,949 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:17:28,949 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25
[2022-02-15 13:17:28,949 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:28,964 INFO  L225             Difference]: With dead ends: 4788
[2022-02-15 13:17:28,964 INFO  L226             Difference]: Without dead ends: 4768
[2022-02-15 13:17:28,966 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156
[2022-02-15 13:17:28,967 INFO  L933         BasicCegarLoop]: 46 mSDtfsCounter, 158 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:28,967 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 189 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:17:28,973 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4768 states.
[2022-02-15 13:17:29,063 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 3665.
[2022-02-15 13:17:29,070 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3665 states, 3664 states have (on average 4.060316593886463) internal successors, (14877), 3664 states have internal predecessors, (14877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:29,084 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 14877 transitions.
[2022-02-15 13:17:29,084 INFO  L78                 Accepts]: Start accepts. Automaton has 3665 states and 14877 transitions. Word has length 25
[2022-02-15 13:17:29,084 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:29,084 INFO  L470      AbstractCegarLoop]: Abstraction has 3665 states and 14877 transitions.
[2022-02-15 13:17:29,084 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:29,084 INFO  L276                IsEmpty]: Start isEmpty. Operand 3665 states and 14877 transitions.
[2022-02-15 13:17:29,094 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:29,094 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:29,094 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]
[2022-02-15 13:17:29,126 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:29,313 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,SelfDestructingSolverStorable14
[2022-02-15 13:17:29,313 INFO  L402      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:29,314 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:29,314 INFO  L85        PathProgramCache]: Analyzing trace with hash -2044906781, now seen corresponding path program 7 times
[2022-02-15 13:17:29,314 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:29,314 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410775120]
[2022-02-15 13:17:29,314 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:29,314 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:29,323 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:29,348 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:29,348 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:29,348 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410775120]
[2022-02-15 13:17:29,349 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410775120] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:29,349 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191981887]
[2022-02-15 13:17:29,349 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2022-02-15 13:17:29,349 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:29,349 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:29,350 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)
[2022-02-15 13:17:29,371 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2022-02-15 13:17:29,394 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:29,394 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:29,396 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:29,465 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:29,465 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:29,507 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:17:29,507 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [191981887] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:29,507 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:29,507 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7
[2022-02-15 13:17:29,508 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243360592]
[2022-02-15 13:17:29,508 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:29,508 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:29,509 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:29,509 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:29,509 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:29,509 INFO  L87              Difference]: Start difference. First operand 3665 states and 14877 transitions. Second operand  has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:29,749 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:29,749 INFO  L93              Difference]: Finished difference Result 7954 states and 31437 transitions.
[2022-02-15 13:17:29,749 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2022-02-15 13:17:29,749 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 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
[2022-02-15 13:17:29,750 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:29,833 INFO  L225             Difference]: With dead ends: 7954
[2022-02-15 13:17:29,833 INFO  L226             Difference]: Without dead ends: 7954
[2022-02-15 13:17:29,833 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210
[2022-02-15 13:17:29,834 INFO  L933         BasicCegarLoop]: 30 mSDtfsCounter, 258 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:29,834 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 120 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:17:29,843 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7954 states.
[2022-02-15 13:17:29,937 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7954 to 4610.
[2022-02-15 13:17:29,945 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4610 states, 4609 states have (on average 4.175092210891734) internal successors, (19243), 4609 states have internal predecessors, (19243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:29,960 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 19243 transitions.
[2022-02-15 13:17:29,961 INFO  L78                 Accepts]: Start accepts. Automaton has 4610 states and 19243 transitions. Word has length 25
[2022-02-15 13:17:29,961 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:29,961 INFO  L470      AbstractCegarLoop]: Abstraction has 4610 states and 19243 transitions.
[2022-02-15 13:17:29,961 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:29,961 INFO  L276                IsEmpty]: Start isEmpty. Operand 4610 states and 19243 transitions.
[2022-02-15 13:17:29,972 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:29,972 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:29,972 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]
[2022-02-15 13:17:30,004 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:30,204 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2022-02-15 13:17:30,204 INFO  L402      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:30,204 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:30,205 INFO  L85        PathProgramCache]: Analyzing trace with hash 742460259, now seen corresponding path program 8 times
[2022-02-15 13:17:30,205 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:30,205 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100381031]
[2022-02-15 13:17:30,205 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:30,205 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:30,208 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:30,230 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:30,230 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:30,230 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100381031]
[2022-02-15 13:17:30,230 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100381031] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:30,230 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744148371]
[2022-02-15 13:17:30,230 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:17:30,230 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:30,230 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:30,231 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)
[2022-02-15 13:17:30,232 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2022-02-15 13:17:30,254 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:17:30,254 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:30,255 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:30,255 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:30,305 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:30,305 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:30,341 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:17:30,341 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744148371] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:30,341 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:30,341 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7
[2022-02-15 13:17:30,341 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498602558]
[2022-02-15 13:17:30,341 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:30,342 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:30,342 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:30,342 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:30,342 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:30,342 INFO  L87              Difference]: Start difference. First operand 4610 states and 19243 transitions. Second operand  has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:30,607 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:30,607 INFO  L93              Difference]: Finished difference Result 6087 states and 24217 transitions.
[2022-02-15 13:17:30,607 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:17:30,608 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25
[2022-02-15 13:17:30,608 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:30,626 INFO  L225             Difference]: With dead ends: 6087
[2022-02-15 13:17:30,626 INFO  L226             Difference]: Without dead ends: 6059
[2022-02-15 13:17:30,627 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156
[2022-02-15 13:17:30,628 INFO  L933         BasicCegarLoop]: 52 mSDtfsCounter, 150 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:30,628 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 207 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:17:30,638 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6059 states.
[2022-02-15 13:17:30,803 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6059 to 4587.
[2022-02-15 13:17:30,809 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4587 states, 4586 states have (on average 4.174662014827737) internal successors, (19145), 4586 states have internal predecessors, (19145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:30,823 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4587 states to 4587 states and 19145 transitions.
[2022-02-15 13:17:30,823 INFO  L78                 Accepts]: Start accepts. Automaton has 4587 states and 19145 transitions. Word has length 25
[2022-02-15 13:17:30,823 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:30,823 INFO  L470      AbstractCegarLoop]: Abstraction has 4587 states and 19145 transitions.
[2022-02-15 13:17:30,824 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:30,824 INFO  L276                IsEmpty]: Start isEmpty. Operand 4587 states and 19145 transitions.
[2022-02-15 13:17:30,833 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:30,833 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:30,834 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]
[2022-02-15 13:17:30,863 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:31,050 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,SelfDestructingSolverStorable16
[2022-02-15 13:17:31,051 INFO  L402      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:31,051 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:31,051 INFO  L85        PathProgramCache]: Analyzing trace with hash -316492321, now seen corresponding path program 9 times
[2022-02-15 13:17:31,051 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:31,051 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309185332]
[2022-02-15 13:17:31,051 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:31,051 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:31,054 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:31,082 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:31,083 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:31,083 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309185332]
[2022-02-15 13:17:31,083 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309185332] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:31,083 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800926317]
[2022-02-15 13:17:31,083 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:17:31,083 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:31,083 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:31,084 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)
[2022-02-15 13:17:31,085 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2022-02-15 13:17:31,108 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2022-02-15 13:17:31,108 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:31,109 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:31,109 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:31,177 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:31,177 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:31,225 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:17:31,225 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [800926317] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:31,225 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:31,225 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7
[2022-02-15 13:17:31,225 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795982514]
[2022-02-15 13:17:31,225 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:31,226 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:31,226 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:31,226 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:31,226 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:31,226 INFO  L87              Difference]: Start difference. First operand 4587 states and 19145 transitions. Second operand  has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:31,515 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:31,515 INFO  L93              Difference]: Finished difference Result 6950 states and 27646 transitions.
[2022-02-15 13:17:31,515 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2022-02-15 13:17:31,516 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 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
[2022-02-15 13:17:31,516 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:31,532 INFO  L225             Difference]: With dead ends: 6950
[2022-02-15 13:17:31,532 INFO  L226             Difference]: Without dead ends: 6950
[2022-02-15 13:17:31,532 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210
[2022-02-15 13:17:31,533 INFO  L933         BasicCegarLoop]: 44 mSDtfsCounter, 189 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:31,533 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 192 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:17:31,539 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6950 states.
[2022-02-15 13:17:31,670 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6950 to 4669.
[2022-02-15 13:17:31,676 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4669 states, 4668 states have (on average 4.1782347900599826) internal successors, (19504), 4668 states have internal predecessors, (19504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:31,689 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4669 states to 4669 states and 19504 transitions.
[2022-02-15 13:17:31,690 INFO  L78                 Accepts]: Start accepts. Automaton has 4669 states and 19504 transitions. Word has length 25
[2022-02-15 13:17:31,690 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:31,690 INFO  L470      AbstractCegarLoop]: Abstraction has 4669 states and 19504 transitions.
[2022-02-15 13:17:31,690 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:31,690 INFO  L276                IsEmpty]: Start isEmpty. Operand 4669 states and 19504 transitions.
[2022-02-15 13:17:31,699 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:31,699 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:31,699 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]
[2022-02-15 13:17:31,731 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:31,918 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,SelfDestructingSolverStorable17
[2022-02-15 13:17:31,918 INFO  L402      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:31,918 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:31,918 INFO  L85        PathProgramCache]: Analyzing trace with hash 130118555, now seen corresponding path program 10 times
[2022-02-15 13:17:31,918 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:31,919 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892114061]
[2022-02-15 13:17:31,919 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:31,919 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:31,921 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:31,942 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:31,942 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:31,942 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892114061]
[2022-02-15 13:17:31,942 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892114061] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:31,943 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284670731]
[2022-02-15 13:17:31,943 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:17:31,943 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:31,943 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:31,944 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)
[2022-02-15 13:17:31,945 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2022-02-15 13:17:31,967 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:17:31,967 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:31,968 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:31,968 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:32,029 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:32,029 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:32,076 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:17:32,076 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284670731] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:32,076 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:32,076 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7
[2022-02-15 13:17:32,076 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746653151]
[2022-02-15 13:17:32,076 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:32,077 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:32,077 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:32,077 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:32,077 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:32,077 INFO  L87              Difference]: Start difference. First operand 4669 states and 19504 transitions. Second operand  has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:32,342 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:32,342 INFO  L93              Difference]: Finished difference Result 7627 states and 29903 transitions.
[2022-02-15 13:17:32,342 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2022-02-15 13:17:32,342 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 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
[2022-02-15 13:17:32,342 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:32,360 INFO  L225             Difference]: With dead ends: 7627
[2022-02-15 13:17:32,361 INFO  L226             Difference]: Without dead ends: 7607
[2022-02-15 13:17:32,361 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210
[2022-02-15 13:17:32,361 INFO  L933         BasicCegarLoop]: 39 mSDtfsCounter, 265 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:32,361 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 151 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:17:32,369 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7607 states.
[2022-02-15 13:17:32,524 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 4687.
[2022-02-15 13:17:32,529 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4687 states, 4686 states have (on average 4.173068715322237) internal successors, (19555), 4686 states have internal predecessors, (19555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:32,544 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 19555 transitions.
[2022-02-15 13:17:32,544 INFO  L78                 Accepts]: Start accepts. Automaton has 4687 states and 19555 transitions. Word has length 25
[2022-02-15 13:17:32,544 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:32,544 INFO  L470      AbstractCegarLoop]: Abstraction has 4687 states and 19555 transitions.
[2022-02-15 13:17:32,544 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:32,544 INFO  L276                IsEmpty]: Start isEmpty. Operand 4687 states and 19555 transitions.
[2022-02-15 13:17:32,554 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:32,554 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:32,554 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]
[2022-02-15 13:17:32,573 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:32,773 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:32,773 INFO  L402      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:32,773 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:32,774 INFO  L85        PathProgramCache]: Analyzing trace with hash -585238749, now seen corresponding path program 11 times
[2022-02-15 13:17:32,774 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:32,774 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520917886]
[2022-02-15 13:17:32,774 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:32,774 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:32,777 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:32,798 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:32,798 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:32,798 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520917886]
[2022-02-15 13:17:32,798 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520917886] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:32,798 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992647143]
[2022-02-15 13:17:32,799 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:17:32,799 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:32,799 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:32,816 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)
[2022-02-15 13:17:32,821 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2022-02-15 13:17:32,850 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s)
[2022-02-15 13:17:32,851 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:32,851 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:32,851 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:32,925 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:32,925 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:32,976 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:32,977 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [992647143] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:32,977 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:32,977 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7
[2022-02-15 13:17:32,977 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5934330]
[2022-02-15 13:17:32,977 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:32,977 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:32,977 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:32,978 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:32,978 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:32,978 INFO  L87              Difference]: Start difference. First operand 4687 states and 19555 transitions. Second operand  has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:33,349 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:33,349 INFO  L93              Difference]: Finished difference Result 7378 states and 29710 transitions.
[2022-02-15 13:17:33,350 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2022-02-15 13:17:33,350 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25
[2022-02-15 13:17:33,350 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:33,369 INFO  L225             Difference]: With dead ends: 7378
[2022-02-15 13:17:33,369 INFO  L226             Difference]: Without dead ends: 7378
[2022-02-15 13:17:33,370 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420
[2022-02-15 13:17:33,377 INFO  L933         BasicCegarLoop]: 58 mSDtfsCounter, 161 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:33,377 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 233 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:17:33,388 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7378 states.
[2022-02-15 13:17:33,478 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 5057.
[2022-02-15 13:17:33,484 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5057 states, 5056 states have (on average 4.166139240506329) internal successors, (21064), 5056 states have internal predecessors, (21064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:33,594 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5057 states to 5057 states and 21064 transitions.
[2022-02-15 13:17:33,594 INFO  L78                 Accepts]: Start accepts. Automaton has 5057 states and 21064 transitions. Word has length 25
[2022-02-15 13:17:33,594 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:33,594 INFO  L470      AbstractCegarLoop]: Abstraction has 5057 states and 21064 transitions.
[2022-02-15 13:17:33,594 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:33,594 INFO  L276                IsEmpty]: Start isEmpty. Operand 5057 states and 21064 transitions.
[2022-02-15 13:17:33,604 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:33,604 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:33,604 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]
[2022-02-15 13:17:33,622 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:33,819 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,SelfDestructingSolverStorable19
[2022-02-15 13:17:33,820 INFO  L402      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:33,820 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:33,820 INFO  L85        PathProgramCache]: Analyzing trace with hash 1874482561, now seen corresponding path program 12 times
[2022-02-15 13:17:33,820 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:33,820 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817652252]
[2022-02-15 13:17:33,820 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:33,820 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:33,823 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:33,850 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:33,850 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:33,850 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817652252]
[2022-02-15 13:17:33,850 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817652252] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:33,850 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379418479]
[2022-02-15 13:17:33,850 INFO  L93    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-02-15 13:17:33,850 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:33,851 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:33,851 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)
[2022-02-15 13:17:33,863 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2022-02-15 13:17:33,884 INFO  L228   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s)
[2022-02-15 13:17:33,884 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:33,885 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:33,885 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:33,943 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:33,943 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:33,981 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:33,981 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [379418479] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:33,981 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:33,981 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7
[2022-02-15 13:17:33,982 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788828540]
[2022-02-15 13:17:33,982 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:33,982 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:33,982 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:33,982 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:33,982 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:33,982 INFO  L87              Difference]: Start difference. First operand 5057 states and 21064 transitions. Second operand  has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:34,261 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:34,261 INFO  L93              Difference]: Finished difference Result 7943 states and 31115 transitions.
[2022-02-15 13:17:34,261 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2022-02-15 13:17:34,261 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25
[2022-02-15 13:17:34,261 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:34,279 INFO  L225             Difference]: With dead ends: 7943
[2022-02-15 13:17:34,279 INFO  L226             Difference]: Without dead ends: 7883
[2022-02-15 13:17:34,280 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272
[2022-02-15 13:17:34,280 INFO  L933         BasicCegarLoop]: 23 mSDtfsCounter, 260 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:34,280 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 138 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:17:34,287 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7883 states.
[2022-02-15 13:17:34,362 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7883 to 5255.
[2022-02-15 13:17:34,368 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5255 states, 5254 states have (on average 4.142558051008756) internal successors, (21765), 5254 states have internal predecessors, (21765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:34,382 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5255 states to 5255 states and 21765 transitions.
[2022-02-15 13:17:34,382 INFO  L78                 Accepts]: Start accepts. Automaton has 5255 states and 21765 transitions. Word has length 25
[2022-02-15 13:17:34,382 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:34,382 INFO  L470      AbstractCegarLoop]: Abstraction has 5255 states and 21765 transitions.
[2022-02-15 13:17:34,382 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:34,382 INFO  L276                IsEmpty]: Start isEmpty. Operand 5255 states and 21765 transitions.
[2022-02-15 13:17:34,392 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:34,392 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:34,393 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]
[2022-02-15 13:17:34,410 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:34,608 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:34,608 INFO  L402      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:34,609 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:34,609 INFO  L85        PathProgramCache]: Analyzing trace with hash 1929197791, now seen corresponding path program 3 times
[2022-02-15 13:17:34,609 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:34,609 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834498390]
[2022-02-15 13:17:34,609 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:34,609 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:34,616 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:34,732 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:34,732 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:34,732 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834498390]
[2022-02-15 13:17:34,732 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834498390] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:34,732 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804759508]
[2022-02-15 13:17:34,732 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:17:34,733 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:34,733 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:34,747 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)
[2022-02-15 13:17:34,749 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2022-02-15 13:17:34,770 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2022-02-15 13:17:34,770 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:34,770 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:34,771 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:34,832 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:34,833 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:34,887 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:34,887 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804759508] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:34,887 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:34,887 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7
[2022-02-15 13:17:34,887 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428792734]
[2022-02-15 13:17:34,887 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:34,887 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:34,887 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:34,888 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:34,888 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:34,888 INFO  L87              Difference]: Start difference. First operand 5255 states and 21765 transitions. Second operand  has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:35,304 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:35,304 INFO  L93              Difference]: Finished difference Result 16146 states and 66180 transitions.
[2022-02-15 13:17:35,305 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2022-02-15 13:17:35,305 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25
[2022-02-15 13:17:35,305 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:35,370 INFO  L225             Difference]: With dead ends: 16146
[2022-02-15 13:17:35,371 INFO  L226             Difference]: Without dead ends: 16146
[2022-02-15 13:17:35,371 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420
[2022-02-15 13:17:35,372 INFO  L933         BasicCegarLoop]: 66 mSDtfsCounter, 156 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:35,372 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 268 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:17:35,395 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16146 states.
[2022-02-15 13:17:35,662 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16146 to 7401.
[2022-02-15 13:17:35,674 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7401 states, 7400 states have (on average 4.2628378378378375) internal successors, (31545), 7400 states have internal predecessors, (31545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:35,700 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7401 states to 7401 states and 31545 transitions.
[2022-02-15 13:17:35,701 INFO  L78                 Accepts]: Start accepts. Automaton has 7401 states and 31545 transitions. Word has length 25
[2022-02-15 13:17:35,701 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:35,701 INFO  L470      AbstractCegarLoop]: Abstraction has 7401 states and 31545 transitions.
[2022-02-15 13:17:35,701 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:35,701 INFO  L276                IsEmpty]: Start isEmpty. Operand 7401 states and 31545 transitions.
[2022-02-15 13:17:35,718 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:35,718 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:35,718 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]
[2022-02-15 13:17:35,736 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:35,936 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:35,936 INFO  L402      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:35,936 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:35,936 INFO  L85        PathProgramCache]: Analyzing trace with hash -1602824093, now seen corresponding path program 4 times
[2022-02-15 13:17:35,936 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:35,936 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145815360]
[2022-02-15 13:17:35,937 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:35,937 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:35,940 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:35,961 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:35,961 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:35,961 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145815360]
[2022-02-15 13:17:35,961 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145815360] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:35,961 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44851089]
[2022-02-15 13:17:35,961 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:17:35,961 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:35,961 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:35,963 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)
[2022-02-15 13:17:35,964 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2022-02-15 13:17:35,986 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:17:35,986 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:35,987 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:35,987 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:36,053 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:36,053 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:36,114 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:36,115 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [44851089] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:36,115 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:36,115 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7
[2022-02-15 13:17:36,115 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080493970]
[2022-02-15 13:17:36,115 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:36,115 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:36,115 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:36,115 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:36,115 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:36,116 INFO  L87              Difference]: Start difference. First operand 7401 states and 31545 transitions. Second operand  has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:36,424 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:36,424 INFO  L93              Difference]: Finished difference Result 15690 states and 65076 transitions.
[2022-02-15 13:17:36,424 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2022-02-15 13:17:36,425 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25
[2022-02-15 13:17:36,425 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:36,469 INFO  L225             Difference]: With dead ends: 15690
[2022-02-15 13:17:36,469 INFO  L226             Difference]: Without dead ends: 15594
[2022-02-15 13:17:36,470 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272
[2022-02-15 13:17:36,472 INFO  L933         BasicCegarLoop]: 29 mSDtfsCounter, 209 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:36,472 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 155 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:17:36,503 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15594 states.
[2022-02-15 13:17:36,861 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15594 to 10713.
[2022-02-15 13:17:36,879 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10713 states, 10712 states have (on average 4.391150112023898) internal successors, (47038), 10712 states have internal predecessors, (47038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:36,938 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10713 states to 10713 states and 47038 transitions.
[2022-02-15 13:17:36,938 INFO  L78                 Accepts]: Start accepts. Automaton has 10713 states and 47038 transitions. Word has length 25
[2022-02-15 13:17:36,938 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:36,939 INFO  L470      AbstractCegarLoop]: Abstraction has 10713 states and 47038 transitions.
[2022-02-15 13:17:36,939 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:36,939 INFO  L276                IsEmpty]: Start isEmpty. Operand 10713 states and 47038 transitions.
[2022-02-15 13:17:36,970 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:36,970 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:36,970 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]
[2022-02-15 13:17:36,988 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:37,180 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22
[2022-02-15 13:17:37,181 INFO  L402      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:37,181 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:37,181 INFO  L85        PathProgramCache]: Analyzing trace with hash -829404249, now seen corresponding path program 5 times
[2022-02-15 13:17:37,182 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:37,182 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931912064]
[2022-02-15 13:17:37,182 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:37,182 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:37,185 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:37,207 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:37,208 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:37,208 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931912064]
[2022-02-15 13:17:37,208 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931912064] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:37,208 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761860290]
[2022-02-15 13:17:37,208 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:17:37,208 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:37,208 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:37,224 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)
[2022-02-15 13:17:37,243 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2022-02-15 13:17:37,264 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s)
[2022-02-15 13:17:37,264 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:37,264 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:37,266 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:37,321 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:37,321 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:37,362 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:37,362 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [761860290] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:37,362 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:37,362 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7
[2022-02-15 13:17:37,362 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017180329]
[2022-02-15 13:17:37,362 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:37,363 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:37,363 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:37,363 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:37,363 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:37,363 INFO  L87              Difference]: Start difference. First operand 10713 states and 47038 transitions. Second operand  has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:37,779 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:37,779 INFO  L93              Difference]: Finished difference Result 15255 states and 64180 transitions.
[2022-02-15 13:17:37,779 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2022-02-15 13:17:37,779 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25
[2022-02-15 13:17:37,779 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:37,840 INFO  L225             Difference]: With dead ends: 15255
[2022-02-15 13:17:37,840 INFO  L226             Difference]: Without dead ends: 15255
[2022-02-15 13:17:37,841 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210
[2022-02-15 13:17:37,841 INFO  L933         BasicCegarLoop]: 29 mSDtfsCounter, 223 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:37,841 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 117 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:17:37,859 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15255 states.
[2022-02-15 13:17:38,130 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15255 to 10587.
[2022-02-15 13:17:38,148 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10587 states, 10586 states have (on average 4.366616285660306) internal successors, (46225), 10586 states have internal predecessors, (46225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:38,190 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10587 states to 10587 states and 46225 transitions.
[2022-02-15 13:17:38,191 INFO  L78                 Accepts]: Start accepts. Automaton has 10587 states and 46225 transitions. Word has length 25
[2022-02-15 13:17:38,191 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:38,191 INFO  L470      AbstractCegarLoop]: Abstraction has 10587 states and 46225 transitions.
[2022-02-15 13:17:38,191 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:38,191 INFO  L276                IsEmpty]: Start isEmpty. Operand 10587 states and 46225 transitions.
[2022-02-15 13:17:38,216 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:38,216 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:38,216 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]
[2022-02-15 13:17:38,233 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0
[2022-02-15 13:17:38,431 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:38,432 INFO  L402      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:38,432 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:38,432 INFO  L85        PathProgramCache]: Analyzing trace with hash 160062431, now seen corresponding path program 6 times
[2022-02-15 13:17:38,432 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:38,432 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540635909]
[2022-02-15 13:17:38,432 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:38,432 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:38,435 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:38,453 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:38,454 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:38,454 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540635909]
[2022-02-15 13:17:38,454 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540635909] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:38,454 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567071185]
[2022-02-15 13:17:38,454 INFO  L93    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-02-15 13:17:38,454 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:38,454 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:38,455 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)
[2022-02-15 13:17:38,456 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2022-02-15 13:17:38,478 INFO  L228   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s)
[2022-02-15 13:17:38,478 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:38,478 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:38,479 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:38,553 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:38,553 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:38,601 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:38,601 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [567071185] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:38,601 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:38,601 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7
[2022-02-15 13:17:38,602 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151769618]
[2022-02-15 13:17:38,602 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:38,602 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:38,602 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:38,602 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:38,602 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:38,602 INFO  L87              Difference]: Start difference. First operand 10587 states and 46225 transitions. Second operand  has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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)
[2022-02-15 13:17:38,858 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:38,858 INFO  L93              Difference]: Finished difference Result 13469 states and 56467 transitions.
[2022-02-15 13:17:38,858 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:17:38,859 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 25
[2022-02-15 13:17:38,859 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:38,895 INFO  L225             Difference]: With dead ends: 13469
[2022-02-15 13:17:38,895 INFO  L226             Difference]: Without dead ends: 13444
[2022-02-15 13:17:38,895 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156
[2022-02-15 13:17:38,896 INFO  L933         BasicCegarLoop]: 46 mSDtfsCounter, 105 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:38,896 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 213 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:17:38,907 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13444 states.
[2022-02-15 13:17:39,179 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13444 to 10653.
[2022-02-15 13:17:39,193 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10653 states, 10652 states have (on average 4.361997746901991) internal successors, (46464), 10652 states have internal predecessors, (46464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:39,226 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10653 states to 10653 states and 46464 transitions.
[2022-02-15 13:17:39,227 INFO  L78                 Accepts]: Start accepts. Automaton has 10653 states and 46464 transitions. Word has length 25
[2022-02-15 13:17:39,227 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:39,227 INFO  L470      AbstractCegarLoop]: Abstraction has 10653 states and 46464 transitions.
[2022-02-15 13:17:39,227 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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)
[2022-02-15 13:17:39,227 INFO  L276                IsEmpty]: Start isEmpty. Operand 10653 states and 46464 transitions.
[2022-02-15 13:17:39,247 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:39,247 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:39,248 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]
[2022-02-15 13:17:39,264 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:39,459 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:39,460 INFO  L402      AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:39,460 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:39,460 INFO  L85        PathProgramCache]: Analyzing trace with hash -309349743, now seen corresponding path program 7 times
[2022-02-15 13:17:39,460 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:39,564 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751284465]
[2022-02-15 13:17:39,564 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:39,564 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:39,567 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:39,606 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:39,607 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:39,607 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751284465]
[2022-02-15 13:17:39,607 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751284465] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:39,607 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151348652]
[2022-02-15 13:17:39,607 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2022-02-15 13:17:39,607 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:39,607 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:39,608 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)
[2022-02-15 13:17:39,611 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2022-02-15 13:17:39,636 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:39,636 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:39,637 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:39,708 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:39,709 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:39,763 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:17:39,763 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151348652] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:39,763 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:39,764 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7
[2022-02-15 13:17:39,764 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174761363]
[2022-02-15 13:17:39,765 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:39,765 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:39,765 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:39,766 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:39,766 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:39,766 INFO  L87              Difference]: Start difference. First operand 10653 states and 46464 transitions. Second operand  has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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)
[2022-02-15 13:17:40,131 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:40,131 INFO  L93              Difference]: Finished difference Result 23056 states and 98319 transitions.
[2022-02-15 13:17:40,132 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2022-02-15 13:17:40,132 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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
[2022-02-15 13:17:40,132 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:40,209 INFO  L225             Difference]: With dead ends: 23056
[2022-02-15 13:17:40,209 INFO  L226             Difference]: Without dead ends: 23056
[2022-02-15 13:17:40,210 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210
[2022-02-15 13:17:40,215 INFO  L933         BasicCegarLoop]: 30 mSDtfsCounter, 216 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:40,217 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 140 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:17:40,241 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23056 states.
[2022-02-15 13:17:40,641 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23056 to 14095.
[2022-02-15 13:17:40,664 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14095 states, 14094 states have (on average 4.5) internal successors, (63423), 14094 states have internal predecessors, (63423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:40,723 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14095 states to 14095 states and 63423 transitions.
[2022-02-15 13:17:40,723 INFO  L78                 Accepts]: Start accepts. Automaton has 14095 states and 63423 transitions. Word has length 25
[2022-02-15 13:17:40,723 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:40,724 INFO  L470      AbstractCegarLoop]: Abstraction has 14095 states and 63423 transitions.
[2022-02-15 13:17:40,724 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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)
[2022-02-15 13:17:40,724 INFO  L276                IsEmpty]: Start isEmpty. Operand 14095 states and 63423 transitions.
[2022-02-15 13:17:40,760 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:40,760 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:40,760 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]
[2022-02-15 13:17:40,783 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:40,978 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:40,979 INFO  L402      AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:40,979 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:40,979 INFO  L85        PathProgramCache]: Analyzing trace with hash -547313135, now seen corresponding path program 8 times
[2022-02-15 13:17:40,979 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:40,979 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283932348]
[2022-02-15 13:17:40,979 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:40,979 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:40,982 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:41,014 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:41,015 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:41,015 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283932348]
[2022-02-15 13:17:41,015 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283932348] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:41,015 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864036999]
[2022-02-15 13:17:41,015 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:17:41,015 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:41,015 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:41,020 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)
[2022-02-15 13:17:41,021 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2022-02-15 13:17:41,041 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:17:41,041 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:41,041 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:41,042 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:41,095 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:41,095 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:41,141 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:17:41,142 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [864036999] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:41,142 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:41,142 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7
[2022-02-15 13:17:41,142 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116301699]
[2022-02-15 13:17:41,142 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:41,142 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:41,142 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:41,142 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:41,142 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:41,143 INFO  L87              Difference]: Start difference. First operand 14095 states and 63423 transitions. Second operand  has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:41,426 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:41,426 INFO  L93              Difference]: Finished difference Result 18427 states and 79299 transitions.
[2022-02-15 13:17:41,426 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:17:41,426 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 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
[2022-02-15 13:17:41,426 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:41,626 INFO  L225             Difference]: With dead ends: 18427
[2022-02-15 13:17:41,626 INFO  L226             Difference]: Without dead ends: 18403
[2022-02-15 13:17:41,626 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156
[2022-02-15 13:17:41,626 INFO  L933         BasicCegarLoop]: 52 mSDtfsCounter, 140 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:41,627 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 200 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:17:41,641 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18403 states.
[2022-02-15 13:17:41,856 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18403 to 14093.
[2022-02-15 13:17:41,876 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14093 states, 14092 states have (on average 4.498864604030656) internal successors, (63398), 14092 states have internal predecessors, (63398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:42,057 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14093 states to 14093 states and 63398 transitions.
[2022-02-15 13:17:42,057 INFO  L78                 Accepts]: Start accepts. Automaton has 14093 states and 63398 transitions. Word has length 25
[2022-02-15 13:17:42,058 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:42,058 INFO  L470      AbstractCegarLoop]: Abstraction has 14093 states and 63398 transitions.
[2022-02-15 13:17:42,058 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:42,058 INFO  L276                IsEmpty]: Start isEmpty. Operand 14093 states and 63398 transitions.
[2022-02-15 13:17:42,087 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:42,087 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:42,087 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]
[2022-02-15 13:17:42,106 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:42,292 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,SelfDestructingSolverStorable26
[2022-02-15 13:17:42,293 INFO  L402      AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:42,293 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:42,293 INFO  L85        PathProgramCache]: Analyzing trace with hash 2067157521, now seen corresponding path program 9 times
[2022-02-15 13:17:42,293 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:42,293 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13950232]
[2022-02-15 13:17:42,293 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:42,293 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:42,296 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:42,314 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:42,314 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:42,314 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13950232]
[2022-02-15 13:17:42,314 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13950232] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:42,315 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835449941]
[2022-02-15 13:17:42,315 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:17:42,315 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:42,315 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:42,316 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)
[2022-02-15 13:17:42,317 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2022-02-15 13:17:42,340 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2022-02-15 13:17:42,340 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:42,344 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:42,344 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:42,413 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:42,413 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:42,460 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:17:42,460 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [835449941] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:42,460 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:42,460 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7
[2022-02-15 13:17:42,460 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413440620]
[2022-02-15 13:17:42,461 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:42,461 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:42,461 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:42,461 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:42,461 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:42,461 INFO  L87              Difference]: Start difference. First operand 14093 states and 63398 transitions. Second operand  has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:42,839 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:42,840 INFO  L93              Difference]: Finished difference Result 21428 states and 91981 transitions.
[2022-02-15 13:17:42,840 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2022-02-15 13:17:42,840 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 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
[2022-02-15 13:17:42,840 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:42,925 INFO  L225             Difference]: With dead ends: 21428
[2022-02-15 13:17:42,926 INFO  L226             Difference]: Without dead ends: 21428
[2022-02-15 13:17:42,926 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210
[2022-02-15 13:17:42,926 INFO  L933         BasicCegarLoop]: 44 mSDtfsCounter, 193 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:42,927 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 187 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:17:42,955 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21428 states.
[2022-02-15 13:17:43,428 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21428 to 14369.
[2022-02-15 13:17:43,452 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14369 states, 14368 states have (on average 4.502227171492205) internal successors, (64688), 14368 states have internal predecessors, (64688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:43,528 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14369 states to 14369 states and 64688 transitions.
[2022-02-15 13:17:43,528 INFO  L78                 Accepts]: Start accepts. Automaton has 14369 states and 64688 transitions. Word has length 25
[2022-02-15 13:17:43,528 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:43,528 INFO  L470      AbstractCegarLoop]: Abstraction has 14369 states and 64688 transitions.
[2022-02-15 13:17:43,528 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:43,636 INFO  L276                IsEmpty]: Start isEmpty. Operand 14369 states and 64688 transitions.
[2022-02-15 13:17:43,680 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:43,681 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:43,681 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]
[2022-02-15 13:17:43,698 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:43,898 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,SelfDestructingSolverStorable27
[2022-02-15 13:17:43,898 INFO  L402      AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:43,898 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:43,898 INFO  L85        PathProgramCache]: Analyzing trace with hash -1238343095, now seen corresponding path program 10 times
[2022-02-15 13:17:43,898 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:43,899 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183631152]
[2022-02-15 13:17:43,899 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:43,899 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:43,901 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:43,931 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:43,931 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:43,931 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183631152]
[2022-02-15 13:17:43,932 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183631152] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:43,932 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307953249]
[2022-02-15 13:17:43,932 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:17:43,932 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:43,932 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:43,933 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)
[2022-02-15 13:17:43,934 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process
[2022-02-15 13:17:43,956 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:17:43,956 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:43,956 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:43,957 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:44,028 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:44,028 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:44,072 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:17:44,072 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [307953249] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:44,072 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:44,072 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7
[2022-02-15 13:17:44,072 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704469731]
[2022-02-15 13:17:44,072 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:44,078 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:44,078 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:44,079 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:44,079 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:44,079 INFO  L87              Difference]: Start difference. First operand 14369 states and 64688 transitions. Second operand  has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:44,431 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:44,431 INFO  L93              Difference]: Finished difference Result 21976 states and 93132 transitions.
[2022-02-15 13:17:44,432 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2022-02-15 13:17:44,432 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 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
[2022-02-15 13:17:44,432 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:44,518 INFO  L225             Difference]: With dead ends: 21976
[2022-02-15 13:17:44,518 INFO  L226             Difference]: Without dead ends: 21951
[2022-02-15 13:17:44,518 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210
[2022-02-15 13:17:44,518 INFO  L933         BasicCegarLoop]: 38 mSDtfsCounter, 207 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:44,519 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 155 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:17:44,546 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21951 states.
[2022-02-15 13:17:44,969 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21951 to 14371.
[2022-02-15 13:17:44,990 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14371 states, 14370 states have (on average 4.501530967292972) internal successors, (64687), 14370 states have internal predecessors, (64687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:45,042 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14371 states to 14371 states and 64687 transitions.
[2022-02-15 13:17:45,043 INFO  L78                 Accepts]: Start accepts. Automaton has 14371 states and 64687 transitions. Word has length 25
[2022-02-15 13:17:45,043 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:45,043 INFO  L470      AbstractCegarLoop]: Abstraction has 14371 states and 64687 transitions.
[2022-02-15 13:17:45,043 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:45,043 INFO  L276                IsEmpty]: Start isEmpty. Operand 14371 states and 64687 transitions.
[2022-02-15 13:17:45,073 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:45,073 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:45,073 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]
[2022-02-15 13:17:45,091 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:45,275 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28
[2022-02-15 13:17:45,276 INFO  L402      AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:45,276 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:45,276 INFO  L85        PathProgramCache]: Analyzing trace with hash 1192902861, now seen corresponding path program 11 times
[2022-02-15 13:17:45,276 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:45,276 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436006338]
[2022-02-15 13:17:45,276 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:45,276 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:45,279 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:45,312 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:45,312 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:45,313 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436006338]
[2022-02-15 13:17:45,313 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436006338] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:45,313 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312934327]
[2022-02-15 13:17:45,313 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:17:45,313 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:45,313 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:45,314 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)
[2022-02-15 13:17:45,315 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process
[2022-02-15 13:17:45,334 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s)
[2022-02-15 13:17:45,334 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:45,334 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:45,335 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:45,390 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:45,390 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:45,439 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:45,439 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312934327] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:45,439 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:45,439 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7
[2022-02-15 13:17:45,439 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025952207]
[2022-02-15 13:17:45,439 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:45,439 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:45,439 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:45,439 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:45,439 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:45,440 INFO  L87              Difference]: Start difference. First operand 14371 states and 64687 transitions. Second operand  has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:45,863 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:45,863 INFO  L93              Difference]: Finished difference Result 23394 states and 101370 transitions.
[2022-02-15 13:17:45,864 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2022-02-15 13:17:45,864 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25
[2022-02-15 13:17:45,864 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:45,939 INFO  L225             Difference]: With dead ends: 23394
[2022-02-15 13:17:45,939 INFO  L226             Difference]: Without dead ends: 23394
[2022-02-15 13:17:45,939 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420
[2022-02-15 13:17:45,940 INFO  L933         BasicCegarLoop]: 59 mSDtfsCounter, 165 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:45,940 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 214 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:17:46,094 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23394 states.
[2022-02-15 13:17:46,501 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23394 to 15994.
[2022-02-15 13:17:46,527 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15994 states, 15993 states have (on average 4.474832739323454) internal successors, (71566), 15993 states have internal predecessors, (71566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:46,613 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15994 states to 15994 states and 71566 transitions.
[2022-02-15 13:17:46,614 INFO  L78                 Accepts]: Start accepts. Automaton has 15994 states and 71566 transitions. Word has length 25
[2022-02-15 13:17:46,614 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:46,614 INFO  L470      AbstractCegarLoop]: Abstraction has 15994 states and 71566 transitions.
[2022-02-15 13:17:46,614 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:46,614 INFO  L276                IsEmpty]: Start isEmpty. Operand 15994 states and 71566 transitions.
[2022-02-15 13:17:46,665 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 13:17:46,666 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:46,666 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]
[2022-02-15 13:17:46,683 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:46,880 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:46,880 INFO  L402      AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:46,881 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:46,881 INFO  L85        PathProgramCache]: Analyzing trace with hash 2059167099, now seen corresponding path program 12 times
[2022-02-15 13:17:46,881 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:46,881 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430664413]
[2022-02-15 13:17:46,881 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:46,881 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:46,884 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:46,904 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:46,904 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:46,904 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430664413]
[2022-02-15 13:17:46,905 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430664413] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:46,905 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602301974]
[2022-02-15 13:17:46,905 INFO  L93    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-02-15 13:17:46,906 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:46,906 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:46,907 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)
[2022-02-15 13:17:46,909 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process
[2022-02-15 13:17:46,935 INFO  L228   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s)
[2022-02-15 13:17:46,935 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:46,936 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-02-15 13:17:46,937 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:47,044 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:47,044 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:47,085 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:47,085 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [602301974] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:47,086 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:47,086 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7
[2022-02-15 13:17:47,086 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130684525]
[2022-02-15 13:17:47,086 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:47,086 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:47,086 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:47,087 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:47,087 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:47,087 INFO  L87              Difference]: Start difference. First operand 15994 states and 71566 transitions. Second operand  has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:47,470 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:47,470 INFO  L93              Difference]: Finished difference Result 23161 states and 98055 transitions.
[2022-02-15 13:17:47,470 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2022-02-15 13:17:47,471 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25
[2022-02-15 13:17:47,471 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:47,724 INFO  L225             Difference]: With dead ends: 23161
[2022-02-15 13:17:47,724 INFO  L226             Difference]: Without dead ends: 23070
[2022-02-15 13:17:47,725 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272
[2022-02-15 13:17:47,725 INFO  L933         BasicCegarLoop]: 25 mSDtfsCounter, 216 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:47,725 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 144 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:17:47,743 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23070 states.
[2022-02-15 13:17:48,170 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23070 to 16749.
[2022-02-15 13:17:48,195 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16749 states, 16748 states have (on average 4.4525316455696204) internal successors, (74571), 16748 states have internal predecessors, (74571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:48,254 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16749 states to 16749 states and 74571 transitions.
[2022-02-15 13:17:48,254 INFO  L78                 Accepts]: Start accepts. Automaton has 16749 states and 74571 transitions. Word has length 25
[2022-02-15 13:17:48,254 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:48,254 INFO  L470      AbstractCegarLoop]: Abstraction has 16749 states and 74571 transitions.
[2022-02-15 13:17:48,254 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:48,254 INFO  L276                IsEmpty]: Start isEmpty. Operand 16749 states and 74571 transitions.
[2022-02-15 13:17:48,290 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-02-15 13:17:48,290 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:48,290 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:17:48,321 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:48,505 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:48,506 INFO  L402      AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:48,506 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:48,506 INFO  L85        PathProgramCache]: Analyzing trace with hash -818219675, now seen corresponding path program 13 times
[2022-02-15 13:17:48,506 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:48,506 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939349114]
[2022-02-15 13:17:48,506 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:48,506 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:48,510 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:48,559 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:48,560 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:48,560 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939349114]
[2022-02-15 13:17:48,560 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939349114] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:48,560 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349448080]
[2022-02-15 13:17:48,560 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2022-02-15 13:17:48,560 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:48,560 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:48,562 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)
[2022-02-15 13:17:48,562 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process
[2022-02-15 13:17:48,582 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:48,583 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-02-15 13:17:48,583 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:48,798 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:48,798 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:48,931 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:48,931 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [349448080] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:48,931 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:48,932 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6
[2022-02-15 13:17:48,932 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257945435]
[2022-02-15 13:17:48,932 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:48,932 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-02-15 13:17:48,932 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:48,932 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-02-15 13:17:48,932 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-02-15 13:17:48,932 INFO  L87              Difference]: Start difference. First operand 16749 states and 74571 transitions. Second operand  has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:49,364 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:49,364 INFO  L93              Difference]: Finished difference Result 18350 states and 80380 transitions.
[2022-02-15 13:17:49,364 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-02-15 13:17:49,365 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27
[2022-02-15 13:17:49,365 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:49,442 INFO  L225             Difference]: With dead ends: 18350
[2022-02-15 13:17:49,442 INFO  L226             Difference]: Without dead ends: 18282
[2022-02-15 13:17:49,443 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-02-15 13:17:49,444 INFO  L933         BasicCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:49,444 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 91 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:17:49,467 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18282 states.
[2022-02-15 13:17:49,921 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18282 to 17368.
[2022-02-15 13:17:49,942 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 17368 states, 17367 states have (on average 4.438244947313871) internal successors, (77079), 17367 states have internal predecessors, (77079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:50,039 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17368 states to 17368 states and 77079 transitions.
[2022-02-15 13:17:50,040 INFO  L78                 Accepts]: Start accepts. Automaton has 17368 states and 77079 transitions. Word has length 27
[2022-02-15 13:17:50,040 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:50,040 INFO  L470      AbstractCegarLoop]: Abstraction has 17368 states and 77079 transitions.
[2022-02-15 13:17:50,040 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:50,040 INFO  L276                IsEmpty]: Start isEmpty. Operand 17368 states and 77079 transitions.
[2022-02-15 13:17:50,093 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-02-15 13:17:50,093 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:50,093 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:17:50,110 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:50,307 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,SelfDestructingSolverStorable31
[2022-02-15 13:17:50,308 INFO  L402      AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:50,308 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:50,308 INFO  L85        PathProgramCache]: Analyzing trace with hash -850989663, now seen corresponding path program 14 times
[2022-02-15 13:17:50,308 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:50,308 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496999900]
[2022-02-15 13:17:50,308 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:50,308 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:50,323 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:50,369 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:17:50,369 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:50,369 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496999900]
[2022-02-15 13:17:50,369 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496999900] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:50,369 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451895395]
[2022-02-15 13:17:50,369 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:17:50,369 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:50,369 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:50,371 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)
[2022-02-15 13:17:50,372 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process
[2022-02-15 13:17:50,399 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:17:50,400 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:50,400 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-02-15 13:17:50,401 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:50,794 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:50,794 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:50,910 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:17:50,910 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [451895395] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:50,910 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:50,910 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 7
[2022-02-15 13:17:50,911 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195071688]
[2022-02-15 13:17:50,911 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:50,911 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:50,911 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:50,911 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:50,911 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:50,911 INFO  L87              Difference]: Start difference. First operand 17368 states and 77079 transitions. Second operand  has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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)
[2022-02-15 13:17:51,407 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:51,407 INFO  L93              Difference]: Finished difference Result 19060 states and 83209 transitions.
[2022-02-15 13:17:51,408 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-02-15 13:17:51,408 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 27
[2022-02-15 13:17:51,408 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:51,490 INFO  L225             Difference]: With dead ends: 19060
[2022-02-15 13:17:51,490 INFO  L226             Difference]: Without dead ends: 18924
[2022-02-15 13:17:51,490 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:51,491 INFO  L933         BasicCegarLoop]: 28 mSDtfsCounter, 88 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:51,491 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 106 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:17:51,537 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18924 states.
[2022-02-15 13:17:51,805 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18924 to 17614.
[2022-02-15 13:17:51,832 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 17614 states, 17613 states have (on average 4.438199057514336) internal successors, (78170), 17613 states have internal predecessors, (78170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:52,050 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17614 states to 17614 states and 78170 transitions.
[2022-02-15 13:17:52,050 INFO  L78                 Accepts]: Start accepts. Automaton has 17614 states and 78170 transitions. Word has length 27
[2022-02-15 13:17:52,050 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:52,050 INFO  L470      AbstractCegarLoop]: Abstraction has 17614 states and 78170 transitions.
[2022-02-15 13:17:52,050 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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)
[2022-02-15 13:17:52,050 INFO  L276                IsEmpty]: Start isEmpty. Operand 17614 states and 78170 transitions.
[2022-02-15 13:17:52,099 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-02-15 13:17:52,099 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:52,099 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:17:52,117 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:52,316 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,SelfDestructingSolverStorable32
[2022-02-15 13:17:52,317 INFO  L402      AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:52,317 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:52,317 INFO  L85        PathProgramCache]: Analyzing trace with hash -1826966111, now seen corresponding path program 1 times
[2022-02-15 13:17:52,317 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:52,317 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134134718]
[2022-02-15 13:17:52,317 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:52,317 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:52,325 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:52,418 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:52,419 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:52,419 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134134718]
[2022-02-15 13:17:52,419 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134134718] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:52,419 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019900830]
[2022-02-15 13:17:52,419 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:52,419 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:52,419 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:52,420 INFO  L229       MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:17:52,421 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process
[2022-02-15 13:17:52,441 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:52,441 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-02-15 13:17:52,442 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:52,728 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:52,728 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:52,875 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:52,875 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019900830] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:52,875 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:52,875 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 7
[2022-02-15 13:17:52,875 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948483015]
[2022-02-15 13:17:52,875 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:52,875 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:52,875 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:52,875 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:52,876 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:52,876 INFO  L87              Difference]: Start difference. First operand 17614 states and 78170 transitions. Second operand  has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:53,192 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:53,192 INFO  L93              Difference]: Finished difference Result 18637 states and 81676 transitions.
[2022-02-15 13:17:53,192 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-02-15 13:17:53,192 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27
[2022-02-15 13:17:53,192 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:53,251 INFO  L225             Difference]: With dead ends: 18637
[2022-02-15 13:17:53,251 INFO  L226             Difference]: Without dead ends: 18269
[2022-02-15 13:17:53,252 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:53,252 INFO  L933         BasicCegarLoop]: 22 mSDtfsCounter, 54 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:53,252 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 105 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:17:53,270 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18269 states.
[2022-02-15 13:17:53,700 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18269 to 17885.
[2022-02-15 13:17:53,729 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 17885 states, 17884 states have (on average 4.4198165958398565) internal successors, (79044), 17884 states have internal predecessors, (79044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:53,807 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17885 states to 17885 states and 79044 transitions.
[2022-02-15 13:17:53,807 INFO  L78                 Accepts]: Start accepts. Automaton has 17885 states and 79044 transitions. Word has length 27
[2022-02-15 13:17:53,807 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:53,807 INFO  L470      AbstractCegarLoop]: Abstraction has 17885 states and 79044 transitions.
[2022-02-15 13:17:53,807 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:53,807 INFO  L276                IsEmpty]: Start isEmpty. Operand 17885 states and 79044 transitions.
[2022-02-15 13:17:53,855 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-02-15 13:17:53,856 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:53,856 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:17:53,874 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:54,056 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:54,057 INFO  L402      AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:54,058 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:54,058 INFO  L85        PathProgramCache]: Analyzing trace with hash 1766241133, now seen corresponding path program 2 times
[2022-02-15 13:17:54,058 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:54,058 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350086018]
[2022-02-15 13:17:54,058 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:54,058 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:54,061 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:54,110 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:17:54,110 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:54,110 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350086018]
[2022-02-15 13:17:54,110 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350086018] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:54,110 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325490874]
[2022-02-15 13:17:54,110 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:17:54,110 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:54,110 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:54,111 INFO  L229       MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:17:54,112 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process
[2022-02-15 13:17:54,133 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:17:54,133 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:54,133 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-02-15 13:17:54,134 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:54,648 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:54,648 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:54,768 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:17:54,769 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325490874] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:54,769 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:54,769 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 7
[2022-02-15 13:17:54,769 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420864990]
[2022-02-15 13:17:54,769 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:54,770 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:54,770 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:54,770 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:54,770 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:54,770 INFO  L87              Difference]: Start difference. First operand 17885 states and 79044 transitions. Second operand  has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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)
[2022-02-15 13:17:55,101 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:55,101 INFO  L93              Difference]: Finished difference Result 18717 states and 81967 transitions.
[2022-02-15 13:17:55,101 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-02-15 13:17:55,101 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 27
[2022-02-15 13:17:55,101 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:55,162 INFO  L225             Difference]: With dead ends: 18717
[2022-02-15 13:17:55,162 INFO  L226             Difference]: Without dead ends: 18403
[2022-02-15 13:17:55,162 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:55,162 INFO  L933         BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:55,163 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 81 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:17:55,180 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18403 states.
[2022-02-15 13:17:55,522 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18403 to 17947.
[2022-02-15 13:17:55,549 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 17947 states, 17946 states have (on average 4.425554441101081) internal successors, (79421), 17946 states have internal predecessors, (79421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:55,611 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17947 states to 17947 states and 79421 transitions.
[2022-02-15 13:17:55,611 INFO  L78                 Accepts]: Start accepts. Automaton has 17947 states and 79421 transitions. Word has length 27
[2022-02-15 13:17:55,611 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:55,611 INFO  L470      AbstractCegarLoop]: Abstraction has 17947 states and 79421 transitions.
[2022-02-15 13:17:55,611 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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)
[2022-02-15 13:17:55,611 INFO  L276                IsEmpty]: Start isEmpty. Operand 17947 states and 79421 transitions.
[2022-02-15 13:17:55,650 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-02-15 13:17:55,651 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:55,651 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:17:55,667 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:55,866 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:55,866 INFO  L402      AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:55,866 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:55,866 INFO  L85        PathProgramCache]: Analyzing trace with hash -29963743, now seen corresponding path program 3 times
[2022-02-15 13:17:55,867 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:55,867 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975569442]
[2022-02-15 13:17:55,867 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:55,867 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:55,870 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:56,020 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:17:56,020 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:56,020 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975569442]
[2022-02-15 13:17:56,020 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975569442] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:56,020 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63666015]
[2022-02-15 13:17:56,021 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:17:56,021 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:56,021 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:56,025 INFO  L229       MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:17:56,026 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process
[2022-02-15 13:17:56,048 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2022-02-15 13:17:56,048 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:56,048 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-02-15 13:17:56,049 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:56,282 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:56,283 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:56,423 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:17:56,423 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [63666015] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:56,423 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:56,423 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6
[2022-02-15 13:17:56,423 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93117555]
[2022-02-15 13:17:56,423 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:56,423 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-02-15 13:17:56,423 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:56,424 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-02-15 13:17:56,424 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-02-15 13:17:56,424 INFO  L87              Difference]: Start difference. First operand 17947 states and 79421 transitions. Second operand  has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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)
[2022-02-15 13:17:56,689 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:56,689 INFO  L93              Difference]: Finished difference Result 18527 states and 81623 transitions.
[2022-02-15 13:17:56,690 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-02-15 13:17:56,690 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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 27
[2022-02-15 13:17:56,690 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:56,745 INFO  L225             Difference]: With dead ends: 18527
[2022-02-15 13:17:56,745 INFO  L226             Difference]: Without dead ends: 18379
[2022-02-15 13:17:56,745 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-02-15 13:17:56,745 INFO  L933         BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:56,746 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 82 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:17:56,764 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18379 states.
[2022-02-15 13:17:57,099 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18379 to 18247.
[2022-02-15 13:17:57,126 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18247 states, 18246 states have (on average 4.422942014688151) internal successors, (80701), 18246 states have internal predecessors, (80701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:57,196 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18247 states to 18247 states and 80701 transitions.
[2022-02-15 13:17:57,196 INFO  L78                 Accepts]: Start accepts. Automaton has 18247 states and 80701 transitions. Word has length 27
[2022-02-15 13:17:57,197 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:57,197 INFO  L470      AbstractCegarLoop]: Abstraction has 18247 states and 80701 transitions.
[2022-02-15 13:17:57,197 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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)
[2022-02-15 13:17:57,197 INFO  L276                IsEmpty]: Start isEmpty. Operand 18247 states and 80701 transitions.
[2022-02-15 13:17:57,237 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-02-15 13:17:57,237 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:57,237 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:17:57,253 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:57,440 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:57,440 INFO  L402      AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:57,441 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:57,441 INFO  L85        PathProgramCache]: Analyzing trace with hash 175276469, now seen corresponding path program 4 times
[2022-02-15 13:17:57,441 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:57,441 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086441343]
[2022-02-15 13:17:57,441 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:57,441 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:57,444 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:57,564 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:57,564 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:57,564 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086441343]
[2022-02-15 13:17:57,564 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086441343] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:57,564 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154508477]
[2022-02-15 13:17:57,564 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:17:57,564 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:57,565 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:57,566 INFO  L229       MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:17:57,567 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process
[2022-02-15 13:17:57,587 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:17:57,587 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:57,587 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-02-15 13:17:57,588 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:57,942 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:57,942 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:58,030 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:58,030 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [154508477] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:58,030 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:58,030 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 7
[2022-02-15 13:17:58,030 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23377587]
[2022-02-15 13:17:58,030 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:58,032 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:17:58,032 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:58,033 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:17:58,033 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:58,033 INFO  L87              Difference]: Start difference. First operand 18247 states and 80701 transitions. Second operand  has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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)
[2022-02-15 13:17:58,342 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:17:58,342 INFO  L93              Difference]: Finished difference Result 19257 states and 84104 transitions.
[2022-02-15 13:17:58,342 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-02-15 13:17:58,343 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 27
[2022-02-15 13:17:58,343 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:17:58,413 INFO  L225             Difference]: With dead ends: 19257
[2022-02-15 13:17:58,413 INFO  L226             Difference]: Without dead ends: 18829
[2022-02-15 13:17:58,414 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:17:58,415 INFO  L933         BasicCegarLoop]: 22 mSDtfsCounter, 58 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:17:58,415 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 105 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:17:58,439 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18829 states.
[2022-02-15 13:17:58,862 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18829 to 17865.
[2022-02-15 13:17:58,890 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 17865 states, 17864 states have (on average 4.420286609941782) internal successors, (78964), 17864 states have internal predecessors, (78964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:17:58,968 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17865 states to 17865 states and 78964 transitions.
[2022-02-15 13:17:58,969 INFO  L78                 Accepts]: Start accepts. Automaton has 17865 states and 78964 transitions. Word has length 27
[2022-02-15 13:17:58,969 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:17:58,969 INFO  L470      AbstractCegarLoop]: Abstraction has 17865 states and 78964 transitions.
[2022-02-15 13:17:58,969 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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)
[2022-02-15 13:17:58,969 INFO  L276                IsEmpty]: Start isEmpty. Operand 17865 states and 78964 transitions.
[2022-02-15 13:17:59,018 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-02-15 13:17:59,018 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:17:59,018 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:17:59,037 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0
[2022-02-15 13:17:59,231 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36
[2022-02-15 13:17:59,231 INFO  L402      AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:17:59,232 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:17:59,232 INFO  L85        PathProgramCache]: Analyzing trace with hash 1757100517, now seen corresponding path program 5 times
[2022-02-15 13:17:59,232 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:17:59,232 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768155685]
[2022-02-15 13:17:59,232 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:17:59,232 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:17:59,235 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:17:59,285 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:59,285 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:17:59,285 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768155685]
[2022-02-15 13:17:59,285 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768155685] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:17:59,285 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476704031]
[2022-02-15 13:17:59,285 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:17:59,286 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:17:59,286 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:17:59,287 INFO  L229       MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:17:59,287 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process
[2022-02-15 13:17:59,308 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s)
[2022-02-15 13:17:59,308 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:17:59,309 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-02-15 13:17:59,309 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:17:59,691 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:59,691 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:17:59,822 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:17:59,823 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476704031] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:17:59,823 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:17:59,823 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6
[2022-02-15 13:17:59,823 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712298517]
[2022-02-15 13:17:59,823 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:17:59,824 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-02-15 13:17:59,824 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:17:59,824 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-02-15 13:17:59,824 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-02-15 13:17:59,824 INFO  L87              Difference]: Start difference. First operand 17865 states and 78964 transitions. Second operand  has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:00,126 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:00,127 INFO  L93              Difference]: Finished difference Result 18645 states and 81768 transitions.
[2022-02-15 13:18:00,127 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-02-15 13:18:00,127 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27
[2022-02-15 13:18:00,127 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:00,206 INFO  L225             Difference]: With dead ends: 18645
[2022-02-15 13:18:00,206 INFO  L226             Difference]: Without dead ends: 18497
[2022-02-15 13:18:00,206 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-02-15 13:18:00,206 INFO  L933         BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:00,207 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 65 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:18:00,228 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18497 states.
[2022-02-15 13:18:00,627 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18497 to 18081.
[2022-02-15 13:18:00,656 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18081 states, 18080 states have (on average 4.419358407079646) internal successors, (79902), 18080 states have internal predecessors, (79902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:00,737 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18081 states to 18081 states and 79902 transitions.
[2022-02-15 13:18:00,737 INFO  L78                 Accepts]: Start accepts. Automaton has 18081 states and 79902 transitions. Word has length 27
[2022-02-15 13:18:00,737 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:00,738 INFO  L470      AbstractCegarLoop]: Abstraction has 18081 states and 79902 transitions.
[2022-02-15 13:18:00,738 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:00,738 INFO  L276                IsEmpty]: Start isEmpty. Operand 18081 states and 79902 transitions.
[2022-02-15 13:18:00,787 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-02-15 13:18:00,787 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:00,787 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:00,812 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0
[2022-02-15 13:18:01,010 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37
[2022-02-15 13:18:01,010 INFO  L402      AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:01,010 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:01,011 INFO  L85        PathProgramCache]: Analyzing trace with hash -332468451, now seen corresponding path program 6 times
[2022-02-15 13:18:01,011 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:01,011 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717299884]
[2022-02-15 13:18:01,011 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:01,012 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:01,015 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:01,080 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:18:01,080 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:01,080 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717299884]
[2022-02-15 13:18:01,080 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717299884] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:01,080 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985446047]
[2022-02-15 13:18:01,080 INFO  L93    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-02-15 13:18:01,080 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:01,080 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:01,081 INFO  L229       MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:01,082 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process
[2022-02-15 13:18:01,105 INFO  L228   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s)
[2022-02-15 13:18:01,105 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:01,105 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-02-15 13:18:01,106 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:01,396 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:01,396 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:01,529 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:18:01,529 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985446047] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:01,529 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:01,529 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 7
[2022-02-15 13:18:01,529 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826939506]
[2022-02-15 13:18:01,529 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:01,530 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:18:01,530 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:01,530 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:18:01,530 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:18:01,530 INFO  L87              Difference]: Start difference. First operand 18081 states and 79902 transitions. Second operand  has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:02,090 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:02,091 INFO  L93              Difference]: Finished difference Result 19216 states and 83740 transitions.
[2022-02-15 13:18:02,091 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-02-15 13:18:02,091 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27
[2022-02-15 13:18:02,092 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:02,188 INFO  L225             Difference]: With dead ends: 19216
[2022-02-15 13:18:02,188 INFO  L226             Difference]: Without dead ends: 18872
[2022-02-15 13:18:02,188 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:18:02,189 INFO  L933         BasicCegarLoop]: 22 mSDtfsCounter, 50 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:02,189 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 107 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:18:02,215 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18872 states.
[2022-02-15 13:18:02,673 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18872 to 18104.
[2022-02-15 13:18:02,702 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18104 states, 18103 states have (on average 4.404131911837817) internal successors, (79728), 18103 states have internal predecessors, (79728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:02,779 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18104 states to 18104 states and 79728 transitions.
[2022-02-15 13:18:02,779 INFO  L78                 Accepts]: Start accepts. Automaton has 18104 states and 79728 transitions. Word has length 27
[2022-02-15 13:18:02,780 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:02,780 INFO  L470      AbstractCegarLoop]: Abstraction has 18104 states and 79728 transitions.
[2022-02-15 13:18:02,780 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:02,780 INFO  L276                IsEmpty]: Start isEmpty. Operand 18104 states and 79728 transitions.
[2022-02-15 13:18:02,827 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-02-15 13:18:02,827 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:02,827 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:02,844 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0
[2022-02-15 13:18:03,043 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38
[2022-02-15 13:18:03,043 INFO  L402      AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:03,044 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:03,044 INFO  L85        PathProgramCache]: Analyzing trace with hash 1609977505, now seen corresponding path program 7 times
[2022-02-15 13:18:03,044 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:03,044 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603655024]
[2022-02-15 13:18:03,044 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:03,044 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:03,047 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:03,103 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-02-15 13:18:03,104 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:03,104 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603655024]
[2022-02-15 13:18:03,104 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603655024] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 13:18:03,104 INFO  L191   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 13:18:03,104 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-02-15 13:18:03,104 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323496361]
[2022-02-15 13:18:03,104 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 13:18:03,104 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-02-15 13:18:03,104 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:03,105 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-02-15 13:18:03,105 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-02-15 13:18:03,105 INFO  L87              Difference]: Start difference. First operand 18104 states and 79728 transitions. Second operand  has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:03,343 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:03,343 INFO  L93              Difference]: Finished difference Result 18918 states and 82588 transitions.
[2022-02-15 13:18:03,343 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-02-15 13:18:03,343 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27
[2022-02-15 13:18:03,343 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:03,414 INFO  L225             Difference]: With dead ends: 18918
[2022-02-15 13:18:03,415 INFO  L226             Difference]: Without dead ends: 18720
[2022-02-15 13:18:03,415 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-02-15 13:18:03,415 INFO  L933         BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:03,415 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 39 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:18:03,438 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18720 states.
[2022-02-15 13:18:03,897 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18720 to 18128.
[2022-02-15 13:18:03,926 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18128 states, 18127 states have (on average 4.411871793457274) internal successors, (79974), 18127 states have internal predecessors, (79974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:04,005 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18128 states to 18128 states and 79974 transitions.
[2022-02-15 13:18:04,005 INFO  L78                 Accepts]: Start accepts. Automaton has 18128 states and 79974 transitions. Word has length 27
[2022-02-15 13:18:04,005 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:04,005 INFO  L470      AbstractCegarLoop]: Abstraction has 18128 states and 79974 transitions.
[2022-02-15 13:18:04,005 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:04,006 INFO  L276                IsEmpty]: Start isEmpty. Operand 18128 states and 79974 transitions.
[2022-02-15 13:18:04,239 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-02-15 13:18:04,239 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:04,239 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:04,239 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39
[2022-02-15 13:18:04,239 INFO  L402      AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:04,240 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:04,240 INFO  L85        PathProgramCache]: Analyzing trace with hash 1434619345, now seen corresponding path program 8 times
[2022-02-15 13:18:04,240 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:04,240 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001693587]
[2022-02-15 13:18:04,240 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:04,240 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:04,242 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:04,291 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:18:04,292 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:04,292 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001693587]
[2022-02-15 13:18:04,292 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001693587] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:04,292 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031712292]
[2022-02-15 13:18:04,292 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:18:04,292 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:04,292 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:04,293 INFO  L229       MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:04,293 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process
[2022-02-15 13:18:04,316 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:18:04,316 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:04,316 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-02-15 13:18:04,317 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:04,591 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:04,591 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:04,724 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:18:04,724 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031712292] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:04,724 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:04,724 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6
[2022-02-15 13:18:04,724 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119588231]
[2022-02-15 13:18:04,724 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:04,724 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-02-15 13:18:04,724 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:04,724 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-02-15 13:18:04,725 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-02-15 13:18:04,725 INFO  L87              Difference]: Start difference. First operand 18128 states and 79974 transitions. Second operand  has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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)
[2022-02-15 13:18:04,994 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:04,994 INFO  L93              Difference]: Finished difference Result 18732 states and 82218 transitions.
[2022-02-15 13:18:04,995 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-02-15 13:18:04,995 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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 27
[2022-02-15 13:18:04,995 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:05,056 INFO  L225             Difference]: With dead ends: 18732
[2022-02-15 13:18:05,056 INFO  L226             Difference]: Without dead ends: 18600
[2022-02-15 13:18:05,056 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-02-15 13:18:05,056 INFO  L933         BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:05,057 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 73 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:18:05,073 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18600 states.
[2022-02-15 13:18:05,465 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18600 to 18396.
[2022-02-15 13:18:05,493 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18396 states, 18395 states have (on average 4.410220168524056) internal successors, (81126), 18395 states have internal predecessors, (81126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:05,568 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18396 states to 18396 states and 81126 transitions.
[2022-02-15 13:18:05,568 INFO  L78                 Accepts]: Start accepts. Automaton has 18396 states and 81126 transitions. Word has length 27
[2022-02-15 13:18:05,569 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:05,569 INFO  L470      AbstractCegarLoop]: Abstraction has 18396 states and 81126 transitions.
[2022-02-15 13:18:05,569 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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)
[2022-02-15 13:18:05,569 INFO  L276                IsEmpty]: Start isEmpty. Operand 18396 states and 81126 transitions.
[2022-02-15 13:18:05,609 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-02-15 13:18:05,610 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:05,610 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:05,627 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0
[2022-02-15 13:18:05,812 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40
[2022-02-15 13:18:05,813 INFO  L402      AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:05,813 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:05,813 INFO  L85        PathProgramCache]: Analyzing trace with hash 769255917, now seen corresponding path program 9 times
[2022-02-15 13:18:05,813 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:05,813 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633407069]
[2022-02-15 13:18:05,813 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:05,813 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:05,820 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:05,999 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:18:05,999 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:05,999 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633407069]
[2022-02-15 13:18:05,999 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633407069] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:05,999 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330398279]
[2022-02-15 13:18:05,999 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:18:05,999 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:05,999 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:06,010 INFO  L229       MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:06,011 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process
[2022-02-15 13:18:06,032 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2022-02-15 13:18:06,032 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:06,032 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-02-15 13:18:06,033 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:06,289 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:06,289 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:06,425 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:18:06,425 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330398279] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:06,425 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:06,425 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 7
[2022-02-15 13:18:06,425 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651260060]
[2022-02-15 13:18:06,425 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:06,425 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:18:06,425 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:06,426 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:18:06,426 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:18:06,426 INFO  L87              Difference]: Start difference. First operand 18396 states and 81126 transitions. Second operand  has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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)
[2022-02-15 13:18:06,809 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:06,809 INFO  L93              Difference]: Finished difference Result 19604 states and 85164 transitions.
[2022-02-15 13:18:06,811 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-02-15 13:18:06,811 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 27
[2022-02-15 13:18:06,811 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:06,878 INFO  L225             Difference]: With dead ends: 19604
[2022-02-15 13:18:06,879 INFO  L226             Difference]: Without dead ends: 19208
[2022-02-15 13:18:06,879 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:18:06,879 INFO  L933         BasicCegarLoop]: 22 mSDtfsCounter, 55 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:06,879 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 119 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:18:06,901 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19208 states.
[2022-02-15 13:18:07,307 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19208 to 18044.
[2022-02-15 13:18:07,334 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18044 states, 18043 states have (on average 4.406916809843152) internal successors, (79514), 18043 states have internal predecessors, (79514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:07,404 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18044 states to 18044 states and 79514 transitions.
[2022-02-15 13:18:07,404 INFO  L78                 Accepts]: Start accepts. Automaton has 18044 states and 79514 transitions. Word has length 27
[2022-02-15 13:18:07,404 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:07,404 INFO  L470      AbstractCegarLoop]: Abstraction has 18044 states and 79514 transitions.
[2022-02-15 13:18:07,404 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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)
[2022-02-15 13:18:07,405 INFO  L276                IsEmpty]: Start isEmpty. Operand 18044 states and 79514 transitions.
[2022-02-15 13:18:07,441 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-02-15 13:18:07,441 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:07,442 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:07,457 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0
[2022-02-15 13:18:07,657 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:07,657 INFO  L402      AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:07,657 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:07,657 INFO  L85        PathProgramCache]: Analyzing trace with hash 1784277025, now seen corresponding path program 15 times
[2022-02-15 13:18:07,657 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:07,658 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630305155]
[2022-02-15 13:18:07,658 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:07,658 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:07,661 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:07,711 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:18:07,711 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:07,711 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630305155]
[2022-02-15 13:18:07,711 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630305155] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:07,712 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131831731]
[2022-02-15 13:18:07,712 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:18:07,712 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:07,712 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:07,728 INFO  L229       MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:07,729 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process
[2022-02-15 13:18:07,751 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2022-02-15 13:18:07,751 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:07,752 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-02-15 13:18:07,752 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:07,986 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:07,987 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:08,206 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:18:08,206 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131831731] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:08,206 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:08,206 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6
[2022-02-15 13:18:08,206 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747426662]
[2022-02-15 13:18:08,206 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:08,206 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-02-15 13:18:08,206 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:08,207 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-02-15 13:18:08,207 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-02-15 13:18:08,207 INFO  L87              Difference]: Start difference. First operand 18044 states and 79514 transitions. Second operand  has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:08,465 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:08,465 INFO  L93              Difference]: Finished difference Result 19592 states and 85134 transitions.
[2022-02-15 13:18:08,465 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-02-15 13:18:08,465 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27
[2022-02-15 13:18:08,465 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:08,527 INFO  L225             Difference]: With dead ends: 19592
[2022-02-15 13:18:08,528 INFO  L226             Difference]: Without dead ends: 19524
[2022-02-15 13:18:08,528 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-02-15 13:18:08,528 INFO  L933         BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:08,528 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 79 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 13:18:08,548 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19524 states.
[2022-02-15 13:18:08,939 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19524 to 18554.
[2022-02-15 13:18:08,968 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18554 states, 18553 states have (on average 4.396647442462135) internal successors, (81571), 18553 states have internal predecessors, (81571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:09,053 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18554 states to 18554 states and 81571 transitions.
[2022-02-15 13:18:09,053 INFO  L78                 Accepts]: Start accepts. Automaton has 18554 states and 81571 transitions. Word has length 27
[2022-02-15 13:18:09,054 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:09,054 INFO  L470      AbstractCegarLoop]: Abstraction has 18554 states and 81571 transitions.
[2022-02-15 13:18:09,054 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:09,054 INFO  L276                IsEmpty]: Start isEmpty. Operand 18554 states and 81571 transitions.
[2022-02-15 13:18:09,099 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-02-15 13:18:09,099 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:09,099 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:09,115 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0
[2022-02-15 13:18:09,310 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42
[2022-02-15 13:18:09,310 INFO  L402      AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:09,311 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:09,311 INFO  L85        PathProgramCache]: Analyzing trace with hash -1862975263, now seen corresponding path program 13 times
[2022-02-15 13:18:09,311 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:09,311 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718908849]
[2022-02-15 13:18:09,311 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:09,311 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:09,314 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:09,351 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:09,351 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:09,351 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718908849]
[2022-02-15 13:18:09,351 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718908849] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:09,351 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078123403]
[2022-02-15 13:18:09,351 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2022-02-15 13:18:09,351 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:09,351 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:09,352 INFO  L229       MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:09,354 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process
[2022-02-15 13:18:09,373 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:09,374 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-02-15 13:18:09,374 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:09,610 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:09,610 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:09,719 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:09,719 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078123403] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:09,720 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:09,720 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6
[2022-02-15 13:18:09,720 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388554307]
[2022-02-15 13:18:09,720 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:09,720 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-02-15 13:18:09,720 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:09,720 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-02-15 13:18:09,720 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-02-15 13:18:09,720 INFO  L87              Difference]: Start difference. First operand 18554 states and 81571 transitions. Second operand  has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:10,167 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:10,167 INFO  L93              Difference]: Finished difference Result 20100 states and 87095 transitions.
[2022-02-15 13:18:10,167 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-02-15 13:18:10,167 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27
[2022-02-15 13:18:10,167 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:10,241 INFO  L225             Difference]: With dead ends: 20100
[2022-02-15 13:18:10,241 INFO  L226             Difference]: Without dead ends: 20049
[2022-02-15 13:18:10,241 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-02-15 13:18:10,241 INFO  L933         BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:10,241 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 94 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:18:10,263 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20049 states.
[2022-02-15 13:18:10,731 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20049 to 19378.
[2022-02-15 13:18:10,763 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19378 states, 19377 states have (on average 4.372555091087372) internal successors, (84727), 19377 states have internal predecessors, (84727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:10,842 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19378 states to 19378 states and 84727 transitions.
[2022-02-15 13:18:10,842 INFO  L78                 Accepts]: Start accepts. Automaton has 19378 states and 84727 transitions. Word has length 27
[2022-02-15 13:18:10,842 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:10,842 INFO  L470      AbstractCegarLoop]: Abstraction has 19378 states and 84727 transitions.
[2022-02-15 13:18:10,842 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:10,842 INFO  L276                IsEmpty]: Start isEmpty. Operand 19378 states and 84727 transitions.
[2022-02-15 13:18:10,892 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-02-15 13:18:10,892 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:10,893 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:10,909 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0
[2022-02-15 13:18:11,095 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:11,095 INFO  L402      AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:11,096 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:11,096 INFO  L85        PathProgramCache]: Analyzing trace with hash 932751691, now seen corresponding path program 14 times
[2022-02-15 13:18:11,096 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:11,096 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018216630]
[2022-02-15 13:18:11,096 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:11,096 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:11,099 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:11,139 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:18:11,140 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:11,140 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018216630]
[2022-02-15 13:18:11,140 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018216630] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:11,140 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744115027]
[2022-02-15 13:18:11,140 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:18:11,140 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:11,140 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:11,141 INFO  L229       MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:11,142 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process
[2022-02-15 13:18:11,166 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:18:11,166 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:11,166 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-02-15 13:18:11,167 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:11,442 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:11,442 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:11,549 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:18:11,549 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [744115027] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:11,549 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:11,549 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 7
[2022-02-15 13:18:11,549 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864572142]
[2022-02-15 13:18:11,550 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:11,550 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-02-15 13:18:11,550 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:11,550 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-02-15 13:18:11,550 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:18:11,550 INFO  L87              Difference]: Start difference. First operand 19378 states and 84727 transitions. Second operand  has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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)
[2022-02-15 13:18:12,020 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:12,021 INFO  L93              Difference]: Finished difference Result 20827 states and 89877 transitions.
[2022-02-15 13:18:12,021 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-02-15 13:18:12,021 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 27
[2022-02-15 13:18:12,021 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:12,082 INFO  L225             Difference]: With dead ends: 20827
[2022-02-15 13:18:12,083 INFO  L226             Difference]: Without dead ends: 20725
[2022-02-15 13:18:12,083 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-02-15 13:18:12,083 INFO  L933         BasicCegarLoop]: 28 mSDtfsCounter, 80 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:12,083 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 100 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:18:12,100 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20725 states.
[2022-02-15 13:18:12,513 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20725 to 19777.
[2022-02-15 13:18:12,543 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19777 states, 19776 states have (on average 4.364229368932039) internal successors, (86307), 19776 states have internal predecessors, (86307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:12,627 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19777 states to 19777 states and 86307 transitions.
[2022-02-15 13:18:12,627 INFO  L78                 Accepts]: Start accepts. Automaton has 19777 states and 86307 transitions. Word has length 27
[2022-02-15 13:18:12,627 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:12,628 INFO  L470      AbstractCegarLoop]: Abstraction has 19777 states and 86307 transitions.
[2022-02-15 13:18:12,628 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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)
[2022-02-15 13:18:12,628 INFO  L276                IsEmpty]: Start isEmpty. Operand 19777 states and 86307 transitions.
[2022-02-15 13:18:12,674 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-02-15 13:18:12,674 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:12,674 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:12,690 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0
[2022-02-15 13:18:12,887 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44
[2022-02-15 13:18:12,887 INFO  L402      AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:12,888 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:12,888 INFO  L85        PathProgramCache]: Analyzing trace with hash -534835761, now seen corresponding path program 15 times
[2022-02-15 13:18:12,888 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:12,888 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983554213]
[2022-02-15 13:18:12,888 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:12,888 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:12,896 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:12,931 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:18:12,931 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:12,931 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983554213]
[2022-02-15 13:18:12,931 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983554213] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:12,931 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127021478]
[2022-02-15 13:18:12,931 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:18:12,931 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:12,931 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:12,932 INFO  L229       MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:12,933 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process
[2022-02-15 13:18:12,955 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2022-02-15 13:18:12,956 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:12,956 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-02-15 13:18:12,957 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:13,149 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:13,149 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:13,228 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:18:13,228 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127021478] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:13,228 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:13,228 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6
[2022-02-15 13:18:13,228 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834226204]
[2022-02-15 13:18:13,228 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:13,228 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-02-15 13:18:13,228 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:13,229 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-02-15 13:18:13,229 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-02-15 13:18:13,229 INFO  L87              Difference]: Start difference. First operand 19777 states and 86307 transitions. Second operand  has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:13,685 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:13,685 INFO  L93              Difference]: Finished difference Result 21148 states and 91258 transitions.
[2022-02-15 13:18:13,686 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-02-15 13:18:13,686 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27
[2022-02-15 13:18:13,686 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:13,775 INFO  L225             Difference]: With dead ends: 21148
[2022-02-15 13:18:13,775 INFO  L226             Difference]: Without dead ends: 21097
[2022-02-15 13:18:13,775 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-02-15 13:18:13,775 INFO  L933         BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:13,776 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 94 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:18:13,796 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21097 states.
[2022-02-15 13:18:14,216 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21097 to 20386.
[2022-02-15 13:18:14,242 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 20386 states, 20385 states have (on average 4.351925435369144) internal successors, (88714), 20385 states have internal predecessors, (88714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:14,310 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20386 states to 20386 states and 88714 transitions.
[2022-02-15 13:18:14,310 INFO  L78                 Accepts]: Start accepts. Automaton has 20386 states and 88714 transitions. Word has length 27
[2022-02-15 13:18:14,310 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:14,310 INFO  L470      AbstractCegarLoop]: Abstraction has 20386 states and 88714 transitions.
[2022-02-15 13:18:14,310 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:14,310 INFO  L276                IsEmpty]: Start isEmpty. Operand 20386 states and 88714 transitions.
[2022-02-15 13:18:14,351 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:18:14,351 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:14,351 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:14,367 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0
[2022-02-15 13:18:14,556 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45
[2022-02-15 13:18:14,556 INFO  L402      AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:14,556 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:14,556 INFO  L85        PathProgramCache]: Analyzing trace with hash 136448359, now seen corresponding path program 16 times
[2022-02-15 13:18:14,557 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:14,557 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977946306]
[2022-02-15 13:18:14,557 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:14,557 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:14,559 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:14,589 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:14,589 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:14,589 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977946306]
[2022-02-15 13:18:14,589 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977946306] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:14,589 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072634199]
[2022-02-15 13:18:14,589 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:18:14,589 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:14,589 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:14,592 INFO  L229       MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:14,593 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process
[2022-02-15 13:18:14,614 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:18:14,614 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:14,615 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:18:14,615 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:14,704 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:14,704 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:14,772 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:14,772 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072634199] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:14,772 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:14,772 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10
[2022-02-15 13:18:14,773 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681179297]
[2022-02-15 13:18:14,773 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:14,773 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:18:14,773 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:14,773 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:18:14,773 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:18:14,773 INFO  L87              Difference]: Start difference. First operand 20386 states and 88714 transitions. Second operand  has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:16,121 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:16,121 INFO  L93              Difference]: Finished difference Result 53500 states and 225350 transitions.
[2022-02-15 13:18:16,121 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. 
[2022-02-15 13:18:16,121 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 29
[2022-02-15 13:18:16,121 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:16,331 INFO  L225             Difference]: With dead ends: 53500
[2022-02-15 13:18:16,331 INFO  L226             Difference]: Without dead ends: 53500
[2022-02-15 13:18:16,331 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806
[2022-02-15 13:18:16,339 INFO  L933         BasicCegarLoop]: 126 mSDtfsCounter, 291 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:16,339 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 685 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 13:18:16,412 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 53500 states.
[2022-02-15 13:18:17,367 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 53500 to 19796.
[2022-02-15 13:18:17,393 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19796 states, 19795 states have (on average 4.3231624147512) internal successors, (85577), 19795 states have internal predecessors, (85577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:17,465 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19796 states to 19796 states and 85577 transitions.
[2022-02-15 13:18:17,465 INFO  L78                 Accepts]: Start accepts. Automaton has 19796 states and 85577 transitions. Word has length 29
[2022-02-15 13:18:17,466 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:17,467 INFO  L470      AbstractCegarLoop]: Abstraction has 19796 states and 85577 transitions.
[2022-02-15 13:18:17,467 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:17,467 INFO  L276                IsEmpty]: Start isEmpty. Operand 19796 states and 85577 transitions.
[2022-02-15 13:18:17,509 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:18:17,509 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:17,509 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:17,531 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0
[2022-02-15 13:18:17,724 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46
[2022-02-15 13:18:17,725 INFO  L402      AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:17,725 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:17,725 INFO  L85        PathProgramCache]: Analyzing trace with hash -1636435097, now seen corresponding path program 17 times
[2022-02-15 13:18:17,725 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:17,725 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949042007]
[2022-02-15 13:18:17,725 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:17,725 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:17,731 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:17,778 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:17,779 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:17,779 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949042007]
[2022-02-15 13:18:17,779 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949042007] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:17,779 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368058156]
[2022-02-15 13:18:17,779 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:18:17,779 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:17,779 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:17,780 INFO  L229       MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:17,781 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process
[2022-02-15 13:18:17,807 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s)
[2022-02-15 13:18:17,807 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:17,808 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:18:17,808 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:17,897 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:17,898 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:17,957 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:17,957 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [368058156] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:17,957 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:17,958 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10
[2022-02-15 13:18:17,958 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96806868]
[2022-02-15 13:18:17,958 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:17,959 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:18:17,959 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:17,959 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:18:17,959 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:18:17,959 INFO  L87              Difference]: Start difference. First operand 19796 states and 85577 transitions. Second operand  has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:18,833 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:18,834 INFO  L93              Difference]: Finished difference Result 43808 states and 178847 transitions.
[2022-02-15 13:18:18,834 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2022-02-15 13:18:18,834 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 29
[2022-02-15 13:18:18,834 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:19,069 INFO  L225             Difference]: With dead ends: 43808
[2022-02-15 13:18:19,069 INFO  L226             Difference]: Without dead ends: 43528
[2022-02-15 13:18:19,070 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 13:18:19,070 INFO  L933         BasicCegarLoop]: 41 mSDtfsCounter, 569 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:19,070 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 282 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:18:19,124 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 43528 states.
[2022-02-15 13:18:19,876 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 43528 to 24598.
[2022-02-15 13:18:19,915 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 24598 states, 24597 states have (on average 4.382323047526121) internal successors, (107792), 24597 states have internal predecessors, (107792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:20,029 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24598 states to 24598 states and 107792 transitions.
[2022-02-15 13:18:20,029 INFO  L78                 Accepts]: Start accepts. Automaton has 24598 states and 107792 transitions. Word has length 29
[2022-02-15 13:18:20,029 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:20,029 INFO  L470      AbstractCegarLoop]: Abstraction has 24598 states and 107792 transitions.
[2022-02-15 13:18:20,030 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:20,030 INFO  L276                IsEmpty]: Start isEmpty. Operand 24598 states and 107792 transitions.
[2022-02-15 13:18:20,279 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:18:20,280 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:20,280 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:20,296 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0
[2022-02-15 13:18:20,496 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47
[2022-02-15 13:18:20,496 INFO  L402      AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:20,496 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:20,496 INFO  L85        PathProgramCache]: Analyzing trace with hash -115245213, now seen corresponding path program 18 times
[2022-02-15 13:18:20,496 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:20,496 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710859969]
[2022-02-15 13:18:20,496 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:20,497 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:20,499 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:20,525 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:20,526 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:20,526 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710859969]
[2022-02-15 13:18:20,526 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710859969] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:20,526 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652883668]
[2022-02-15 13:18:20,526 INFO  L93    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-02-15 13:18:20,526 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:20,526 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:20,531 INFO  L229       MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:20,532 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process
[2022-02-15 13:18:20,558 INFO  L228   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s)
[2022-02-15 13:18:20,558 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:20,558 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:18:20,559 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:20,653 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:20,654 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:20,718 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:20,719 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [652883668] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:20,719 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:20,719 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9
[2022-02-15 13:18:20,719 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224222538]
[2022-02-15 13:18:20,719 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:20,719 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:18:20,719 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:20,719 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:18:20,719 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:18:20,720 INFO  L87              Difference]: Start difference. First operand 24598 states and 107792 transitions. Second operand  has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:21,452 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:21,452 INFO  L93              Difference]: Finished difference Result 44391 states and 182619 transitions.
[2022-02-15 13:18:21,452 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2022-02-15 13:18:21,453 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29
[2022-02-15 13:18:21,453 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:21,808 INFO  L225             Difference]: With dead ends: 44391
[2022-02-15 13:18:21,809 INFO  L226             Difference]: Without dead ends: 44391
[2022-02-15 13:18:21,809 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756
[2022-02-15 13:18:21,809 INFO  L933         BasicCegarLoop]: 42 mSDtfsCounter, 424 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:21,809 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 295 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:18:21,846 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 44391 states.
[2022-02-15 13:18:22,389 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 44391 to 24443.
[2022-02-15 13:18:22,424 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 24443 states, 24442 states have (on average 4.371900826446281) internal successors, (106858), 24442 states have internal predecessors, (106858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:22,506 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24443 states to 24443 states and 106858 transitions.
[2022-02-15 13:18:22,506 INFO  L78                 Accepts]: Start accepts. Automaton has 24443 states and 106858 transitions. Word has length 29
[2022-02-15 13:18:22,506 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:22,506 INFO  L470      AbstractCegarLoop]: Abstraction has 24443 states and 106858 transitions.
[2022-02-15 13:18:22,506 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:22,506 INFO  L276                IsEmpty]: Start isEmpty. Operand 24443 states and 106858 transitions.
[2022-02-15 13:18:22,556 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:18:22,556 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:22,556 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:22,574 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0
[2022-02-15 13:18:22,761 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48
[2022-02-15 13:18:22,762 INFO  L402      AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:22,763 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:22,763 INFO  L85        PathProgramCache]: Analyzing trace with hash 331365663, now seen corresponding path program 19 times
[2022-02-15 13:18:22,763 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:22,763 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913489241]
[2022-02-15 13:18:22,763 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:22,763 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:22,766 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:22,792 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:22,793 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:22,793 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913489241]
[2022-02-15 13:18:22,793 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913489241] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:22,793 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798412820]
[2022-02-15 13:18:22,793 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2022-02-15 13:18:22,793 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:22,793 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:22,794 INFO  L229       MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:22,795 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process
[2022-02-15 13:18:22,824 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:22,825 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:18:22,825 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:22,905 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:22,905 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:22,967 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:22,967 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798412820] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:22,967 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:22,967 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9
[2022-02-15 13:18:22,967 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872358603]
[2022-02-15 13:18:22,967 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:22,968 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:18:22,968 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:22,968 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:18:22,968 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:18:22,968 INFO  L87              Difference]: Start difference. First operand 24443 states and 106858 transitions. Second operand  has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:23,735 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:23,735 INFO  L93              Difference]: Finished difference Result 32700 states and 137404 transitions.
[2022-02-15 13:18:23,736 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2022-02-15 13:18:23,736 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29
[2022-02-15 13:18:23,736 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:23,878 INFO  L225             Difference]: With dead ends: 32700
[2022-02-15 13:18:23,879 INFO  L226             Difference]: Without dead ends: 32680
[2022-02-15 13:18:23,880 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420
[2022-02-15 13:18:23,880 INFO  L933         BasicCegarLoop]: 71 mSDtfsCounter, 221 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:23,880 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 441 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:18:23,916 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32680 states.
[2022-02-15 13:18:24,650 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32680 to 24521.
[2022-02-15 13:18:24,687 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 24521 states, 24520 states have (on average 4.369453507340946) internal successors, (107139), 24520 states have internal predecessors, (107139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:24,779 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24521 states to 24521 states and 107139 transitions.
[2022-02-15 13:18:24,779 INFO  L78                 Accepts]: Start accepts. Automaton has 24521 states and 107139 transitions. Word has length 29
[2022-02-15 13:18:24,780 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:24,780 INFO  L470      AbstractCegarLoop]: Abstraction has 24521 states and 107139 transitions.
[2022-02-15 13:18:24,780 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:24,780 INFO  L276                IsEmpty]: Start isEmpty. Operand 24521 states and 107139 transitions.
[2022-02-15 13:18:24,834 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:18:24,834 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:24,834 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:24,850 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0
[2022-02-15 13:18:25,050 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49
[2022-02-15 13:18:25,050 INFO  L402      AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:25,050 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:25,050 INFO  L85        PathProgramCache]: Analyzing trace with hash -1556022237, now seen corresponding path program 20 times
[2022-02-15 13:18:25,050 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:25,050 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986309855]
[2022-02-15 13:18:25,050 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:25,050 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:25,053 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:25,075 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:25,075 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:25,075 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986309855]
[2022-02-15 13:18:25,075 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986309855] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:25,075 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389598358]
[2022-02-15 13:18:25,075 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:18:25,076 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:25,076 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:25,077 INFO  L229       MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:25,078 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process
[2022-02-15 13:18:25,098 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:18:25,098 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:25,099 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:18:25,099 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:25,173 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:25,173 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:25,245 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:18:25,245 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [389598358] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:25,245 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:25,245 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10
[2022-02-15 13:18:25,245 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061335680]
[2022-02-15 13:18:25,245 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:25,246 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:18:25,246 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:25,246 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:18:25,246 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:18:25,246 INFO  L87              Difference]: Start difference. First operand 24521 states and 107139 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)
[2022-02-15 13:18:26,621 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:26,622 INFO  L93              Difference]: Finished difference Result 84322 states and 354953 transitions.
[2022-02-15 13:18:26,622 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2022-02-15 13:18:26,622 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 29
[2022-02-15 13:18:26,623 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:27,359 INFO  L225             Difference]: With dead ends: 84322
[2022-02-15 13:18:27,359 INFO  L226             Difference]: Without dead ends: 84322
[2022-02-15 13:18:27,359 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702
[2022-02-15 13:18:27,359 INFO  L933         BasicCegarLoop]: 39 mSDtfsCounter, 481 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:27,359 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 293 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 13:18:27,448 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 84322 states.
[2022-02-15 13:18:28,824 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 84322 to 31834.
[2022-02-15 13:18:28,872 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31834 states, 31833 states have (on average 4.49231929130148) internal successors, (143004), 31833 states have internal predecessors, (143004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:28,998 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31834 states to 31834 states and 143004 transitions.
[2022-02-15 13:18:28,999 INFO  L78                 Accepts]: Start accepts. Automaton has 31834 states and 143004 transitions. Word has length 29
[2022-02-15 13:18:28,999 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:28,999 INFO  L470      AbstractCegarLoop]: Abstraction has 31834 states and 143004 transitions.
[2022-02-15 13:18:28,999 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)
[2022-02-15 13:18:28,999 INFO  L276                IsEmpty]: Start isEmpty. Operand 31834 states and 143004 transitions.
[2022-02-15 13:18:29,072 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:18:29,073 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:29,073 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:29,090 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0
[2022-02-15 13:18:29,281 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50
[2022-02-15 13:18:29,282 INFO  L402      AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:29,282 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:29,282 INFO  L85        PathProgramCache]: Analyzing trace with hash 1231344803, now seen corresponding path program 21 times
[2022-02-15 13:18:29,282 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:29,282 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493461810]
[2022-02-15 13:18:29,283 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:29,283 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:29,285 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:29,310 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:29,310 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:29,310 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493461810]
[2022-02-15 13:18:29,310 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493461810] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:29,310 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888068761]
[2022-02-15 13:18:29,310 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:18:29,310 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:29,311 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:29,315 INFO  L229       MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:29,338 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process
[2022-02-15 13:18:29,339 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2022-02-15 13:18:29,340 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:29,340 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:18:29,340 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:29,429 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:29,429 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:29,486 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:18:29,486 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [888068761] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:29,486 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:29,487 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10
[2022-02-15 13:18:29,487 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765880720]
[2022-02-15 13:18:29,487 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:29,487 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:18:29,487 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:29,488 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:18:29,488 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:18:29,488 INFO  L87              Difference]: Start difference. First operand 31834 states and 143004 transitions. Second operand  has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:30,616 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:30,616 INFO  L93              Difference]: Finished difference Result 53630 states and 225777 transitions.
[2022-02-15 13:18:30,616 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2022-02-15 13:18:30,616 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 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 29
[2022-02-15 13:18:30,616 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:30,831 INFO  L225             Difference]: With dead ends: 53630
[2022-02-15 13:18:30,831 INFO  L226             Difference]: Without dead ends: 53574
[2022-02-15 13:18:30,831 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702
[2022-02-15 13:18:30,832 INFO  L933         BasicCegarLoop]: 79 mSDtfsCounter, 321 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:30,832 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 492 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:18:30,889 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 53574 states.
[2022-02-15 13:18:32,254 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 53574 to 31834.
[2022-02-15 13:18:32,308 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31834 states, 31833 states have (on average 4.492005151886407) internal successors, (142994), 31833 states have internal predecessors, (142994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:32,466 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31834 states to 31834 states and 142994 transitions.
[2022-02-15 13:18:32,467 INFO  L78                 Accepts]: Start accepts. Automaton has 31834 states and 142994 transitions. Word has length 29
[2022-02-15 13:18:32,467 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:32,467 INFO  L470      AbstractCegarLoop]: Abstraction has 31834 states and 142994 transitions.
[2022-02-15 13:18:32,467 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:32,467 INFO  L276                IsEmpty]: Start isEmpty. Operand 31834 states and 142994 transitions.
[2022-02-15 13:18:32,563 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:18:32,563 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:32,563 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:32,580 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0
[2022-02-15 13:18:32,774 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:32,774 INFO  L402      AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:32,775 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:32,775 INFO  L85        PathProgramCache]: Analyzing trace with hash 172392223, now seen corresponding path program 22 times
[2022-02-15 13:18:32,775 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:32,775 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034085115]
[2022-02-15 13:18:32,775 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:32,775 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:32,778 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:32,824 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:18:32,824 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:32,824 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034085115]
[2022-02-15 13:18:32,824 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034085115] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:32,825 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003692486]
[2022-02-15 13:18:32,825 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:18:32,825 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:32,825 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:32,826 INFO  L229       MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:32,828 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process
[2022-02-15 13:18:32,848 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:18:32,848 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:32,849 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:18:32,849 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:33,116 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:33,117 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:33,193 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:18:33,193 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003692486] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:33,193 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:33,193 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10
[2022-02-15 13:18:33,194 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872808236]
[2022-02-15 13:18:33,194 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:33,194 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:18:33,194 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:33,194 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:18:33,194 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:18:33,194 INFO  L87              Difference]: Start difference. First operand 31834 states and 142994 transitions. Second operand  has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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)
[2022-02-15 13:18:34,230 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:34,230 INFO  L93              Difference]: Finished difference Result 63201 states and 266555 transitions.
[2022-02-15 13:18:34,230 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2022-02-15 13:18:34,230 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 29
[2022-02-15 13:18:34,231 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:34,722 INFO  L225             Difference]: With dead ends: 63201
[2022-02-15 13:18:34,723 INFO  L226             Difference]: Without dead ends: 63201
[2022-02-15 13:18:34,723 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812
[2022-02-15 13:18:34,723 INFO  L933         BasicCegarLoop]: 65 mSDtfsCounter, 352 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:34,724 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 476 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 13:18:34,785 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 63201 states.
[2022-02-15 13:18:36,024 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 63201 to 31971.
[2022-02-15 13:18:36,084 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31971 states, 31970 states have (on average 4.490710040663122) internal successors, (143568), 31970 states have internal predecessors, (143568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:36,252 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31971 states to 31971 states and 143568 transitions.
[2022-02-15 13:18:36,253 INFO  L78                 Accepts]: Start accepts. Automaton has 31971 states and 143568 transitions. Word has length 29
[2022-02-15 13:18:36,253 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:36,253 INFO  L470      AbstractCegarLoop]: Abstraction has 31971 states and 143568 transitions.
[2022-02-15 13:18:36,253 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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)
[2022-02-15 13:18:36,253 INFO  L276                IsEmpty]: Start isEmpty. Operand 31971 states and 143568 transitions.
[2022-02-15 13:18:36,353 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:18:36,354 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:36,354 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:36,372 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0
[2022-02-15 13:18:36,570 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52
[2022-02-15 13:18:36,570 INFO  L402      AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:36,570 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:36,570 INFO  L85        PathProgramCache]: Analyzing trace with hash 619003099, now seen corresponding path program 23 times
[2022-02-15 13:18:36,570 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:36,571 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881299862]
[2022-02-15 13:18:36,571 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:36,571 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:36,573 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:36,595 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:18:36,595 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:36,595 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881299862]
[2022-02-15 13:18:36,595 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881299862] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:36,595 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242406906]
[2022-02-15 13:18:36,595 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:18:36,595 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:36,595 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:36,596 INFO  L229       MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:36,597 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process
[2022-02-15 13:18:36,621 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s)
[2022-02-15 13:18:36,621 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:36,622 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:18:36,622 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:36,713 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:36,713 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:36,762 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:18:36,762 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [242406906] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:36,762 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:36,762 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10
[2022-02-15 13:18:36,762 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363573515]
[2022-02-15 13:18:36,762 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:36,763 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:18:36,763 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:36,763 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:18:36,763 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:18:36,763 INFO  L87              Difference]: Start difference. First operand 31971 states and 143568 transitions. Second operand  has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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)
[2022-02-15 13:18:37,824 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:37,824 INFO  L93              Difference]: Finished difference Result 64043 states and 270031 transitions.
[2022-02-15 13:18:37,824 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2022-02-15 13:18:37,824 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 29
[2022-02-15 13:18:37,824 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:38,152 INFO  L225             Difference]: With dead ends: 64043
[2022-02-15 13:18:38,152 INFO  L226             Difference]: Without dead ends: 64003
[2022-02-15 13:18:38,152 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600
[2022-02-15 13:18:38,153 INFO  L933         BasicCegarLoop]: 57 mSDtfsCounter, 469 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:38,153 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 339 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:18:38,234 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 64003 states.
[2022-02-15 13:18:39,384 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 64003 to 31981.
[2022-02-15 13:18:39,434 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31981 states, 31980 states have (on average 4.49015009380863) internal successors, (143595), 31980 states have internal predecessors, (143595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:39,554 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31981 states to 31981 states and 143595 transitions.
[2022-02-15 13:18:39,554 INFO  L78                 Accepts]: Start accepts. Automaton has 31981 states and 143595 transitions. Word has length 29
[2022-02-15 13:18:39,555 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:39,555 INFO  L470      AbstractCegarLoop]: Abstraction has 31981 states and 143595 transitions.
[2022-02-15 13:18:39,555 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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)
[2022-02-15 13:18:39,555 INFO  L276                IsEmpty]: Start isEmpty. Operand 31981 states and 143595 transitions.
[2022-02-15 13:18:39,626 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:18:39,626 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:39,626 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:39,643 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0
[2022-02-15 13:18:39,829 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:39,829 INFO  L402      AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:39,829 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:39,829 INFO  L85        PathProgramCache]: Analyzing trace with hash -96354205, now seen corresponding path program 24 times
[2022-02-15 13:18:39,829 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:39,830 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833476552]
[2022-02-15 13:18:39,830 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:39,830 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:39,832 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:39,869 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:39,870 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:39,870 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833476552]
[2022-02-15 13:18:39,870 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833476552] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:39,870 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665452309]
[2022-02-15 13:18:39,870 INFO  L93    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-02-15 13:18:39,870 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:39,870 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:39,876 INFO  L229       MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:39,877 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process
[2022-02-15 13:18:39,900 INFO  L228   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s)
[2022-02-15 13:18:39,900 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:39,901 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:18:39,901 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:40,001 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:40,001 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:40,077 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:40,078 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665452309] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:40,078 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:40,078 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11
[2022-02-15 13:18:40,078 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719083034]
[2022-02-15 13:18:40,078 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:40,078 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-02-15 13:18:40,078 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:40,078 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-02-15 13:18:40,079 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132
[2022-02-15 13:18:40,079 INFO  L87              Difference]: Start difference. First operand 31981 states and 143595 transitions. Second operand  has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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)
[2022-02-15 13:18:41,257 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:41,257 INFO  L93              Difference]: Finished difference Result 53971 states and 230205 transitions.
[2022-02-15 13:18:41,259 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2022-02-15 13:18:41,259 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 29
[2022-02-15 13:18:41,259 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:41,726 INFO  L225             Difference]: With dead ends: 53971
[2022-02-15 13:18:41,727 INFO  L226             Difference]: Without dead ends: 53971
[2022-02-15 13:18:41,727 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 13:18:41,732 INFO  L933         BasicCegarLoop]: 58 mSDtfsCounter, 415 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:41,732 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 404 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 13:18:41,790 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 53971 states.
[2022-02-15 13:18:42,687 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 53971 to 30565.
[2022-02-15 13:18:42,735 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30565 states, 30564 states have (on average 4.463290145268944) internal successors, (136416), 30564 states have internal predecessors, (136416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:42,869 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30565 states to 30565 states and 136416 transitions.
[2022-02-15 13:18:42,869 INFO  L78                 Accepts]: Start accepts. Automaton has 30565 states and 136416 transitions. Word has length 29
[2022-02-15 13:18:42,869 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:42,869 INFO  L470      AbstractCegarLoop]: Abstraction has 30565 states and 136416 transitions.
[2022-02-15 13:18:42,869 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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)
[2022-02-15 13:18:42,869 INFO  L276                IsEmpty]: Start isEmpty. Operand 30565 states and 136416 transitions.
[2022-02-15 13:18:42,947 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:18:42,948 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:42,948 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:42,964 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0
[2022-02-15 13:18:43,163 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:43,164 INFO  L402      AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:43,164 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:43,164 INFO  L85        PathProgramCache]: Analyzing trace with hash -1931600191, now seen corresponding path program 25 times
[2022-02-15 13:18:43,164 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:43,164 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720630368]
[2022-02-15 13:18:43,164 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:43,164 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:43,166 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:43,194 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:43,195 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:43,195 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720630368]
[2022-02-15 13:18:43,195 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720630368] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:43,195 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451929180]
[2022-02-15 13:18:43,195 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2022-02-15 13:18:43,195 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:43,195 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:43,196 INFO  L229       MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:43,200 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process
[2022-02-15 13:18:43,225 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:43,226 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:18:43,226 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:43,305 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:43,306 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:43,352 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:43,352 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451929180] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:43,353 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:43,353 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11
[2022-02-15 13:18:43,353 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125935697]
[2022-02-15 13:18:43,353 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:43,353 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-02-15 13:18:43,353 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:43,353 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-02-15 13:18:43,353 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132
[2022-02-15 13:18:43,353 INFO  L87              Difference]: Start difference. First operand 30565 states and 136416 transitions. Second operand  has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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)
[2022-02-15 13:18:44,277 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:44,278 INFO  L93              Difference]: Finished difference Result 54874 states and 230950 transitions.
[2022-02-15 13:18:44,278 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2022-02-15 13:18:44,278 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 29
[2022-02-15 13:18:44,278 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:44,488 INFO  L225             Difference]: With dead ends: 54874
[2022-02-15 13:18:44,488 INFO  L226             Difference]: Without dead ends: 54814
[2022-02-15 13:18:44,488 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756
[2022-02-15 13:18:44,488 INFO  L933         BasicCegarLoop]: 54 mSDtfsCounter, 443 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:44,489 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 390 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 13:18:44,819 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54814 states.
[2022-02-15 13:18:45,593 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54814 to 30989.
[2022-02-15 13:18:45,641 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30989 states, 30988 states have (on average 4.461081709048664) internal successors, (138240), 30988 states have internal predecessors, (138240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:45,767 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30989 states to 30989 states and 138240 transitions.
[2022-02-15 13:18:45,767 INFO  L78                 Accepts]: Start accepts. Automaton has 30989 states and 138240 transitions. Word has length 29
[2022-02-15 13:18:45,767 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:45,767 INFO  L470      AbstractCegarLoop]: Abstraction has 30989 states and 138240 transitions.
[2022-02-15 13:18:45,768 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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)
[2022-02-15 13:18:45,768 INFO  L276                IsEmpty]: Start isEmpty. Operand 30989 states and 138240 transitions.
[2022-02-15 13:18:45,840 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:18:45,840 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:45,840 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:45,856 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0
[2022-02-15 13:18:46,055 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55
[2022-02-15 13:18:46,055 INFO  L402      AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:46,056 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:46,056 INFO  L85        PathProgramCache]: Analyzing trace with hash -1226629401, now seen corresponding path program 26 times
[2022-02-15 13:18:46,056 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:46,056 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555970505]
[2022-02-15 13:18:46,056 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:46,056 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:46,058 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:46,083 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:46,083 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:46,083 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555970505]
[2022-02-15 13:18:46,083 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555970505] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:46,083 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125940248]
[2022-02-15 13:18:46,083 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:18:46,083 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:46,084 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:46,084 INFO  L229       MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:46,085 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process
[2022-02-15 13:18:46,106 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:18:46,106 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:46,106 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:18:46,107 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:46,378 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:46,378 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:46,462 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:18:46,463 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125940248] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:46,463 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:46,463 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11
[2022-02-15 13:18:46,463 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108870636]
[2022-02-15 13:18:46,463 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:46,463 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-02-15 13:18:46,463 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:46,463 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-02-15 13:18:46,463 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132
[2022-02-15 13:18:46,464 INFO  L87              Difference]: Start difference. First operand 30989 states and 138240 transitions. Second operand  has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:47,818 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:47,818 INFO  L93              Difference]: Finished difference Result 67378 states and 285832 transitions.
[2022-02-15 13:18:47,818 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2022-02-15 13:18:47,819 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 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 29
[2022-02-15 13:18:47,819 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:48,199 INFO  L225             Difference]: With dead ends: 67378
[2022-02-15 13:18:48,199 INFO  L226             Difference]: Without dead ends: 67378
[2022-02-15 13:18:48,199 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 13:18:48,200 INFO  L933         BasicCegarLoop]: 54 mSDtfsCounter, 535 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:48,200 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 346 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:18:48,279 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 67378 states.
[2022-02-15 13:18:49,408 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 67378 to 29898.
[2022-02-15 13:18:49,457 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 29898 states, 29897 states have (on average 4.434090376960899) internal successors, (132566), 29897 states have internal predecessors, (132566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:49,792 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 29898 states to 29898 states and 132566 transitions.
[2022-02-15 13:18:49,792 INFO  L78                 Accepts]: Start accepts. Automaton has 29898 states and 132566 transitions. Word has length 29
[2022-02-15 13:18:49,792 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:49,793 INFO  L470      AbstractCegarLoop]: Abstraction has 29898 states and 132566 transitions.
[2022-02-15 13:18:49,793 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:49,793 INFO  L276                IsEmpty]: Start isEmpty. Operand 29898 states and 132566 transitions.
[2022-02-15 13:18:49,881 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:18:49,881 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:49,881 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:49,898 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0
[2022-02-15 13:18:50,082 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56
[2022-02-15 13:18:50,082 INFO  L402      AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:50,082 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:50,083 INFO  L85        PathProgramCache]: Analyzing trace with hash 1668470631, now seen corresponding path program 27 times
[2022-02-15 13:18:50,083 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:50,083 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116977887]
[2022-02-15 13:18:50,083 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:50,083 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:50,085 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:50,116 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:50,116 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:50,116 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116977887]
[2022-02-15 13:18:50,116 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116977887] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:50,116 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024323539]
[2022-02-15 13:18:50,117 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:18:50,117 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:50,117 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:50,118 INFO  L229       MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:50,119 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process
[2022-02-15 13:18:50,141 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2022-02-15 13:18:50,141 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:50,141 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:18:50,142 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:50,225 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:50,225 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:50,273 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:18:50,274 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024323539] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:50,274 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:50,274 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11
[2022-02-15 13:18:50,274 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311770476]
[2022-02-15 13:18:50,274 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:50,275 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-02-15 13:18:50,275 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:50,276 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-02-15 13:18:50,276 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132
[2022-02-15 13:18:50,276 INFO  L87              Difference]: Start difference. First operand 29898 states and 132566 transitions. Second operand  has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:51,295 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:51,295 INFO  L93              Difference]: Finished difference Result 44092 states and 184185 transitions.
[2022-02-15 13:18:51,295 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2022-02-15 13:18:51,296 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29
[2022-02-15 13:18:51,296 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:51,515 INFO  L225             Difference]: With dead ends: 44092
[2022-02-15 13:18:51,515 INFO  L226             Difference]: Without dead ends: 44008
[2022-02-15 13:18:51,515 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756
[2022-02-15 13:18:51,515 INFO  L933         BasicCegarLoop]: 52 mSDtfsCounter, 350 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:51,516 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 469 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:18:51,569 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 44008 states.
[2022-02-15 13:18:52,398 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 44008 to 28760.
[2022-02-15 13:18:52,447 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 28760 states, 28759 states have (on average 4.440905455683438) internal successors, (127716), 28759 states have internal predecessors, (127716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:52,589 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28760 states to 28760 states and 127716 transitions.
[2022-02-15 13:18:52,589 INFO  L78                 Accepts]: Start accepts. Automaton has 28760 states and 127716 transitions. Word has length 29
[2022-02-15 13:18:52,589 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:52,589 INFO  L470      AbstractCegarLoop]: Abstraction has 28760 states and 127716 transitions.
[2022-02-15 13:18:52,589 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:52,589 INFO  L276                IsEmpty]: Start isEmpty. Operand 28760 states and 127716 transitions.
[2022-02-15 13:18:52,682 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:18:52,683 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:52,683 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:52,699 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0
[2022-02-15 13:18:52,883 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57
[2022-02-15 13:18:52,883 INFO  L402      AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:52,884 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:52,884 INFO  L85        PathProgramCache]: Analyzing trace with hash 1199527587, now seen corresponding path program 28 times
[2022-02-15 13:18:52,884 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:52,884 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846073136]
[2022-02-15 13:18:52,884 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:52,884 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:52,887 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:52,917 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:52,917 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:52,917 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846073136]
[2022-02-15 13:18:52,917 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846073136] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:52,917 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855211061]
[2022-02-15 13:18:52,917 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:18:52,917 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:52,917 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:52,918 INFO  L229       MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:52,919 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process
[2022-02-15 13:18:52,938 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:18:52,939 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:52,939 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:18:52,939 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:53,029 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:53,030 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:53,086 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:18:53,086 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [855211061] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:53,086 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:53,086 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9
[2022-02-15 13:18:53,086 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427243332]
[2022-02-15 13:18:53,086 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:53,086 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:18:53,087 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:53,087 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:18:53,087 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:18:53,087 INFO  L87              Difference]: Start difference. First operand 28760 states and 127716 transitions. Second operand  has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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)
[2022-02-15 13:18:54,097 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:54,097 INFO  L93              Difference]: Finished difference Result 60388 states and 252684 transitions.
[2022-02-15 13:18:54,097 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2022-02-15 13:18:54,097 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 29
[2022-02-15 13:18:54,098 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:54,582 INFO  L225             Difference]: With dead ends: 60388
[2022-02-15 13:18:54,582 INFO  L226             Difference]: Without dead ends: 60388
[2022-02-15 13:18:54,582 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756
[2022-02-15 13:18:54,582 INFO  L933         BasicCegarLoop]: 37 mSDtfsCounter, 535 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:54,583 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 232 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 13:18:54,638 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 60388 states.
[2022-02-15 13:18:55,619 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 60388 to 30620.
[2022-02-15 13:18:55,671 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30620 states, 30619 states have (on average 4.473431529442503) internal successors, (136972), 30619 states have internal predecessors, (136972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:55,821 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30620 states to 30620 states and 136972 transitions.
[2022-02-15 13:18:55,821 INFO  L78                 Accepts]: Start accepts. Automaton has 30620 states and 136972 transitions. Word has length 29
[2022-02-15 13:18:55,821 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:55,821 INFO  L470      AbstractCegarLoop]: Abstraction has 30620 states and 136972 transitions.
[2022-02-15 13:18:55,822 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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)
[2022-02-15 13:18:55,822 INFO  L276                IsEmpty]: Start isEmpty. Operand 30620 states and 136972 transitions.
[2022-02-15 13:18:56,146 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:18:56,146 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:56,146 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:56,175 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0
[2022-02-15 13:18:56,362 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58
[2022-02-15 13:18:56,362 INFO  L402      AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:56,363 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:56,363 INFO  L85        PathProgramCache]: Analyzing trace with hash -308072669, now seen corresponding path program 29 times
[2022-02-15 13:18:56,363 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:56,363 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859631173]
[2022-02-15 13:18:56,363 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:56,363 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:56,365 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:56,389 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:56,389 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:56,389 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859631173]
[2022-02-15 13:18:56,389 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859631173] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:56,389 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73850097]
[2022-02-15 13:18:56,389 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:18:56,390 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:56,390 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:56,391 INFO  L229       MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:56,391 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process
[2022-02-15 13:18:56,414 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s)
[2022-02-15 13:18:56,415 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:56,415 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:18:56,416 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:56,503 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:56,504 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:56,564 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:18:56,564 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [73850097] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:56,564 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:56,564 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9
[2022-02-15 13:18:56,564 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742849050]
[2022-02-15 13:18:56,564 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:56,564 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:18:56,564 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:56,564 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:18:56,565 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:18:56,565 INFO  L87              Difference]: Start difference. First operand 30620 states and 136972 transitions. Second operand  has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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)
[2022-02-15 13:18:57,197 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:18:57,197 INFO  L93              Difference]: Finished difference Result 41767 states and 177773 transitions.
[2022-02-15 13:18:57,198 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2022-02-15 13:18:57,198 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 29
[2022-02-15 13:18:57,198 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:18:57,394 INFO  L225             Difference]: With dead ends: 41767
[2022-02-15 13:18:57,395 INFO  L226             Difference]: Without dead ends: 41739
[2022-02-15 13:18:57,395 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462
[2022-02-15 13:18:57,395 INFO  L933         BasicCegarLoop]: 77 mSDtfsCounter, 224 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:18:57,395 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 380 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:18:57,454 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 41739 states.
[2022-02-15 13:18:58,396 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 41739 to 30609.
[2022-02-15 13:18:58,443 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30609 states, 30608 states have (on average 4.473078933612127) internal successors, (136912), 30608 states have internal predecessors, (136912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:18:58,565 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30609 states to 30609 states and 136912 transitions.
[2022-02-15 13:18:58,566 INFO  L78                 Accepts]: Start accepts. Automaton has 30609 states and 136912 transitions. Word has length 29
[2022-02-15 13:18:58,566 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:18:58,566 INFO  L470      AbstractCegarLoop]: Abstraction has 30609 states and 136912 transitions.
[2022-02-15 13:18:58,566 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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)
[2022-02-15 13:18:58,566 INFO  L276                IsEmpty]: Start isEmpty. Operand 30609 states and 136912 transitions.
[2022-02-15 13:18:58,640 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:18:58,641 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:18:58,641 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:18:58,659 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0
[2022-02-15 13:18:58,856 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59
[2022-02-15 13:18:58,857 INFO  L402      AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:18:58,857 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:18:58,857 INFO  L85        PathProgramCache]: Analyzing trace with hash -1367025249, now seen corresponding path program 30 times
[2022-02-15 13:18:58,857 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:18:58,857 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100533128]
[2022-02-15 13:18:58,857 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:18:58,857 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:18:58,860 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:18:58,891 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:58,891 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:18:58,891 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100533128]
[2022-02-15 13:18:58,891 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100533128] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:18:58,891 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675989482]
[2022-02-15 13:18:58,891 INFO  L93    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-02-15 13:18:58,892 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:18:58,892 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:18:58,893 INFO  L229       MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:18:58,896 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process
[2022-02-15 13:18:58,916 INFO  L228   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s)
[2022-02-15 13:18:58,916 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:18:58,916 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:18:58,917 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:18:59,002 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:18:59,002 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:18:59,064 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:18:59,064 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675989482] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:18:59,064 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:18:59,064 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9
[2022-02-15 13:18:59,064 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285953555]
[2022-02-15 13:18:59,064 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:18:59,064 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:18:59,064 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:18:59,065 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:18:59,065 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:18:59,065 INFO  L87              Difference]: Start difference. First operand 30609 states and 136912 transitions. Second operand  has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:00,053 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:19:00,054 INFO  L93              Difference]: Finished difference Result 47385 states and 201554 transitions.
[2022-02-15 13:19:00,054 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2022-02-15 13:19:00,054 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 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 29
[2022-02-15 13:19:00,054 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:19:00,325 INFO  L225             Difference]: With dead ends: 47385
[2022-02-15 13:19:00,325 INFO  L226             Difference]: Without dead ends: 47385
[2022-02-15 13:19:00,326 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650
[2022-02-15 13:19:00,326 INFO  L933         BasicCegarLoop]: 75 mSDtfsCounter, 279 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:19:00,326 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 383 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:19:00,389 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 47385 states.
[2022-02-15 13:19:01,645 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 47385 to 30746.
[2022-02-15 13:19:01,693 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30746 states, 30745 states have (on average 4.471816555537486) internal successors, (137486), 30745 states have internal predecessors, (137486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:01,859 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30746 states to 30746 states and 137486 transitions.
[2022-02-15 13:19:01,860 INFO  L78                 Accepts]: Start accepts. Automaton has 30746 states and 137486 transitions. Word has length 29
[2022-02-15 13:19:01,860 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:19:01,860 INFO  L470      AbstractCegarLoop]: Abstraction has 30746 states and 137486 transitions.
[2022-02-15 13:19:01,860 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:01,860 INFO  L276                IsEmpty]: Start isEmpty. Operand 30746 states and 137486 transitions.
[2022-02-15 13:19:01,962 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:19:01,962 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:19:01,962 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:19:01,986 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0
[2022-02-15 13:19:02,163 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:02,163 INFO  L402      AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:19:02,163 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:19:02,163 INFO  L85        PathProgramCache]: Analyzing trace with hash -920414373, now seen corresponding path program 31 times
[2022-02-15 13:19:02,163 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:19:02,163 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950199400]
[2022-02-15 13:19:02,163 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:19:02,164 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:19:02,166 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:19:02,193 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:02,193 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:19:02,193 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950199400]
[2022-02-15 13:19:02,193 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950199400] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:19:02,193 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274931440]
[2022-02-15 13:19:02,193 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2022-02-15 13:19:02,194 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:02,194 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:19:02,194 INFO  L229       MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:19:02,196 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process
[2022-02-15 13:19:02,216 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:19:02,217 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:19:02,217 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:19:02,291 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:02,291 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:19:02,348 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:19:02,348 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [274931440] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:19:02,348 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:19:02,348 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9
[2022-02-15 13:19:02,349 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671056805]
[2022-02-15 13:19:02,349 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:19:02,349 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:19:02,349 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:19:02,349 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:19:02,349 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:19:02,349 INFO  L87              Difference]: Start difference. First operand 30746 states and 137486 transitions. Second operand  has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:03,323 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:19:03,323 INFO  L93              Difference]: Finished difference Result 57968 states and 241203 transitions.
[2022-02-15 13:19:03,323 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2022-02-15 13:19:03,324 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 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 29
[2022-02-15 13:19:03,324 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:19:03,600 INFO  L225             Difference]: With dead ends: 57968
[2022-02-15 13:19:03,600 INFO  L226             Difference]: Without dead ends: 57948
[2022-02-15 13:19:03,600 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812
[2022-02-15 13:19:03,601 INFO  L933         BasicCegarLoop]: 54 mSDtfsCounter, 523 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:19:03,601 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 289 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:19:03,676 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57948 states.
[2022-02-15 13:19:04,824 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57948 to 30746.
[2022-02-15 13:19:04,871 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30746 states, 30745 states have (on average 4.471491299398276) internal successors, (137476), 30745 states have internal predecessors, (137476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:05,011 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30746 states to 30746 states and 137476 transitions.
[2022-02-15 13:19:05,012 INFO  L78                 Accepts]: Start accepts. Automaton has 30746 states and 137476 transitions. Word has length 29
[2022-02-15 13:19:05,012 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:19:05,012 INFO  L470      AbstractCegarLoop]: Abstraction has 30746 states and 137476 transitions.
[2022-02-15 13:19:05,012 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:05,012 INFO  L276                IsEmpty]: Start isEmpty. Operand 30746 states and 137476 transitions.
[2022-02-15 13:19:05,102 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:19:05,102 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:19:05,102 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:19:05,119 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0
[2022-02-15 13:19:05,315 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:05,316 INFO  L402      AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:19:05,316 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:19:05,316 INFO  L85        PathProgramCache]: Analyzing trace with hash -1635771677, now seen corresponding path program 32 times
[2022-02-15 13:19:05,316 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:19:05,316 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155391154]
[2022-02-15 13:19:05,316 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:19:05,316 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:19:05,319 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:19:05,348 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:19:05,348 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:19:05,348 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155391154]
[2022-02-15 13:19:05,348 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155391154] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:19:05,348 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791598317]
[2022-02-15 13:19:05,348 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:19:05,349 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:05,349 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:19:05,350 INFO  L229       MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:19:05,351 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process
[2022-02-15 13:19:05,375 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:19:05,376 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:19:05,376 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:19:05,377 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:19:05,464 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:05,464 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:19:05,530 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:19:05,530 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [791598317] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:19:05,530 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:19:05,530 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10
[2022-02-15 13:19:05,531 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055500908]
[2022-02-15 13:19:05,531 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:19:05,531 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:19:05,531 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:19:05,531 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:19:05,531 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:19:05,531 INFO  L87              Difference]: Start difference. First operand 30746 states and 137476 transitions. Second operand  has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:07,217 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:19:07,218 INFO  L93              Difference]: Finished difference Result 66647 states and 285464 transitions.
[2022-02-15 13:19:07,218 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. 
[2022-02-15 13:19:07,218 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 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 29
[2022-02-15 13:19:07,218 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:19:07,519 INFO  L225             Difference]: With dead ends: 66647
[2022-02-15 13:19:07,519 INFO  L226             Difference]: Without dead ends: 66647
[2022-02-15 13:19:07,519 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=565, Invalid=2191, Unknown=0, NotChecked=0, Total=2756
[2022-02-15 13:19:07,520 INFO  L933         BasicCegarLoop]: 105 mSDtfsCounter, 427 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 13:19:07,521 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 758 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 13:19:07,798 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 66647 states.
[2022-02-15 13:19:08,858 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 66647 to 31294.
[2022-02-15 13:19:08,908 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31294 states, 31293 states have (on average 4.46655801616975) internal successors, (139772), 31293 states have internal predecessors, (139772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:09,059 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31294 states to 31294 states and 139772 transitions.
[2022-02-15 13:19:09,059 INFO  L78                 Accepts]: Start accepts. Automaton has 31294 states and 139772 transitions. Word has length 29
[2022-02-15 13:19:09,059 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:19:09,059 INFO  L470      AbstractCegarLoop]: Abstraction has 31294 states and 139772 transitions.
[2022-02-15 13:19:09,059 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:09,059 INFO  L276                IsEmpty]: Start isEmpty. Operand 31294 states and 139772 transitions.
[2022-02-15 13:19:09,158 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:19:09,159 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:19:09,159 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:19:09,183 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0
[2022-02-15 13:19:09,360 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:09,361 INFO  L402      AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:19:09,361 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:19:09,361 INFO  L85        PathProgramCache]: Analyzing trace with hash 823949633, now seen corresponding path program 33 times
[2022-02-15 13:19:09,361 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:19:09,361 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365666696]
[2022-02-15 13:19:09,361 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:19:09,361 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:19:09,364 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:19:09,385 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:19:09,386 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:19:09,386 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365666696]
[2022-02-15 13:19:09,386 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365666696] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:19:09,386 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844134961]
[2022-02-15 13:19:09,386 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:19:09,386 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:09,386 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:19:09,388 INFO  L229       MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:19:09,389 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process
[2022-02-15 13:19:09,414 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2022-02-15 13:19:09,414 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:19:09,415 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:19:09,415 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:19:09,865 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:09,865 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:19:09,908 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:19:09,909 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844134961] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:19:09,909 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:19:09,909 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10
[2022-02-15 13:19:09,909 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2313642]
[2022-02-15 13:19:09,909 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:19:09,910 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:19:09,910 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:19:09,912 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:19:09,912 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:19:09,913 INFO  L87              Difference]: Start difference. First operand 31294 states and 139772 transitions. Second operand  has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:10,983 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:19:10,983 INFO  L93              Difference]: Finished difference Result 67722 states and 279320 transitions.
[2022-02-15 13:19:10,984 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. 
[2022-02-15 13:19:10,984 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 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 29
[2022-02-15 13:19:10,984 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:19:11,739 INFO  L225             Difference]: With dead ends: 67722
[2022-02-15 13:19:11,739 INFO  L226             Difference]: Without dead ends: 67522
[2022-02-15 13:19:11,739 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 13:19:11,739 INFO  L933         BasicCegarLoop]: 61 mSDtfsCounter, 584 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:19:11,746 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 383 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:19:11,827 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 67522 states.
[2022-02-15 13:19:12,877 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 67522 to 31300.
[2022-02-15 13:19:12,926 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31300 states, 31299 states have (on average 4.465414230486597) internal successors, (139763), 31299 states have internal predecessors, (139763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:13,238 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31300 states to 31300 states and 139763 transitions.
[2022-02-15 13:19:13,239 INFO  L78                 Accepts]: Start accepts. Automaton has 31300 states and 139763 transitions. Word has length 29
[2022-02-15 13:19:13,240 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:19:13,240 INFO  L470      AbstractCegarLoop]: Abstraction has 31300 states and 139763 transitions.
[2022-02-15 13:19:13,240 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:13,240 INFO  L276                IsEmpty]: Start isEmpty. Operand 31300 states and 139763 transitions.
[2022-02-15 13:19:13,331 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:19:13,331 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:19:13,332 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:19:13,347 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0
[2022-02-15 13:19:13,547 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:13,547 INFO  L402      AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:19:13,548 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:19:13,548 INFO  L85        PathProgramCache]: Analyzing trace with hash -1685460577, now seen corresponding path program 34 times
[2022-02-15 13:19:13,548 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:19:13,548 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377391794]
[2022-02-15 13:19:13,548 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:19:13,548 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:19:13,552 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:19:13,620 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:13,620 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:19:13,620 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377391794]
[2022-02-15 13:19:13,620 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377391794] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:19:13,620 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474155445]
[2022-02-15 13:19:13,620 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:19:13,620 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:13,620 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:19:13,622 INFO  L229       MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:19:13,623 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process
[2022-02-15 13:19:13,642 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:19:13,642 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:19:13,643 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:19:13,643 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:19:13,723 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:13,723 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:19:13,786 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:13,786 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474155445] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:19:13,786 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:19:13,786 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10
[2022-02-15 13:19:13,786 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893383783]
[2022-02-15 13:19:13,786 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:19:13,786 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:19:13,787 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:19:13,787 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:19:13,787 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:19:13,787 INFO  L87              Difference]: Start difference. First operand 31300 states and 139763 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)
[2022-02-15 13:19:15,125 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:19:15,125 INFO  L93              Difference]: Finished difference Result 57331 states and 248639 transitions.
[2022-02-15 13:19:15,126 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. 
[2022-02-15 13:19:15,126 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 29
[2022-02-15 13:19:15,126 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:19:15,394 INFO  L225             Difference]: With dead ends: 57331
[2022-02-15 13:19:15,394 INFO  L226             Difference]: Without dead ends: 57311
[2022-02-15 13:19:15,395 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806
[2022-02-15 13:19:15,395 INFO  L933         BasicCegarLoop]: 117 mSDtfsCounter, 261 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:19:15,395 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 611 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:19:15,466 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57311 states.
[2022-02-15 13:19:16,607 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57311 to 31991.
[2022-02-15 13:19:16,665 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31991 states, 31990 states have (on average 4.448671459831197) internal successors, (142313), 31990 states have internal predecessors, (142313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:16,826 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31991 states to 31991 states and 142313 transitions.
[2022-02-15 13:19:16,827 INFO  L78                 Accepts]: Start accepts. Automaton has 31991 states and 142313 transitions. Word has length 29
[2022-02-15 13:19:16,827 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:19:16,827 INFO  L470      AbstractCegarLoop]: Abstraction has 31991 states and 142313 transitions.
[2022-02-15 13:19:16,827 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)
[2022-02-15 13:19:16,827 INFO  L276                IsEmpty]: Start isEmpty. Operand 31991 states and 142313 transitions.
[2022-02-15 13:19:16,902 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:19:16,902 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:19:16,902 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:19:16,921 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0
[2022-02-15 13:19:17,118 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64
[2022-02-15 13:19:17,118 INFO  L402      AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:19:17,118 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:19:17,119 INFO  L85        PathProgramCache]: Analyzing trace with hash 620018621, now seen corresponding path program 35 times
[2022-02-15 13:19:17,119 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:19:17,119 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606858242]
[2022-02-15 13:19:17,119 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:19:17,119 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:19:17,121 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:19:17,152 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:17,152 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:19:17,152 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606858242]
[2022-02-15 13:19:17,152 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606858242] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:19:17,152 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356810868]
[2022-02-15 13:19:17,152 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:19:17,152 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:17,152 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:19:17,153 INFO  L229       MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:19:17,154 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process
[2022-02-15 13:19:17,175 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s)
[2022-02-15 13:19:17,175 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:19:17,175 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:19:17,176 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:19:17,255 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:17,255 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:19:17,318 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:17,319 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356810868] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:19:17,319 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:19:17,319 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10
[2022-02-15 13:19:17,319 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292567394]
[2022-02-15 13:19:17,319 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:19:17,319 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:19:17,319 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:19:17,319 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:19:17,319 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:19:17,319 INFO  L87              Difference]: Start difference. First operand 31991 states and 142313 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)
[2022-02-15 13:19:18,257 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:19:18,258 INFO  L93              Difference]: Finished difference Result 56534 states and 233979 transitions.
[2022-02-15 13:19:18,258 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2022-02-15 13:19:18,258 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 29
[2022-02-15 13:19:18,258 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:19:18,505 INFO  L225             Difference]: With dead ends: 56534
[2022-02-15 13:19:18,505 INFO  L226             Difference]: Without dead ends: 56434
[2022-02-15 13:19:18,506 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 13:19:18,506 INFO  L933         BasicCegarLoop]: 37 mSDtfsCounter, 545 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:19:18,506 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 338 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:19:18,575 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 56434 states.
[2022-02-15 13:19:19,676 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 56434 to 32469.
[2022-02-15 13:19:19,727 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 32469 states, 32468 states have (on average 4.436368116299125) internal successors, (144040), 32468 states have internal predecessors, (144040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:19,871 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32469 states to 32469 states and 144040 transitions.
[2022-02-15 13:19:19,871 INFO  L78                 Accepts]: Start accepts. Automaton has 32469 states and 144040 transitions. Word has length 29
[2022-02-15 13:19:19,871 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:19:19,871 INFO  L470      AbstractCegarLoop]: Abstraction has 32469 states and 144040 transitions.
[2022-02-15 13:19:19,871 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)
[2022-02-15 13:19:19,872 INFO  L276                IsEmpty]: Start isEmpty. Operand 32469 states and 144040 transitions.
[2022-02-15 13:19:19,957 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:19:19,957 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:19:19,957 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:19:19,976 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0
[2022-02-15 13:19:20,158 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65
[2022-02-15 13:19:20,158 INFO  L402      AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:19:20,158 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:19:20,158 INFO  L85        PathProgramCache]: Analyzing trace with hash 1534820831, now seen corresponding path program 16 times
[2022-02-15 13:19:20,158 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:19:20,158 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596948232]
[2022-02-15 13:19:20,158 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:19:20,158 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:19:20,161 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:19:20,191 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:20,191 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:19:20,191 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596948232]
[2022-02-15 13:19:20,191 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596948232] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:19:20,191 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531901780]
[2022-02-15 13:19:20,191 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:19:20,191 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:20,191 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:19:20,192 INFO  L229       MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:19:20,193 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process
[2022-02-15 13:19:20,212 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:19:20,212 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:19:20,213 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:19:20,213 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:19:20,291 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:20,292 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:19:20,346 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:20,346 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [531901780] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:19:20,346 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:19:20,346 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10
[2022-02-15 13:19:20,346 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831692463]
[2022-02-15 13:19:20,346 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:19:20,346 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:19:20,347 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:19:20,347 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:19:20,347 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:19:20,347 INFO  L87              Difference]: Start difference. First operand 32469 states and 144040 transitions. Second operand  has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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)
[2022-02-15 13:19:21,983 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:19:21,983 INFO  L93              Difference]: Finished difference Result 80270 states and 344343 transitions.
[2022-02-15 13:19:21,983 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. 
[2022-02-15 13:19:21,984 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 29
[2022-02-15 13:19:21,984 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:19:22,610 INFO  L225             Difference]: With dead ends: 80270
[2022-02-15 13:19:22,610 INFO  L226             Difference]: Without dead ends: 80270
[2022-02-15 13:19:22,611 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806
[2022-02-15 13:19:22,617 INFO  L933         BasicCegarLoop]: 126 mSDtfsCounter, 255 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 13:19:22,618 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 701 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 13:19:22,721 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 80270 states.
[2022-02-15 13:19:24,130 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 80270 to 31572.
[2022-02-15 13:19:24,174 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31572 states, 31571 states have (on average 4.398910392448767) internal successors, (138878), 31571 states have internal predecessors, (138878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:24,328 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31572 states to 31572 states and 138878 transitions.
[2022-02-15 13:19:24,329 INFO  L78                 Accepts]: Start accepts. Automaton has 31572 states and 138878 transitions. Word has length 29
[2022-02-15 13:19:24,329 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:19:24,329 INFO  L470      AbstractCegarLoop]: Abstraction has 31572 states and 138878 transitions.
[2022-02-15 13:19:24,329 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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)
[2022-02-15 13:19:24,329 INFO  L276                IsEmpty]: Start isEmpty. Operand 31572 states and 138878 transitions.
[2022-02-15 13:19:24,421 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:19:24,422 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:19:24,422 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:19:24,438 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0
[2022-02-15 13:19:24,622 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66
[2022-02-15 13:19:24,622 INFO  L402      AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:19:24,623 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:19:24,623 INFO  L85        PathProgramCache]: Analyzing trace with hash 285954147, now seen corresponding path program 17 times
[2022-02-15 13:19:24,623 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:19:24,623 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124047372]
[2022-02-15 13:19:24,623 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:19:24,623 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:19:24,626 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:19:24,665 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:24,665 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:19:24,665 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124047372]
[2022-02-15 13:19:24,665 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124047372] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:19:24,665 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418117440]
[2022-02-15 13:19:24,665 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:19:24,665 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:24,665 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:19:24,672 INFO  L229       MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:19:24,694 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process
[2022-02-15 13:19:24,703 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s)
[2022-02-15 13:19:24,703 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:19:24,704 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:19:24,704 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:19:24,780 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:24,780 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:19:24,837 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:24,838 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [418117440] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:19:24,838 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:19:24,838 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10
[2022-02-15 13:19:24,838 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901281569]
[2022-02-15 13:19:24,838 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:19:24,838 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:19:24,838 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:19:24,838 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:19:24,838 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:19:24,838 INFO  L87              Difference]: Start difference. First operand 31572 states and 138878 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)
[2022-02-15 13:19:25,968 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:19:25,969 INFO  L93              Difference]: Finished difference Result 65127 states and 271613 transitions.
[2022-02-15 13:19:25,969 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2022-02-15 13:19:25,969 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 29
[2022-02-15 13:19:25,969 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:19:26,249 INFO  L225             Difference]: With dead ends: 65127
[2022-02-15 13:19:26,249 INFO  L226             Difference]: Without dead ends: 64887
[2022-02-15 13:19:26,250 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 13:19:26,250 INFO  L933         BasicCegarLoop]: 45 mSDtfsCounter, 455 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:19:26,251 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 316 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:19:26,345 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 64887 states.
[2022-02-15 13:19:27,545 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 64887 to 39278.
[2022-02-15 13:19:27,611 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 39278 states, 39277 states have (on average 4.461567838684217) internal successors, (175237), 39277 states have internal predecessors, (175237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:27,777 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 39278 states to 39278 states and 175237 transitions.
[2022-02-15 13:19:27,777 INFO  L78                 Accepts]: Start accepts. Automaton has 39278 states and 175237 transitions. Word has length 29
[2022-02-15 13:19:27,777 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:19:27,777 INFO  L470      AbstractCegarLoop]: Abstraction has 39278 states and 175237 transitions.
[2022-02-15 13:19:27,777 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)
[2022-02-15 13:19:27,777 INFO  L276                IsEmpty]: Start isEmpty. Operand 39278 states and 175237 transitions.
[2022-02-15 13:19:27,877 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:19:27,877 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:19:27,877 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:19:27,895 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0
[2022-02-15 13:19:28,092 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:28,092 INFO  L402      AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:19:28,093 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:19:28,093 INFO  L85        PathProgramCache]: Analyzing trace with hash -1167414617, now seen corresponding path program 18 times
[2022-02-15 13:19:28,093 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:19:28,093 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544572410]
[2022-02-15 13:19:28,093 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:19:28,093 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:19:28,095 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:19:28,116 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:28,116 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:19:28,116 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544572410]
[2022-02-15 13:19:28,117 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544572410] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:19:28,117 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054637843]
[2022-02-15 13:19:28,117 INFO  L93    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-02-15 13:19:28,117 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:28,117 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:19:28,118 INFO  L229       MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:19:28,119 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process
[2022-02-15 13:19:28,139 INFO  L228   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s)
[2022-02-15 13:19:28,140 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:19:28,140 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:19:28,140 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:19:28,216 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:28,216 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:19:28,521 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:28,521 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054637843] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:19:28,521 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:19:28,522 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9
[2022-02-15 13:19:28,522 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857761365]
[2022-02-15 13:19:28,522 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:19:28,522 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:19:28,522 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:19:28,522 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:19:28,522 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:19:28,522 INFO  L87              Difference]: Start difference. First operand 39278 states and 175237 transitions. Second operand  has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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)
[2022-02-15 13:19:29,474 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:19:29,474 INFO  L93              Difference]: Finished difference Result 68394 states and 287238 transitions.
[2022-02-15 13:19:29,475 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2022-02-15 13:19:29,475 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 29
[2022-02-15 13:19:29,475 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:19:30,365 INFO  L225             Difference]: With dead ends: 68394
[2022-02-15 13:19:30,365 INFO  L226             Difference]: Without dead ends: 68394
[2022-02-15 13:19:30,365 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756
[2022-02-15 13:19:30,370 INFO  L933         BasicCegarLoop]: 42 mSDtfsCounter, 519 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:19:30,370 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 253 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:19:30,449 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 68394 states.
[2022-02-15 13:19:32,010 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 68394 to 39026.
[2022-02-15 13:19:32,083 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 39026 states, 39025 states have (on average 4.450608584240872) internal successors, (173685), 39025 states have internal predecessors, (173685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:32,280 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 39026 states to 39026 states and 173685 transitions.
[2022-02-15 13:19:32,280 INFO  L78                 Accepts]: Start accepts. Automaton has 39026 states and 173685 transitions. Word has length 29
[2022-02-15 13:19:32,280 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:19:32,280 INFO  L470      AbstractCegarLoop]: Abstraction has 39026 states and 173685 transitions.
[2022-02-15 13:19:32,281 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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)
[2022-02-15 13:19:32,281 INFO  L276                IsEmpty]: Start isEmpty. Operand 39026 states and 173685 transitions.
[2022-02-15 13:19:32,382 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:19:32,382 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:19:32,382 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:19:32,400 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0
[2022-02-15 13:19:32,598 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:32,598 INFO  L402      AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:19:32,598 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:19:32,598 INFO  L85        PathProgramCache]: Analyzing trace with hash -177947937, now seen corresponding path program 19 times
[2022-02-15 13:19:32,598 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:19:32,598 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158045496]
[2022-02-15 13:19:32,598 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:19:32,598 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:19:32,601 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:19:32,628 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:32,628 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:19:32,628 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158045496]
[2022-02-15 13:19:32,628 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158045496] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:19:32,628 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738104733]
[2022-02-15 13:19:32,628 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2022-02-15 13:19:32,628 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:32,628 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:19:32,644 INFO  L229       MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:19:32,645 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process
[2022-02-15 13:19:32,664 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:19:32,665 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:19:32,665 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:19:32,743 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:32,744 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:19:32,801 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:32,802 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738104733] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:19:32,802 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:19:32,802 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9
[2022-02-15 13:19:32,802 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599550335]
[2022-02-15 13:19:32,802 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:19:32,802 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:19:32,802 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:19:32,802 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:19:32,802 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:19:32,802 INFO  L87              Difference]: Start difference. First operand 39026 states and 173685 transitions. Second operand  has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:33,745 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:19:33,745 INFO  L93              Difference]: Finished difference Result 49591 states and 212155 transitions.
[2022-02-15 13:19:33,746 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2022-02-15 13:19:33,746 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 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 29
[2022-02-15 13:19:33,746 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:19:33,953 INFO  L225             Difference]: With dead ends: 49591
[2022-02-15 13:19:33,953 INFO  L226             Difference]: Without dead ends: 49566
[2022-02-15 13:19:33,954 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420
[2022-02-15 13:19:33,954 INFO  L933         BasicCegarLoop]: 72 mSDtfsCounter, 173 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:19:33,954 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 409 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:19:34,012 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 49566 states.
[2022-02-15 13:19:35,084 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 49566 to 39082.
[2022-02-15 13:19:35,144 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 39082 states, 39081 states have (on average 4.449553491466442) internal successors, (173893), 39081 states have internal predecessors, (173893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:35,311 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 39082 states to 39082 states and 173893 transitions.
[2022-02-15 13:19:35,311 INFO  L78                 Accepts]: Start accepts. Automaton has 39082 states and 173893 transitions. Word has length 29
[2022-02-15 13:19:35,312 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:19:35,312 INFO  L470      AbstractCegarLoop]: Abstraction has 39082 states and 173893 transitions.
[2022-02-15 13:19:35,312 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:35,312 INFO  L276                IsEmpty]: Start isEmpty. Operand 39082 states and 173893 transitions.
[2022-02-15 13:19:35,422 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:19:35,422 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:19:35,422 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:19:35,438 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0
[2022-02-15 13:19:35,631 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69
[2022-02-15 13:19:35,632 INFO  L402      AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:19:35,632 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:19:35,632 INFO  L85        PathProgramCache]: Analyzing trace with hash -1432006963, now seen corresponding path program 20 times
[2022-02-15 13:19:35,632 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:19:35,632 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204702059]
[2022-02-15 13:19:35,632 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:19:35,632 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:19:35,635 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:19:35,661 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:35,661 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:19:35,661 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204702059]
[2022-02-15 13:19:35,661 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204702059] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:19:35,661 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569597608]
[2022-02-15 13:19:35,661 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:19:35,662 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:35,662 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:19:35,663 INFO  L229       MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:19:35,664 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process
[2022-02-15 13:19:35,684 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:19:35,684 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:19:35,684 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:19:35,684 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:19:35,775 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:35,776 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:19:35,805 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:19:35,805 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569597608] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:19:35,805 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:19:35,805 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10
[2022-02-15 13:19:35,805 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124243710]
[2022-02-15 13:19:35,805 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:19:35,805 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:19:35,806 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:19:35,806 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:19:35,806 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:19:35,806 INFO  L87              Difference]: Start difference. First operand 39082 states and 173893 transitions. Second operand  has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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)
[2022-02-15 13:19:37,443 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:19:37,443 INFO  L93              Difference]: Finished difference Result 122970 states and 525591 transitions.
[2022-02-15 13:19:37,443 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2022-02-15 13:19:37,443 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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 29
[2022-02-15 13:19:37,443 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:19:38,136 INFO  L225             Difference]: With dead ends: 122970
[2022-02-15 13:19:38,137 INFO  L226             Difference]: Without dead ends: 122970
[2022-02-15 13:19:38,137 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702
[2022-02-15 13:19:38,137 INFO  L933         BasicCegarLoop]: 39 mSDtfsCounter, 495 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:19:38,137 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 258 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:19:38,563 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 122970 states.
[2022-02-15 13:19:40,461 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 122970 to 51969.
[2022-02-15 13:19:40,543 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 51969 states, 51968 states have (on average 4.575142395320197) internal successors, (237761), 51968 states have internal predecessors, (237761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:41,035 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 51969 states to 51969 states and 237761 transitions.
[2022-02-15 13:19:41,035 INFO  L78                 Accepts]: Start accepts. Automaton has 51969 states and 237761 transitions. Word has length 29
[2022-02-15 13:19:41,035 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:19:41,035 INFO  L470      AbstractCegarLoop]: Abstraction has 51969 states and 237761 transitions.
[2022-02-15 13:19:41,035 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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)
[2022-02-15 13:19:41,035 INFO  L276                IsEmpty]: Start isEmpty. Operand 51969 states and 237761 transitions.
[2022-02-15 13:19:41,178 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:19:41,179 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:19:41,179 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:19:41,194 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0
[2022-02-15 13:19:41,394 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:41,394 INFO  L402      AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:19:41,394 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:19:41,394 INFO  L85        PathProgramCache]: Analyzing trace with hash -1669970355, now seen corresponding path program 21 times
[2022-02-15 13:19:41,394 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:19:41,394 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717904576]
[2022-02-15 13:19:41,394 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:19:41,395 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:19:41,397 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:19:41,425 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:41,425 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:19:41,426 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717904576]
[2022-02-15 13:19:41,426 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717904576] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:19:41,426 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228811930]
[2022-02-15 13:19:41,426 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:19:41,426 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:41,426 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:19:41,427 INFO  L229       MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:19:41,428 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process
[2022-02-15 13:19:41,449 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2022-02-15 13:19:41,449 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:19:41,450 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:19:41,450 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:19:41,534 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:41,534 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:19:41,591 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:19:41,591 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228811930] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:19:41,591 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:19:41,591 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10
[2022-02-15 13:19:41,591 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204763726]
[2022-02-15 13:19:41,592 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:19:41,592 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:19:41,592 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:19:41,592 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:19:41,592 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:19:41,592 INFO  L87              Difference]: Start difference. First operand 51969 states and 237761 transitions. Second operand  has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:42,870 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:19:42,871 INFO  L93              Difference]: Finished difference Result 83465 states and 358962 transitions.
[2022-02-15 13:19:42,873 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2022-02-15 13:19:42,873 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29
[2022-02-15 13:19:42,873 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:19:43,569 INFO  L225             Difference]: With dead ends: 83465
[2022-02-15 13:19:43,569 INFO  L226             Difference]: Without dead ends: 83417
[2022-02-15 13:19:43,569 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702
[2022-02-15 13:19:43,569 INFO  L933         BasicCegarLoop]: 78 mSDtfsCounter, 312 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:19:43,570 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 492 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:19:43,663 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 83417 states.
[2022-02-15 13:19:45,337 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 83417 to 51969.
[2022-02-15 13:19:45,426 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 51969 states, 51968 states have (on average 4.574911483990148) internal successors, (237749), 51968 states have internal predecessors, (237749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:46,019 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 51969 states to 51969 states and 237749 transitions.
[2022-02-15 13:19:46,019 INFO  L78                 Accepts]: Start accepts. Automaton has 51969 states and 237749 transitions. Word has length 29
[2022-02-15 13:19:46,020 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:19:46,020 INFO  L470      AbstractCegarLoop]: Abstraction has 51969 states and 237749 transitions.
[2022-02-15 13:19:46,020 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:46,020 INFO  L276                IsEmpty]: Start isEmpty. Operand 51969 states and 237749 transitions.
[2022-02-15 13:19:46,195 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:19:46,195 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:19:46,195 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:19:46,212 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0
[2022-02-15 13:19:46,396 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:46,397 INFO  L402      AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:19:46,397 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:19:46,397 INFO  L85        PathProgramCache]: Analyzing trace with hash 944500301, now seen corresponding path program 22 times
[2022-02-15 13:19:46,397 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:19:46,397 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10629850]
[2022-02-15 13:19:46,397 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:19:46,397 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:19:46,399 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:19:46,429 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:19:46,429 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:19:46,429 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10629850]
[2022-02-15 13:19:46,429 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10629850] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:19:46,429 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530667047]
[2022-02-15 13:19:46,430 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:19:46,430 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:46,430 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:19:46,431 INFO  L229       MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:19:46,431 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process
[2022-02-15 13:19:46,452 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:19:46,452 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:19:46,452 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:19:46,453 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:19:46,539 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:46,539 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:19:46,599 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:19:46,599 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530667047] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:19:46,599 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:19:46,599 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10
[2022-02-15 13:19:46,599 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474248508]
[2022-02-15 13:19:46,599 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:19:46,600 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:19:46,600 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:19:46,600 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:19:46,600 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:19:46,600 INFO  L87              Difference]: Start difference. First operand 51969 states and 237749 transitions. Second operand  has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:48,391 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:19:48,391 INFO  L93              Difference]: Finished difference Result 99551 states and 429052 transitions.
[2022-02-15 13:19:48,391 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2022-02-15 13:19:48,392 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29
[2022-02-15 13:19:48,392 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:19:49,402 INFO  L225             Difference]: With dead ends: 99551
[2022-02-15 13:19:49,402 INFO  L226             Difference]: Without dead ends: 99551
[2022-02-15 13:19:49,402 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812
[2022-02-15 13:19:49,403 INFO  L933         BasicCegarLoop]: 65 mSDtfsCounter, 440 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:19:49,403 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 390 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:19:49,516 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 99551 states.
[2022-02-15 13:19:51,397 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 99551 to 52207.
[2022-02-15 13:19:51,480 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 52207 states, 52206 states have (on average 4.573401524728959) internal successors, (238759), 52206 states have internal predecessors, (238759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:52,052 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52207 states to 52207 states and 238759 transitions.
[2022-02-15 13:19:52,052 INFO  L78                 Accepts]: Start accepts. Automaton has 52207 states and 238759 transitions. Word has length 29
[2022-02-15 13:19:52,052 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:19:52,052 INFO  L470      AbstractCegarLoop]: Abstraction has 52207 states and 238759 transitions.
[2022-02-15 13:19:52,052 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:52,052 INFO  L276                IsEmpty]: Start isEmpty. Operand 52207 states and 238759 transitions.
[2022-02-15 13:19:52,204 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:19:52,204 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:19:52,204 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:19:52,219 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0
[2022-02-15 13:19:52,419 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72
[2022-02-15 13:19:52,419 INFO  L402      AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:19:52,420 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:19:52,420 INFO  L85        PathProgramCache]: Analyzing trace with hash 1933966981, now seen corresponding path program 23 times
[2022-02-15 13:19:52,420 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:19:52,420 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27137100]
[2022-02-15 13:19:52,420 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:19:52,420 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:19:52,422 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:19:52,444 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:19:52,445 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:19:52,445 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27137100]
[2022-02-15 13:19:52,445 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27137100] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:19:52,445 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867328156]
[2022-02-15 13:19:52,445 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:19:52,445 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:52,445 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:19:52,446 INFO  L229       MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:19:52,446 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process
[2022-02-15 13:19:52,467 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s)
[2022-02-15 13:19:52,467 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:19:52,467 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:19:52,468 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:19:52,550 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:52,551 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:19:52,599 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:19:52,599 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [867328156] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:19:52,599 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:19:52,599 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10
[2022-02-15 13:19:52,599 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963585213]
[2022-02-15 13:19:52,599 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:19:52,600 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:19:52,600 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:19:52,600 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:19:52,600 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:19:52,600 INFO  L87              Difference]: Start difference. First operand 52207 states and 238759 transitions. Second operand  has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:53,892 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:19:53,892 INFO  L93              Difference]: Finished difference Result 93968 states and 402691 transitions.
[2022-02-15 13:19:53,893 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2022-02-15 13:19:53,893 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29
[2022-02-15 13:19:53,893 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:19:54,557 INFO  L225             Difference]: With dead ends: 93968
[2022-02-15 13:19:54,557 INFO  L226             Difference]: Without dead ends: 93918
[2022-02-15 13:19:54,557 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600
[2022-02-15 13:19:54,557 INFO  L933         BasicCegarLoop]: 56 mSDtfsCounter, 414 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:19:54,557 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 319 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:19:54,649 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 93918 states.
[2022-02-15 13:19:56,236 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 93918 to 52209.
[2022-02-15 13:19:56,319 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 52209 states, 52208 states have (on average 4.573207171314741) internal successors, (238758), 52208 states have internal predecessors, (238758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:56,840 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52209 states to 52209 states and 238758 transitions.
[2022-02-15 13:19:56,840 INFO  L78                 Accepts]: Start accepts. Automaton has 52209 states and 238758 transitions. Word has length 29
[2022-02-15 13:19:56,840 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:19:56,841 INFO  L470      AbstractCegarLoop]: Abstraction has 52209 states and 238758 transitions.
[2022-02-15 13:19:56,841 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:56,841 INFO  L276                IsEmpty]: Start isEmpty. Operand 52209 states and 238758 transitions.
[2022-02-15 13:19:56,986 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:19:56,987 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:19:56,987 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:19:57,004 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0
[2022-02-15 13:19:57,193 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:57,193 INFO  L402      AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:19:57,193 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:19:57,193 INFO  L85        PathProgramCache]: Analyzing trace with hash 70245641, now seen corresponding path program 24 times
[2022-02-15 13:19:57,193 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:19:57,193 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612668412]
[2022-02-15 13:19:57,193 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:19:57,194 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:19:57,196 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:19:57,230 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:57,230 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:19:57,230 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612668412]
[2022-02-15 13:19:57,230 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612668412] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:19:57,230 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213919389]
[2022-02-15 13:19:57,231 INFO  L93    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-02-15 13:19:57,231 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:19:57,231 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:19:57,240 INFO  L229       MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:19:57,241 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process
[2022-02-15 13:19:57,262 INFO  L228   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s)
[2022-02-15 13:19:57,262 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:19:57,262 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:19:57,263 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:19:57,348 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:57,349 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:19:57,397 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:19:57,397 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213919389] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:19:57,397 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:19:57,397 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11
[2022-02-15 13:19:57,397 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137166546]
[2022-02-15 13:19:57,397 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:19:57,398 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-02-15 13:19:57,398 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:19:57,398 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-02-15 13:19:57,398 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132
[2022-02-15 13:19:57,398 INFO  L87              Difference]: Start difference. First operand 52209 states and 238758 transitions. Second operand  has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:19:58,886 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:19:58,886 INFO  L93              Difference]: Finished difference Result 86954 states and 378394 transitions.
[2022-02-15 13:19:58,887 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2022-02-15 13:19:58,888 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29
[2022-02-15 13:19:58,888 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:19:59,665 INFO  L225             Difference]: With dead ends: 86954
[2022-02-15 13:19:59,666 INFO  L226             Difference]: Without dead ends: 86954
[2022-02-15 13:19:59,666 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 13:19:59,666 INFO  L933         BasicCegarLoop]: 59 mSDtfsCounter, 416 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:19:59,666 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 419 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:19:59,766 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 86954 states.
[2022-02-15 13:20:01,395 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 86954 to 49798.
[2022-02-15 13:20:01,480 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 49798 states, 49797 states have (on average 4.546077072916039) internal successors, (226381), 49797 states have internal predecessors, (226381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:01,760 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 49798 states to 49798 states and 226381 transitions.
[2022-02-15 13:20:01,760 INFO  L78                 Accepts]: Start accepts. Automaton has 49798 states and 226381 transitions. Word has length 29
[2022-02-15 13:20:01,760 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:20:01,760 INFO  L470      AbstractCegarLoop]: Abstraction has 49798 states and 226381 transitions.
[2022-02-15 13:20:01,760 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:01,761 INFO  L276                IsEmpty]: Start isEmpty. Operand 49798 states and 226381 transitions.
[2022-02-15 13:20:02,278 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:20:02,279 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:20:02,279 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:20:02,297 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0
[2022-02-15 13:20:02,495 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74
[2022-02-15 13:20:02,495 INFO  L402      AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:20:02,495 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:20:02,495 INFO  L85        PathProgramCache]: Analyzing trace with hash 936509879, now seen corresponding path program 25 times
[2022-02-15 13:20:02,495 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:20:02,495 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041366820]
[2022-02-15 13:20:02,495 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:20:02,495 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:20:02,498 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:20:02,535 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:02,535 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:20:02,535 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041366820]
[2022-02-15 13:20:02,535 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041366820] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:20:02,535 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154299238]
[2022-02-15 13:20:02,535 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2022-02-15 13:20:02,536 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:02,536 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:20:02,537 INFO  L229       MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:20:02,537 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process
[2022-02-15 13:20:02,558 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:20:02,559 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:20:02,559 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:20:02,644 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:02,645 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:20:02,694 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:02,695 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154299238] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:20:02,695 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:20:02,695 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11
[2022-02-15 13:20:02,695 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375673655]
[2022-02-15 13:20:02,695 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:20:02,695 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-02-15 13:20:02,695 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:20:02,695 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-02-15 13:20:02,695 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132
[2022-02-15 13:20:02,695 INFO  L87              Difference]: Start difference. First operand 49798 states and 226381 transitions. Second operand  has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:04,024 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:20:04,024 INFO  L93              Difference]: Finished difference Result 80496 states and 344078 transitions.
[2022-02-15 13:20:04,024 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2022-02-15 13:20:04,025 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29
[2022-02-15 13:20:04,025 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:20:04,439 INFO  L225             Difference]: With dead ends: 80496
[2022-02-15 13:20:04,439 INFO  L226             Difference]: Without dead ends: 80421
[2022-02-15 13:20:04,439 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756
[2022-02-15 13:20:04,439 INFO  L933         BasicCegarLoop]: 50 mSDtfsCounter, 376 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:20:04,439 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 379 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:20:04,563 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 80421 states.
[2022-02-15 13:20:06,199 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 80421 to 50365.
[2022-02-15 13:20:06,278 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 50365 states, 50364 states have (on average 4.546441902946549) internal successors, (228977), 50364 states have internal predecessors, (228977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:06,760 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50365 states to 50365 states and 228977 transitions.
[2022-02-15 13:20:06,761 INFO  L78                 Accepts]: Start accepts. Automaton has 50365 states and 228977 transitions. Word has length 29
[2022-02-15 13:20:06,761 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:20:06,761 INFO  L470      AbstractCegarLoop]: Abstraction has 50365 states and 228977 transitions.
[2022-02-15 13:20:06,761 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:06,761 INFO  L276                IsEmpty]: Start isEmpty. Operand 50365 states and 228977 transitions.
[2022-02-15 13:20:06,903 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:20:06,903 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:20:06,903 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:20:06,924 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0
[2022-02-15 13:20:07,121 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75
[2022-02-15 13:20:07,122 INFO  L402      AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:20:07,122 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:20:07,122 INFO  L85        PathProgramCache]: Analyzing trace with hash -468416107, now seen corresponding path program 26 times
[2022-02-15 13:20:07,122 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:20:07,122 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391243178]
[2022-02-15 13:20:07,122 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:20:07,122 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:20:07,126 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:20:07,171 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:07,172 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:20:07,172 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391243178]
[2022-02-15 13:20:07,172 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391243178] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:20:07,172 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285061855]
[2022-02-15 13:20:07,172 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:20:07,172 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:07,172 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:20:07,174 INFO  L229       MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:20:07,175 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process
[2022-02-15 13:20:07,196 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:20:07,196 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:20:07,196 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:20:07,197 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:20:07,302 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:07,302 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:20:07,357 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:20:07,357 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285061855] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:20:07,357 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:20:07,357 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11
[2022-02-15 13:20:07,358 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718278912]
[2022-02-15 13:20:07,358 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:20:07,358 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-02-15 13:20:07,358 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:20:07,358 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-02-15 13:20:07,358 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132
[2022-02-15 13:20:07,358 INFO  L87              Difference]: Start difference. First operand 50365 states and 228977 transitions. Second operand  has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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)
[2022-02-15 13:20:09,008 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:20:09,008 INFO  L93              Difference]: Finished difference Result 99418 states and 427978 transitions.
[2022-02-15 13:20:09,008 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2022-02-15 13:20:09,009 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 29
[2022-02-15 13:20:09,009 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:20:09,627 INFO  L225             Difference]: With dead ends: 99418
[2022-02-15 13:20:09,627 INFO  L226             Difference]: Without dead ends: 99418
[2022-02-15 13:20:09,627 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 13:20:09,628 INFO  L933         BasicCegarLoop]: 53 mSDtfsCounter, 415 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:20:09,628 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 348 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:20:09,760 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 99418 states.
[2022-02-15 13:20:11,666 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 99418 to 48495.
[2022-02-15 13:20:11,750 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 48495 states, 48494 states have (on average 4.518827071390275) internal successors, (219136), 48494 states have internal predecessors, (219136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:12,237 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 48495 states to 48495 states and 219136 transitions.
[2022-02-15 13:20:12,237 INFO  L78                 Accepts]: Start accepts. Automaton has 48495 states and 219136 transitions. Word has length 29
[2022-02-15 13:20:12,237 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:20:12,238 INFO  L470      AbstractCegarLoop]: Abstraction has 48495 states and 219136 transitions.
[2022-02-15 13:20:12,238 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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)
[2022-02-15 13:20:12,238 INFO  L276                IsEmpty]: Start isEmpty. Operand 48495 states and 219136 transitions.
[2022-02-15 13:20:12,381 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:20:12,381 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:20:12,381 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:20:12,398 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0
[2022-02-15 13:20:12,598 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:12,598 INFO  L402      AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:20:12,598 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:20:12,599 INFO  L85        PathProgramCache]: Analyzing trace with hash -1517969131, now seen corresponding path program 27 times
[2022-02-15 13:20:12,599 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:20:12,599 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832712649]
[2022-02-15 13:20:12,599 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:20:12,599 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:20:12,606 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:20:12,643 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:12,643 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:20:12,644 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832712649]
[2022-02-15 13:20:12,644 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832712649] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:20:12,644 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224384422]
[2022-02-15 13:20:12,644 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:20:12,644 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:12,644 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:20:12,645 INFO  L229       MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:20:12,646 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process
[2022-02-15 13:20:12,666 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2022-02-15 13:20:12,666 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:20:12,666 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:20:12,667 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:20:12,747 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:12,747 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:20:12,794 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:20:12,795 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224384422] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:20:12,795 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:20:12,795 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11
[2022-02-15 13:20:12,795 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578487945]
[2022-02-15 13:20:12,795 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:20:12,795 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-02-15 13:20:12,795 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:20:12,795 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-02-15 13:20:12,795 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132
[2022-02-15 13:20:12,795 INFO  L87              Difference]: Start difference. First operand 48495 states and 219136 transitions. Second operand  has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:13,958 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:20:13,958 INFO  L93              Difference]: Finished difference Result 69880 states and 298246 transitions.
[2022-02-15 13:20:13,959 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2022-02-15 13:20:13,959 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 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 29
[2022-02-15 13:20:13,959 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:20:14,278 INFO  L225             Difference]: With dead ends: 69880
[2022-02-15 13:20:14,278 INFO  L226             Difference]: Without dead ends: 69808
[2022-02-15 13:20:14,278 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756
[2022-02-15 13:20:14,278 INFO  L933         BasicCegarLoop]: 50 mSDtfsCounter, 389 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:20:14,279 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 348 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:20:14,588 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 69808 states.
[2022-02-15 13:20:15,625 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 69808 to 47135.
[2022-02-15 13:20:15,698 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 47135 states, 47134 states have (on average 4.529511605210676) internal successors, (213494), 47134 states have internal predecessors, (213494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:16,075 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 47135 states to 47135 states and 213494 transitions.
[2022-02-15 13:20:16,075 INFO  L78                 Accepts]: Start accepts. Automaton has 47135 states and 213494 transitions. Word has length 29
[2022-02-15 13:20:16,075 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:20:16,075 INFO  L470      AbstractCegarLoop]: Abstraction has 47135 states and 213494 transitions.
[2022-02-15 13:20:16,075 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:16,075 INFO  L276                IsEmpty]: Start isEmpty. Operand 47135 states and 213494 transitions.
[2022-02-15 13:20:16,197 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:20:16,197 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:20:16,197 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:20:16,215 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0
[2022-02-15 13:20:16,403 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:16,403 INFO  L402      AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:20:16,403 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:20:16,404 INFO  L85        PathProgramCache]: Analyzing trace with hash 1260692049, now seen corresponding path program 28 times
[2022-02-15 13:20:16,404 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:20:16,404 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381781220]
[2022-02-15 13:20:16,404 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:20:16,404 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:20:16,417 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:20:16,465 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:16,465 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:20:16,465 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381781220]
[2022-02-15 13:20:16,465 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381781220] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:20:16,465 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383630157]
[2022-02-15 13:20:16,465 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:20:16,465 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:16,465 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:20:16,466 INFO  L229       MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:20:16,468 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process
[2022-02-15 13:20:16,486 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:20:16,487 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:20:16,487 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:20:16,487 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:20:16,564 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:16,564 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:20:16,615 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:20:16,616 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383630157] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:20:16,616 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:20:16,616 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9
[2022-02-15 13:20:16,616 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254048117]
[2022-02-15 13:20:16,616 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:20:16,616 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:20:16,616 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:20:16,616 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:20:16,616 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:20:16,616 INFO  L87              Difference]: Start difference. First operand 47135 states and 213494 transitions. Second operand  has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:17,987 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:20:17,988 INFO  L93              Difference]: Finished difference Result 89708 states and 381495 transitions.
[2022-02-15 13:20:17,988 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2022-02-15 13:20:17,988 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 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 29
[2022-02-15 13:20:17,988 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:20:18,706 INFO  L225             Difference]: With dead ends: 89708
[2022-02-15 13:20:18,706 INFO  L226             Difference]: Without dead ends: 89708
[2022-02-15 13:20:18,706 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756
[2022-02-15 13:20:18,707 INFO  L933         BasicCegarLoop]: 37 mSDtfsCounter, 444 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:20:18,707 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 238 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:20:18,805 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 89708 states.
[2022-02-15 13:20:20,425 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 89708 to 50510.
[2022-02-15 13:20:20,506 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 50510 states, 50509 states have (on average 4.561880060979232) internal successors, (230416), 50509 states have internal predecessors, (230416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:21,087 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50510 states to 50510 states and 230416 transitions.
[2022-02-15 13:20:21,088 INFO  L78                 Accepts]: Start accepts. Automaton has 50510 states and 230416 transitions. Word has length 29
[2022-02-15 13:20:21,088 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:20:21,088 INFO  L470      AbstractCegarLoop]: Abstraction has 50510 states and 230416 transitions.
[2022-02-15 13:20:21,088 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:21,088 INFO  L276                IsEmpty]: Start isEmpty. Operand 50510 states and 230416 transitions.
[2022-02-15 13:20:21,301 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:20:21,302 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:20:21,302 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:20:21,318 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0
[2022-02-15 13:20:21,502 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78
[2022-02-15 13:20:21,502 INFO  L402      AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:20:21,502 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:20:21,503 INFO  L85        PathProgramCache]: Analyzing trace with hash 1022728657, now seen corresponding path program 29 times
[2022-02-15 13:20:21,503 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:20:21,503 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873303867]
[2022-02-15 13:20:21,503 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:20:21,503 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:20:21,505 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:20:21,530 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:21,530 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:20:21,530 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873303867]
[2022-02-15 13:20:21,530 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873303867] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:20:21,530 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236152491]
[2022-02-15 13:20:21,530 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:20:21,530 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:21,531 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:20:21,532 INFO  L229       MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:20:21,533 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process
[2022-02-15 13:20:21,553 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s)
[2022-02-15 13:20:21,553 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:20:21,553 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:20:21,554 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:20:21,632 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:21,633 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:20:21,691 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:20:21,691 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [236152491] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:20:21,691 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:20:21,691 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9
[2022-02-15 13:20:21,691 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724095348]
[2022-02-15 13:20:21,691 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:20:21,691 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:20:21,691 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:20:21,692 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:20:21,692 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:20:21,692 INFO  L87              Difference]: Start difference. First operand 50510 states and 230416 transitions. Second operand  has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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)
[2022-02-15 13:20:23,046 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:20:23,046 INFO  L93              Difference]: Finished difference Result 67513 states and 293577 transitions.
[2022-02-15 13:20:23,047 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2022-02-15 13:20:23,047 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 29
[2022-02-15 13:20:23,047 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:20:23,571 INFO  L225             Difference]: With dead ends: 67513
[2022-02-15 13:20:23,572 INFO  L226             Difference]: Without dead ends: 67489
[2022-02-15 13:20:23,572 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462
[2022-02-15 13:20:23,572 INFO  L933         BasicCegarLoop]: 79 mSDtfsCounter, 223 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 13:20:23,572 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 380 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 13:20:23,656 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 67489 states.
[2022-02-15 13:20:25,141 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 67489 to 50508.
[2022-02-15 13:20:25,225 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 50508 states, 50507 states have (on average 4.561565723563071) internal successors, (230391), 50507 states have internal predecessors, (230391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:25,481 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50508 states to 50508 states and 230391 transitions.
[2022-02-15 13:20:25,482 INFO  L78                 Accepts]: Start accepts. Automaton has 50508 states and 230391 transitions. Word has length 29
[2022-02-15 13:20:25,482 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:20:25,482 INFO  L470      AbstractCegarLoop]: Abstraction has 50508 states and 230391 transitions.
[2022-02-15 13:20:25,482 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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)
[2022-02-15 13:20:25,482 INFO  L276                IsEmpty]: Start isEmpty. Operand 50508 states and 230391 transitions.
[2022-02-15 13:20:25,923 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:20:25,923 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:20:25,923 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:20:25,939 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0
[2022-02-15 13:20:26,135 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79
[2022-02-15 13:20:26,135 INFO  L402      AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:20:26,136 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:20:26,136 INFO  L85        PathProgramCache]: Analyzing trace with hash -657767983, now seen corresponding path program 30 times
[2022-02-15 13:20:26,136 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:20:26,136 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616813868]
[2022-02-15 13:20:26,136 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:20:26,136 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:20:26,138 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:20:26,159 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:26,160 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:20:26,160 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616813868]
[2022-02-15 13:20:26,160 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616813868] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:20:26,160 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282838690]
[2022-02-15 13:20:26,160 INFO  L93    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-02-15 13:20:26,160 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:26,160 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:20:26,161 INFO  L229       MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:20:26,162 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process
[2022-02-15 13:20:26,189 INFO  L228   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s)
[2022-02-15 13:20:26,190 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:20:26,191 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:20:26,191 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:20:26,249 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:26,249 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:20:26,289 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:20:26,289 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [282838690] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:20:26,289 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:20:26,289 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9
[2022-02-15 13:20:26,289 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776053872]
[2022-02-15 13:20:26,289 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:20:26,290 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:20:26,290 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:20:26,290 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:20:26,290 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:20:26,290 INFO  L87              Difference]: Start difference. First operand 50508 states and 230391 transitions. Second operand  has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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)
[2022-02-15 13:20:27,607 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:20:27,607 INFO  L93              Difference]: Finished difference Result 77373 states and 335751 transitions.
[2022-02-15 13:20:27,607 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2022-02-15 13:20:27,607 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 29
[2022-02-15 13:20:27,607 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:20:28,052 INFO  L225             Difference]: With dead ends: 77373
[2022-02-15 13:20:28,052 INFO  L226             Difference]: Without dead ends: 77373
[2022-02-15 13:20:28,052 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650
[2022-02-15 13:20:28,053 INFO  L933         BasicCegarLoop]: 75 mSDtfsCounter, 280 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:20:28,053 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 431 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:20:28,138 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 77373 states.
[2022-02-15 13:20:29,816 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 77373 to 50746.
[2022-02-15 13:20:29,903 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 50746 states, 50745 states have (on average 4.560074884225047) internal successors, (231401), 50745 states have internal predecessors, (231401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:30,418 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50746 states to 50746 states and 231401 transitions.
[2022-02-15 13:20:30,418 INFO  L78                 Accepts]: Start accepts. Automaton has 50746 states and 231401 transitions. Word has length 29
[2022-02-15 13:20:30,418 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:20:30,419 INFO  L470      AbstractCegarLoop]: Abstraction has 50746 states and 231401 transitions.
[2022-02-15 13:20:30,419 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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)
[2022-02-15 13:20:30,419 INFO  L276                IsEmpty]: Start isEmpty. Operand 50746 states and 231401 transitions.
[2022-02-15 13:20:30,580 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:20:30,580 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:20:30,580 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:20:30,597 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0
[2022-02-15 13:20:30,797 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:30,797 INFO  L402      AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:20:30,797 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:20:30,797 INFO  L85        PathProgramCache]: Analyzing trace with hash 331698697, now seen corresponding path program 31 times
[2022-02-15 13:20:30,797 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:20:30,797 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304714189]
[2022-02-15 13:20:30,797 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:20:30,797 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:20:30,800 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:20:30,838 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:30,838 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:20:30,838 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304714189]
[2022-02-15 13:20:30,839 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304714189] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:20:30,839 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282260785]
[2022-02-15 13:20:30,839 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2022-02-15 13:20:30,839 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:30,839 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:20:30,842 INFO  L229       MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:20:30,859 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process
[2022-02-15 13:20:30,864 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:20:30,865 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:20:30,865 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:20:30,943 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:30,944 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:20:30,994 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:20:30,994 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282260785] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:20:30,994 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:20:30,994 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9
[2022-02-15 13:20:30,994 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053064396]
[2022-02-15 13:20:30,994 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:20:30,994 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:20:30,994 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:20:30,995 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:20:30,995 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:20:30,995 INFO  L87              Difference]: Start difference. First operand 50746 states and 231401 transitions. Second operand  has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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)
[2022-02-15 13:20:32,336 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:20:32,336 INFO  L93              Difference]: Finished difference Result 86093 states and 364091 transitions.
[2022-02-15 13:20:32,336 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2022-02-15 13:20:32,336 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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 29
[2022-02-15 13:20:32,336 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:20:33,028 INFO  L225             Difference]: With dead ends: 86093
[2022-02-15 13:20:33,029 INFO  L226             Difference]: Without dead ends: 86068
[2022-02-15 13:20:33,029 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812
[2022-02-15 13:20:33,029 INFO  L933         BasicCegarLoop]: 52 mSDtfsCounter, 453 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:20:33,029 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 285 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:20:33,127 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 86068 states.
[2022-02-15 13:20:34,760 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 86068 to 50746.
[2022-02-15 13:20:34,855 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 50746 states, 50745 states have (on average 4.559838407724899) internal successors, (231389), 50745 states have internal predecessors, (231389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:35,111 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50746 states to 50746 states and 231389 transitions.
[2022-02-15 13:20:35,112 INFO  L78                 Accepts]: Start accepts. Automaton has 50746 states and 231389 transitions. Word has length 29
[2022-02-15 13:20:35,112 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:20:35,112 INFO  L470      AbstractCegarLoop]: Abstraction has 50746 states and 231389 transitions.
[2022-02-15 13:20:35,112 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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)
[2022-02-15 13:20:35,112 INFO  L276                IsEmpty]: Start isEmpty. Operand 50746 states and 231389 transitions.
[2022-02-15 13:20:35,269 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:20:35,269 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:20:35,269 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:20:35,289 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0
[2022-02-15 13:20:35,486 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:35,487 INFO  L402      AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:20:35,487 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:20:35,487 INFO  L85        PathProgramCache]: Analyzing trace with hash -1532022643, now seen corresponding path program 32 times
[2022-02-15 13:20:35,487 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:20:35,487 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498785720]
[2022-02-15 13:20:35,487 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:20:35,487 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:20:35,492 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:20:35,869 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:20:35,869 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:20:35,869 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498785720]
[2022-02-15 13:20:35,869 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498785720] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:20:35,869 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223401572]
[2022-02-15 13:20:35,869 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:20:35,869 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:35,870 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:20:35,884 INFO  L229       MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:20:35,886 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process
[2022-02-15 13:20:35,912 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:20:35,912 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:20:35,912 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:20:35,914 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:20:35,977 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:35,978 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:20:36,009 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:20:36,009 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223401572] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:20:36,010 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:20:36,010 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10
[2022-02-15 13:20:36,010 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095595085]
[2022-02-15 13:20:36,010 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:20:36,010 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:20:36,010 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:20:36,010 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:20:36,010 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:20:36,010 INFO  L87              Difference]: Start difference. First operand 50746 states and 231389 transitions. Second operand  has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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)
[2022-02-15 13:20:37,785 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:20:37,785 INFO  L93              Difference]: Finished difference Result 110373 states and 481503 transitions.
[2022-02-15 13:20:37,785 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. 
[2022-02-15 13:20:37,786 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 29
[2022-02-15 13:20:37,786 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:20:38,704 INFO  L225             Difference]: With dead ends: 110373
[2022-02-15 13:20:38,704 INFO  L226             Difference]: Without dead ends: 110373
[2022-02-15 13:20:38,704 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=565, Invalid=2191, Unknown=0, NotChecked=0, Total=2756
[2022-02-15 13:20:38,704 INFO  L933         BasicCegarLoop]: 81 mSDtfsCounter, 478 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:20:38,704 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 577 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:20:38,815 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 110373 states.
[2022-02-15 13:20:40,824 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 110373 to 51698.
[2022-02-15 13:20:40,911 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 51698 states, 51697 states have (on average 4.5540166740816685) internal successors, (235429), 51697 states have internal predecessors, (235429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:41,493 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 51698 states to 51698 states and 235429 transitions.
[2022-02-15 13:20:41,493 INFO  L78                 Accepts]: Start accepts. Automaton has 51698 states and 235429 transitions. Word has length 29
[2022-02-15 13:20:41,493 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:20:41,493 INFO  L470      AbstractCegarLoop]: Abstraction has 51698 states and 235429 transitions.
[2022-02-15 13:20:41,494 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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)
[2022-02-15 13:20:41,494 INFO  L276                IsEmpty]: Start isEmpty. Operand 51698 states and 235429 transitions.
[2022-02-15 13:20:41,688 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:20:41,688 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:20:41,688 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:20:41,706 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0
[2022-02-15 13:20:41,905 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82
[2022-02-15 13:20:41,906 INFO  L402      AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:20:41,906 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:20:41,906 INFO  L85        PathProgramCache]: Analyzing trace with hash -665758405, now seen corresponding path program 33 times
[2022-02-15 13:20:41,906 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:20:41,906 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579451206]
[2022-02-15 13:20:41,906 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:20:41,906 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:20:41,910 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:20:41,936 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:20:41,936 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:20:41,936 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579451206]
[2022-02-15 13:20:41,936 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579451206] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:20:41,936 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038801827]
[2022-02-15 13:20:41,936 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:20:41,936 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:41,936 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:20:41,938 INFO  L229       MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:20:41,938 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process
[2022-02-15 13:20:41,958 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2022-02-15 13:20:41,958 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:20:41,959 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:20:41,959 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:20:42,037 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:42,037 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:20:42,082 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:20:42,082 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038801827] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:20:42,082 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:20:42,082 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10
[2022-02-15 13:20:42,082 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398270613]
[2022-02-15 13:20:42,082 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:20:42,082 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:20:42,083 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:20:42,083 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:20:42,083 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:20:42,083 INFO  L87              Difference]: Start difference. First operand 51698 states and 235429 transitions. Second operand  has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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)
[2022-02-15 13:20:43,622 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:20:43,622 INFO  L93              Difference]: Finished difference Result 100748 states and 423395 transitions.
[2022-02-15 13:20:43,622 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. 
[2022-02-15 13:20:43,622 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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 29
[2022-02-15 13:20:43,623 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:20:44,445 INFO  L225             Difference]: With dead ends: 100748
[2022-02-15 13:20:44,445 INFO  L226             Difference]: Without dead ends: 100498
[2022-02-15 13:20:44,445 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 13:20:44,445 INFO  L933         BasicCegarLoop]: 60 mSDtfsCounter, 435 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:20:44,445 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 414 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:20:44,563 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 100498 states.
[2022-02-15 13:20:46,315 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 100498 to 51700.
[2022-02-15 13:20:46,394 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 51700 states, 51699 states have (on average 4.553163504129674) internal successors, (235394), 51699 states have internal predecessors, (235394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:46,836 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 51700 states to 51700 states and 235394 transitions.
[2022-02-15 13:20:46,836 INFO  L78                 Accepts]: Start accepts. Automaton has 51700 states and 235394 transitions. Word has length 29
[2022-02-15 13:20:46,837 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:20:46,837 INFO  L470      AbstractCegarLoop]: Abstraction has 51700 states and 235394 transitions.
[2022-02-15 13:20:46,837 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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)
[2022-02-15 13:20:46,837 INFO  L276                IsEmpty]: Start isEmpty. Operand 51700 states and 235394 transitions.
[2022-02-15 13:20:47,004 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:20:47,004 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:20:47,004 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:20:47,022 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0
[2022-02-15 13:20:47,223 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:47,224 INFO  L402      AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:20:47,224 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:20:47,224 INFO  L85        PathProgramCache]: Analyzing trace with hash 1816433037, now seen corresponding path program 34 times
[2022-02-15 13:20:47,224 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:20:47,224 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877608678]
[2022-02-15 13:20:47,224 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:20:47,224 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:20:47,226 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:20:47,252 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:47,253 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:20:47,253 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877608678]
[2022-02-15 13:20:47,253 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877608678] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:20:47,253 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158809866]
[2022-02-15 13:20:47,253 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:20:47,253 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:47,253 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:20:47,254 INFO  L229       MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:20:47,255 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process
[2022-02-15 13:20:47,274 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:20:47,275 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:20:47,275 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:20:47,275 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:20:47,352 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:47,352 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:20:47,405 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:47,406 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [158809866] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:20:47,406 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:20:47,406 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10
[2022-02-15 13:20:47,406 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399766773]
[2022-02-15 13:20:47,406 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:20:47,406 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:20:47,406 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:20:47,406 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:20:47,406 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:20:47,406 INFO  L87              Difference]: Start difference. First operand 51700 states and 235394 transitions. Second operand  has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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)
[2022-02-15 13:20:49,426 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:20:49,427 INFO  L93              Difference]: Finished difference Result 96462 states and 425424 transitions.
[2022-02-15 13:20:49,427 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. 
[2022-02-15 13:20:49,427 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 29
[2022-02-15 13:20:49,427 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:20:49,921 INFO  L225             Difference]: With dead ends: 96462
[2022-02-15 13:20:49,921 INFO  L226             Difference]: Without dead ends: 96437
[2022-02-15 13:20:49,921 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806
[2022-02-15 13:20:49,921 INFO  L933         BasicCegarLoop]: 128 mSDtfsCounter, 248 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 13:20:49,921 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 654 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 13:20:50,040 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 96437 states.
[2022-02-15 13:20:51,972 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 96437 to 53421.
[2022-02-15 13:20:52,057 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 53421 states, 53420 states have (on average 4.527517783601647) internal successors, (241860), 53420 states have internal predecessors, (241860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:52,514 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 53421 states to 53421 states and 241860 transitions.
[2022-02-15 13:20:52,514 INFO  L78                 Accepts]: Start accepts. Automaton has 53421 states and 241860 transitions. Word has length 29
[2022-02-15 13:20:52,514 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:20:52,514 INFO  L470      AbstractCegarLoop]: Abstraction has 53421 states and 241860 transitions.
[2022-02-15 13:20:52,514 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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)
[2022-02-15 13:20:52,514 INFO  L276                IsEmpty]: Start isEmpty. Operand 53421 states and 241860 transitions.
[2022-02-15 13:20:52,672 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-02-15 13:20:52,673 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:20:52,673 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:20:52,689 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0
[2022-02-15 13:20:52,882 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:52,882 INFO  L402      AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:20:52,890 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:20:52,890 INFO  L85        PathProgramCache]: Analyzing trace with hash 303066167, now seen corresponding path program 35 times
[2022-02-15 13:20:52,891 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:20:52,891 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249724910]
[2022-02-15 13:20:52,891 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:20:52,891 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:20:52,893 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:20:52,945 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:52,945 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:20:52,945 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249724910]
[2022-02-15 13:20:52,945 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249724910] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:20:52,945 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800132517]
[2022-02-15 13:20:52,945 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:20:52,945 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:52,945 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:20:52,946 INFO  L229       MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:20:52,963 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process
[2022-02-15 13:20:52,987 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s)
[2022-02-15 13:20:52,987 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:20:52,988 INFO  L263         TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-02-15 13:20:52,989 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:20:53,074 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:53,074 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:20:53,123 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:53,124 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [800132517] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:20:53,124 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:20:53,124 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10
[2022-02-15 13:20:53,124 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151487966]
[2022-02-15 13:20:53,124 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:20:53,124 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:20:53,124 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:20:53,124 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:20:53,124 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:20:53,124 INFO  L87              Difference]: Start difference. First operand 53421 states and 241860 transitions. Second operand  has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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)
[2022-02-15 13:20:54,360 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:20:54,361 INFO  L93              Difference]: Finished difference Result 84563 states and 356651 transitions.
[2022-02-15 13:20:54,361 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2022-02-15 13:20:54,361 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 29
[2022-02-15 13:20:54,361 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:20:55,001 INFO  L225             Difference]: With dead ends: 84563
[2022-02-15 13:20:55,002 INFO  L226             Difference]: Without dead ends: 84422
[2022-02-15 13:20:55,003 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 13:20:55,003 INFO  L933         BasicCegarLoop]: 39 mSDtfsCounter, 480 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:20:55,003 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 292 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:20:55,097 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 84422 states.
[2022-02-15 13:20:56,853 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 84422 to 54317.
[2022-02-15 13:20:56,946 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 54317 states, 54316 states have (on average 4.513716032108403) internal successors, (245167), 54316 states have internal predecessors, (245167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:20:57,702 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 54317 states to 54317 states and 245167 transitions.
[2022-02-15 13:20:57,702 INFO  L78                 Accepts]: Start accepts. Automaton has 54317 states and 245167 transitions. Word has length 29
[2022-02-15 13:20:57,703 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:20:57,703 INFO  L470      AbstractCegarLoop]: Abstraction has 54317 states and 245167 transitions.
[2022-02-15 13:20:57,703 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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)
[2022-02-15 13:20:57,703 INFO  L276                IsEmpty]: Start isEmpty. Operand 54317 states and 245167 transitions.
[2022-02-15 13:20:57,932 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:20:57,933 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:20:57,940 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:20:57,979 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0
[2022-02-15 13:20:58,157 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:58,157 INFO  L402      AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:20:58,157 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:20:58,157 INFO  L85        PathProgramCache]: Analyzing trace with hash 971511529, now seen corresponding path program 36 times
[2022-02-15 13:20:58,157 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:20:58,157 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717001969]
[2022-02-15 13:20:58,157 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:20:58,157 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:20:58,184 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:20:58,264 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:58,264 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:20:58,264 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717001969]
[2022-02-15 13:20:58,265 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717001969] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:20:58,265 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425119655]
[2022-02-15 13:20:58,265 INFO  L93    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-02-15 13:20:58,265 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:20:58,265 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:20:58,283 INFO  L229       MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:20:58,342 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process
[2022-02-15 13:20:58,363 INFO  L228   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s)
[2022-02-15 13:20:58,363 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:20:58,363 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:20:58,364 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:20:58,797 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:58,797 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:20:58,968 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:20:58,968 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425119655] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:20:58,968 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:20:58,968 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 8
[2022-02-15 13:20:58,968 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829398360]
[2022-02-15 13:20:58,968 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:20:58,968 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-02-15 13:20:58,968 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:20:58,969 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-02-15 13:20:58,969 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2022-02-15 13:20:58,969 INFO  L87              Difference]: Start difference. First operand 54317 states and 245167 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)
[2022-02-15 13:21:00,024 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:21:00,024 INFO  L93              Difference]: Finished difference Result 56833 states and 254304 transitions.
[2022-02-15 13:21:00,025 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2022-02-15 13:21:00,025 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 31
[2022-02-15 13:21:00,025 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:21:00,387 INFO  L225             Difference]: With dead ends: 56833
[2022-02-15 13:21:00,388 INFO  L226             Difference]: Without dead ends: 56765
[2022-02-15 13:21:00,388 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 10 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2022-02-15 13:21:00,388 INFO  L933         BasicCegarLoop]: 32 mSDtfsCounter, 95 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:21:00,388 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 178 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:21:00,454 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 56765 states.
[2022-02-15 13:21:01,891 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 56765 to 55387.
[2022-02-15 13:21:01,980 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 55387 states, 55386 states have (on average 4.503304084064565) internal successors, (249420), 55386 states have internal predecessors, (249420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:02,535 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 55387 states to 55387 states and 249420 transitions.
[2022-02-15 13:21:02,535 INFO  L78                 Accepts]: Start accepts. Automaton has 55387 states and 249420 transitions. Word has length 31
[2022-02-15 13:21:02,536 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:21:02,536 INFO  L470      AbstractCegarLoop]: Abstraction has 55387 states and 249420 transitions.
[2022-02-15 13:21:02,536 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)
[2022-02-15 13:21:02,536 INFO  L276                IsEmpty]: Start isEmpty. Operand 55387 states and 249420 transitions.
[2022-02-15 13:21:02,719 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:21:02,719 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:21:02,719 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:21:02,736 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0
[2022-02-15 13:21:02,920 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86
[2022-02-15 13:21:02,920 INFO  L402      AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:21:02,920 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:21:02,920 INFO  L85        PathProgramCache]: Analyzing trace with hash 1033676257, now seen corresponding path program 37 times
[2022-02-15 13:21:02,920 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:21:02,920 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177239113]
[2022-02-15 13:21:02,920 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:21:02,920 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:21:02,923 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:21:02,982 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:21:02,983 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:21:02,983 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177239113]
[2022-02-15 13:21:02,983 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177239113] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:21:02,984 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782824152]
[2022-02-15 13:21:02,984 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2022-02-15 13:21:02,985 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:02,985 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:21:02,986 INFO  L229       MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:21:02,987 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process
[2022-02-15 13:21:03,010 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:21:03,011 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:21:03,011 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:21:03,402 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:03,402 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:21:03,538 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:21:03,538 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782824152] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:21:03,539 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:21:03,539 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 9
[2022-02-15 13:21:03,539 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784303763]
[2022-02-15 13:21:03,539 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:21:03,539 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:21:03,539 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:21:03,540 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:21:03,540 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:21:03,540 INFO  L87              Difference]: Start difference. First operand 55387 states and 249420 transitions. Second operand  has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:04,745 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:21:04,745 INFO  L93              Difference]: Finished difference Result 57655 states and 257614 transitions.
[2022-02-15 13:21:04,746 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2022-02-15 13:21:04,746 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 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 31
[2022-02-15 13:21:04,746 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:21:05,059 INFO  L225             Difference]: With dead ends: 57655
[2022-02-15 13:21:05,059 INFO  L226             Difference]: Without dead ends: 57519
[2022-02-15 13:21:05,060 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 11 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:21:05,060 INFO  L933         BasicCegarLoop]: 36 mSDtfsCounter, 119 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:21:05,060 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 205 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:21:05,129 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57519 states.
[2022-02-15 13:21:06,568 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57519 to 55763.
[2022-02-15 13:21:06,661 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 55763 states, 55762 states have (on average 4.50256447042789) internal successors, (251072), 55762 states have internal predecessors, (251072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:07,212 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 55763 states to 55763 states and 251072 transitions.
[2022-02-15 13:21:07,212 INFO  L78                 Accepts]: Start accepts. Automaton has 55763 states and 251072 transitions. Word has length 31
[2022-02-15 13:21:07,212 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:21:07,212 INFO  L470      AbstractCegarLoop]: Abstraction has 55763 states and 251072 transitions.
[2022-02-15 13:21:07,212 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:07,212 INFO  L276                IsEmpty]: Start isEmpty. Operand 55763 states and 251072 transitions.
[2022-02-15 13:21:07,388 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:21:07,388 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:21:07,388 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:21:07,405 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0
[2022-02-15 13:21:07,604 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87
[2022-02-15 13:21:07,605 INFO  L402      AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:21:07,605 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:21:07,605 INFO  L85        PathProgramCache]: Analyzing trace with hash 351590437, now seen corresponding path program 10 times
[2022-02-15 13:21:07,606 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:21:07,606 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142235082]
[2022-02-15 13:21:07,606 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:21:07,606 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:21:07,614 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:21:07,717 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:07,717 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:21:07,717 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142235082]
[2022-02-15 13:21:07,717 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142235082] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:21:07,718 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492802515]
[2022-02-15 13:21:07,718 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:21:07,718 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:07,718 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:21:07,719 INFO  L229       MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:21:07,720 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process
[2022-02-15 13:21:07,738 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:21:07,738 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:21:07,738 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:21:07,739 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:21:08,059 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:08,059 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:21:08,161 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:08,161 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [492802515] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:21:08,161 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:21:08,161 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 10
[2022-02-15 13:21:08,161 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831709278]
[2022-02-15 13:21:08,161 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:21:08,161 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:21:08,161 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:21:08,162 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:21:08,162 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:21:08,162 INFO  L87              Difference]: Start difference. First operand 55763 states and 251072 transitions. Second operand  has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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)
[2022-02-15 13:21:09,290 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:21:09,290 INFO  L93              Difference]: Finished difference Result 57519 states and 257238 transitions.
[2022-02-15 13:21:09,291 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:21:09,291 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 31
[2022-02-15 13:21:09,291 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:21:09,785 INFO  L225             Difference]: With dead ends: 57519
[2022-02-15 13:21:09,785 INFO  L226             Difference]: Without dead ends: 57055
[2022-02-15 13:21:09,785 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 11 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:21:09,785 INFO  L933         BasicCegarLoop]: 29 mSDtfsCounter, 83 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:21:09,785 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 217 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:21:09,841 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57055 states.
[2022-02-15 13:21:11,203 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57055 to 56239.
[2022-02-15 13:21:11,277 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56239 states, 56238 states have (on average 4.491767132543831) internal successors, (252608), 56238 states have internal predecessors, (252608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:11,592 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56239 states to 56239 states and 252608 transitions.
[2022-02-15 13:21:11,592 INFO  L78                 Accepts]: Start accepts. Automaton has 56239 states and 252608 transitions. Word has length 31
[2022-02-15 13:21:11,592 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:21:11,592 INFO  L470      AbstractCegarLoop]: Abstraction has 56239 states and 252608 transitions.
[2022-02-15 13:21:11,592 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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)
[2022-02-15 13:21:11,592 INFO  L276                IsEmpty]: Start isEmpty. Operand 56239 states and 252608 transitions.
[2022-02-15 13:21:11,751 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:21:11,751 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:21:11,751 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:21:11,767 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0
[2022-02-15 13:21:11,966 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88
[2022-02-15 13:21:11,967 INFO  L402      AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:21:11,967 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:21:11,967 INFO  L85        PathProgramCache]: Analyzing trace with hash 948873901, now seen corresponding path program 11 times
[2022-02-15 13:21:11,967 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:21:11,967 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628141551]
[2022-02-15 13:21:11,967 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:21:11,967 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:21:11,972 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:21:12,035 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:21:12,035 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:21:12,035 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628141551]
[2022-02-15 13:21:12,035 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628141551] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:21:12,035 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124312587]
[2022-02-15 13:21:12,035 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:21:12,035 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:12,035 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:21:12,036 INFO  L229       MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:21:12,037 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process
[2022-02-15 13:21:12,059 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s)
[2022-02-15 13:21:12,060 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:21:12,060 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:21:12,060 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:21:12,643 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:12,643 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:21:12,794 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:21:12,795 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124312587] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:21:12,795 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:21:12,795 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 9
[2022-02-15 13:21:12,795 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086602718]
[2022-02-15 13:21:12,795 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:21:12,795 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:21:12,795 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:21:12,795 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:21:12,795 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:21:12,795 INFO  L87              Difference]: Start difference. First operand 56239 states and 252608 transitions. Second operand  has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:13,547 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:21:13,547 INFO  L93              Difference]: Finished difference Result 57673 states and 257758 transitions.
[2022-02-15 13:21:13,548 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2022-02-15 13:21:13,548 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 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 31
[2022-02-15 13:21:13,548 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:21:13,981 INFO  L225             Difference]: With dead ends: 57673
[2022-02-15 13:21:13,982 INFO  L226             Difference]: Without dead ends: 57311
[2022-02-15 13:21:13,982 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 11 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:21:13,982 INFO  L933         BasicCegarLoop]: 30 mSDtfsCounter, 90 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:21:13,982 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 168 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:21:14,034 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57311 states.
[2022-02-15 13:21:15,444 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57311 to 56439.
[2022-02-15 13:21:15,539 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56439 states, 56438 states have (on average 4.494454091215139) internal successors, (253658), 56438 states have internal predecessors, (253658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:15,824 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56439 states to 56439 states and 253658 transitions.
[2022-02-15 13:21:15,824 INFO  L78                 Accepts]: Start accepts. Automaton has 56439 states and 253658 transitions. Word has length 31
[2022-02-15 13:21:15,825 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:21:15,825 INFO  L470      AbstractCegarLoop]: Abstraction has 56439 states and 253658 transitions.
[2022-02-15 13:21:15,825 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:15,825 INFO  L276                IsEmpty]: Start isEmpty. Operand 56439 states and 253658 transitions.
[2022-02-15 13:21:16,013 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:21:16,014 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:21:16,014 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:21:16,032 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0
[2022-02-15 13:21:16,227 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89
[2022-02-15 13:21:16,227 INFO  L402      AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:21:16,228 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:21:16,228 INFO  L85        PathProgramCache]: Analyzing trace with hash -847330975, now seen corresponding path program 12 times
[2022-02-15 13:21:16,228 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:21:16,228 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58926254]
[2022-02-15 13:21:16,228 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:21:16,228 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:21:16,241 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:21:16,710 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:16,711 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:21:16,711 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58926254]
[2022-02-15 13:21:16,711 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58926254] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:21:16,712 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482283928]
[2022-02-15 13:21:16,712 INFO  L93    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-02-15 13:21:16,712 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:16,712 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:21:16,720 INFO  L229       MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:21:16,747 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process
[2022-02-15 13:21:16,761 INFO  L228   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s)
[2022-02-15 13:21:16,761 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:21:16,761 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:21:16,762 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:21:17,113 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:17,113 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:21:17,246 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:17,247 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [482283928] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:21:17,247 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:21:17,247 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 9
[2022-02-15 13:21:17,247 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139847968]
[2022-02-15 13:21:17,247 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:21:17,247 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:21:17,247 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:21:17,247 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:21:17,247 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:21:17,247 INFO  L87              Difference]: Start difference. First operand 56439 states and 253658 transitions. Second operand  has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:18,144 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:21:18,144 INFO  L93              Difference]: Finished difference Result 58399 states and 261040 transitions.
[2022-02-15 13:21:18,144 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2022-02-15 13:21:18,144 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 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 31
[2022-02-15 13:21:18,145 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:21:18,460 INFO  L225             Difference]: With dead ends: 58399
[2022-02-15 13:21:18,460 INFO  L226             Difference]: Without dead ends: 58007
[2022-02-15 13:21:18,460 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 11 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:21:18,460 INFO  L933         BasicCegarLoop]: 27 mSDtfsCounter, 74 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:21:18,460 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 133 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:21:18,524 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58007 states.
[2022-02-15 13:21:19,961 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58007 to 56971.
[2022-02-15 13:21:20,059 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56971 states, 56970 states have (on average 4.493487800596806) internal successors, (255994), 56970 states have internal predecessors, (255994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:20,354 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56971 states to 56971 states and 255994 transitions.
[2022-02-15 13:21:20,354 INFO  L78                 Accepts]: Start accepts. Automaton has 56971 states and 255994 transitions. Word has length 31
[2022-02-15 13:21:20,354 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:21:20,354 INFO  L470      AbstractCegarLoop]: Abstraction has 56971 states and 255994 transitions.
[2022-02-15 13:21:20,354 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:20,354 INFO  L276                IsEmpty]: Start isEmpty. Operand 56971 states and 255994 transitions.
[2022-02-15 13:21:20,833 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:21:20,834 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:21:20,834 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:21:20,850 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0
[2022-02-15 13:21:21,047 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:21,047 INFO  L402      AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:21:21,048 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:21:21,048 INFO  L85        PathProgramCache]: Analyzing trace with hash -642090763, now seen corresponding path program 13 times
[2022-02-15 13:21:21,048 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:21:21,048 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521145584]
[2022-02-15 13:21:21,048 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:21:21,048 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:21:21,054 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:21:21,129 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:21,129 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:21:21,129 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521145584]
[2022-02-15 13:21:21,129 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521145584] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:21:21,130 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217338088]
[2022-02-15 13:21:21,130 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2022-02-15 13:21:21,130 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:21,130 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:21:21,131 INFO  L229       MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:21:21,133 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process
[2022-02-15 13:21:21,158 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:21:21,160 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:21:21,161 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:21:21,494 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:21,494 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:21:21,658 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:21,658 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [217338088] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:21:21,658 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:21:21,658 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 10
[2022-02-15 13:21:21,658 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214485983]
[2022-02-15 13:21:21,658 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:21:21,659 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:21:21,659 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:21:21,659 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:21:21,659 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:21:21,659 INFO  L87              Difference]: Start difference. First operand 56971 states and 255994 transitions. Second operand  has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:22,819 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:21:22,819 INFO  L93              Difference]: Finished difference Result 59527 states and 265352 transitions.
[2022-02-15 13:21:22,819 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:21:22,819 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 31
[2022-02-15 13:21:22,819 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:21:23,133 INFO  L225             Difference]: With dead ends: 59527
[2022-02-15 13:21:23,133 INFO  L226             Difference]: Without dead ends: 58923
[2022-02-15 13:21:23,134 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 10 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:21:23,151 INFO  L933         BasicCegarLoop]: 30 mSDtfsCounter, 92 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 13:21:23,151 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 222 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 13:21:23,227 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58923 states.
[2022-02-15 13:21:24,659 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58923 to 56299.
[2022-02-15 13:21:24,755 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56299 states, 56298 states have (on average 4.497069167643611) internal successors, (253176), 56298 states have internal predecessors, (253176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:25,410 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56299 states to 56299 states and 253176 transitions.
[2022-02-15 13:21:25,410 INFO  L78                 Accepts]: Start accepts. Automaton has 56299 states and 253176 transitions. Word has length 31
[2022-02-15 13:21:25,410 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:21:25,410 INFO  L470      AbstractCegarLoop]: Abstraction has 56299 states and 253176 transitions.
[2022-02-15 13:21:25,410 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:25,411 INFO  L276                IsEmpty]: Start isEmpty. Operand 56299 states and 253176 transitions.
[2022-02-15 13:21:25,644 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:21:25,645 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:21:25,645 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:21:25,663 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0
[2022-02-15 13:21:25,847 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:25,847 INFO  L402      AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:21:25,847 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:21:25,847 INFO  L85        PathProgramCache]: Analyzing trace with hash -1723749211, now seen corresponding path program 14 times
[2022-02-15 13:21:25,847 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:21:25,847 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177993377]
[2022-02-15 13:21:25,847 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:21:25,848 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:21:25,851 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:21:25,955 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:21:25,955 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:21:25,955 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177993377]
[2022-02-15 13:21:25,955 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177993377] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:21:25,955 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569844864]
[2022-02-15 13:21:25,955 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:21:25,956 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:25,956 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:21:25,957 INFO  L229       MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:21:25,958 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process
[2022-02-15 13:21:25,979 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:21:25,979 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:21:25,979 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:21:25,980 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:21:26,316 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:26,316 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:21:26,475 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:21:26,476 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [569844864] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:21:26,476 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:21:26,476 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 8
[2022-02-15 13:21:26,476 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27331755]
[2022-02-15 13:21:26,476 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:21:26,476 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-02-15 13:21:26,476 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:21:26,476 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-02-15 13:21:26,476 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2022-02-15 13:21:26,476 INFO  L87              Difference]: Start difference. First operand 56299 states and 253176 transitions. Second operand  has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:27,667 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:21:27,668 INFO  L93              Difference]: Finished difference Result 57119 states and 256248 transitions.
[2022-02-15 13:21:27,668 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2022-02-15 13:21:27,668 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31
[2022-02-15 13:21:27,668 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:21:28,070 INFO  L225             Difference]: With dead ends: 57119
[2022-02-15 13:21:28,070 INFO  L226             Difference]: Without dead ends: 56923
[2022-02-15 13:21:28,070 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 13 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2022-02-15 13:21:28,070 INFO  L933         BasicCegarLoop]: 25 mSDtfsCounter, 63 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:21:28,071 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 138 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:21:28,144 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 56923 states.
[2022-02-15 13:21:29,656 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 56923 to 56637.
[2022-02-15 13:21:29,750 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56637 states, 56636 states have (on average 4.496044918426443) internal successors, (254638), 56636 states have internal predecessors, (254638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:30,330 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56637 states to 56637 states and 254638 transitions.
[2022-02-15 13:21:30,330 INFO  L78                 Accepts]: Start accepts. Automaton has 56637 states and 254638 transitions. Word has length 31
[2022-02-15 13:21:30,330 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:21:30,330 INFO  L470      AbstractCegarLoop]: Abstraction has 56637 states and 254638 transitions.
[2022-02-15 13:21:30,330 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:30,330 INFO  L276                IsEmpty]: Start isEmpty. Operand 56637 states and 254638 transitions.
[2022-02-15 13:21:30,523 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:21:30,523 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:21:30,524 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:21:30,539 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0
[2022-02-15 13:21:30,724 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:30,724 INFO  L402      AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:21:30,725 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:21:30,725 INFO  L85        PathProgramCache]: Analyzing trace with hash -2056401095, now seen corresponding path program 15 times
[2022-02-15 13:21:30,725 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:21:30,725 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632092367]
[2022-02-15 13:21:30,725 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:21:30,725 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:21:30,728 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:21:30,801 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:30,801 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:21:30,801 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632092367]
[2022-02-15 13:21:30,801 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632092367] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:21:30,801 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956123578]
[2022-02-15 13:21:30,801 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:21:30,801 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:30,802 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:21:30,802 INFO  L229       MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:21:30,803 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process
[2022-02-15 13:21:30,824 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2022-02-15 13:21:30,825 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:21:30,825 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:21:30,825 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:21:31,168 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:31,168 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:21:31,305 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:31,305 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956123578] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:21:31,305 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:21:31,305 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 9
[2022-02-15 13:21:31,305 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315982612]
[2022-02-15 13:21:31,305 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:21:31,305 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:21:31,305 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:21:31,305 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:21:31,306 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:21:31,306 INFO  L87              Difference]: Start difference. First operand 56637 states and 254638 transitions. Second operand  has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:32,382 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:21:32,382 INFO  L93              Difference]: Finished difference Result 58909 states and 263376 transitions.
[2022-02-15 13:21:32,383 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2022-02-15 13:21:32,383 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31
[2022-02-15 13:21:32,383 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:21:32,754 INFO  L225             Difference]: With dead ends: 58909
[2022-02-15 13:21:32,754 INFO  L226             Difference]: Without dead ends: 58565
[2022-02-15 13:21:32,754 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:21:32,754 INFO  L933         BasicCegarLoop]: 26 mSDtfsCounter, 72 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:21:32,754 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 153 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:21:32,827 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58565 states.
[2022-02-15 13:21:34,720 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58565 to 57247.
[2022-02-15 13:21:34,818 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 57247 states, 57246 states have (on average 4.4951961709115045) internal successors, (257332), 57246 states have internal predecessors, (257332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:35,503 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57247 states to 57247 states and 257332 transitions.
[2022-02-15 13:21:35,503 INFO  L78                 Accepts]: Start accepts. Automaton has 57247 states and 257332 transitions. Word has length 31
[2022-02-15 13:21:35,504 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:21:35,504 INFO  L470      AbstractCegarLoop]: Abstraction has 57247 states and 257332 transitions.
[2022-02-15 13:21:35,504 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:35,504 INFO  L276                IsEmpty]: Start isEmpty. Operand 57247 states and 257332 transitions.
[2022-02-15 13:21:35,694 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:21:35,695 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:21:35,695 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:21:35,712 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0
[2022-02-15 13:21:35,900 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:35,901 INFO  L402      AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:21:35,901 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:21:35,901 INFO  L85        PathProgramCache]: Analyzing trace with hash 1754347509, now seen corresponding path program 16 times
[2022-02-15 13:21:35,901 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:21:35,901 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236875513]
[2022-02-15 13:21:35,901 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:21:35,901 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:21:35,904 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:21:35,982 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:35,982 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:21:35,983 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236875513]
[2022-02-15 13:21:35,983 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236875513] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:21:35,983 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207218343]
[2022-02-15 13:21:35,983 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:21:35,983 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:35,983 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:21:35,984 INFO  L229       MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:21:35,985 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process
[2022-02-15 13:21:36,005 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:21:36,006 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:21:36,006 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:21:36,007 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:21:36,345 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:36,345 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:21:36,488 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:36,488 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [207218343] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:21:36,488 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:21:36,488 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 10
[2022-02-15 13:21:36,488 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248282127]
[2022-02-15 13:21:36,488 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:21:36,489 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:21:36,489 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:21:36,489 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:21:36,489 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:21:36,489 INFO  L87              Difference]: Start difference. First operand 57247 states and 257332 transitions. Second operand  has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:37,617 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:21:37,617 INFO  L93              Difference]: Finished difference Result 59115 states and 263810 transitions.
[2022-02-15 13:21:37,618 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:21:37,618 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31
[2022-02-15 13:21:37,618 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:21:37,904 INFO  L225             Difference]: With dead ends: 59115
[2022-02-15 13:21:37,905 INFO  L226             Difference]: Without dead ends: 58527
[2022-02-15 13:21:37,905 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 11 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:21:37,905 INFO  L933         BasicCegarLoop]: 29 mSDtfsCounter, 89 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:21:37,905 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 196 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:21:38,180 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58527 states.
[2022-02-15 13:21:39,384 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58527 to 56075.
[2022-02-15 13:21:39,481 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56075 states, 56074 states have (on average 4.494632093305275) internal successors, (252032), 56074 states have internal predecessors, (252032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:39,935 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56075 states to 56075 states and 252032 transitions.
[2022-02-15 13:21:39,935 INFO  L78                 Accepts]: Start accepts. Automaton has 56075 states and 252032 transitions. Word has length 31
[2022-02-15 13:21:39,935 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:21:39,935 INFO  L470      AbstractCegarLoop]: Abstraction has 56075 states and 252032 transitions.
[2022-02-15 13:21:39,935 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:39,935 INFO  L276                IsEmpty]: Start isEmpty. Operand 56075 states and 252032 transitions.
[2022-02-15 13:21:40,096 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:21:40,096 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:21:40,096 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:21:40,113 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0
[2022-02-15 13:21:40,298 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:40,298 INFO  L402      AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:21:40,299 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:21:40,299 INFO  L85        PathProgramCache]: Analyzing trace with hash 1119130149, now seen corresponding path program 17 times
[2022-02-15 13:21:40,299 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:21:40,299 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68189712]
[2022-02-15 13:21:40,299 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:21:40,299 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:21:40,302 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:21:40,378 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:21:40,378 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:21:40,379 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68189712]
[2022-02-15 13:21:40,379 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68189712] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:21:40,379 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786322500]
[2022-02-15 13:21:40,379 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:21:40,379 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:40,379 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:21:40,389 INFO  L229       MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:21:40,389 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process
[2022-02-15 13:21:40,411 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s)
[2022-02-15 13:21:40,411 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:21:40,411 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:21:40,412 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:21:41,100 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:41,100 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:21:41,279 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:21:41,279 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [786322500] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:21:41,279 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:21:41,279 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 10
[2022-02-15 13:21:41,279 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335613087]
[2022-02-15 13:21:41,279 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:21:41,279 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:21:41,279 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:21:41,280 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:21:41,280 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:21:41,280 INFO  L87              Difference]: Start difference. First operand 56075 states and 252032 transitions. Second operand  has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:42,267 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:21:42,267 INFO  L93              Difference]: Finished difference Result 58567 states and 261228 transitions.
[2022-02-15 13:21:42,269 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:21:42,269 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 31
[2022-02-15 13:21:42,269 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:21:42,546 INFO  L225             Difference]: With dead ends: 58567
[2022-02-15 13:21:42,547 INFO  L226             Difference]: Without dead ends: 58151
[2022-02-15 13:21:42,547 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 10 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:21:42,547 INFO  L933         BasicCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:21:42,547 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 177 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:21:42,609 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58151 states.
[2022-02-15 13:21:44,116 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58151 to 56555.
[2022-02-15 13:21:44,223 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56555 states, 56554 states have (on average 4.4922728719453975) internal successors, (254056), 56554 states have internal predecessors, (254056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:44,501 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56555 states to 56555 states and 254056 transitions.
[2022-02-15 13:21:44,502 INFO  L78                 Accepts]: Start accepts. Automaton has 56555 states and 254056 transitions. Word has length 31
[2022-02-15 13:21:44,502 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:21:44,502 INFO  L470      AbstractCegarLoop]: Abstraction has 56555 states and 254056 transitions.
[2022-02-15 13:21:44,502 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:44,502 INFO  L276                IsEmpty]: Start isEmpty. Operand 56555 states and 254056 transitions.
[2022-02-15 13:21:44,998 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:21:44,998 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:21:44,998 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:21:45,030 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0
[2022-02-15 13:21:45,215 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95
[2022-02-15 13:21:45,215 INFO  L402      AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:21:45,216 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:21:45,216 INFO  L85        PathProgramCache]: Analyzing trace with hash -970438819, now seen corresponding path program 18 times
[2022-02-15 13:21:45,216 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:21:45,216 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120798949]
[2022-02-15 13:21:45,217 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:21:45,217 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:21:45,223 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:21:45,323 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:21:45,323 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:21:45,323 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120798949]
[2022-02-15 13:21:45,324 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120798949] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:21:45,324 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424728231]
[2022-02-15 13:21:45,324 INFO  L93    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-02-15 13:21:45,324 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:45,324 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:21:45,325 INFO  L229       MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:21:45,326 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process
[2022-02-15 13:21:45,346 INFO  L228   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s)
[2022-02-15 13:21:45,347 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:21:45,347 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:21:45,348 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:21:45,706 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:45,707 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:21:45,849 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:21:45,849 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424728231] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:21:45,849 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:21:45,849 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 11
[2022-02-15 13:21:45,849 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947746703]
[2022-02-15 13:21:45,849 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:21:45,850 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-02-15 13:21:45,850 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:21:45,850 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-02-15 13:21:45,850 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132
[2022-02-15 13:21:45,850 INFO  L87              Difference]: Start difference. First operand 56555 states and 254056 transitions. Second operand  has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:47,001 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:21:47,001 INFO  L93              Difference]: Finished difference Result 59058 states and 263018 transitions.
[2022-02-15 13:21:47,002 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2022-02-15 13:21:47,002 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 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 31
[2022-02-15 13:21:47,002 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:21:47,295 INFO  L225             Difference]: With dead ends: 59058
[2022-02-15 13:21:47,295 INFO  L226             Difference]: Without dead ends: 58562
[2022-02-15 13:21:47,296 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 10 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132
[2022-02-15 13:21:47,296 INFO  L933         BasicCegarLoop]: 32 mSDtfsCounter, 87 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 13:21:47,296 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 245 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 13:21:47,366 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58562 states.
[2022-02-15 13:21:48,849 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58562 to 56518.
[2022-02-15 13:21:48,946 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56518 states, 56517 states have (on average 4.484562167135552) internal successors, (253454), 56517 states have internal predecessors, (253454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:49,566 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56518 states to 56518 states and 253454 transitions.
[2022-02-15 13:21:49,566 INFO  L78                 Accepts]: Start accepts. Automaton has 56518 states and 253454 transitions. Word has length 31
[2022-02-15 13:21:49,566 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:21:49,566 INFO  L470      AbstractCegarLoop]: Abstraction has 56518 states and 253454 transitions.
[2022-02-15 13:21:49,567 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:49,567 INFO  L276                IsEmpty]: Start isEmpty. Operand 56518 states and 253454 transitions.
[2022-02-15 13:21:49,752 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:21:49,753 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:21:49,753 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:21:49,768 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0
[2022-02-15 13:21:49,967 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96
[2022-02-15 13:21:49,967 INFO  L402      AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:21:49,968 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:21:49,968 INFO  L85        PathProgramCache]: Analyzing trace with hash -1172911963, now seen corresponding path program 19 times
[2022-02-15 13:21:49,968 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:21:49,968 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799359033]
[2022-02-15 13:21:49,968 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:21:49,968 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:21:49,971 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:21:50,032 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2022-02-15 13:21:50,032 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:21:50,032 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799359033]
[2022-02-15 13:21:50,032 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799359033] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:21:50,034 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347855504]
[2022-02-15 13:21:50,034 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2022-02-15 13:21:50,034 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:50,034 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:21:50,035 INFO  L229       MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:21:50,036 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process
[2022-02-15 13:21:50,053 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:21:50,054 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:21:50,055 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:21:50,456 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:50,456 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:21:50,584 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2022-02-15 13:21:50,584 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [347855504] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:21:50,584 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:21:50,584 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 10
[2022-02-15 13:21:50,584 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883781152]
[2022-02-15 13:21:50,584 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:21:50,585 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:21:50,585 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:21:50,585 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:21:50,585 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:21:50,585 INFO  L87              Difference]: Start difference. First operand 56518 states and 253454 transitions. Second operand  has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:51,831 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:21:51,831 INFO  L93              Difference]: Finished difference Result 59706 states and 264868 transitions.
[2022-02-15 13:21:51,832 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:21:51,832 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 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 31
[2022-02-15 13:21:51,832 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:21:52,189 INFO  L225             Difference]: With dead ends: 59706
[2022-02-15 13:21:52,189 INFO  L226             Difference]: Without dead ends: 59062
[2022-02-15 13:21:52,189 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:21:52,189 INFO  L933         BasicCegarLoop]: 34 mSDtfsCounter, 104 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 13:21:52,190 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 245 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 13:21:52,266 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 59062 states.
[2022-02-15 13:21:53,698 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 59062 to 56790.
[2022-02-15 13:21:53,792 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56790 states, 56789 states have (on average 4.4874183380584265) internal successors, (254836), 56789 states have internal predecessors, (254836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:54,330 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56790 states to 56790 states and 254836 transitions.
[2022-02-15 13:21:54,330 INFO  L78                 Accepts]: Start accepts. Automaton has 56790 states and 254836 transitions. Word has length 31
[2022-02-15 13:21:54,330 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:21:54,331 INFO  L470      AbstractCegarLoop]: Abstraction has 56790 states and 254836 transitions.
[2022-02-15 13:21:54,331 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:54,331 INFO  L276                IsEmpty]: Start isEmpty. Operand 56790 states and 254836 transitions.
[2022-02-15 13:21:54,520 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:21:54,521 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:21:54,521 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:21:54,536 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0
[2022-02-15 13:21:54,730 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:54,730 INFO  L402      AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:21:54,731 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:21:54,731 INFO  L85        PathProgramCache]: Analyzing trace with hash -1348270123, now seen corresponding path program 20 times
[2022-02-15 13:21:54,731 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:21:54,731 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141835931]
[2022-02-15 13:21:54,731 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:21:54,731 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:21:54,734 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:21:54,807 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:21:54,807 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:21:54,807 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141835931]
[2022-02-15 13:21:54,807 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141835931] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:21:54,808 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025049433]
[2022-02-15 13:21:54,808 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:21:54,808 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:54,808 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:21:54,809 INFO  L229       MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:21:54,810 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process
[2022-02-15 13:21:54,837 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:21:54,837 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:21:54,839 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:21:54,839 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:21:55,280 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:21:55,280 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:21:55,429 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:21:55,429 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025049433] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:21:55,429 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:21:55,429 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 10
[2022-02-15 13:21:55,429 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494819431]
[2022-02-15 13:21:55,430 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:21:55,430 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:21:55,430 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:21:55,430 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:21:55,430 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:21:55,430 INFO  L87              Difference]: Start difference. First operand 56790 states and 254836 transitions. Second operand  has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:56,530 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:21:56,530 INFO  L93              Difference]: Finished difference Result 58350 states and 260490 transitions.
[2022-02-15 13:21:56,530 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:21:56,530 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 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 31
[2022-02-15 13:21:56,531 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:21:57,037 INFO  L225             Difference]: With dead ends: 58350
[2022-02-15 13:21:57,037 INFO  L226             Difference]: Without dead ends: 58038
[2022-02-15 13:21:57,037 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:21:57,038 INFO  L933         BasicCegarLoop]: 31 mSDtfsCounter, 86 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 13:21:57,038 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 158 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 13:21:57,091 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58038 states.
[2022-02-15 13:21:58,572 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58038 to 57176.
[2022-02-15 13:21:58,672 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 57176 states, 57175 states have (on average 4.48661128115435) internal successors, (256522), 57175 states have internal predecessors, (256522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:58,959 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57176 states to 57176 states and 256522 transitions.
[2022-02-15 13:21:58,959 INFO  L78                 Accepts]: Start accepts. Automaton has 57176 states and 256522 transitions. Word has length 31
[2022-02-15 13:21:58,959 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:21:58,960 INFO  L470      AbstractCegarLoop]: Abstraction has 57176 states and 256522 transitions.
[2022-02-15 13:21:58,960 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:21:58,960 INFO  L276                IsEmpty]: Start isEmpty. Operand 57176 states and 256522 transitions.
[2022-02-15 13:21:59,134 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:21:59,135 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:21:59,135 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:21:59,157 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0
[2022-02-15 13:21:59,356 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:59,356 INFO  L402      AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:21:59,356 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:21:59,356 INFO  L85        PathProgramCache]: Analyzing trace with hash -2013633551, now seen corresponding path program 21 times
[2022-02-15 13:21:59,356 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:21:59,356 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338519777]
[2022-02-15 13:21:59,356 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:21:59,357 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:21:59,369 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:21:59,446 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:21:59,446 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:21:59,446 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338519777]
[2022-02-15 13:21:59,446 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338519777] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:21:59,446 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487529628]
[2022-02-15 13:21:59,447 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:21:59,448 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:21:59,448 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:21:59,455 INFO  L229       MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:21:59,463 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process
[2022-02-15 13:21:59,480 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s)
[2022-02-15 13:21:59,481 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:21:59,481 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:21:59,482 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:22:00,241 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:00,241 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:22:00,367 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:22:00,368 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [487529628] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:22:00,368 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:22:00,368 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 11
[2022-02-15 13:22:00,368 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102671555]
[2022-02-15 13:22:00,368 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:22:00,368 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-02-15 13:22:00,368 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:22:00,368 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-02-15 13:22:00,368 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132
[2022-02-15 13:22:00,369 INFO  L87              Difference]: Start difference. First operand 57176 states and 256522 transitions. Second operand  has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:01,521 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:22:01,522 INFO  L93              Difference]: Finished difference Result 60248 states and 267546 transitions.
[2022-02-15 13:22:01,522 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2022-02-15 13:22:01,522 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 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 31
[2022-02-15 13:22:01,522 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:22:01,965 INFO  L225             Difference]: With dead ends: 60248
[2022-02-15 13:22:01,965 INFO  L226             Difference]: Without dead ends: 59632
[2022-02-15 13:22:01,965 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 11 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132
[2022-02-15 13:22:01,965 INFO  L933         BasicCegarLoop]: 34 mSDtfsCounter, 105 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 13:22:01,965 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 233 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 13:22:02,040 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 59632 states.
[2022-02-15 13:22:03,499 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 59632 to 56602.
[2022-02-15 13:22:03,595 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56602 states, 56601 states have (on average 4.489920672779633) internal successors, (254134), 56601 states have internal predecessors, (254134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:04,180 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56602 states to 56602 states and 254134 transitions.
[2022-02-15 13:22:04,181 INFO  L78                 Accepts]: Start accepts. Automaton has 56602 states and 254134 transitions. Word has length 31
[2022-02-15 13:22:04,181 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:22:04,181 INFO  L470      AbstractCegarLoop]: Abstraction has 56602 states and 254134 transitions.
[2022-02-15 13:22:04,181 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:04,181 INFO  L276                IsEmpty]: Start isEmpty. Operand 56602 states and 254134 transitions.
[2022-02-15 13:22:04,389 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:22:04,389 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:22:04,389 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:22:04,406 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0
[2022-02-15 13:22:04,595 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:22:04,595 INFO  L402      AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:22:04,596 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:22:04,596 INFO  L85        PathProgramCache]: Analyzing trace with hash 1818124897, now seen corresponding path program 22 times
[2022-02-15 13:22:04,596 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:22:04,596 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271827565]
[2022-02-15 13:22:04,596 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:22:04,596 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:22:04,599 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:22:04,676 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2022-02-15 13:22:04,676 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:22:04,676 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271827565]
[2022-02-15 13:22:04,676 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271827565] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:22:04,676 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998721961]
[2022-02-15 13:22:04,676 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:22:04,676 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:22:04,676 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:22:04,677 INFO  L229       MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:22:04,678 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process
[2022-02-15 13:22:04,704 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:22:04,704 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:22:04,705 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:22:04,706 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:22:05,111 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:05,111 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:22:05,272 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2022-02-15 13:22:05,272 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998721961] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:22:05,272 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:22:05,272 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 9
[2022-02-15 13:22:05,272 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355081712]
[2022-02-15 13:22:05,273 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:22:05,273 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:22:05,273 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:22:05,273 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:22:05,273 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:22:05,273 INFO  L87              Difference]: Start difference. First operand 56602 states and 254134 transitions. Second operand  has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:06,285 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:22:06,285 INFO  L93              Difference]: Finished difference Result 57870 states and 258758 transitions.
[2022-02-15 13:22:06,285 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2022-02-15 13:22:06,286 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31
[2022-02-15 13:22:06,286 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:22:06,631 INFO  L225             Difference]: With dead ends: 57870
[2022-02-15 13:22:06,631 INFO  L226             Difference]: Without dead ends: 57590
[2022-02-15 13:22:06,631 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 13 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:22:06,632 INFO  L933         BasicCegarLoop]: 29 mSDtfsCounter, 76 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:22:06,632 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 140 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:22:06,700 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57590 states.
[2022-02-15 13:22:08,091 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57590 to 57018.
[2022-02-15 13:22:08,184 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 57018 states, 57017 states have (on average 4.488836662749706) internal successors, (255940), 57017 states have internal predecessors, (255940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:08,697 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57018 states to 57018 states and 255940 transitions.
[2022-02-15 13:22:08,697 INFO  L78                 Accepts]: Start accepts. Automaton has 57018 states and 255940 transitions. Word has length 31
[2022-02-15 13:22:08,697 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:22:08,698 INFO  L470      AbstractCegarLoop]: Abstraction has 57018 states and 255940 transitions.
[2022-02-15 13:22:08,698 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:08,698 INFO  L276                IsEmpty]: Start isEmpty. Operand 57018 states and 255940 transitions.
[2022-02-15 13:22:08,893 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:22:08,893 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:22:08,893 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:22:08,911 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0
[2022-02-15 13:22:09,103 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100
[2022-02-15 13:22:09,104 INFO  L402      AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:22:09,104 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:22:09,104 INFO  L85        PathProgramCache]: Analyzing trace with hash 275400525, now seen corresponding path program 23 times
[2022-02-15 13:22:09,104 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:22:09,104 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521272775]
[2022-02-15 13:22:09,104 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:22:09,104 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:22:09,107 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:22:09,204 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:22:09,205 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:22:09,205 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521272775]
[2022-02-15 13:22:09,205 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521272775] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:22:09,205 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87221153]
[2022-02-15 13:22:09,205 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:22:09,205 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:22:09,205 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:22:09,207 INFO  L229       MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:22:09,207 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process
[2022-02-15 13:22:09,233 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s)
[2022-02-15 13:22:09,233 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:22:09,235 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:22:09,236 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:22:09,732 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:09,732 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:22:09,853 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:22:09,854 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [87221153] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:22:09,854 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:22:09,854 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 10
[2022-02-15 13:22:09,854 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664752258]
[2022-02-15 13:22:09,854 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:22:09,854 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:22:09,854 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:22:09,854 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:22:09,855 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:22:09,855 INFO  L87              Difference]: Start difference. First operand 57018 states and 255940 transitions. Second operand  has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:11,044 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:22:11,044 INFO  L93              Difference]: Finished difference Result 59614 states and 265266 transitions.
[2022-02-15 13:22:11,045 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:22:11,045 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31
[2022-02-15 13:22:11,045 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:22:11,564 INFO  L225             Difference]: With dead ends: 59614
[2022-02-15 13:22:11,564 INFO  L226             Difference]: Without dead ends: 59022
[2022-02-15 13:22:11,564 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 11 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:22:11,565 INFO  L933         BasicCegarLoop]: 32 mSDtfsCounter, 94 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:22:11,565 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 213 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:22:11,635 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 59022 states.
[2022-02-15 13:22:13,095 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 59022 to 56886.
[2022-02-15 13:22:13,162 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56886 states, 56885 states have (on average 4.493416542146436) internal successors, (255608), 56885 states have internal predecessors, (255608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:13,498 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56886 states to 56886 states and 255608 transitions.
[2022-02-15 13:22:13,499 INFO  L78                 Accepts]: Start accepts. Automaton has 56886 states and 255608 transitions. Word has length 31
[2022-02-15 13:22:13,499 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:22:13,499 INFO  L470      AbstractCegarLoop]: Abstraction has 56886 states and 255608 transitions.
[2022-02-15 13:22:13,499 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:13,499 INFO  L276                IsEmpty]: Start isEmpty. Operand 56886 states and 255608 transitions.
[2022-02-15 13:22:13,660 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:22:13,660 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:22:13,660 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:22:13,678 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0
[2022-02-15 13:22:13,872 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101
[2022-02-15 13:22:13,873 INFO  L402      AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:22:13,874 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:22:13,874 INFO  L85        PathProgramCache]: Analyzing trace with hash 1711494417, now seen corresponding path program 24 times
[2022-02-15 13:22:13,874 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:22:13,874 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600171832]
[2022-02-15 13:22:13,874 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:22:13,874 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:22:13,877 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:22:13,975 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:22:13,975 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:22:13,975 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600171832]
[2022-02-15 13:22:13,975 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600171832] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:22:13,975 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837033590]
[2022-02-15 13:22:13,975 INFO  L93    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-02-15 13:22:13,975 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:22:13,975 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:22:13,976 INFO  L229       MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:22:13,978 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process
[2022-02-15 13:22:13,998 INFO  L228   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s)
[2022-02-15 13:22:13,998 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:22:13,999 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:22:13,999 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:22:14,793 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:14,794 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:22:14,888 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:22:14,888 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837033590] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:22:14,888 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:22:14,888 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 11
[2022-02-15 13:22:14,888 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126416882]
[2022-02-15 13:22:14,888 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:22:14,888 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-02-15 13:22:14,888 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:22:14,891 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-02-15 13:22:14,891 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132
[2022-02-15 13:22:14,891 INFO  L87              Difference]: Start difference. First operand 56886 states and 255608 transitions. Second operand  has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:15,915 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:22:15,915 INFO  L93              Difference]: Finished difference Result 59402 states and 264498 transitions.
[2022-02-15 13:22:15,916 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2022-02-15 13:22:15,916 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31
[2022-02-15 13:22:15,916 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:22:16,227 INFO  L225             Difference]: With dead ends: 59402
[2022-02-15 13:22:16,227 INFO  L226             Difference]: Without dead ends: 58902
[2022-02-15 13:22:16,228 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 10 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132
[2022-02-15 13:22:16,228 INFO  L933         BasicCegarLoop]: 32 mSDtfsCounter, 94 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:22:16,228 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 245 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:22:16,312 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58902 states.
[2022-02-15 13:22:17,808 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58902 to 56162.
[2022-02-15 13:22:17,897 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56162 states, 56161 states have (on average 4.491622300172717) internal successors, (252254), 56161 states have internal predecessors, (252254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:18,421 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56162 states to 56162 states and 252254 transitions.
[2022-02-15 13:22:18,422 INFO  L78                 Accepts]: Start accepts. Automaton has 56162 states and 252254 transitions. Word has length 31
[2022-02-15 13:22:18,422 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:22:18,422 INFO  L470      AbstractCegarLoop]: Abstraction has 56162 states and 252254 transitions.
[2022-02-15 13:22:18,422 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:18,422 INFO  L276                IsEmpty]: Start isEmpty. Operand 56162 states and 252254 transitions.
[2022-02-15 13:22:18,615 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:22:18,616 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:22:18,616 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:22:18,632 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0
[2022-02-15 13:22:18,831 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102
[2022-02-15 13:22:18,831 INFO  L402      AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:22:18,831 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:22:18,831 INFO  L85        PathProgramCache]: Analyzing trace with hash -844078751, now seen corresponding path program 38 times
[2022-02-15 13:22:18,831 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:22:18,831 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167856802]
[2022-02-15 13:22:18,831 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:22:18,831 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:22:18,834 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:22:18,879 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:22:18,879 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:22:18,879 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167856802]
[2022-02-15 13:22:18,879 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167856802] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:22:18,879 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312416937]
[2022-02-15 13:22:18,879 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:22:18,879 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:22:18,879 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:22:18,880 INFO  L229       MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:22:18,881 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process
[2022-02-15 13:22:18,901 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:22:18,901 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:22:18,901 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:22:18,902 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:22:19,413 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:19,413 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:22:19,505 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:22:19,506 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [312416937] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:22:19,506 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:22:19,506 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 10
[2022-02-15 13:22:19,506 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154243256]
[2022-02-15 13:22:19,506 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:22:19,506 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:22:19,506 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:22:19,507 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:22:19,507 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:22:19,507 INFO  L87              Difference]: Start difference. First operand 56162 states and 252254 transitions. Second operand  has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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)
[2022-02-15 13:22:20,683 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:22:20,683 INFO  L93              Difference]: Finished difference Result 59091 states and 262890 transitions.
[2022-02-15 13:22:20,683 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:22:20,683 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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 31
[2022-02-15 13:22:20,683 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:22:21,183 INFO  L225             Difference]: With dead ends: 59091
[2022-02-15 13:22:21,183 INFO  L226             Difference]: Without dead ends: 58955
[2022-02-15 13:22:21,184 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 10 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:22:21,184 INFO  L933         BasicCegarLoop]: 39 mSDtfsCounter, 136 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 13:22:21,184 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 254 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 13:22:21,231 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58955 states.
[2022-02-15 13:22:22,750 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58955 to 56590.
[2022-02-15 13:22:22,838 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56590 states, 56589 states have (on average 4.489706480057961) internal successors, (254068), 56589 states have internal predecessors, (254068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:23,100 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56590 states to 56590 states and 254068 transitions.
[2022-02-15 13:22:23,101 INFO  L78                 Accepts]: Start accepts. Automaton has 56590 states and 254068 transitions. Word has length 31
[2022-02-15 13:22:23,101 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:22:23,101 INFO  L470      AbstractCegarLoop]: Abstraction has 56590 states and 254068 transitions.
[2022-02-15 13:22:23,101 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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)
[2022-02-15 13:22:23,101 INFO  L276                IsEmpty]: Start isEmpty. Operand 56590 states and 254068 transitions.
[2022-02-15 13:22:23,254 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:22:23,254 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:22:23,254 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:22:23,271 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0
[2022-02-15 13:22:23,467 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103
[2022-02-15 13:22:23,468 INFO  L402      AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:22:23,468 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:22:23,468 INFO  L85        PathProgramCache]: Analyzing trace with hash 1607875169, now seen corresponding path program 25 times
[2022-02-15 13:22:23,468 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:22:23,468 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891774649]
[2022-02-15 13:22:23,468 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:22:23,468 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:22:23,484 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:22:23,587 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:23,587 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:22:23,587 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891774649]
[2022-02-15 13:22:23,587 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891774649] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:22:23,587 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096548218]
[2022-02-15 13:22:23,587 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2022-02-15 13:22:23,587 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:22:23,587 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:22:23,588 INFO  L229       MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:22:23,589 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process
[2022-02-15 13:22:23,609 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:22:23,610 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:22:23,610 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:22:24,200 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:24,200 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:22:24,308 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:24,308 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096548218] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:22:24,308 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:22:24,308 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 10
[2022-02-15 13:22:24,308 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541170162]
[2022-02-15 13:22:24,309 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:22:24,309 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:22:24,309 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:22:24,309 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:22:24,309 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:22:24,309 INFO  L87              Difference]: Start difference. First operand 56590 states and 254068 transitions. Second operand  has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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)
[2022-02-15 13:22:25,298 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:22:25,298 INFO  L93              Difference]: Finished difference Result 58466 states and 260628 transitions.
[2022-02-15 13:22:25,298 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:22:25,298 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 31
[2022-02-15 13:22:25,298 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:22:25,638 INFO  L225             Difference]: With dead ends: 58466
[2022-02-15 13:22:25,638 INFO  L226             Difference]: Without dead ends: 57978
[2022-02-15 13:22:25,639 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 11 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:22:25,639 INFO  L933         BasicCegarLoop]: 30 mSDtfsCounter, 84 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:22:25,639 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 224 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:22:25,703 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57978 states.
[2022-02-15 13:22:27,149 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57978 to 57226.
[2022-02-15 13:22:27,262 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 57226 states, 57225 states have (on average 4.477483617300131) internal successors, (256224), 57225 states have internal predecessors, (256224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:27,567 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57226 states to 57226 states and 256224 transitions.
[2022-02-15 13:22:27,567 INFO  L78                 Accepts]: Start accepts. Automaton has 57226 states and 256224 transitions. Word has length 31
[2022-02-15 13:22:27,567 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:22:27,567 INFO  L470      AbstractCegarLoop]: Abstraction has 57226 states and 256224 transitions.
[2022-02-15 13:22:27,567 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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)
[2022-02-15 13:22:27,567 INFO  L276                IsEmpty]: Start isEmpty. Operand 57226 states and 256224 transitions.
[2022-02-15 13:22:28,073 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:22:28,073 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:22:28,073 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:22:28,089 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0
[2022-02-15 13:22:28,289 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:22:28,289 INFO  L402      AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:22:28,290 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:22:28,290 INFO  L85        PathProgramCache]: Analyzing trace with hash -1028420631, now seen corresponding path program 26 times
[2022-02-15 13:22:28,290 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:22:28,290 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763893319]
[2022-02-15 13:22:28,290 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:22:28,290 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:22:28,293 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:22:28,377 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:22:28,377 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:22:28,377 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763893319]
[2022-02-15 13:22:28,378 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763893319] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:22:28,378 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234819382]
[2022-02-15 13:22:28,378 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:22:28,378 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:22:28,378 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:22:28,379 INFO  L229       MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:22:28,389 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process
[2022-02-15 13:22:28,402 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:22:28,402 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:22:28,403 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:22:28,403 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:22:28,758 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:28,758 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:22:28,856 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:22:28,856 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [234819382] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:22:28,856 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:22:28,856 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 10
[2022-02-15 13:22:28,856 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54579920]
[2022-02-15 13:22:28,856 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:22:28,856 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:22:28,856 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:22:28,857 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:22:28,857 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:22:28,857 INFO  L87              Difference]: Start difference. First operand 57226 states and 256224 transitions. Second operand  has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:29,851 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:22:29,851 INFO  L93              Difference]: Finished difference Result 59296 states and 263623 transitions.
[2022-02-15 13:22:29,851 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:22:29,851 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 31
[2022-02-15 13:22:29,851 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:22:30,186 INFO  L225             Difference]: With dead ends: 59296
[2022-02-15 13:22:30,187 INFO  L226             Difference]: Without dead ends: 58728
[2022-02-15 13:22:30,187 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:22:30,187 INFO  L933         BasicCegarLoop]: 32 mSDtfsCounter, 95 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:22:30,187 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 210 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:22:30,249 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58728 states.
[2022-02-15 13:22:31,782 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58728 to 57536.
[2022-02-15 13:22:31,904 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 57536 states, 57535 states have (on average 4.477570174676284) internal successors, (257617), 57535 states have internal predecessors, (257617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:32,698 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57536 states to 57536 states and 257617 transitions.
[2022-02-15 13:22:32,698 INFO  L78                 Accepts]: Start accepts. Automaton has 57536 states and 257617 transitions. Word has length 31
[2022-02-15 13:22:32,699 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:22:32,699 INFO  L470      AbstractCegarLoop]: Abstraction has 57536 states and 257617 transitions.
[2022-02-15 13:22:32,699 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:32,699 INFO  L276                IsEmpty]: Start isEmpty. Operand 57536 states and 257617 transitions.
[2022-02-15 13:22:32,984 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:22:32,984 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:22:32,984 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:22:33,027 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0
[2022-02-15 13:22:33,199 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105
[2022-02-15 13:22:33,200 INFO  L402      AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:22:33,200 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:22:33,200 INFO  L85        PathProgramCache]: Analyzing trace with hash -547667103, now seen corresponding path program 27 times
[2022-02-15 13:22:33,200 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:22:33,200 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817826445]
[2022-02-15 13:22:33,200 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:22:33,200 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:22:33,203 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:22:33,318 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:22:33,318 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:22:33,318 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817826445]
[2022-02-15 13:22:33,318 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817826445] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:22:33,318 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957048755]
[2022-02-15 13:22:33,319 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:22:33,319 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:22:33,319 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:22:33,336 INFO  L229       MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:22:33,337 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process
[2022-02-15 13:22:33,359 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s)
[2022-02-15 13:22:33,359 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:22:33,360 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:22:33,360 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:22:33,810 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:33,810 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:22:33,997 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:22:33,997 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [957048755] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:22:33,997 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:22:33,997 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 9
[2022-02-15 13:22:33,997 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971146062]
[2022-02-15 13:22:33,997 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:22:33,997 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:22:33,997 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:22:33,998 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:22:33,998 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:22:33,998 INFO  L87              Difference]: Start difference. First operand 57536 states and 257617 transitions. Second operand  has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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)
[2022-02-15 13:22:35,027 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:22:35,027 INFO  L93              Difference]: Finished difference Result 59752 states and 266049 transitions.
[2022-02-15 13:22:35,027 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2022-02-15 13:22:35,028 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 31
[2022-02-15 13:22:35,028 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:22:35,370 INFO  L225             Difference]: With dead ends: 59752
[2022-02-15 13:22:35,370 INFO  L226             Difference]: Without dead ends: 59408
[2022-02-15 13:22:35,370 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 13 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:22:35,370 INFO  L933         BasicCegarLoop]: 26 mSDtfsCounter, 67 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:22:35,370 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 151 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:22:35,457 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 59408 states.
[2022-02-15 13:22:36,980 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 59408 to 58236.
[2022-02-15 13:22:37,088 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 58236 states, 58235 states have (on average 4.475744826994076) internal successors, (260645), 58235 states have internal predecessors, (260645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:37,693 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 58236 states to 58236 states and 260645 transitions.
[2022-02-15 13:22:37,693 INFO  L78                 Accepts]: Start accepts. Automaton has 58236 states and 260645 transitions. Word has length 31
[2022-02-15 13:22:37,693 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:22:37,693 INFO  L470      AbstractCegarLoop]: Abstraction has 58236 states and 260645 transitions.
[2022-02-15 13:22:37,694 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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)
[2022-02-15 13:22:37,694 INFO  L276                IsEmpty]: Start isEmpty. Operand 58236 states and 260645 transitions.
[2022-02-15 13:22:37,857 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:22:37,857 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:22:37,857 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:22:37,873 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0
[2022-02-15 13:22:38,071 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:22:38,072 INFO  L402      AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:22:38,072 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:22:38,072 INFO  L85        PathProgramCache]: Analyzing trace with hash -342426891, now seen corresponding path program 28 times
[2022-02-15 13:22:38,072 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:22:38,072 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268521768]
[2022-02-15 13:22:38,072 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:22:38,072 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:22:38,076 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:22:38,166 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:38,166 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:22:38,166 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268521768]
[2022-02-15 13:22:38,167 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268521768] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:22:38,167 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831897311]
[2022-02-15 13:22:38,167 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:22:38,167 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:22:38,167 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:22:38,172 INFO  L229       MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:22:38,172 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process
[2022-02-15 13:22:38,192 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:22:38,192 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:22:38,193 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:22:38,193 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:22:38,648 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:38,648 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:22:38,775 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:38,775 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831897311] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:22:38,775 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:22:38,775 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 10
[2022-02-15 13:22:38,775 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190364562]
[2022-02-15 13:22:38,775 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:22:38,775 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:22:38,776 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:22:38,776 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:22:38,776 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:22:38,776 INFO  L87              Difference]: Start difference. First operand 58236 states and 260645 transitions. Second operand  has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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)
[2022-02-15 13:22:39,924 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:22:39,924 INFO  L93              Difference]: Finished difference Result 60992 states and 270781 transitions.
[2022-02-15 13:22:39,925 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:22:39,925 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 31
[2022-02-15 13:22:39,925 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:22:40,434 INFO  L225             Difference]: With dead ends: 60992
[2022-02-15 13:22:40,435 INFO  L226             Difference]: Without dead ends: 60500
[2022-02-15 13:22:40,435 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:22:40,435 INFO  L933         BasicCegarLoop]: 29 mSDtfsCounter, 84 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 13:22:40,435 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 214 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 13:22:40,496 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 60500 states.
[2022-02-15 13:22:42,072 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 60500 to 58344.
[2022-02-15 13:22:42,174 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 58344 states, 58343 states have (on average 4.473287283821538) internal successors, (260985), 58343 states have internal predecessors, (260985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:42,479 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 58344 states to 58344 states and 260985 transitions.
[2022-02-15 13:22:42,479 INFO  L78                 Accepts]: Start accepts. Automaton has 58344 states and 260985 transitions. Word has length 31
[2022-02-15 13:22:42,479 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:22:42,479 INFO  L470      AbstractCegarLoop]: Abstraction has 58344 states and 260985 transitions.
[2022-02-15 13:22:42,479 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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)
[2022-02-15 13:22:42,479 INFO  L276                IsEmpty]: Start isEmpty. Operand 58344 states and 260985 transitions.
[2022-02-15 13:22:43,026 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:22:43,027 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:22:43,027 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:22:43,044 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0
[2022-02-15 13:22:43,243 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:22:43,244 INFO  L402      AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:22:43,244 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:22:43,244 INFO  L85        PathProgramCache]: Analyzing trace with hash -407456723, now seen corresponding path program 29 times
[2022-02-15 13:22:43,244 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:22:43,244 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77869228]
[2022-02-15 13:22:43,244 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:22:43,244 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:22:43,247 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:22:43,327 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:22:43,328 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:22:43,328 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77869228]
[2022-02-15 13:22:43,328 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77869228] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:22:43,328 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728445721]
[2022-02-15 13:22:43,328 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:22:43,328 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:22:43,328 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:22:43,344 INFO  L229       MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:22:43,344 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process
[2022-02-15 13:22:43,365 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s)
[2022-02-15 13:22:43,366 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:22:43,366 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:22:43,367 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:22:43,724 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:43,724 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:22:43,873 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:22:43,873 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [728445721] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:22:43,873 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:22:43,873 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 10
[2022-02-15 13:22:43,873 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916360525]
[2022-02-15 13:22:43,873 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:22:43,873 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:22:43,873 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:22:43,874 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:22:43,874 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:22:43,874 INFO  L87              Difference]: Start difference. First operand 58344 states and 260985 transitions. Second operand  has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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)
[2022-02-15 13:22:44,916 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:22:44,917 INFO  L93              Difference]: Finished difference Result 59652 states and 265608 transitions.
[2022-02-15 13:22:44,917 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:22:44,917 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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 31
[2022-02-15 13:22:44,917 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:22:45,218 INFO  L225             Difference]: With dead ends: 59652
[2022-02-15 13:22:45,219 INFO  L226             Difference]: Without dead ends: 59238
[2022-02-15 13:22:45,219 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 10 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:22:45,219 INFO  L933         BasicCegarLoop]: 33 mSDtfsCounter, 104 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:22:45,219 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 193 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:22:45,287 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 59238 states.
[2022-02-15 13:22:46,772 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 59238 to 58262.
[2022-02-15 13:22:46,874 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 58262 states, 58261 states have (on average 4.478707883489813) internal successors, (260934), 58261 states have internal predecessors, (260934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:47,466 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 58262 states to 58262 states and 260934 transitions.
[2022-02-15 13:22:47,466 INFO  L78                 Accepts]: Start accepts. Automaton has 58262 states and 260934 transitions. Word has length 31
[2022-02-15 13:22:47,467 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:22:47,467 INFO  L470      AbstractCegarLoop]: Abstraction has 58262 states and 260934 transitions.
[2022-02-15 13:22:47,467 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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)
[2022-02-15 13:22:47,467 INFO  L276                IsEmpty]: Start isEmpty. Operand 58262 states and 260934 transitions.
[2022-02-15 13:22:47,646 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:22:47,646 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:22:47,647 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:22:47,664 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0
[2022-02-15 13:22:47,859 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:22:47,860 INFO  L402      AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:22:47,860 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:22:47,860 INFO  L85        PathProgramCache]: Analyzing trace with hash -1478595103, now seen corresponding path program 30 times
[2022-02-15 13:22:47,860 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:22:47,860 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563772293]
[2022-02-15 13:22:47,860 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:22:47,860 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:22:47,864 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:22:47,929 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:22:47,929 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:22:47,929 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563772293]
[2022-02-15 13:22:47,929 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563772293] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:22:47,929 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532617841]
[2022-02-15 13:22:47,929 INFO  L93    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-02-15 13:22:47,929 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:22:47,929 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:22:47,930 INFO  L229       MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:22:47,931 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process
[2022-02-15 13:22:47,952 INFO  L228   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s)
[2022-02-15 13:22:47,952 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:22:47,953 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:22:47,953 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:22:48,360 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:48,360 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:22:48,516 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:22:48,516 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532617841] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:22:48,516 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:22:48,516 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 10
[2022-02-15 13:22:48,516 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013913037]
[2022-02-15 13:22:48,516 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:22:48,517 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:22:48,517 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:22:48,517 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:22:48,517 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:22:48,517 INFO  L87              Difference]: Start difference. First operand 58262 states and 260934 transitions. Second operand  has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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)
[2022-02-15 13:22:49,556 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:22:49,556 INFO  L93              Difference]: Finished difference Result 61006 states and 271294 transitions.
[2022-02-15 13:22:49,557 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:22:49,557 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 31
[2022-02-15 13:22:49,557 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:22:49,818 INFO  L225             Difference]: With dead ends: 61006
[2022-02-15 13:22:49,818 INFO  L226             Difference]: Without dead ends: 60518
[2022-02-15 13:22:49,818 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:22:49,818 INFO  L933         BasicCegarLoop]: 29 mSDtfsCounter, 80 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:22:49,818 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 191 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:22:49,886 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 60518 states.
[2022-02-15 13:22:51,306 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 60518 to 59102.
[2022-02-15 13:22:51,404 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 59102 states, 59101 states have (on average 4.474340535693136) internal successors, (264438), 59101 states have internal predecessors, (264438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:52,054 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 59102 states to 59102 states and 264438 transitions.
[2022-02-15 13:22:52,055 INFO  L78                 Accepts]: Start accepts. Automaton has 59102 states and 264438 transitions. Word has length 31
[2022-02-15 13:22:52,055 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:22:52,055 INFO  L470      AbstractCegarLoop]: Abstraction has 59102 states and 264438 transitions.
[2022-02-15 13:22:52,055 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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)
[2022-02-15 13:22:52,055 INFO  L276                IsEmpty]: Start isEmpty. Operand 59102 states and 264438 transitions.
[2022-02-15 13:22:52,249 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:22:52,249 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:22:52,249 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:22:52,267 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0
[2022-02-15 13:22:52,450 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109
[2022-02-15 13:22:52,451 INFO  L402      AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:22:52,451 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:22:52,451 INFO  L85        PathProgramCache]: Analyzing trace with hash 1513778873, now seen corresponding path program 31 times
[2022-02-15 13:22:52,451 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:22:52,451 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104837915]
[2022-02-15 13:22:52,451 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:22:52,451 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:22:52,454 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:22:52,527 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:52,527 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:22:52,527 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104837915]
[2022-02-15 13:22:52,527 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104837915] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:22:52,528 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600966188]
[2022-02-15 13:22:52,528 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2022-02-15 13:22:52,528 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:22:52,528 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:22:52,529 INFO  L229       MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:22:52,530 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process
[2022-02-15 13:22:52,550 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:22:52,551 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:22:52,552 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:22:53,293 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:53,294 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:22:53,468 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:53,468 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [600966188] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:22:53,468 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:22:53,468 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 10
[2022-02-15 13:22:53,468 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550811290]
[2022-02-15 13:22:53,469 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:22:53,469 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:22:53,469 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:22:53,469 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:22:53,469 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:22:53,469 INFO  L87              Difference]: Start difference. First operand 59102 states and 264438 transitions. Second operand  has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:54,498 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:22:54,498 INFO  L93              Difference]: Finished difference Result 61926 states and 274644 transitions.
[2022-02-15 13:22:54,498 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:22:54,498 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 31
[2022-02-15 13:22:54,498 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:22:54,847 INFO  L225             Difference]: With dead ends: 61926
[2022-02-15 13:22:54,847 INFO  L226             Difference]: Without dead ends: 61334
[2022-02-15 13:22:54,848 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:22:54,848 INFO  L933         BasicCegarLoop]: 32 mSDtfsCounter, 97 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:22:54,848 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 210 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:22:54,918 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 61334 states.
[2022-02-15 13:22:56,491 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 61334 to 59758.
[2022-02-15 13:22:56,599 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 59758 states, 59757 states have (on average 4.472948775875629) internal successors, (267290), 59757 states have internal predecessors, (267290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:57,237 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 59758 states to 59758 states and 267290 transitions.
[2022-02-15 13:22:57,238 INFO  L78                 Accepts]: Start accepts. Automaton has 59758 states and 267290 transitions. Word has length 31
[2022-02-15 13:22:57,238 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:22:57,238 INFO  L470      AbstractCegarLoop]: Abstraction has 59758 states and 267290 transitions.
[2022-02-15 13:22:57,238 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:57,238 INFO  L276                IsEmpty]: Start isEmpty. Operand 59758 states and 267290 transitions.
[2022-02-15 13:22:57,443 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:22:57,443 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:22:57,443 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:22:57,462 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0
[2022-02-15 13:22:57,661 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:22:57,661 INFO  L402      AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:22:57,662 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:22:57,662 INFO  L85        PathProgramCache]: Analyzing trace with hash 1611215857, now seen corresponding path program 32 times
[2022-02-15 13:22:57,662 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:22:57,662 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455910743]
[2022-02-15 13:22:57,662 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:22:57,662 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:22:57,664 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:22:57,746 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:57,746 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:22:57,746 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455910743]
[2022-02-15 13:22:57,746 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455910743] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:22:57,746 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18545977]
[2022-02-15 13:22:57,746 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:22:57,746 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:22:57,746 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:22:57,747 INFO  L229       MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:22:57,758 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process
[2022-02-15 13:22:57,775 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:22:57,775 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:22:57,776 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:22:57,777 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:22:58,146 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:58,146 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:22:58,295 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:22:58,295 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [18545977] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:22:58,295 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:22:58,295 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 10
[2022-02-15 13:22:58,295 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899055305]
[2022-02-15 13:22:58,295 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:22:58,296 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:22:58,296 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:22:58,296 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:22:58,296 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:22:58,296 INFO  L87              Difference]: Start difference. First operand 59758 states and 267290 transitions. Second operand  has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:22:59,472 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:22:59,472 INFO  L93              Difference]: Finished difference Result 61736 states and 274450 transitions.
[2022-02-15 13:22:59,473 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:22:59,473 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 31
[2022-02-15 13:22:59,473 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:22:59,967 INFO  L225             Difference]: With dead ends: 61736
[2022-02-15 13:22:59,967 INFO  L226             Difference]: Without dead ends: 61198
[2022-02-15 13:22:59,974 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 10 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:22:59,974 INFO  L933         BasicCegarLoop]: 31 mSDtfsCounter, 96 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:22:59,974 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 226 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:23:00,044 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 61198 states.
[2022-02-15 13:23:01,654 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 61198 to 59694.
[2022-02-15 13:23:01,761 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 59694 states, 59693 states have (on average 4.476203239910878) internal successors, (267198), 59693 states have internal predecessors, (267198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:02,444 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 59694 states to 59694 states and 267198 transitions.
[2022-02-15 13:23:02,444 INFO  L78                 Accepts]: Start accepts. Automaton has 59694 states and 267198 transitions. Word has length 31
[2022-02-15 13:23:02,445 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:23:02,445 INFO  L470      AbstractCegarLoop]: Abstraction has 59694 states and 267198 transitions.
[2022-02-15 13:23:02,445 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:02,445 INFO  L276                IsEmpty]: Start isEmpty. Operand 59694 states and 267198 transitions.
[2022-02-15 13:23:02,780 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:23:02,781 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:23:02,781 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:23:02,798 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0
[2022-02-15 13:23:02,996 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:23:02,996 INFO  L402      AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:23:02,996 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:23:02,997 INFO  L85        PathProgramCache]: Analyzing trace with hash -748846751, now seen corresponding path program 33 times
[2022-02-15 13:23:02,997 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:23:02,997 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449825672]
[2022-02-15 13:23:02,997 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:23:02,997 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:23:03,000 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:23:03,066 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:23:03,066 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:23:03,066 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449825672]
[2022-02-15 13:23:03,066 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449825672] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:23:03,066 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097282654]
[2022-02-15 13:23:03,066 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:23:03,066 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:23:03,066 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:23:03,088 INFO  L229       MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:23:03,147 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process
[2022-02-15 13:23:03,165 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2022-02-15 13:23:03,165 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:23:03,165 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:23:03,166 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:23:03,541 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:03,541 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:23:03,750 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:23:03,750 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097282654] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:23:03,750 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:23:03,750 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 8
[2022-02-15 13:23:03,750 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951336297]
[2022-02-15 13:23:03,750 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:23:03,751 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-02-15 13:23:03,751 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:23:03,751 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-02-15 13:23:03,751 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2022-02-15 13:23:03,751 INFO  L87              Difference]: Start difference. First operand 59694 states and 267198 transitions. Second operand  has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:05,078 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:23:05,079 INFO  L93              Difference]: Finished difference Result 60634 states and 270764 transitions.
[2022-02-15 13:23:05,079 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2022-02-15 13:23:05,079 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31
[2022-02-15 13:23:05,079 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:23:05,442 INFO  L225             Difference]: With dead ends: 60634
[2022-02-15 13:23:05,442 INFO  L226             Difference]: Without dead ends: 60486
[2022-02-15 13:23:05,442 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2022-02-15 13:23:05,443 INFO  L933         BasicCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:23:05,443 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 125 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:23:05,519 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 60486 states.
[2022-02-15 13:23:07,009 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 60486 to 60106.
[2022-02-15 13:23:07,109 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 60106 states, 60105 states have (on average 4.475667581731969) internal successors, (269010), 60105 states have internal predecessors, (269010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:07,606 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 60106 states to 60106 states and 269010 transitions.
[2022-02-15 13:23:07,606 INFO  L78                 Accepts]: Start accepts. Automaton has 60106 states and 269010 transitions. Word has length 31
[2022-02-15 13:23:07,606 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:23:07,606 INFO  L470      AbstractCegarLoop]: Abstraction has 60106 states and 269010 transitions.
[2022-02-15 13:23:07,607 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:07,607 INFO  L276                IsEmpty]: Start isEmpty. Operand 60106 states and 269010 transitions.
[2022-02-15 13:23:07,782 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:23:07,782 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:23:07,782 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:23:07,799 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0
[2022-02-15 13:23:07,998 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112
[2022-02-15 13:23:07,998 INFO  L402      AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:23:07,998 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:23:07,999 INFO  L85        PathProgramCache]: Analyzing trace with hash -543606539, now seen corresponding path program 34 times
[2022-02-15 13:23:07,999 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:23:07,999 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239725974]
[2022-02-15 13:23:07,999 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:23:07,999 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:23:08,002 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:23:08,075 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:08,075 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:23:08,075 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239725974]
[2022-02-15 13:23:08,075 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239725974] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:23:08,075 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049731889]
[2022-02-15 13:23:08,075 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:23:08,076 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:23:08,076 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:23:08,077 INFO  L229       MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:23:08,077 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process
[2022-02-15 13:23:08,099 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:23:08,099 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:23:08,099 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:23:08,100 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:23:08,740 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:08,741 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:23:08,866 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:08,866 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049731889] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:23:08,866 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:23:08,866 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 9
[2022-02-15 13:23:08,866 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562598436]
[2022-02-15 13:23:08,866 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:23:08,867 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:23:08,867 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:23:08,867 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:23:08,867 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:23:08,867 INFO  L87              Difference]: Start difference. First operand 60106 states and 269010 transitions. Second operand  has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:09,755 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:23:09,755 INFO  L93              Difference]: Finished difference Result 61878 states and 275610 transitions.
[2022-02-15 13:23:09,767 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2022-02-15 13:23:09,767 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31
[2022-02-15 13:23:09,767 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:23:10,105 INFO  L225             Difference]: With dead ends: 61878
[2022-02-15 13:23:10,105 INFO  L226             Difference]: Without dead ends: 61434
[2022-02-15 13:23:10,105 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 11 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:23:10,106 INFO  L933         BasicCegarLoop]: 26 mSDtfsCounter, 74 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:23:10,106 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 133 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:23:10,173 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 61434 states.
[2022-02-15 13:23:11,774 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 61434 to 60270.
[2022-02-15 13:23:11,882 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 60270 states, 60269 states have (on average 4.47284673712854) internal successors, (269574), 60269 states have internal predecessors, (269574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:12,208 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 60270 states to 60270 states and 269574 transitions.
[2022-02-15 13:23:12,209 INFO  L78                 Accepts]: Start accepts. Automaton has 60270 states and 269574 transitions. Word has length 31
[2022-02-15 13:23:12,209 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:23:12,209 INFO  L470      AbstractCegarLoop]: Abstraction has 60270 states and 269574 transitions.
[2022-02-15 13:23:12,209 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:12,209 INFO  L276                IsEmpty]: Start isEmpty. Operand 60270 states and 269574 transitions.
[2022-02-15 13:23:12,717 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:23:12,717 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:23:12,717 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:23:12,733 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0
[2022-02-15 13:23:12,933 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113
[2022-02-15 13:23:12,934 INFO  L402      AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:23:12,934 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:23:12,934 INFO  L85        PathProgramCache]: Analyzing trace with hash -772548551, now seen corresponding path program 35 times
[2022-02-15 13:23:12,934 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:23:12,934 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964927468]
[2022-02-15 13:23:12,934 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:23:12,934 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:23:12,937 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:23:13,019 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:13,020 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:23:13,020 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964927468]
[2022-02-15 13:23:13,020 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964927468] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:23:13,020 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7159991]
[2022-02-15 13:23:13,020 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:23:13,020 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:23:13,020 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:23:13,036 INFO  L229       MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:23:13,038 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process
[2022-02-15 13:23:13,058 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s)
[2022-02-15 13:23:13,059 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:23:13,059 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:23:13,059 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:23:13,453 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:13,453 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:23:13,557 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:13,557 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [7159991] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:23:13,557 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:23:13,557 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 10
[2022-02-15 13:23:13,557 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391080412]
[2022-02-15 13:23:13,557 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:23:13,558 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:23:13,558 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:23:13,558 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:23:13,558 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:23:13,558 INFO  L87              Difference]: Start difference. First operand 60270 states and 269574 transitions. Second operand  has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:14,699 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:23:14,700 INFO  L93              Difference]: Finished difference Result 62022 states and 275690 transitions.
[2022-02-15 13:23:14,700 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:23:14,700 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31
[2022-02-15 13:23:14,700 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:23:15,036 INFO  L225             Difference]: With dead ends: 62022
[2022-02-15 13:23:15,036 INFO  L226             Difference]: Without dead ends: 61470
[2022-02-15 13:23:15,036 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 11 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:23:15,036 INFO  L933         BasicCegarLoop]: 30 mSDtfsCounter, 92 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:23:15,036 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 226 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:23:15,118 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 61470 states.
[2022-02-15 13:23:16,576 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 61470 to 59542.
[2022-02-15 13:23:16,953 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 59542 states, 59541 states have (on average 4.473589627315631) internal successors, (266362), 59541 states have internal predecessors, (266362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:17,349 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 59542 states to 59542 states and 266362 transitions.
[2022-02-15 13:23:17,349 INFO  L78                 Accepts]: Start accepts. Automaton has 59542 states and 266362 transitions. Word has length 31
[2022-02-15 13:23:17,349 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:23:17,349 INFO  L470      AbstractCegarLoop]: Abstraction has 59542 states and 266362 transitions.
[2022-02-15 13:23:17,349 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:17,349 INFO  L276                IsEmpty]: Start isEmpty. Operand 59542 states and 266362 transitions.
[2022-02-15 13:23:17,512 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:23:17,512 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:23:17,512 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:23:17,530 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0
[2022-02-15 13:23:17,717 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114
[2022-02-15 13:23:17,717 INFO  L402      AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:23:17,718 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:23:17,718 INFO  L85        PathProgramCache]: Analyzing trace with hash 1635941737, now seen corresponding path program 36 times
[2022-02-15 13:23:17,718 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:23:17,718 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810346563]
[2022-02-15 13:23:17,718 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:23:17,718 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:23:17,720 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:23:17,794 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:17,795 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:23:17,795 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810346563]
[2022-02-15 13:23:17,795 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810346563] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:23:17,795 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469617091]
[2022-02-15 13:23:17,795 INFO  L93    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-02-15 13:23:17,795 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:23:17,795 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:23:17,796 INFO  L229       MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:23:17,797 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process
[2022-02-15 13:23:17,818 INFO  L228   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s)
[2022-02-15 13:23:17,818 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:23:17,818 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:23:17,819 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:23:18,063 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:18,063 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:23:18,479 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:18,479 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [469617091] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:23:18,479 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:23:18,480 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 8
[2022-02-15 13:23:18,480 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235296460]
[2022-02-15 13:23:18,480 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:23:18,480 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-02-15 13:23:18,480 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:23:18,480 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-02-15 13:23:18,480 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2022-02-15 13:23:18,480 INFO  L87              Difference]: Start difference. First operand 59542 states and 266362 transitions. Second operand  has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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)
[2022-02-15 13:23:19,159 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:23:19,159 INFO  L93              Difference]: Finished difference Result 60802 states and 270854 transitions.
[2022-02-15 13:23:19,159 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2022-02-15 13:23:19,159 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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 31
[2022-02-15 13:23:19,159 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:23:19,693 INFO  L225             Difference]: With dead ends: 60802
[2022-02-15 13:23:19,694 INFO  L226             Difference]: Without dead ends: 60606
[2022-02-15 13:23:19,694 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 13 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2022-02-15 13:23:19,694 INFO  L933         BasicCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:23:19,694 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 141 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:23:19,762 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 60606 states.
[2022-02-15 13:23:21,443 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 60606 to 59794.
[2022-02-15 13:23:21,597 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 59794 states, 59793 states have (on average 4.473332998846018) internal successors, (267474), 59793 states have internal predecessors, (267474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:21,931 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 59794 states to 59794 states and 267474 transitions.
[2022-02-15 13:23:21,931 INFO  L78                 Accepts]: Start accepts. Automaton has 59794 states and 267474 transitions. Word has length 31
[2022-02-15 13:23:21,931 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:23:21,931 INFO  L470      AbstractCegarLoop]: Abstraction has 59794 states and 267474 transitions.
[2022-02-15 13:23:21,931 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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)
[2022-02-15 13:23:21,931 INFO  L276                IsEmpty]: Start isEmpty. Operand 59794 states and 267474 transitions.
[2022-02-15 13:23:22,646 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:23:22,646 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:23:22,646 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:23:22,665 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0
[2022-02-15 13:23:22,863 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:23:22,863 INFO  L402      AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:23:22,863 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:23:22,863 INFO  L85        PathProgramCache]: Analyzing trace with hash -690109279, now seen corresponding path program 37 times
[2022-02-15 13:23:22,863 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:23:22,863 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683895209]
[2022-02-15 13:23:22,863 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:23:22,864 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:23:22,866 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:23:22,928 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:22,928 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:23:22,928 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683895209]
[2022-02-15 13:23:22,928 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683895209] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:23:22,929 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544461308]
[2022-02-15 13:23:22,929 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2022-02-15 13:23:22,929 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:23:22,929 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:23:22,930 INFO  L229       MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:23:22,931 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process
[2022-02-15 13:23:22,951 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:23:22,951 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:23:22,956 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:23:23,270 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:23,270 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:23:23,429 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:23,429 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [544461308] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:23:23,429 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:23:23,429 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 9
[2022-02-15 13:23:23,429 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624261303]
[2022-02-15 13:23:23,429 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:23:23,429 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:23:23,429 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:23:23,430 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:23:23,430 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:23:23,430 INFO  L87              Difference]: Start difference. First operand 59794 states and 267474 transitions. Second operand  has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:24,482 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:23:24,482 INFO  L93              Difference]: Finished difference Result 62098 states and 276004 transitions.
[2022-02-15 13:23:24,482 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2022-02-15 13:23:24,482 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 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 31
[2022-02-15 13:23:24,483 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:23:24,799 INFO  L225             Difference]: With dead ends: 62098
[2022-02-15 13:23:24,799 INFO  L226             Difference]: Without dead ends: 61754
[2022-02-15 13:23:24,799 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:23:24,799 INFO  L933         BasicCegarLoop]: 26 mSDtfsCounter, 65 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:23:24,799 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 174 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:23:24,878 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 61754 states.
[2022-02-15 13:23:26,415 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 61754 to 60254.
[2022-02-15 13:23:26,524 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 60254 states, 60253 states have (on average 4.470150863857401) internal successors, (269340), 60253 states have internal predecessors, (269340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:27,091 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 60254 states to 60254 states and 269340 transitions.
[2022-02-15 13:23:27,091 INFO  L78                 Accepts]: Start accepts. Automaton has 60254 states and 269340 transitions. Word has length 31
[2022-02-15 13:23:27,091 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:23:27,091 INFO  L470      AbstractCegarLoop]: Abstraction has 60254 states and 269340 transitions.
[2022-02-15 13:23:27,091 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:27,091 INFO  L276                IsEmpty]: Start isEmpty. Operand 60254 states and 269340 transitions.
[2022-02-15 13:23:27,263 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:23:27,263 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:23:27,263 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:23:27,278 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0
[2022-02-15 13:23:27,478 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116
[2022-02-15 13:23:27,478 INFO  L402      AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:23:27,478 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:23:27,479 INFO  L85        PathProgramCache]: Analyzing trace with hash 1651042397, now seen corresponding path program 38 times
[2022-02-15 13:23:27,479 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:23:27,479 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145837892]
[2022-02-15 13:23:27,479 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:23:27,479 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:23:27,486 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:23:27,556 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:23:27,556 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:23:27,556 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145837892]
[2022-02-15 13:23:27,556 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145837892] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:23:27,556 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886129902]
[2022-02-15 13:23:27,556 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:23:27,556 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:23:27,556 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:23:27,557 INFO  L229       MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:23:27,559 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process
[2022-02-15 13:23:27,579 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:23:27,579 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:23:27,579 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:23:27,580 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:23:27,894 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:27,894 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:23:28,073 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:23:28,073 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886129902] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:23:28,074 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:23:28,074 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 10
[2022-02-15 13:23:28,074 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932978366]
[2022-02-15 13:23:28,074 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:23:28,074 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:23:28,074 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:23:28,074 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:23:28,074 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:23:28,074 INFO  L87              Difference]: Start difference. First operand 60254 states and 269340 transitions. Second operand  has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:29,214 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:23:29,215 INFO  L93              Difference]: Finished difference Result 62498 states and 277194 transitions.
[2022-02-15 13:23:29,215 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:23:29,215 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 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 31
[2022-02-15 13:23:29,215 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:23:29,549 INFO  L225             Difference]: With dead ends: 62498
[2022-02-15 13:23:29,549 INFO  L226             Difference]: Without dead ends: 62042
[2022-02-15 13:23:29,549 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 11 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:23:29,549 INFO  L933         BasicCegarLoop]: 29 mSDtfsCounter, 75 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 13:23:29,549 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 196 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 13:23:29,854 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 62042 states.
[2022-02-15 13:23:31,396 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 62042 to 60106.
[2022-02-15 13:23:31,479 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 60106 states, 60105 states have (on average 4.462690291989019) internal successors, (268230), 60105 states have internal predecessors, (268230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:32,141 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 60106 states to 60106 states and 268230 transitions.
[2022-02-15 13:23:32,141 INFO  L78                 Accepts]: Start accepts. Automaton has 60106 states and 268230 transitions. Word has length 31
[2022-02-15 13:23:32,142 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:23:32,142 INFO  L470      AbstractCegarLoop]: Abstraction has 60106 states and 268230 transitions.
[2022-02-15 13:23:32,142 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:32,142 INFO  L276                IsEmpty]: Start isEmpty. Operand 60106 states and 268230 transitions.
[2022-02-15 13:23:32,444 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:23:32,444 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:23:32,444 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:23:32,461 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0
[2022-02-15 13:23:32,659 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117
[2022-02-15 13:23:32,659 INFO  L402      AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:23:32,660 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:23:32,660 INFO  L85        PathProgramCache]: Analyzing trace with hash -705882519, now seen corresponding path program 39 times
[2022-02-15 13:23:32,660 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:23:32,660 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128896621]
[2022-02-15 13:23:32,660 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:23:32,660 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:23:32,663 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:23:32,775 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:23:32,775 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:23:32,776 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128896621]
[2022-02-15 13:23:32,776 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128896621] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:23:32,776 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908809535]
[2022-02-15 13:23:32,776 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:23:32,776 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:23:32,776 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:23:32,777 INFO  L229       MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:23:32,778 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process
[2022-02-15 13:23:32,799 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2022-02-15 13:23:32,799 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:23:32,800 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:23:32,800 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:23:33,239 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:33,240 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:23:33,427 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:23:33,428 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [908809535] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:23:33,428 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:23:33,428 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 11
[2022-02-15 13:23:33,428 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035131448]
[2022-02-15 13:23:33,428 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:23:33,428 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-02-15 13:23:33,428 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:23:33,428 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-02-15 13:23:33,428 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132
[2022-02-15 13:23:33,428 INFO  L87              Difference]: Start difference. First operand 60106 states and 268230 transitions. Second operand  has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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)
[2022-02-15 13:23:34,582 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:23:34,582 INFO  L93              Difference]: Finished difference Result 63006 states and 278934 transitions.
[2022-02-15 13:23:34,583 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2022-02-15 13:23:34,583 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 31
[2022-02-15 13:23:34,583 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:23:34,890 INFO  L225             Difference]: With dead ends: 63006
[2022-02-15 13:23:34,891 INFO  L226             Difference]: Without dead ends: 62418
[2022-02-15 13:23:34,891 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 10 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132
[2022-02-15 13:23:34,891 INFO  L933         BasicCegarLoop]: 32 mSDtfsCounter, 96 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 13:23:34,891 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 220 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 13:23:35,187 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 62418 states.
[2022-02-15 13:23:37,033 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 62418 to 57842.
[2022-02-15 13:23:37,169 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 57842 states, 57841 states have (on average 4.465794159852008) internal successors, (258306), 57841 states have internal predecessors, (258306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:37,487 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57842 states to 57842 states and 258306 transitions.
[2022-02-15 13:23:37,487 INFO  L78                 Accepts]: Start accepts. Automaton has 57842 states and 258306 transitions. Word has length 31
[2022-02-15 13:23:37,487 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:23:37,487 INFO  L470      AbstractCegarLoop]: Abstraction has 57842 states and 258306 transitions.
[2022-02-15 13:23:37,487 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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)
[2022-02-15 13:23:37,487 INFO  L276                IsEmpty]: Start isEmpty. Operand 57842 states and 258306 transitions.
[2022-02-15 13:23:37,658 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:23:37,658 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:23:37,658 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:23:37,678 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0
[2022-02-15 13:23:37,874 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118
[2022-02-15 13:23:37,875 INFO  L402      AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:23:37,875 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:23:37,875 INFO  L85        PathProgramCache]: Analyzing trace with hash -570103327, now seen corresponding path program 40 times
[2022-02-15 13:23:37,875 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:23:37,875 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392733323]
[2022-02-15 13:23:37,875 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:23:37,875 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:23:37,892 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:23:37,995 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:23:37,995 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:23:37,995 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392733323]
[2022-02-15 13:23:37,995 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392733323] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:23:37,996 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162001245]
[2022-02-15 13:23:37,996 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-02-15 13:23:37,996 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:23:37,996 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:23:37,997 INFO  L229       MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:23:37,998 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process
[2022-02-15 13:23:38,018 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-02-15 13:23:38,018 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:23:38,019 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:23:38,019 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:23:38,759 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:38,759 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:23:38,904 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:23:38,904 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162001245] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:23:38,904 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:23:38,904 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 9
[2022-02-15 13:23:38,904 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837122113]
[2022-02-15 13:23:38,904 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:23:38,905 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:23:38,905 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:23:38,905 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:23:38,905 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:23:38,905 INFO  L87              Difference]: Start difference. First operand 57842 states and 258306 transitions. Second operand  has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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)
[2022-02-15 13:23:39,902 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:23:39,902 INFO  L93              Difference]: Finished difference Result 59524 states and 264220 transitions.
[2022-02-15 13:23:39,902 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2022-02-15 13:23:39,902 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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 31
[2022-02-15 13:23:39,902 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:23:40,246 INFO  L225             Difference]: With dead ends: 59524
[2022-02-15 13:23:40,246 INFO  L226             Difference]: Without dead ends: 59226
[2022-02-15 13:23:40,246 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 13 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:23:40,246 INFO  L933         BasicCegarLoop]: 29 mSDtfsCounter, 76 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:23:40,246 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 169 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:23:40,316 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 59226 states.
[2022-02-15 13:23:41,784 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 59226 to 58158.
[2022-02-15 13:23:41,883 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 58158 states, 58157 states have (on average 4.4656017332393345) internal successors, (259706), 58157 states have internal predecessors, (259706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:42,473 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 58158 states to 58158 states and 259706 transitions.
[2022-02-15 13:23:42,474 INFO  L78                 Accepts]: Start accepts. Automaton has 58158 states and 259706 transitions. Word has length 31
[2022-02-15 13:23:42,474 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:23:42,474 INFO  L470      AbstractCegarLoop]: Abstraction has 58158 states and 259706 transitions.
[2022-02-15 13:23:42,474 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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)
[2022-02-15 13:23:42,474 INFO  L276                IsEmpty]: Start isEmpty. Operand 58158 states and 259706 transitions.
[2022-02-15 13:23:42,708 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:23:42,709 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:23:42,709 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:23:42,725 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0
[2022-02-15 13:23:42,910 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119
[2022-02-15 13:23:42,911 INFO  L402      AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:23:42,911 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:23:42,911 INFO  L85        PathProgramCache]: Analyzing trace with hash -953567319, now seen corresponding path program 41 times
[2022-02-15 13:23:42,911 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:23:42,911 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447178676]
[2022-02-15 13:23:42,911 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:23:42,911 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:23:42,914 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:23:42,983 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2022-02-15 13:23:42,983 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:23:42,983 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447178676]
[2022-02-15 13:23:42,983 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447178676] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:23:42,984 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977187432]
[2022-02-15 13:23:42,984 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-02-15 13:23:42,984 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:23:42,984 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:23:42,985 INFO  L229       MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:23:42,985 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process
[2022-02-15 13:23:43,007 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s)
[2022-02-15 13:23:43,007 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:23:43,008 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:23:43,008 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:23:43,435 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:43,435 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:23:43,537 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2022-02-15 13:23:43,537 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977187432] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:23:43,537 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:23:43,537 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 10
[2022-02-15 13:23:43,537 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008264342]
[2022-02-15 13:23:43,537 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:23:43,538 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:23:43,538 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:23:43,538 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:23:43,538 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:23:43,538 INFO  L87              Difference]: Start difference. First operand 58158 states and 259706 transitions. Second operand  has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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)
[2022-02-15 13:23:44,604 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:23:44,604 INFO  L93              Difference]: Finished difference Result 60678 states and 268598 transitions.
[2022-02-15 13:23:44,604 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:23:44,604 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 31
[2022-02-15 13:23:44,604 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:23:44,893 INFO  L225             Difference]: With dead ends: 60678
[2022-02-15 13:23:44,894 INFO  L226             Difference]: Without dead ends: 60134
[2022-02-15 13:23:44,894 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 11 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:23:44,894 INFO  L933         BasicCegarLoop]: 32 mSDtfsCounter, 91 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 13:23:44,894 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 234 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 13:23:45,156 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 60134 states.
[2022-02-15 13:23:46,730 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 60134 to 58122.
[2022-02-15 13:23:46,808 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 58122 states, 58121 states have (on average 4.4662342354742695) internal successors, (259582), 58121 states have internal predecessors, (259582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:47,140 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 58122 states to 58122 states and 259582 transitions.
[2022-02-15 13:23:47,140 INFO  L78                 Accepts]: Start accepts. Automaton has 58122 states and 259582 transitions. Word has length 31
[2022-02-15 13:23:47,140 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:23:47,140 INFO  L470      AbstractCegarLoop]: Abstraction has 58122 states and 259582 transitions.
[2022-02-15 13:23:47,140 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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)
[2022-02-15 13:23:47,140 INFO  L276                IsEmpty]: Start isEmpty. Operand 58122 states and 259582 transitions.
[2022-02-15 13:23:47,348 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:23:47,349 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:23:47,349 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:23:47,374 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0
[2022-02-15 13:23:47,560 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:23:47,561 INFO  L402      AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:23:47,561 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:23:47,561 INFO  L85        PathProgramCache]: Analyzing trace with hash 1534839253, now seen corresponding path program 42 times
[2022-02-15 13:23:47,561 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:23:47,564 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674364510]
[2022-02-15 13:23:47,564 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:23:47,564 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:23:47,568 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:23:47,661 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:23:47,661 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:23:47,661 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674364510]
[2022-02-15 13:23:47,662 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674364510] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:23:47,662 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710408868]
[2022-02-15 13:23:47,662 INFO  L93    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-02-15 13:23:47,662 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:23:47,662 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:23:47,676 INFO  L229       MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:23:47,723 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process
[2022-02-15 13:23:47,747 INFO  L228   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s)
[2022-02-15 13:23:47,748 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:23:47,748 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:23:47,749 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:23:48,539 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:48,539 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:23:48,703 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-02-15 13:23:48,703 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710408868] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:23:48,703 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:23:48,703 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 10
[2022-02-15 13:23:48,703 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793085942]
[2022-02-15 13:23:48,703 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:23:48,703 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 13:23:48,703 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:23:48,703 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 13:23:48,703 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:23:48,704 INFO  L87              Difference]: Start difference. First operand 58122 states and 259582 transitions. Second operand  has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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)
[2022-02-15 13:23:49,733 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:23:49,734 INFO  L93              Difference]: Finished difference Result 60354 states and 267844 transitions.
[2022-02-15 13:23:49,734 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-02-15 13:23:49,734 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 31
[2022-02-15 13:23:49,734 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:23:50,055 INFO  L225             Difference]: With dead ends: 60354
[2022-02-15 13:23:50,055 INFO  L226             Difference]: Without dead ends: 59994
[2022-02-15 13:23:50,055 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 10 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2022-02-15 13:23:50,055 INFO  L933         BasicCegarLoop]: 29 mSDtfsCounter, 72 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:23:50,055 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 194 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:23:50,122 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 59994 states.
[2022-02-15 13:23:51,611 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 59994 to 58674.
[2022-02-15 13:23:51,712 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 58674 states, 58673 states have (on average 4.463415881240094) internal successors, (261882), 58673 states have internal predecessors, (261882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:52,246 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 58674 states to 58674 states and 261882 transitions.
[2022-02-15 13:23:52,247 INFO  L78                 Accepts]: Start accepts. Automaton has 58674 states and 261882 transitions. Word has length 31
[2022-02-15 13:23:52,247 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:23:52,247 INFO  L470      AbstractCegarLoop]: Abstraction has 58674 states and 261882 transitions.
[2022-02-15 13:23:52,247 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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)
[2022-02-15 13:23:52,247 INFO  L276                IsEmpty]: Start isEmpty. Operand 58674 states and 261882 transitions.
[2022-02-15 13:23:52,425 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:23:52,425 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:23:52,425 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:23:52,441 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0
[2022-02-15 13:23:52,634 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:23:52,635 INFO  L402      AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:23:52,635 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:23:52,635 INFO  L85        PathProgramCache]: Analyzing trace with hash 869475825, now seen corresponding path program 43 times
[2022-02-15 13:23:52,635 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:23:52,635 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452191900]
[2022-02-15 13:23:52,635 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:23:52,635 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:23:52,638 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:23:52,728 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:23:52,729 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:23:52,729 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452191900]
[2022-02-15 13:23:52,729 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452191900] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:23:52,729 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748014378]
[2022-02-15 13:23:52,729 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2022-02-15 13:23:52,729 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:23:52,729 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:23:52,748 INFO  L229       MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:23:52,783 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:23:52,783 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:23:52,784 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:23:52,800 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process
[2022-02-15 13:23:53,203 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:53,203 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:23:53,319 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:23:53,320 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [748014378] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:23:53,320 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:23:53,320 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 11
[2022-02-15 13:23:53,320 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642742198]
[2022-02-15 13:23:53,320 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:23:53,320 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-02-15 13:23:53,320 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:23:53,320 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-02-15 13:23:53,320 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132
[2022-02-15 13:23:53,320 INFO  L87              Difference]: Start difference. First operand 58674 states and 261882 transitions. Second operand  has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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)
[2022-02-15 13:23:54,475 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:23:54,475 INFO  L93              Difference]: Finished difference Result 61446 states and 271688 transitions.
[2022-02-15 13:23:54,476 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2022-02-15 13:23:54,476 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 31
[2022-02-15 13:23:54,476 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:23:54,816 INFO  L225             Difference]: With dead ends: 61446
[2022-02-15 13:23:54,817 INFO  L226             Difference]: Without dead ends: 60954
[2022-02-15 13:23:54,817 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 10 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132
[2022-02-15 13:23:54,817 INFO  L933         BasicCegarLoop]: 32 mSDtfsCounter, 89 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:23:54,817 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 248 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:23:55,128 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 60954 states.
[2022-02-15 13:23:56,305 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 60954 to 57986.
[2022-02-15 13:23:56,396 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 57986 states, 57985 states have (on average 4.463119772354919) internal successors, (258794), 57985 states have internal predecessors, (258794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:23:56,903 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57986 states to 57986 states and 258794 transitions.
[2022-02-15 13:23:56,903 INFO  L78                 Accepts]: Start accepts. Automaton has 57986 states and 258794 transitions. Word has length 31
[2022-02-15 13:23:56,903 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:23:56,904 INFO  L470      AbstractCegarLoop]: Abstraction has 57986 states and 258794 transitions.
[2022-02-15 13:23:56,904 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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)
[2022-02-15 13:23:56,904 INFO  L276                IsEmpty]: Start isEmpty. Operand 57986 states and 258794 transitions.
[2022-02-15 13:23:57,068 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:23:57,068 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:23:57,068 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:23:57,084 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0
[2022-02-15 13:23:57,271 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122
[2022-02-15 13:23:57,271 INFO  L402      AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:23:57,271 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:23:57,271 INFO  L85        PathProgramCache]: Analyzing trace with hash 1982762149, now seen corresponding path program 44 times
[2022-02-15 13:23:57,271 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:23:57,271 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131562811]
[2022-02-15 13:23:57,271 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:23:57,271 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:23:57,274 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:23:57,343 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:57,343 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:23:57,343 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131562811]
[2022-02-15 13:23:57,343 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131562811] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:23:57,344 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760358872]
[2022-02-15 13:23:57,344 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-02-15 13:23:57,344 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:23:57,344 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:23:57,345 INFO  L229       MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:23:57,345 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process
[2022-02-15 13:23:57,364 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-02-15 13:23:57,364 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:23:57,365 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:23:57,365 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:23:57,978 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:57,978 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:23:58,144 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:23:58,144 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760358872] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:23:58,144 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:23:58,145 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 8
[2022-02-15 13:23:58,145 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948102523]
[2022-02-15 13:23:58,145 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:23:58,145 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-02-15 13:23:58,145 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:23:58,145 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-02-15 13:23:58,145 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2022-02-15 13:23:58,145 INFO  L87              Difference]: Start difference. First operand 57986 states and 258794 transitions. Second operand  has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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)
[2022-02-15 13:23:58,771 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:23:58,771 INFO  L93              Difference]: Finished difference Result 59134 states and 263166 transitions.
[2022-02-15 13:23:58,771 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2022-02-15 13:23:58,771 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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 31
[2022-02-15 13:23:58,771 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:23:59,247 INFO  L225             Difference]: With dead ends: 59134
[2022-02-15 13:23:59,247 INFO  L226             Difference]: Without dead ends: 58986
[2022-02-15 13:23:59,247 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2022-02-15 13:23:59,247 INFO  L933         BasicCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 13:23:59,247 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 117 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 13:23:59,313 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58986 states.
[2022-02-15 13:24:00,881 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58986 to 58506.
[2022-02-15 13:24:01,046 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 58506 states, 58505 states have (on average 4.462592940774293) internal successors, (261084), 58505 states have internal predecessors, (261084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-02-15 13:24:01,407 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 58506 states to 58506 states and 261084 transitions.
[2022-02-15 13:24:01,407 INFO  L78                 Accepts]: Start accepts. Automaton has 58506 states and 261084 transitions. Word has length 31
[2022-02-15 13:24:01,407 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-15 13:24:01,407 INFO  L470      AbstractCegarLoop]: Abstraction has 58506 states and 261084 transitions.
[2022-02-15 13:24:01,407 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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)
[2022-02-15 13:24:01,407 INFO  L276                IsEmpty]: Start isEmpty. Operand 58506 states and 261084 transitions.
[2022-02-15 13:24:02,046 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 13:24:02,046 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-15 13:24:02,046 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 13:24:02,062 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0
[2022-02-15 13:24:02,262 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123
[2022-02-15 13:24:02,262 INFO  L402      AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] ===
[2022-02-15 13:24:02,263 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 13:24:02,263 INFO  L85        PathProgramCache]: Analyzing trace with hash -106806819, now seen corresponding path program 45 times
[2022-02-15 13:24:02,263 INFO  L126   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-02-15 13:24:02,263 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733243074]
[2022-02-15 13:24:02,263 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 13:24:02,263 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 13:24:02,265 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 13:24:02,333 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:24:02,333 INFO  L144   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-02-15 13:24:02,333 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733243074]
[2022-02-15 13:24:02,333 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733243074] provided 0 perfect and 1 imperfect interpolant sequences
[2022-02-15 13:24:02,333 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231126266]
[2022-02-15 13:24:02,333 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-02-15 13:24:02,333 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-02-15 13:24:02,333 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 13:24:02,334 INFO  L229       MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-02-15 13:24:02,336 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process
[2022-02-15 13:24:02,356 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2022-02-15 13:24:02,356 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-02-15 13:24:02,357 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-02-15 13:24:02,357 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-02-15 13:24:02,722 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 13:24:02,722 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-02-15 13:24:02,884 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-02-15 13:24:02,884 INFO  L165   FreeRefinementEngine]: IpTcStrategyModuleZ3 [231126266] provided 0 perfect and 2 imperfect interpolant sequences
[2022-02-15 13:24:02,885 INFO  L191   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-02-15 13:24:02,885 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 9
[2022-02-15 13:24:02,885 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263663550]
[2022-02-15 13:24:02,885 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-02-15 13:24:02,885 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-02-15 13:24:02,885 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-02-15 13:24:02,886 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-02-15 13:24:02,886 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:24:02,886 INFO  L87              Difference]: Start difference. First operand 58506 states and 261084 transitions. Second operand  has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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)
[2022-02-15 13:24:04,029 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 13:24:04,029 INFO  L93              Difference]: Finished difference Result 60298 states and 267638 transitions.
[2022-02-15 13:24:04,030 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2022-02-15 13:24:04,030 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 31
[2022-02-15 13:24:04,030 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 13:24:04,317 INFO  L225             Difference]: With dead ends: 60298
[2022-02-15 13:24:04,317 INFO  L226             Difference]: Without dead ends: 59922
[2022-02-15 13:24:04,317 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 11 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90
[2022-02-15 13:24:04,317 INFO  L933         BasicCegarLoop]: 26 mSDtfsCounter, 60 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 13:24:04,317 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 169 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 13:24:04,389 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 59922 states.