/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.abstract-por-f0ea240 [2022-02-11 01:05:17,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-11 01:05:17,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-11 01:05:17,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-11 01:05:17,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-11 01:05:17,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-11 01:05:17,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-11 01:05:17,817 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-02-11 01:05:17,833 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-11 01:05:17,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-11 01:05:17,833 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-11 01:05:17,833 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-11 01:05:17,834 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-11 01:05:17,834 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-11 01:05:17,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-11 01:05:17,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-11 01:05:17,834 INFO L138 SettingsManager]: * Use SBE=true [2022-02-11 01:05:17,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-11 01:05:17,834 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-11 01:05:17,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-11 01:05:17,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-11 01:05:17,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-11 01:05:17,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-11 01:05:17,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-11 01:05:17,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-11 01:05:17,836 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-11 01:05:17,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-11 01:05:17,836 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-11 01:05:17,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-11 01:05:17,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-11 01:05:17,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-11 01:05:17,837 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-11 01:05:17,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-11 01:05:17,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 01:05:17,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-11 01:05:17,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-11 01:05:17,839 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-11 01:05:17,839 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-11 01:05:17,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-11 01:05:17,839 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-11 01:05:17,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-11 01:05:17,839 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-11 01:05:18,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-11 01:05:18,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-11 01:05:18,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-11 01:05:18,049 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-11 01:05:18,051 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-11 01:05:18,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl [2022-02-11 01:05:18,053 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl' [2022-02-11 01:05:18,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-11 01:05:18,076 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-11 01:05:18,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-11 01:05:18,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-11 01:05:18,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-11 01:05:18,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:05:18" (1/1) ... [2022-02-11 01:05:18,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:05:18" (1/1) ... [2022-02-11 01:05:18,097 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-11 01:05:18,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-11 01:05:18,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-11 01:05:18,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-11 01:05:18,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-11 01:05:18,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:05:18" (1/1) ... [2022-02-11 01:05:18,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:05:18" (1/1) ... [2022-02-11 01:05:18,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:05:18" (1/1) ... [2022-02-11 01:05:18,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:05:18" (1/1) ... [2022-02-11 01:05:18,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:05:18" (1/1) ... [2022-02-11 01:05:18,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:05:18" (1/1) ... [2022-02-11 01:05:18,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:05:18" (1/1) ... [2022-02-11 01:05:18,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-11 01:05:18,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-11 01:05:18,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-11 01:05:18,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-11 01:05:18,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:05:18" (1/1) ... [2022-02-11 01:05:18,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 01:05:18,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:18,173 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) [2022-02-11 01:05:18,176 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 [2022-02-11 01:05:18,228 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-11 01:05:18,228 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-11 01:05:18,228 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-11 01:05:18,228 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-11 01:05:18,228 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-11 01:05:18,228 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-11 01:05:18,228 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-11 01:05:18,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-11 01:05:18,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-11 01:05:18,229 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-11 01:05:18,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-11 01:05:18,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-11 01:05:18,230 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-11 01:05:18,268 INFO L234 CfgBuilder]: Building ICFG [2022-02-11 01:05:18,269 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-11 01:05:18,341 INFO L275 CfgBuilder]: Performing block encoding [2022-02-11 01:05:18,354 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-11 01:05:18,355 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-11 01:05:18,356 INFO L202 PluginConnector]: Adding new model three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:05:18 BoogieIcfgContainer [2022-02-11 01:05:18,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-11 01:05:18,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-11 01:05:18,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-11 01:05:18,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-11 01:05:18,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:05:18" (1/2) ... [2022-02-11 01:05:18,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55256c38 and model type three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 01:05:18, skipping insertion in model container [2022-02-11 01:05:18,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:05:18" (2/2) ... [2022-02-11 01:05:18,362 INFO L112 eAbstractionObserver]: Analyzing ICFG three-array-sum.wvr.bpl [2022-02-11 01:05:18,365 WARN L154 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-11 01:05:18,365 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-11 01:05:18,365 INFO L168 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-11 01:05:18,365 INFO L538 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-11 01:05:18,393 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-11 01:05:18,423 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-11 01:05:18,428 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-11 01:05:18,428 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-11 01:05:18,434 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 29 transitions, 82 flow [2022-02-11 01:05:18,484 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:18,486 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:18,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 01:05:18,493 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:18,494 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:18,494 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:18,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:18,498 INFO L85 PathProgramCache]: Analyzing trace with hash 510990075, now seen corresponding path program 1 times [2022-02-11 01:05:18,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:18,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603963027] [2022-02-11 01:05:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:18,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:18,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:18,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603963027] [2022-02-11 01:05:18,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603963027] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:05:18,746 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:05:18,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-11 01:05:18,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729680935] [2022-02-11 01:05:18,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:05:18,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 01:05:18,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:18,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 01:05:18,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 01:05:18,789 INFO L87 Difference]: Start difference. First operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:18,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:18,837 INFO L93 Difference]: Finished difference Result 257 states and 781 transitions. [2022-02-11 01:05:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 01:05:18,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 01:05:18,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:18,848 INFO L225 Difference]: With dead ends: 257 [2022-02-11 01:05:18,848 INFO L226 Difference]: Without dead ends: 230 [2022-02-11 01:05:18,872 INFO L933 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 [2022-02-11 01:05:18,875 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:18,876 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:05:18,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-11 01:05:18,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2022-02-11 01:05:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.0802139037433154) internal successors, (576), 187 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 576 transitions. [2022-02-11 01:05:18,945 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 576 transitions. Word has length 16 [2022-02-11 01:05:18,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:18,946 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 576 transitions. [2022-02-11 01:05:18,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:18,947 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 576 transitions. [2022-02-11 01:05:18,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 01:05:18,949 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:18,949 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:18,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-11 01:05:18,950 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:18,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:18,951 INFO L85 PathProgramCache]: Analyzing trace with hash 761707259, now seen corresponding path program 1 times [2022-02-11 01:05:18,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:18,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204241902] [2022-02-11 01:05:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:18,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:19,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:19,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204241902] [2022-02-11 01:05:19,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204241902] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:05:19,009 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:05:19,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 01:05:19,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356796189] [2022-02-11 01:05:19,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:05:19,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:05:19,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:19,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:05:19,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:05:19,012 INFO L87 Difference]: Start difference. First operand 188 states and 576 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:19,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:19,092 INFO L93 Difference]: Finished difference Result 355 states and 1087 transitions. [2022-02-11 01:05:19,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 01:05:19,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 01:05:19,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:19,100 INFO L225 Difference]: With dead ends: 355 [2022-02-11 01:05:19,100 INFO L226 Difference]: Without dead ends: 355 [2022-02-11 01:05:19,100 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:05:19,101 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:19,103 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:05:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-02-11 01:05:19,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 213. [2022-02-11 01:05:19,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 3.1792452830188678) internal successors, (674), 212 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 674 transitions. [2022-02-11 01:05:19,129 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 674 transitions. Word has length 18 [2022-02-11 01:05:19,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:19,129 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 674 transitions. [2022-02-11 01:05:19,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:19,130 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 674 transitions. [2022-02-11 01:05:19,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 01:05:19,131 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:19,131 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:19,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-11 01:05:19,132 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:19,133 INFO L85 PathProgramCache]: Analyzing trace with hash 988928639, now seen corresponding path program 2 times [2022-02-11 01:05:19,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:19,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264721125] [2022-02-11 01:05:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:19,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:19,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:19,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264721125] [2022-02-11 01:05:19,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264721125] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:05:19,182 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:05:19,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 01:05:19,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46581899] [2022-02-11 01:05:19,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:05:19,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 01:05:19,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:19,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 01:05:19,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:05:19,191 INFO L87 Difference]: Start difference. First operand 213 states and 674 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:19,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:19,267 INFO L93 Difference]: Finished difference Result 450 states and 1348 transitions. [2022-02-11 01:05:19,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 01:05:19,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 01:05:19,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:19,273 INFO L225 Difference]: With dead ends: 450 [2022-02-11 01:05:19,273 INFO L226 Difference]: Without dead ends: 450 [2022-02-11 01:05:19,274 INFO L933 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 [2022-02-11 01:05:19,282 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:19,283 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 47 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:05:19,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-02-11 01:05:19,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 235. [2022-02-11 01:05:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.1837606837606836) internal successors, (745), 234 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 745 transitions. [2022-02-11 01:05:19,308 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 745 transitions. Word has length 18 [2022-02-11 01:05:19,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:19,308 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 745 transitions. [2022-02-11 01:05:19,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:19,308 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 745 transitions. [2022-02-11 01:05:19,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 01:05:19,310 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:19,310 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:19,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-11 01:05:19,310 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:19,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:19,311 INFO L85 PathProgramCache]: Analyzing trace with hash 901635393, now seen corresponding path program 3 times [2022-02-11 01:05:19,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:19,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463305594] [2022-02-11 01:05:19,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:19,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:19,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:19,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463305594] [2022-02-11 01:05:19,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463305594] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:05:19,344 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:05:19,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 01:05:19,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983827784] [2022-02-11 01:05:19,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:05:19,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:05:19,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:19,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:05:19,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:05:19,345 INFO L87 Difference]: Start difference. First operand 235 states and 745 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:19,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:19,397 INFO L93 Difference]: Finished difference Result 349 states and 1037 transitions. [2022-02-11 01:05:19,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 01:05:19,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 01:05:19,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:19,400 INFO L225 Difference]: With dead ends: 349 [2022-02-11 01:05:19,400 INFO L226 Difference]: Without dead ends: 345 [2022-02-11 01:05:19,400 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:05:19,402 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 30 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 [2022-02-11 01:05:19,402 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 30 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:05:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-02-11 01:05:19,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 274. [2022-02-11 01:05:19,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.128205128205128) internal successors, (854), 273 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:19,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 854 transitions. [2022-02-11 01:05:19,420 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 854 transitions. Word has length 18 [2022-02-11 01:05:19,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:19,420 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 854 transitions. [2022-02-11 01:05:19,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:19,421 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 854 transitions. [2022-02-11 01:05:19,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 01:05:19,422 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:19,422 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:19,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-11 01:05:19,422 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:19,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:19,423 INFO L85 PathProgramCache]: Analyzing trace with hash 938496605, now seen corresponding path program 1 times [2022-02-11 01:05:19,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:19,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980387261] [2022-02-11 01:05:19,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:19,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:19,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:19,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980387261] [2022-02-11 01:05:19,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980387261] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:05:19,461 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:05:19,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 01:05:19,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670805277] [2022-02-11 01:05:19,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:05:19,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:05:19,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:19,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:05:19,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:05:19,462 INFO L87 Difference]: Start difference. First operand 274 states and 854 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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) [2022-02-11 01:05:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:19,515 INFO L93 Difference]: Finished difference Result 345 states and 1038 transitions. [2022-02-11 01:05:19,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 01:05:19,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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 [2022-02-11 01:05:19,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:19,517 INFO L225 Difference]: With dead ends: 345 [2022-02-11 01:05:19,517 INFO L226 Difference]: Without dead ends: 307 [2022-02-11 01:05:19,517 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:05:19,518 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:19,518 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 21 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:05:19,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-02-11 01:05:19,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 276. [2022-02-11 01:05:19,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.036363636363636) internal successors, (835), 275 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 835 transitions. [2022-02-11 01:05:19,526 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 835 transitions. Word has length 19 [2022-02-11 01:05:19,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:19,526 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 835 transitions. [2022-02-11 01:05:19,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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) [2022-02-11 01:05:19,526 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 835 transitions. [2022-02-11 01:05:19,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 01:05:19,527 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:19,527 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:19,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-11 01:05:19,528 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:19,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:19,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1599468323, now seen corresponding path program 2 times [2022-02-11 01:05:19,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:19,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702952446] [2022-02-11 01:05:19,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:19,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:19,551 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:19,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702952446] [2022-02-11 01:05:19,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702952446] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:05:19,552 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:05:19,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-11 01:05:19,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201333649] [2022-02-11 01:05:19,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:05:19,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 01:05:19,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:19,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 01:05:19,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 01:05:19,553 INFO L87 Difference]: Start difference. First operand 276 states and 835 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:19,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:19,570 INFO L93 Difference]: Finished difference Result 257 states and 747 transitions. [2022-02-11 01:05:19,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 01:05:19,570 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 [2022-02-11 01:05:19,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:19,571 INFO L225 Difference]: With dead ends: 257 [2022-02-11 01:05:19,571 INFO L226 Difference]: Without dead ends: 241 [2022-02-11 01:05:19,572 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 01:05:19,572 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:19,572 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 21 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:05:19,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-02-11 01:05:19,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 231. [2022-02-11 01:05:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 3.017391304347826) internal successors, (694), 230 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 694 transitions. [2022-02-11 01:05:19,578 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 694 transitions. Word has length 19 [2022-02-11 01:05:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:19,578 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 694 transitions. [2022-02-11 01:05:19,578 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) [2022-02-11 01:05:19,579 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 694 transitions. [2022-02-11 01:05:19,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 01:05:19,579 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:19,580 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:19,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-11 01:05:19,580 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:19,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:19,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1736700641, now seen corresponding path program 1 times [2022-02-11 01:05:19,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:19,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393428142] [2022-02-11 01:05:19,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:19,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:19,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:19,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393428142] [2022-02-11 01:05:19,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393428142] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:19,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124464989] [2022-02-11 01:05:19,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:19,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:19,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:19,615 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) [2022-02-11 01:05:19,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-11 01:05:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:19,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-11 01:05:19,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:19,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:19,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124464989] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:19,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:19,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-02-11 01:05:19,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47955525] [2022-02-11 01:05:19,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:19,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:05:19,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:19,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:05:19,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:05:19,819 INFO L87 Difference]: Start difference. First operand 231 states and 694 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) [2022-02-11 01:05:19,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:19,907 INFO L93 Difference]: Finished difference Result 295 states and 908 transitions. [2022-02-11 01:05:19,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 01:05:19,907 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 20 [2022-02-11 01:05:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:19,909 INFO L225 Difference]: With dead ends: 295 [2022-02-11 01:05:19,909 INFO L226 Difference]: Without dead ends: 295 [2022-02-11 01:05:19,909 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:05:19,910 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:19,910 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 31 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:05:19,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-02-11 01:05:19,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 203. [2022-02-11 01:05:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.0247524752475248) internal successors, (611), 202 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 611 transitions. [2022-02-11 01:05:19,915 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 611 transitions. Word has length 20 [2022-02-11 01:05:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:19,916 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 611 transitions. [2022-02-11 01:05:19,916 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) [2022-02-11 01:05:19,916 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 611 transitions. [2022-02-11 01:05:19,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 01:05:19,917 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:19,917 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:19,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-11 01:05:20,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:20,118 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash 345358593, now seen corresponding path program 1 times [2022-02-11 01:05:20,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:20,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915509683] [2022-02-11 01:05:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:20,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:20,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:20,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915509683] [2022-02-11 01:05:20,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915509683] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:20,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892936546] [2022-02-11 01:05:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:20,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:20,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:20,226 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) [2022-02-11 01:05:20,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-11 01:05:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:20,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-11 01:05:20,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:20,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:20,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892936546] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:20,416 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:20,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2022-02-11 01:05:20,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910735648] [2022-02-11 01:05:20,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:20,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 01:05:20,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:20,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 01:05:20,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:05:20,418 INFO L87 Difference]: Start difference. First operand 203 states and 611 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:20,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:20,503 INFO L93 Difference]: Finished difference Result 288 states and 873 transitions. [2022-02-11 01:05:20,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 01:05:20,507 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 01:05:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:20,509 INFO L225 Difference]: With dead ends: 288 [2022-02-11 01:05:20,509 INFO L226 Difference]: Without dead ends: 288 [2022-02-11 01:05:20,509 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:05:20,510 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:20,510 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 34 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:05:20,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-11 01:05:20,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 215. [2022-02-11 01:05:20,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2022-02-11 01:05:20,518 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 21 [2022-02-11 01:05:20,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:20,518 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2022-02-11 01:05:20,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:20,518 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2022-02-11 01:05:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 01:05:20,519 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:20,520 INFO L515 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] [2022-02-11 01:05:20,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:20,741 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,SelfDestructingSolverStorable7 [2022-02-11 01:05:20,742 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:20,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:20,742 INFO L85 PathProgramCache]: Analyzing trace with hash -41937549, now seen corresponding path program 1 times [2022-02-11 01:05:20,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:20,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818842359] [2022-02-11 01:05:20,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:20,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:20,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:20,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818842359] [2022-02-11 01:05:20,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818842359] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:20,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591578349] [2022-02-11 01:05:20,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:20,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:20,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:20,874 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) [2022-02-11 01:05:20,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-11 01:05:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:20,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 01:05:20,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:21,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-02-11 01:05:21,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:05:21,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 01:05:21,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:05:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:21,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:21,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-02-11 01:05:21,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:21,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:05:21,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2022-02-11 01:05:21,414 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:05:21,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2022-02-11 01:05:21,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-02-11 01:05:21,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-02-11 01:05:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:21,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591578349] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:21,499 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:21,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-02-11 01:05:21,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559788976] [2022-02-11 01:05:21,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:21,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 01:05:21,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:21,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 01:05:21,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:05:21,501 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:21,613 INFO L93 Difference]: Finished difference Result 476 states and 1460 transitions. [2022-02-11 01:05:21,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 01:05:21,613 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 01:05:21,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:21,616 INFO L225 Difference]: With dead ends: 476 [2022-02-11 01:05:21,616 INFO L226 Difference]: Without dead ends: 449 [2022-02-11 01:05:21,616 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:05:21,616 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:21,617 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 80 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:05:21,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-02-11 01:05:21,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 314. [2022-02-11 01:05:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.073482428115016) internal successors, (962), 313 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:21,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 962 transitions. [2022-02-11 01:05:21,626 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 962 transitions. Word has length 23 [2022-02-11 01:05:21,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:21,627 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 962 transitions. [2022-02-11 01:05:21,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:21,627 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 962 transitions. [2022-02-11 01:05:21,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 01:05:21,628 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:21,628 INFO L515 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] [2022-02-11 01:05:21,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:21,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:21,844 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:21,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:21,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1347256959, now seen corresponding path program 2 times [2022-02-11 01:05:21,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:21,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083814080] [2022-02-11 01:05:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:21,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:21,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:21,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083814080] [2022-02-11 01:05:21,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083814080] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:21,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678173976] [2022-02-11 01:05:21,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:05:21,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:21,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:21,968 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) [2022-02-11 01:05:21,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-11 01:05:21,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:05:21,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:21,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 01:05:21,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:22,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:05:22,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-11 01:05:22,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-11 01:05:22,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 01:05:22,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:22,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:22,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:05:22,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-02-11 01:05:22,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:05:22,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-02-11 01:05:22,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-02-11 01:05:22,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-11 01:05:22,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:05:22,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:22,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678173976] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:22,501 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:22,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-02-11 01:05:22,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157917204] [2022-02-11 01:05:22,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:22,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:05:22,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:22,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:05:22,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:05:22,502 INFO L87 Difference]: Start difference. First operand 314 states and 962 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) [2022-02-11 01:05:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:22,596 INFO L93 Difference]: Finished difference Result 517 states and 1600 transitions. [2022-02-11 01:05:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 01:05:22,596 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 23 [2022-02-11 01:05:22,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:22,599 INFO L225 Difference]: With dead ends: 517 [2022-02-11 01:05:22,599 INFO L226 Difference]: Without dead ends: 490 [2022-02-11 01:05:22,599 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:05:22,600 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:22,600 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 73 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:05:22,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-02-11 01:05:22,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 366. [2022-02-11 01:05:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:22,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2022-02-11 01:05:22,610 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2022-02-11 01:05:22,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:22,610 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2022-02-11 01:05:22,610 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) [2022-02-11 01:05:22,610 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2022-02-11 01:05:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 01:05:22,611 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:22,611 INFO L515 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] [2022-02-11 01:05:22,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-11 01:05:22,828 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 [2022-02-11 01:05:22,829 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:22,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:22,829 INFO L85 PathProgramCache]: Analyzing trace with hash 228461667, now seen corresponding path program 3 times [2022-02-11 01:05:22,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:22,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452132728] [2022-02-11 01:05:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:22,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:22,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:22,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452132728] [2022-02-11 01:05:22,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452132728] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:22,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294843930] [2022-02-11 01:05:22,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:05:22,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:22,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:22,918 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) [2022-02-11 01:05:22,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-11 01:05:22,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:05:22,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:22,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 01:05:22,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:23,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:05:23,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-11 01:05:23,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-11 01:05:23,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-11 01:05:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:23,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:23,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:05:23,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-02-11 01:05:23,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:05:23,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2022-02-11 01:05:23,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-02-11 01:05:23,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-11 01:05:23,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:05:23,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:23,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294843930] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:23,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:23,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-02-11 01:05:23,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191564194] [2022-02-11 01:05:23,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:23,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:05:23,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:23,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:05:23,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:05:23,411 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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) [2022-02-11 01:05:23,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:23,526 INFO L93 Difference]: Finished difference Result 572 states and 1775 transitions. [2022-02-11 01:05:23,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 01:05:23,526 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 23 [2022-02-11 01:05:23,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:23,529 INFO L225 Difference]: With dead ends: 572 [2022-02-11 01:05:23,529 INFO L226 Difference]: Without dead ends: 545 [2022-02-11 01:05:23,529 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:05:23,530 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:23,530 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 97 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:05:23,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-02-11 01:05:23,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 366. [2022-02-11 01:05:23,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2022-02-11 01:05:23,539 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2022-02-11 01:05:23,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:23,539 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2022-02-11 01:05:23,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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) [2022-02-11 01:05:23,539 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2022-02-11 01:05:23,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 01:05:23,540 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:23,540 INFO L515 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] [2022-02-11 01:05:23,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:23,757 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,SelfDestructingSolverStorable10 [2022-02-11 01:05:23,757 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:23,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:23,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1894937297, now seen corresponding path program 4 times [2022-02-11 01:05:23,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:23,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953906120] [2022-02-11 01:05:23,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:23,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:23,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:23,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953906120] [2022-02-11 01:05:23,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953906120] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:23,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632661321] [2022-02-11 01:05:23,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:05:23,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:23,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:23,832 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) [2022-02-11 01:05:23,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-11 01:05:23,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:05:23,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:23,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:05:23,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:23,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:23,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632661321] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:23,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:23,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-11 01:05:23,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61877957] [2022-02-11 01:05:23,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:23,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 01:05:23,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:23,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 01:05:23,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:05:23,944 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:24,047 INFO L93 Difference]: Finished difference Result 886 states and 2662 transitions. [2022-02-11 01:05:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 01:05:24,047 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-11 01:05:24,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:24,052 INFO L225 Difference]: With dead ends: 886 [2022-02-11 01:05:24,052 INFO L226 Difference]: Without dead ends: 886 [2022-02-11 01:05:24,052 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:05:24,053 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 93 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:24,053 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 117 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:05:24,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-02-11 01:05:24,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 517. [2022-02-11 01:05:24,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 3.203488372093023) internal successors, (1653), 516 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) [2022-02-11 01:05:24,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1653 transitions. [2022-02-11 01:05:24,072 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1653 transitions. Word has length 25 [2022-02-11 01:05:24,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:24,072 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1653 transitions. [2022-02-11 01:05:24,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:24,073 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1653 transitions. [2022-02-11 01:05:24,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 01:05:24,074 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:24,074 INFO L515 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] [2022-02-11 01:05:24,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:24,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:24,296 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:24,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:24,296 INFO L85 PathProgramCache]: Analyzing trace with hash -595223613, now seen corresponding path program 5 times [2022-02-11 01:05:24,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:24,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903915785] [2022-02-11 01:05:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:24,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:24,331 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:24,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903915785] [2022-02-11 01:05:24,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903915785] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:24,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081987228] [2022-02-11 01:05:24,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:05:24,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:24,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:24,345 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) [2022-02-11 01:05:24,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-11 01:05:24,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:05:24,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:24,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:05:24,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:24,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:24,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081987228] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:24,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:24,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-02-11 01:05:24,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2602001] [2022-02-11 01:05:24,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:24,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:05:24,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:24,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:05:24,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:05:24,458 INFO L87 Difference]: Start difference. First operand 517 states and 1653 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) 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) [2022-02-11 01:05:25,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:25,108 INFO L93 Difference]: Finished difference Result 1033 states and 3239 transitions. [2022-02-11 01:05:25,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 01:05:25,108 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) 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 25 [2022-02-11 01:05:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:25,113 INFO L225 Difference]: With dead ends: 1033 [2022-02-11 01:05:25,113 INFO L226 Difference]: Without dead ends: 1033 [2022-02-11 01:05:25,114 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=398, Invalid=1324, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 01:05:25,114 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 332 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:25,115 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 85 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:05:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-02-11 01:05:25,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 646. [2022-02-11 01:05:25,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 3.2496124031007754) internal successors, (2096), 645 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:25,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 2096 transitions. [2022-02-11 01:05:25,131 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 2096 transitions. Word has length 25 [2022-02-11 01:05:25,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:25,132 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 2096 transitions. [2022-02-11 01:05:25,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) 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) [2022-02-11 01:05:25,132 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 2096 transitions. [2022-02-11 01:05:25,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 01:05:25,133 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:25,133 INFO L515 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] [2022-02-11 01:05:25,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:25,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:25,347 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:25,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:25,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1959818837, now seen corresponding path program 6 times [2022-02-11 01:05:25,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:25,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483950303] [2022-02-11 01:05:25,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:25,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:25,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:25,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483950303] [2022-02-11 01:05:25,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483950303] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:25,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108487115] [2022-02-11 01:05:25,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:05:25,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:25,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:25,396 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) [2022-02-11 01:05:25,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-11 01:05:25,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:05:25,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:25,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:05:25,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:25,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:25,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108487115] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:25,528 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:25,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-02-11 01:05:25,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596703578] [2022-02-11 01:05:25,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:25,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:05:25,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:25,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:05:25,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:05:25,529 INFO L87 Difference]: Start difference. First operand 646 states and 2096 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) [2022-02-11 01:05:25,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:25,975 INFO L93 Difference]: Finished difference Result 2177 states and 6995 transitions. [2022-02-11 01:05:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 01:05:25,976 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 25 [2022-02-11 01:05:25,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:25,985 INFO L225 Difference]: With dead ends: 2177 [2022-02-11 01:05:25,985 INFO L226 Difference]: Without dead ends: 2151 [2022-02-11 01:05:25,986 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:05:25,986 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 240 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:25,987 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 73 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:05:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2022-02-11 01:05:26,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1034. [2022-02-11 01:05:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 3.478218780251694) internal successors, (3593), 1033 states have internal predecessors, (3593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3593 transitions. [2022-02-11 01:05:26,018 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3593 transitions. Word has length 25 [2022-02-11 01:05:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:26,018 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 3593 transitions. [2022-02-11 01:05:26,019 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) [2022-02-11 01:05:26,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3593 transitions. [2022-02-11 01:05:26,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 01:05:26,021 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:26,021 INFO L515 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] [2022-02-11 01:05:26,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:26,238 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,SelfDestructingSolverStorable13 [2022-02-11 01:05:26,239 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:26,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:26,239 INFO L85 PathProgramCache]: Analyzing trace with hash -131125633, now seen corresponding path program 7 times [2022-02-11 01:05:26,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:26,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021265150] [2022-02-11 01:05:26,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:26,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:26,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:26,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021265150] [2022-02-11 01:05:26,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021265150] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:26,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622712002] [2022-02-11 01:05:26,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:05:26,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:26,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:26,272 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) [2022-02-11 01:05:26,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-11 01:05:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:26,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:05:26,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:26,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:26,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622712002] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:26,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:26,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 01:05:26,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376063210] [2022-02-11 01:05:26,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:26,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:05:26,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:26,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:05:26,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:05:26,383 INFO L87 Difference]: Start difference. First operand 1034 states and 3593 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) [2022-02-11 01:05:26,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:26,467 INFO L93 Difference]: Finished difference Result 1476 states and 4927 transitions. [2022-02-11 01:05:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 01:05:26,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-11 01:05:26,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:26,473 INFO L225 Difference]: With dead ends: 1476 [2022-02-11 01:05:26,473 INFO L226 Difference]: Without dead ends: 1470 [2022-02-11 01:05:26,474 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-11 01:05:26,474 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 60 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:26,474 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 92 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:05:26,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-02-11 01:05:26,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1051. [2022-02-11 01:05:26,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 3.4647619047619047) internal successors, (3638), 1050 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 3638 transitions. [2022-02-11 01:05:26,498 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 3638 transitions. Word has length 25 [2022-02-11 01:05:26,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:26,498 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 3638 transitions. [2022-02-11 01:05:26,498 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) [2022-02-11 01:05:26,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 3638 transitions. [2022-02-11 01:05:26,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 01:05:26,500 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:26,500 INFO L515 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] [2022-02-11 01:05:26,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:26,716 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,SelfDestructingSolverStorable14 [2022-02-11 01:05:26,717 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:26,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:26,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1794697629, now seen corresponding path program 8 times [2022-02-11 01:05:26,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:26,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787189493] [2022-02-11 01:05:26,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:26,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:26,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:26,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787189493] [2022-02-11 01:05:26,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787189493] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:26,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276126155] [2022-02-11 01:05:26,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:05:26,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:26,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:26,764 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) [2022-02-11 01:05:26,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-11 01:05:26,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:05:26,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:26,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:05:26,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:26,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:26,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276126155] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:26,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:26,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-11 01:05:26,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989819358] [2022-02-11 01:05:26,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:26,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 01:05:26,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:26,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 01:05:26,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:05:26,883 INFO L87 Difference]: Start difference. First operand 1051 states and 3638 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:26,981 INFO L93 Difference]: Finished difference Result 1980 states and 6727 transitions. [2022-02-11 01:05:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 01:05:26,982 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2022-02-11 01:05:26,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:26,990 INFO L225 Difference]: With dead ends: 1980 [2022-02-11 01:05:26,990 INFO L226 Difference]: Without dead ends: 1968 [2022-02-11 01:05:26,990 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:05:26,990 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 95 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:26,991 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 84 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:05:26,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2022-02-11 01:05:27,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1297. [2022-02-11 01:05:27,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.580246913580247) internal successors, (4640), 1296 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:27,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4640 transitions. [2022-02-11 01:05:27,020 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4640 transitions. Word has length 25 [2022-02-11 01:05:27,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:27,021 INFO L470 AbstractCegarLoop]: Abstraction has 1297 states and 4640 transitions. [2022-02-11 01:05:27,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:27,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4640 transitions. [2022-02-11 01:05:27,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 01:05:27,037 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:27,037 INFO L515 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] [2022-02-11 01:05:27,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:27,251 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,SelfDestructingSolverStorable15 [2022-02-11 01:05:27,251 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:27,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:27,251 INFO L85 PathProgramCache]: Analyzing trace with hash -675454435, now seen corresponding path program 9 times [2022-02-11 01:05:27,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:27,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349006550] [2022-02-11 01:05:27,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:27,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:27,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:27,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349006550] [2022-02-11 01:05:27,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349006550] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:27,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405273320] [2022-02-11 01:05:27,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:05:27,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:27,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:27,291 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) [2022-02-11 01:05:27,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-11 01:05:27,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:05:27,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:27,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:05:27,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:27,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:27,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405273320] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:27,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:27,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-11 01:05:27,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026551138] [2022-02-11 01:05:27,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:27,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 01:05:27,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:27,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 01:05:27,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:05:27,462 INFO L87 Difference]: Start difference. First operand 1297 states and 4640 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:27,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:27,607 INFO L93 Difference]: Finished difference Result 2951 states and 10415 transitions. [2022-02-11 01:05:27,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 01:05:27,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-11 01:05:27,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:27,619 INFO L225 Difference]: With dead ends: 2951 [2022-02-11 01:05:27,619 INFO L226 Difference]: Without dead ends: 2945 [2022-02-11 01:05:27,619 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:05:27,619 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 159 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:27,620 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 41 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:05:27,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2022-02-11 01:05:27,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 2000. [2022-02-11 01:05:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1999 states have (on average 3.773886943471736) internal successors, (7544), 1999 states have internal predecessors, (7544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 7544 transitions. [2022-02-11 01:05:27,707 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 7544 transitions. Word has length 25 [2022-02-11 01:05:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:27,708 INFO L470 AbstractCegarLoop]: Abstraction has 2000 states and 7544 transitions. [2022-02-11 01:05:27,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:27,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 7544 transitions. [2022-02-11 01:05:27,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 01:05:27,712 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:27,712 INFO L515 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] [2022-02-11 01:05:27,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:27,929 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,SelfDestructingSolverStorable16 [2022-02-11 01:05:27,929 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:27,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:27,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1549423517, now seen corresponding path program 10 times [2022-02-11 01:05:27,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:27,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811298885] [2022-02-11 01:05:27,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:27,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:27,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:27,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811298885] [2022-02-11 01:05:27,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811298885] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:27,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434513687] [2022-02-11 01:05:27,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:05:27,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:27,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:27,955 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) [2022-02-11 01:05:27,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-11 01:05:28,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:05:28,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:28,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:05:28,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:28,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:28,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434513687] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:28,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:28,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 01:05:28,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946785922] [2022-02-11 01:05:28,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:28,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:05:28,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:28,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:05:28,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:05:28,101 INFO L87 Difference]: Start difference. First operand 2000 states and 7544 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:28,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:28,206 INFO L93 Difference]: Finished difference Result 2777 states and 9915 transitions. [2022-02-11 01:05:28,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 01:05:28,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2022-02-11 01:05:28,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:28,218 INFO L225 Difference]: With dead ends: 2777 [2022-02-11 01:05:28,218 INFO L226 Difference]: Without dead ends: 2759 [2022-02-11 01:05:28,218 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:05:28,219 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 92 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:28,219 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 67 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:05:28,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2022-02-11 01:05:28,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 1995. [2022-02-11 01:05:28,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 3.7703109327983952) internal successors, (7518), 1994 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 7518 transitions. [2022-02-11 01:05:28,269 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 7518 transitions. Word has length 25 [2022-02-11 01:05:28,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:28,269 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 7518 transitions. [2022-02-11 01:05:28,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:28,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 7518 transitions. [2022-02-11 01:05:28,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:05:28,274 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:28,274 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:28,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:28,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-11 01:05:28,490 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:28,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:28,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1017584555, now seen corresponding path program 11 times [2022-02-11 01:05:28,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:28,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347590607] [2022-02-11 01:05:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:28,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:28,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:28,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347590607] [2022-02-11 01:05:28,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347590607] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:28,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202889989] [2022-02-11 01:05:28,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:05:28,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:28,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:28,527 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) [2022-02-11 01:05:28,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-11 01:05:28,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:05:28,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:28,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:05:28,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:28,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:28,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202889989] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:28,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:28,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-11 01:05:28,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065034161] [2022-02-11 01:05:28,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:28,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 01:05:28,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:28,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 01:05:28,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:05:28,678 INFO L87 Difference]: Start difference. First operand 1995 states and 7518 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) [2022-02-11 01:05:29,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:29,061 INFO L93 Difference]: Finished difference Result 4088 states and 14079 transitions. [2022-02-11 01:05:29,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 01:05:29,061 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 26 [2022-02-11 01:05:29,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:29,082 INFO L225 Difference]: With dead ends: 4088 [2022-02-11 01:05:29,082 INFO L226 Difference]: Without dead ends: 3536 [2022-02-11 01:05:29,083 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:05:29,083 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 220 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:29,083 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 107 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:05:29,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2022-02-11 01:05:29,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2540. [2022-02-11 01:05:29,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 3.588814493895234) internal successors, (9112), 2539 states have internal predecessors, (9112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 9112 transitions. [2022-02-11 01:05:29,183 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 9112 transitions. Word has length 26 [2022-02-11 01:05:29,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:29,183 INFO L470 AbstractCegarLoop]: Abstraction has 2540 states and 9112 transitions. [2022-02-11 01:05:29,183 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) [2022-02-11 01:05:29,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 9112 transitions. [2022-02-11 01:05:29,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-11 01:05:29,189 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:29,189 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:29,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:29,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:29,407 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:29,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:29,407 INFO L85 PathProgramCache]: Analyzing trace with hash 226713273, now seen corresponding path program 12 times [2022-02-11 01:05:29,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:29,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969125786] [2022-02-11 01:05:29,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:29,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:29,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:29,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969125786] [2022-02-11 01:05:29,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969125786] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:29,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410495926] [2022-02-11 01:05:29,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:05:29,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:29,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:29,451 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) [2022-02-11 01:05:29,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-11 01:05:29,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:05:29,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:29,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:05:29,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:29,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:29,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410495926] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:29,562 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:29,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 01:05:29,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270227619] [2022-02-11 01:05:29,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:29,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:05:29,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:29,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:05:29,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:05:29,563 INFO L87 Difference]: Start difference. First operand 2540 states and 9112 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:29,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:29,654 INFO L93 Difference]: Finished difference Result 5012 states and 17668 transitions. [2022-02-11 01:05:29,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 01:05:29,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-11 01:05:29,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:29,677 INFO L225 Difference]: With dead ends: 5012 [2022-02-11 01:05:29,677 INFO L226 Difference]: Without dead ends: 4982 [2022-02-11 01:05:29,691 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-11 01:05:29,692 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:29,692 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 61 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:05:29,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2022-02-11 01:05:29,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 3891. [2022-02-11 01:05:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3891 states, 3890 states have (on average 3.6817480719794347) internal successors, (14322), 3890 states have internal predecessors, (14322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:29,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3891 states to 3891 states and 14322 transitions. [2022-02-11 01:05:29,882 INFO L78 Accepts]: Start accepts. Automaton has 3891 states and 14322 transitions. Word has length 28 [2022-02-11 01:05:29,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:29,882 INFO L470 AbstractCegarLoop]: Abstraction has 3891 states and 14322 transitions. [2022-02-11 01:05:29,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:29,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3891 states and 14322 transitions. [2022-02-11 01:05:29,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-11 01:05:29,892 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:29,892 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:29,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:30,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:30,108 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:30,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:30,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1762243953, now seen corresponding path program 13 times [2022-02-11 01:05:30,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:30,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075468483] [2022-02-11 01:05:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:30,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:30,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:30,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075468483] [2022-02-11 01:05:30,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075468483] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:30,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654284763] [2022-02-11 01:05:30,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:05:30,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:30,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:30,141 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) [2022-02-11 01:05:30,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-11 01:05:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:30,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:05:30,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:30,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:30,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654284763] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:30,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:30,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-02-11 01:05:30,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429145372] [2022-02-11 01:05:30,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:30,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-11 01:05:30,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:30,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-11 01:05:30,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-11 01:05:30,285 INFO L87 Difference]: Start difference. First operand 3891 states and 14322 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) [2022-02-11 01:05:30,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:30,612 INFO L93 Difference]: Finished difference Result 9890 states and 33297 transitions. [2022-02-11 01:05:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 01:05:30,612 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 28 [2022-02-11 01:05:30,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:30,644 INFO L225 Difference]: With dead ends: 9890 [2022-02-11 01:05:30,644 INFO L226 Difference]: Without dead ends: 9836 [2022-02-11 01:05:30,644 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-02-11 01:05:30,645 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 199 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:30,645 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 131 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:05:30,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2022-02-11 01:05:30,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 6083. [2022-02-11 01:05:30,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6083 states, 6082 states have (on average 3.672640578756988) internal successors, (22337), 6082 states have internal predecessors, (22337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:30,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6083 states to 6083 states and 22337 transitions. [2022-02-11 01:05:30,881 INFO L78 Accepts]: Start accepts. Automaton has 6083 states and 22337 transitions. Word has length 28 [2022-02-11 01:05:30,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:30,882 INFO L470 AbstractCegarLoop]: Abstraction has 6083 states and 22337 transitions. [2022-02-11 01:05:30,883 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) [2022-02-11 01:05:30,883 INFO L276 IsEmpty]: Start isEmpty. Operand 6083 states and 22337 transitions. [2022-02-11 01:05:30,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-11 01:05:30,894 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:30,894 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:30,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:31,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:31,111 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:31,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:31,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2006057489, now seen corresponding path program 14 times [2022-02-11 01:05:31,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:31,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200205710] [2022-02-11 01:05:31,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:31,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:31,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:31,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200205710] [2022-02-11 01:05:31,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200205710] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:31,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927027691] [2022-02-11 01:05:31,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:05:31,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:31,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:31,164 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) [2022-02-11 01:05:31,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-11 01:05:31,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:05:31,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:31,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:05:31,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:31,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:31,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927027691] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:31,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:31,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 01:05:31,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175538088] [2022-02-11 01:05:31,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:31,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:05:31,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:31,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:05:31,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:05:31,332 INFO L87 Difference]: Start difference. First operand 6083 states and 22337 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:31,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:31,466 INFO L93 Difference]: Finished difference Result 8194 states and 29343 transitions. [2022-02-11 01:05:31,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 01:05:31,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-11 01:05:31,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:31,492 INFO L225 Difference]: With dead ends: 8194 [2022-02-11 01:05:31,493 INFO L226 Difference]: Without dead ends: 8152 [2022-02-11 01:05:31,493 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-11 01:05:31,496 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:31,497 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 74 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:05:31,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8152 states. [2022-02-11 01:05:31,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8152 to 7162. [2022-02-11 01:05:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7162 states, 7161 states have (on average 3.697807568775311) internal successors, (26480), 7161 states have internal predecessors, (26480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:31,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7162 states to 7162 states and 26480 transitions. [2022-02-11 01:05:31,707 INFO L78 Accepts]: Start accepts. Automaton has 7162 states and 26480 transitions. Word has length 28 [2022-02-11 01:05:31,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:31,707 INFO L470 AbstractCegarLoop]: Abstraction has 7162 states and 26480 transitions. [2022-02-11 01:05:31,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 7162 states and 26480 transitions. [2022-02-11 01:05:31,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-11 01:05:31,737 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:31,737 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:31,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:31,937 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,SelfDestructingSolverStorable21 [2022-02-11 01:05:31,938 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:31,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:31,938 INFO L85 PathProgramCache]: Analyzing trace with hash -753379127, now seen corresponding path program 15 times [2022-02-11 01:05:31,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:31,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729091128] [2022-02-11 01:05:31,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:31,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:31,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:31,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729091128] [2022-02-11 01:05:31,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729091128] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:31,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394377855] [2022-02-11 01:05:31,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:05:31,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:31,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:31,992 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) [2022-02-11 01:05:32,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-11 01:05:32,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 01:05:32,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:32,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:05:32,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:32,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:32,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394377855] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:32,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:32,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-02-11 01:05:32,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509431714] [2022-02-11 01:05:32,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:32,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 01:05:32,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:32,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 01:05:32,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:05:32,159 INFO L87 Difference]: Start difference. First operand 7162 states and 26480 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:32,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:32,545 INFO L93 Difference]: Finished difference Result 11815 states and 40319 transitions. [2022-02-11 01:05:32,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 01:05:32,546 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-11 01:05:32,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:32,576 INFO L225 Difference]: With dead ends: 11815 [2022-02-11 01:05:32,577 INFO L226 Difference]: Without dead ends: 11657 [2022-02-11 01:05:32,577 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:05:32,577 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 208 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:32,577 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 171 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:05:32,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11657 states. [2022-02-11 01:05:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11657 to 9193. [2022-02-11 01:05:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9193 states, 9192 states have (on average 3.609769364664926) internal successors, (33181), 9192 states have internal predecessors, (33181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:32,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9193 states to 9193 states and 33181 transitions. [2022-02-11 01:05:32,881 INFO L78 Accepts]: Start accepts. Automaton has 9193 states and 33181 transitions. Word has length 28 [2022-02-11 01:05:32,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:32,881 INFO L470 AbstractCegarLoop]: Abstraction has 9193 states and 33181 transitions. [2022-02-11 01:05:32,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:32,881 INFO L276 IsEmpty]: Start isEmpty. Operand 9193 states and 33181 transitions. [2022-02-11 01:05:32,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:05:32,898 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:32,898 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:32,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-02-11 01:05:33,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:33,112 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:33,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:33,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1894836115, now seen corresponding path program 16 times [2022-02-11 01:05:33,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:33,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927881845] [2022-02-11 01:05:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:33,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:33,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:33,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927881845] [2022-02-11 01:05:33,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927881845] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:33,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583925317] [2022-02-11 01:05:33,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:05:33,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:33,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:33,431 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) [2022-02-11 01:05:33,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-11 01:05:33,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:05:33,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:33,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:05:33,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:33,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:05:33,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-02-11 01:05:33,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-02-11 01:05:33,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-02-11 01:05:33,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-02-11 01:05:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:33,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:34,089 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:05:34,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 518 treesize of output 486 [2022-02-11 01:05:34,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:34,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:34,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:34,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:34,298 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-11 01:05:34,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-02-11 01:05:34,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:34,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:34,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:05:34,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-02-11 01:05:34,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:34,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:34,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:34,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-02-11 01:05:34,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:34,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:34,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:34,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-02-11 01:05:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:34,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583925317] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:34,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:34,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-11 01:05:34,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105114137] [2022-02-11 01:05:34,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:34,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 01:05:34,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:34,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 01:05:34,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:05:34,504 INFO L87 Difference]: Start difference. First operand 9193 states and 33181 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:35,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:35,421 INFO L93 Difference]: Finished difference Result 12792 states and 45116 transitions. [2022-02-11 01:05:35,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 01:05:35,433 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:05:35,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:35,477 INFO L225 Difference]: With dead ends: 12792 [2022-02-11 01:05:35,477 INFO L226 Difference]: Without dead ends: 12771 [2022-02-11 01:05:35,478 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 01:05:35,481 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 224 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:35,484 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 200 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 01:05:35,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12771 states. [2022-02-11 01:05:35,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12771 to 9338. [2022-02-11 01:05:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9338 states, 9337 states have (on average 3.6080111384813107) internal successors, (33688), 9337 states have internal predecessors, (33688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9338 states to 9338 states and 33688 transitions. [2022-02-11 01:05:35,811 INFO L78 Accepts]: Start accepts. Automaton has 9338 states and 33688 transitions. Word has length 30 [2022-02-11 01:05:35,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:35,811 INFO L470 AbstractCegarLoop]: Abstraction has 9338 states and 33688 transitions. [2022-02-11 01:05:35,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:35,811 INFO L276 IsEmpty]: Start isEmpty. Operand 9338 states and 33688 transitions. [2022-02-11 01:05:35,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:05:35,845 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:35,845 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:35,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:36,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:36,074 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:36,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:36,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1216905027, now seen corresponding path program 17 times [2022-02-11 01:05:36,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:36,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131658485] [2022-02-11 01:05:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:36,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:36,480 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:36,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131658485] [2022-02-11 01:05:36,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131658485] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:36,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459498623] [2022-02-11 01:05:36,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:05:36,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:36,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:36,482 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) [2022-02-11 01:05:36,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-11 01:05:36,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:05:36,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:36,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:05:36,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:36,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:05:36,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:36,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:36,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:36,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-02-11 01:05:36,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:36,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:36,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:36,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-02-11 01:05:36,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:36,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2022-02-11 01:05:37,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-02-11 01:05:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:37,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:37,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:37,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:37,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 445 treesize of output 413 [2022-02-11 01:05:37,782 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:05:37,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 97 [2022-02-11 01:05:37,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:37,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:05:37,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 77 [2022-02-11 01:05:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:38,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459498623] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:38,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:38,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-11 01:05:38,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225423089] [2022-02-11 01:05:38,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:38,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 01:05:38,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:38,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 01:05:38,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:05:38,242 INFO L87 Difference]: Start difference. First operand 9338 states and 33688 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:39,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:39,578 INFO L93 Difference]: Finished difference Result 9951 states and 35487 transitions. [2022-02-11 01:05:39,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 01:05:39,579 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:05:39,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:39,604 INFO L225 Difference]: With dead ends: 9951 [2022-02-11 01:05:39,605 INFO L226 Difference]: Without dead ends: 9924 [2022-02-11 01:05:39,605 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 01:05:39,606 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 177 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 632 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:39,606 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 322 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1300 Invalid, 0 Unknown, 632 Unchecked, 0.7s Time] [2022-02-11 01:05:39,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9924 states. [2022-02-11 01:05:39,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9924 to 9370. [2022-02-11 01:05:39,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9370 states, 9369 states have (on average 3.604653644999466) internal successors, (33772), 9369 states have internal predecessors, (33772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:39,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9370 states to 9370 states and 33772 transitions. [2022-02-11 01:05:39,775 INFO L78 Accepts]: Start accepts. Automaton has 9370 states and 33772 transitions. Word has length 30 [2022-02-11 01:05:39,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:39,775 INFO L470 AbstractCegarLoop]: Abstraction has 9370 states and 33772 transitions. [2022-02-11 01:05:39,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:39,775 INFO L276 IsEmpty]: Start isEmpty. Operand 9370 states and 33772 transitions. [2022-02-11 01:05:39,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:05:39,792 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:39,792 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:39,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:40,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:40,020 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:40,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:40,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1367781517, now seen corresponding path program 18 times [2022-02-11 01:05:40,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:40,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378258812] [2022-02-11 01:05:40,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:40,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:40,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:40,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378258812] [2022-02-11 01:05:40,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378258812] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:40,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295879160] [2022-02-11 01:05:40,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:05:40,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:40,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:40,363 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) [2022-02-11 01:05:40,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-11 01:05:40,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:05:40,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:40,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:05:40,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:40,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:05:40,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-11 01:05:40,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-02-11 01:05:40,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:40,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-02-11 01:05:40,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-02-11 01:05:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:40,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:40,981 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:05:40,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 614 treesize of output 582 [2022-02-11 01:05:41,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:41,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:41,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,211 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-11 01:05:41,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-02-11 01:05:41,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:05:41,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-02-11 01:05:41,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:41,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-02-11 01:05:41,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:41,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-02-11 01:05:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:41,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295879160] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:41,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:41,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-11 01:05:41,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710746219] [2022-02-11 01:05:41,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:41,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 01:05:41,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:41,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 01:05:41,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:05:41,397 INFO L87 Difference]: Start difference. First operand 9370 states and 33772 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:42,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:42,428 INFO L93 Difference]: Finished difference Result 13421 states and 47075 transitions. [2022-02-11 01:05:42,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 01:05:42,429 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:05:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:42,464 INFO L225 Difference]: With dead ends: 13421 [2022-02-11 01:05:42,464 INFO L226 Difference]: Without dead ends: 13367 [2022-02-11 01:05:42,465 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:05:42,465 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 214 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:42,465 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 189 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 01:05:42,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13367 states. [2022-02-11 01:05:42,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13367 to 9537. [2022-02-11 01:05:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9537 states, 9536 states have (on average 3.606753355704698) internal successors, (34394), 9536 states have internal predecessors, (34394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:42,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9537 states to 9537 states and 34394 transitions. [2022-02-11 01:05:42,681 INFO L78 Accepts]: Start accepts. Automaton has 9537 states and 34394 transitions. Word has length 30 [2022-02-11 01:05:42,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:42,681 INFO L470 AbstractCegarLoop]: Abstraction has 9537 states and 34394 transitions. [2022-02-11 01:05:42,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:42,681 INFO L276 IsEmpty]: Start isEmpty. Operand 9537 states and 34394 transitions. [2022-02-11 01:05:42,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:05:42,699 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:42,699 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:42,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-02-11 01:05:42,914 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,SelfDestructingSolverStorable25 [2022-02-11 01:05:42,914 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:42,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:42,915 INFO L85 PathProgramCache]: Analyzing trace with hash 782322175, now seen corresponding path program 19 times [2022-02-11 01:05:42,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:42,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894631698] [2022-02-11 01:05:42,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:42,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:43,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:43,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894631698] [2022-02-11 01:05:43,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894631698] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:43,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010398258] [2022-02-11 01:05:43,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:05:43,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:43,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:43,304 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) [2022-02-11 01:05:43,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-11 01:05:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:43,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:05:43,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:43,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:05:43,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:43,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:43,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2022-02-11 01:05:43,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-11 01:05:43,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 01:05:43,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-02-11 01:05:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:43,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:43,934 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:05:43,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 614 treesize of output 582 [2022-02-11 01:05:44,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:44,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:44,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:44,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:44,103 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-11 01:05:44,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-02-11 01:05:44,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:44,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:44,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:05:44,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-02-11 01:05:44,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:44,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:44,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:44,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-02-11 01:05:44,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:44,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:44,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:44,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-02-11 01:05:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:44,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010398258] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:44,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:44,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-02-11 01:05:44,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185575690] [2022-02-11 01:05:44,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:44,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 01:05:44,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:44,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 01:05:44,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:05:44,305 INFO L87 Difference]: Start difference. First operand 9537 states and 34394 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:45,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:45,443 INFO L93 Difference]: Finished difference Result 13632 states and 47787 transitions. [2022-02-11 01:05:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 01:05:45,443 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:05:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:45,527 INFO L225 Difference]: With dead ends: 13632 [2022-02-11 01:05:45,527 INFO L226 Difference]: Without dead ends: 13611 [2022-02-11 01:05:45,528 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 01:05:45,528 INFO L934 BasicCegarLoop]: 43 mSDtfsCounter, 194 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:45,528 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 347 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1619 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:05:45,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13611 states. [2022-02-11 01:05:45,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13611 to 9566. [2022-02-11 01:05:45,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9566 states, 9565 states have (on average 3.6065865133298485) internal successors, (34497), 9565 states have internal predecessors, (34497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9566 states to 9566 states and 34497 transitions. [2022-02-11 01:05:45,755 INFO L78 Accepts]: Start accepts. Automaton has 9566 states and 34497 transitions. Word has length 30 [2022-02-11 01:05:45,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:45,756 INFO L470 AbstractCegarLoop]: Abstraction has 9566 states and 34497 transitions. [2022-02-11 01:05:45,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 9566 states and 34497 transitions. [2022-02-11 01:05:45,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:05:45,774 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:45,774 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:45,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:45,990 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,SelfDestructingSolverStorable26 [2022-02-11 01:05:45,991 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:45,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:45,992 INFO L85 PathProgramCache]: Analyzing trace with hash -336473117, now seen corresponding path program 20 times [2022-02-11 01:05:45,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:45,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570567393] [2022-02-11 01:05:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:45,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:46,319 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:46,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570567393] [2022-02-11 01:05:46,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570567393] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:46,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972090596] [2022-02-11 01:05:46,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:05:46,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:46,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:46,320 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) [2022-02-11 01:05:46,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-11 01:05:46,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:05:46,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:46,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:05:46,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:46,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:05:46,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:46,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:46,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2022-02-11 01:05:46,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-02-11 01:05:46,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-02-11 01:05:46,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 01:05:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:46,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:46,959 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:05:46,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 614 treesize of output 582 [2022-02-11 01:05:47,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:47,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:47,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:47,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:47,123 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-11 01:05:47,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-02-11 01:05:47,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:47,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:47,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:05:47,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-02-11 01:05:47,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:47,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:47,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:47,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-02-11 01:05:47,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:47,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:47,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:47,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-02-11 01:05:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:47,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972090596] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:47,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:47,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-02-11 01:05:47,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943735200] [2022-02-11 01:05:47,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:47,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 01:05:47,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:47,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 01:05:47,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:05:47,358 INFO L87 Difference]: Start difference. First operand 9566 states and 34497 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:48,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:48,936 INFO L93 Difference]: Finished difference Result 13438 states and 47172 transitions. [2022-02-11 01:05:48,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 01:05:48,936 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:05:48,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:49,011 INFO L225 Difference]: With dead ends: 13438 [2022-02-11 01:05:49,011 INFO L226 Difference]: Without dead ends: 13417 [2022-02-11 01:05:49,011 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=223, Invalid=1417, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 01:05:49,012 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 205 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:49,012 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 352 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1886 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 01:05:49,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13417 states. [2022-02-11 01:05:49,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13417 to 9556. [2022-02-11 01:05:49,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9556 states, 9555 states have (on average 3.6063840920983776) internal successors, (34459), 9555 states have internal predecessors, (34459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9556 states to 9556 states and 34459 transitions. [2022-02-11 01:05:49,218 INFO L78 Accepts]: Start accepts. Automaton has 9556 states and 34459 transitions. Word has length 30 [2022-02-11 01:05:49,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:49,218 INFO L470 AbstractCegarLoop]: Abstraction has 9556 states and 34459 transitions. [2022-02-11 01:05:49,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:49,218 INFO L276 IsEmpty]: Start isEmpty. Operand 9556 states and 34459 transitions. [2022-02-11 01:05:49,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:05:49,234 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:49,234 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:49,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:49,447 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,SelfDestructingSolverStorable27 [2022-02-11 01:05:49,447 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:49,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:49,448 INFO L85 PathProgramCache]: Analyzing trace with hash 418455901, now seen corresponding path program 21 times [2022-02-11 01:05:49,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:49,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719396812] [2022-02-11 01:05:49,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:49,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:49,635 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:49,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719396812] [2022-02-11 01:05:49,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719396812] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:49,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536513595] [2022-02-11 01:05:49,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:05:49,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:49,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:49,637 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) [2022-02-11 01:05:49,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-11 01:05:49,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:05:49,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:49,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 01:05:49,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:49,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:05:49,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:05:49,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2022-02-11 01:05:49,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:05:49,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 61 [2022-02-11 01:05:49,947 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-02-11 01:05:49,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 01:05:50,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:50,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:05:50,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-02-11 01:05:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:50,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:50,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:50,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 109 [2022-02-11 01:05:50,773 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:05:50,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 98 [2022-02-11 01:05:50,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:50,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:05:50,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 78 [2022-02-11 01:05:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:51,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536513595] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:51,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:51,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-02-11 01:05:51,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461203925] [2022-02-11 01:05:51,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:51,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:05:51,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:51,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:05:51,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:05:51,127 INFO L87 Difference]: Start difference. First operand 9556 states and 34459 transitions. Second operand has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:55,954 INFO L93 Difference]: Finished difference Result 20722 states and 72136 transitions. [2022-02-11 01:05:55,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-11 01:05:55,975 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:05:55,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:56,028 INFO L225 Difference]: With dead ends: 20722 [2022-02-11 01:05:56,028 INFO L226 Difference]: Without dead ends: 20668 [2022-02-11 01:05:56,032 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3576 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1107, Invalid=9813, Unknown=0, NotChecked=0, Total=10920 [2022-02-11 01:05:56,032 INFO L934 BasicCegarLoop]: 60 mSDtfsCounter, 590 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 2765 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 5299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2451 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:56,033 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 851 Invalid, 5299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2765 Invalid, 0 Unknown, 2451 Unchecked, 1.4s Time] [2022-02-11 01:05:56,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20668 states. [2022-02-11 01:05:56,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20668 to 9634. [2022-02-11 01:05:56,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9634 states, 9633 states have (on average 3.6039655351396243) internal successors, (34717), 9633 states have internal predecessors, (34717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:56,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9634 states to 9634 states and 34717 transitions. [2022-02-11 01:05:56,399 INFO L78 Accepts]: Start accepts. Automaton has 9634 states and 34717 transitions. Word has length 30 [2022-02-11 01:05:56,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:56,400 INFO L470 AbstractCegarLoop]: Abstraction has 9634 states and 34717 transitions. [2022-02-11 01:05:56,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:56,400 INFO L276 IsEmpty]: Start isEmpty. Operand 9634 states and 34717 transitions. [2022-02-11 01:05:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:05:56,415 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:56,415 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:56,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:56,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:56,631 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:56,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:56,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2138468893, now seen corresponding path program 22 times [2022-02-11 01:05:56,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:56,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286866138] [2022-02-11 01:05:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:56,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:56,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:56,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286866138] [2022-02-11 01:05:56,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286866138] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:56,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019843608] [2022-02-11 01:05:56,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:05:56,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:56,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:56,877 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) [2022-02-11 01:05:56,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-11 01:05:56,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:05:56,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:56,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:05:56,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:57,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:05:57,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-02-11 01:05:57,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-02-11 01:05:57,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2022-02-11 01:05:57,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-02-11 01:05:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:57,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:57,449 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:05:57,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2390 treesize of output 2294 [2022-02-11 01:05:58,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:58,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:58,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:58,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:58,158 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-11 01:05:58,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-02-11 01:05:58,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:58,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:58,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:05:58,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-02-11 01:05:58,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:58,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:58,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:58,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-02-11 01:05:58,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:58,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:58,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:58,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-02-11 01:05:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:58,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019843608] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:58,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:58,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-02-11 01:05:58,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867383896] [2022-02-11 01:05:58,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:58,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 01:05:58,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:58,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 01:05:58,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:05:58,349 INFO L87 Difference]: Start difference. First operand 9634 states and 34717 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:59,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:59,627 INFO L93 Difference]: Finished difference Result 13699 states and 47972 transitions. [2022-02-11 01:05:59,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 01:05:59,627 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:05:59,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:59,662 INFO L225 Difference]: With dead ends: 13699 [2022-02-11 01:05:59,662 INFO L226 Difference]: Without dead ends: 13656 [2022-02-11 01:05:59,662 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 01:05:59,663 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 209 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:59,663 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 287 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1364 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:05:59,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13656 states. [2022-02-11 01:05:59,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13656 to 9867. [2022-02-11 01:05:59,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9867 states, 9866 states have (on average 3.5997364686803164) internal successors, (35515), 9866 states have internal predecessors, (35515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9867 states to 9867 states and 35515 transitions. [2022-02-11 01:05:59,853 INFO L78 Accepts]: Start accepts. Automaton has 9867 states and 35515 transitions. Word has length 30 [2022-02-11 01:05:59,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:59,853 INFO L470 AbstractCegarLoop]: Abstraction has 9867 states and 35515 transitions. [2022-02-11 01:05:59,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:59,854 INFO L276 IsEmpty]: Start isEmpty. Operand 9867 states and 35515 transitions. [2022-02-11 01:05:59,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:05:59,869 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:59,869 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:59,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-11 01:06:00,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:06:00,084 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:06:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:06:00,084 INFO L85 PathProgramCache]: Analyzing trace with hash -586467713, now seen corresponding path program 23 times [2022-02-11 01:06:00,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:06:00,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275262008] [2022-02-11 01:06:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:06:00,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:06:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:06:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:00,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:06:00,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275262008] [2022-02-11 01:06:00,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275262008] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:06:00,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547956198] [2022-02-11 01:06:00,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:06:00,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:06:00,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:06:00,355 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) [2022-02-11 01:06:00,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-11 01:06:00,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-11 01:06:00,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:06:00,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 40 conjunts are in the unsatisfiable core [2022-02-11 01:06:00,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:06:00,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:06:00,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:00,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-02-11 01:06:00,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:00,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:00,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:00,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:06:00,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 63 [2022-02-11 01:06:01,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:01,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:01,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:01,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:01,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2022-02-11 01:06:01,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:01,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:01,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:01,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:01,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 01:06:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:01,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:06:01,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:01,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:01,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:01,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:01,571 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-11 01:06:01,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 90 [2022-02-11 01:06:01,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:01,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:01,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:06:01,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 70 [2022-02-11 01:06:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:01,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547956198] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:06:01,855 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:06:01,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-11 01:06:01,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826327344] [2022-02-11 01:06:01,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:06:01,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:06:01,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:06:01,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:06:01,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:06:01,856 INFO L87 Difference]: Start difference. First operand 9867 states and 35515 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:06:11,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:06:11,468 INFO L93 Difference]: Finished difference Result 21914 states and 76487 transitions. [2022-02-11 01:06:11,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-02-11 01:06:11,469 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:06:11,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:06:11,531 INFO L225 Difference]: With dead ends: 21914 [2022-02-11 01:06:11,532 INFO L226 Difference]: Without dead ends: 21875 [2022-02-11 01:06:11,537 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7848 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2494, Invalid=18676, Unknown=0, NotChecked=0, Total=21170 [2022-02-11 01:06:11,537 INFO L934 BasicCegarLoop]: 58 mSDtfsCounter, 487 mSDsluCounter, 1972 mSDsCounter, 0 mSdLazyCounter, 2846 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 6896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3947 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:06:11,537 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 876 Invalid, 6896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2846 Invalid, 0 Unknown, 3947 Unchecked, 1.6s Time] [2022-02-11 01:06:11,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21875 states. [2022-02-11 01:06:11,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21875 to 10145. [2022-02-11 01:06:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10145 states, 10144 states have (on average 3.597594637223975) internal successors, (36494), 10144 states have internal predecessors, (36494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:06:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10145 states to 10145 states and 36494 transitions. [2022-02-11 01:06:11,861 INFO L78 Accepts]: Start accepts. Automaton has 10145 states and 36494 transitions. Word has length 30 [2022-02-11 01:06:11,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:06:11,861 INFO L470 AbstractCegarLoop]: Abstraction has 10145 states and 36494 transitions. [2022-02-11 01:06:11,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:06:11,861 INFO L276 IsEmpty]: Start isEmpty. Operand 10145 states and 36494 transitions. [2022-02-11 01:06:11,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:06:11,877 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:06:11,877 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:06:11,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-11 01:06:12,093 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,SelfDestructingSolverStorable30 [2022-02-11 01:06:12,093 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:06:12,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:06:12,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1705263005, now seen corresponding path program 24 times [2022-02-11 01:06:12,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:06:12,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922679172] [2022-02-11 01:06:12,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:06:12,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:06:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:06:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:12,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:06:12,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922679172] [2022-02-11 01:06:12,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922679172] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:06:12,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762962094] [2022-02-11 01:06:12,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:06:12,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:06:12,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:06:12,424 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) [2022-02-11 01:06:12,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-11 01:06:12,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-11 01:06:12,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:06:12,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 01:06:12,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:06:12,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:06:12,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-02-11 01:06:12,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 01:06:12,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-02-11 01:06:12,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:06:12,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2022-02-11 01:06:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:13,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:06:13,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:13,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:06:13,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1149 treesize of output 1110 [2022-02-11 01:06:14,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:14,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:14,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:14,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:14,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-02-11 01:06:14,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:14,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:14,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:14,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:14,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-02-11 01:06:14,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:14,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:14,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:14,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:14,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 58 [2022-02-11 01:06:14,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:14,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:14,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:14,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:14,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 28 [2022-02-11 01:06:14,717 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-02-11 01:06:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:14,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762962094] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:06:14,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:06:14,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2022-02-11 01:06:14,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042538168] [2022-02-11 01:06:14,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:06:14,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:06:14,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:06:14,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:06:14,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:06:14,808 INFO L87 Difference]: Start difference. First operand 10145 states and 36494 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:06:48,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:06:48,199 INFO L93 Difference]: Finished difference Result 25914 states and 90193 transitions. [2022-02-11 01:06:48,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-02-11 01:06:48,200 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:06:48,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:06:48,326 INFO L225 Difference]: With dead ends: 25914 [2022-02-11 01:06:48,327 INFO L226 Difference]: Without dead ends: 25884 [2022-02-11 01:06:48,330 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13958 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=3729, Invalid=31801, Unknown=2, NotChecked=0, Total=35532 [2022-02-11 01:06:48,330 INFO L934 BasicCegarLoop]: 41 mSDtfsCounter, 573 mSDsluCounter, 2057 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 6627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4690 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:06:48,330 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 776 Invalid, 6627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1814 Invalid, 0 Unknown, 4690 Unchecked, 1.2s Time] [2022-02-11 01:06:48,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25884 states. [2022-02-11 01:06:48,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25884 to 10509. [2022-02-11 01:06:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10509 states, 10508 states have (on average 3.586410354015988) internal successors, (37686), 10508 states have internal predecessors, (37686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:06:48,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10509 states to 10509 states and 37686 transitions. [2022-02-11 01:06:48,614 INFO L78 Accepts]: Start accepts. Automaton has 10509 states and 37686 transitions. Word has length 30 [2022-02-11 01:06:48,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:06:48,614 INFO L470 AbstractCegarLoop]: Abstraction has 10509 states and 37686 transitions. [2022-02-11 01:06:48,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:06:48,615 INFO L276 IsEmpty]: Start isEmpty. Operand 10509 states and 37686 transitions. [2022-02-11 01:06:48,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:06:48,631 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:06:48,632 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:06:48,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-11 01:06:48,847 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,SelfDestructingSolverStorable31 [2022-02-11 01:06:48,847 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:06:48,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:06:48,848 INFO L85 PathProgramCache]: Analyzing trace with hash 66333555, now seen corresponding path program 25 times [2022-02-11 01:06:48,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:06:48,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453447665] [2022-02-11 01:06:48,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:06:48,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:06:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:06:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:49,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:06:49,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453447665] [2022-02-11 01:06:49,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453447665] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:06:49,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929160140] [2022-02-11 01:06:49,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:06:49,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:06:49,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:06:49,131 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) [2022-02-11 01:06:49,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-11 01:06:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:06:49,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:06:49,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:06:49,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:06:49,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:49,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-02-11 01:06:49,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-02-11 01:06:49,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-02-11 01:06:49,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-02-11 01:06:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:49,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:06:49,629 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:06:49,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2390 treesize of output 2294 [2022-02-11 01:06:50,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:50,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:50,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:50,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:50,361 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-11 01:06:50,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-02-11 01:06:50,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:50,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:50,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:06:50,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-02-11 01:06:50,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:50,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:50,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:50,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-02-11 01:06:50,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:50,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:50,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:50,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-02-11 01:06:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:50,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929160140] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:06:50,549 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:06:50,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-02-11 01:06:50,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380105392] [2022-02-11 01:06:50,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:06:50,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 01:06:50,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:06:50,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 01:06:50,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:06:50,550 INFO L87 Difference]: Start difference. First operand 10509 states and 37686 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:06:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:06:51,989 INFO L93 Difference]: Finished difference Result 14830 states and 51892 transitions. [2022-02-11 01:06:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 01:06:51,989 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:06:51,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:06:52,027 INFO L225 Difference]: With dead ends: 14830 [2022-02-11 01:06:52,028 INFO L226 Difference]: Without dead ends: 14791 [2022-02-11 01:06:52,028 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 01:06:52,028 INFO L934 BasicCegarLoop]: 43 mSDtfsCounter, 177 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:06:52,028 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 388 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1686 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 01:06:52,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14791 states. [2022-02-11 01:06:52,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14791 to 10482. [2022-02-11 01:06:52,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10482 states, 10481 states have (on average 3.5968896097700602) internal successors, (37699), 10481 states have internal predecessors, (37699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:06:52,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10482 states to 10482 states and 37699 transitions. [2022-02-11 01:06:52,248 INFO L78 Accepts]: Start accepts. Automaton has 10482 states and 37699 transitions. Word has length 30 [2022-02-11 01:06:52,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:06:52,248 INFO L470 AbstractCegarLoop]: Abstraction has 10482 states and 37699 transitions. [2022-02-11 01:06:52,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:06:52,248 INFO L276 IsEmpty]: Start isEmpty. Operand 10482 states and 37699 transitions. [2022-02-11 01:06:52,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:06:52,265 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:06:52,265 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:06:52,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-11 01:06:52,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:06:52,482 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:06:52,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:06:52,482 INFO L85 PathProgramCache]: Analyzing trace with hash 639992413, now seen corresponding path program 26 times [2022-02-11 01:06:52,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:06:52,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353345801] [2022-02-11 01:06:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:06:52,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:06:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:06:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:52,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:06:52,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353345801] [2022-02-11 01:06:52,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353345801] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:06:52,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609524561] [2022-02-11 01:06:52,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:06:52,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:06:52,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:06:52,803 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) [2022-02-11 01:06:52,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-11 01:06:52,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:06:52,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:06:52,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:06:52,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:06:53,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:06:53,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-02-11 01:06:53,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 01:06:53,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-02-11 01:06:53,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-02-11 01:06:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:53,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:06:53,407 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:06:53,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2390 treesize of output 2294 [2022-02-11 01:06:54,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:54,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:54,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:54,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:54,479 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-11 01:06:54,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-02-11 01:06:54,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:54,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:54,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:06:54,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-02-11 01:06:54,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:54,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:54,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:54,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-02-11 01:06:54,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:54,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:54,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:54,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-02-11 01:06:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:54,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609524561] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:06:54,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:06:54,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-02-11 01:06:54,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372770665] [2022-02-11 01:06:54,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:06:54,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 01:06:54,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:06:54,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 01:06:54,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:06:54,637 INFO L87 Difference]: Start difference. First operand 10482 states and 37699 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:06:55,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:06:55,898 INFO L93 Difference]: Finished difference Result 14320 states and 50335 transitions. [2022-02-11 01:06:55,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 01:06:55,899 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:06:55,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:06:55,937 INFO L225 Difference]: With dead ends: 14320 [2022-02-11 01:06:55,938 INFO L226 Difference]: Without dead ends: 14281 [2022-02-11 01:06:55,938 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:06:55,938 INFO L934 BasicCegarLoop]: 40 mSDtfsCounter, 171 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:06:55,938 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 395 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1764 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 01:06:55,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14281 states. [2022-02-11 01:06:56,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14281 to 10505. [2022-02-11 01:06:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10505 states, 10504 states have (on average 3.598153084539223) internal successors, (37795), 10504 states have internal predecessors, (37795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:06:56,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10505 states to 10505 states and 37795 transitions. [2022-02-11 01:06:56,152 INFO L78 Accepts]: Start accepts. Automaton has 10505 states and 37795 transitions. Word has length 30 [2022-02-11 01:06:56,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:06:56,152 INFO L470 AbstractCegarLoop]: Abstraction has 10505 states and 37795 transitions. [2022-02-11 01:06:56,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:06:56,152 INFO L276 IsEmpty]: Start isEmpty. Operand 10505 states and 37795 transitions. [2022-02-11 01:06:56,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:06:56,169 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:06:56,169 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:06:56,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-02-11 01:06:56,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:06:56,374 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:06:56,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:06:56,374 INFO L85 PathProgramCache]: Analyzing trace with hash -35543505, now seen corresponding path program 27 times [2022-02-11 01:06:56,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:06:56,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012127427] [2022-02-11 01:06:56,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:06:56,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:06:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:06:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:56,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:06:56,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012127427] [2022-02-11 01:06:56,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012127427] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:06:56,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605034829] [2022-02-11 01:06:56,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:06:56,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:06:56,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:06:56,554 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) [2022-02-11 01:06:56,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-11 01:06:56,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:06:56,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:06:56,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 01:06:56,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:06:56,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:06:56,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-02-11 01:06:56,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-02-11 01:06:56,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-02-11 01:06:57,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:06:57,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-02-11 01:06:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:57,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:06:57,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:57,774 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-11 01:06:57,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 124 treesize of output 133 [2022-02-11 01:06:57,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:57,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:57,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:06:57,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 96 treesize of output 109 [2022-02-11 01:06:57,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:57,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:57,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 77 [2022-02-11 01:06:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:58,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605034829] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:06:58,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:06:58,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-02-11 01:06:58,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941665850] [2022-02-11 01:06:58,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:06:58,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:06:58,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:06:58,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:06:58,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:06:58,110 INFO L87 Difference]: Start difference. First operand 10505 states and 37795 transitions. Second operand has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:01,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:01,214 INFO L93 Difference]: Finished difference Result 19262 states and 66696 transitions. [2022-02-11 01:07:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-11 01:07:01,214 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:07:01,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:01,260 INFO L225 Difference]: With dead ends: 19262 [2022-02-11 01:07:01,261 INFO L226 Difference]: Without dead ends: 19205 [2022-02-11 01:07:01,261 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=597, Invalid=5409, Unknown=0, NotChecked=0, Total=6006 [2022-02-11 01:07:01,261 INFO L934 BasicCegarLoop]: 42 mSDtfsCounter, 324 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 3154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1241 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:01,261 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 600 Invalid, 3154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1861 Invalid, 0 Unknown, 1241 Unchecked, 0.9s Time] [2022-02-11 01:07:01,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19205 states. [2022-02-11 01:07:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19205 to 10656. [2022-02-11 01:07:01,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10656 states, 10655 states have (on average 3.596433599249179) internal successors, (38320), 10655 states have internal predecessors, (38320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10656 states to 10656 states and 38320 transitions. [2022-02-11 01:07:01,497 INFO L78 Accepts]: Start accepts. Automaton has 10656 states and 38320 transitions. Word has length 30 [2022-02-11 01:07:01,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:01,497 INFO L470 AbstractCegarLoop]: Abstraction has 10656 states and 38320 transitions. [2022-02-11 01:07:01,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:01,498 INFO L276 IsEmpty]: Start isEmpty. Operand 10656 states and 38320 transitions. [2022-02-11 01:07:01,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:07:01,514 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:01,514 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:01,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-02-11 01:07:01,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:01,719 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:07:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:01,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2114560187, now seen corresponding path program 28 times [2022-02-11 01:07:01,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:01,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448056736] [2022-02-11 01:07:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:01,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:01,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:01,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448056736] [2022-02-11 01:07:01,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448056736] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:01,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667428512] [2022-02-11 01:07:01,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:07:01,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:01,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:01,970 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) [2022-02-11 01:07:01,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-11 01:07:02,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:07:02,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:02,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:07:02,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:02,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:07:02,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:02,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-02-11 01:07:02,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:02,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-02-11 01:07:02,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-02-11 01:07:02,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-11 01:07:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:02,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:02,667 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:07:02,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-02-11 01:07:02,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:02,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:02,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:02,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-02-11 01:07:02,695 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:07:02,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 198 [2022-02-11 01:07:02,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:02,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:02,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:02,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-11 01:07:02,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:02,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:02,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:02,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-02-11 01:07:02,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:02,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:02,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:02,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667428512] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:02,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:02,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-11 01:07:02,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463673885] [2022-02-11 01:07:02,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:02,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 01:07:02,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:02,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 01:07:02,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-02-11 01:07:02,945 INFO L87 Difference]: Start difference. First operand 10656 states and 38320 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:04,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:04,413 INFO L93 Difference]: Finished difference Result 16958 states and 60208 transitions. [2022-02-11 01:07:04,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 01:07:04,414 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:07:04,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:04,459 INFO L225 Difference]: With dead ends: 16958 [2022-02-11 01:07:04,460 INFO L226 Difference]: Without dead ends: 16880 [2022-02-11 01:07:04,460 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=409, Invalid=1571, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 01:07:04,460 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 322 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:04,460 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 189 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 01:07:04,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16880 states. [2022-02-11 01:07:04,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16880 to 10813. [2022-02-11 01:07:04,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10813 states, 10812 states have (on average 3.5926748057713653) internal successors, (38844), 10812 states have internal predecessors, (38844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10813 states to 10813 states and 38844 transitions. [2022-02-11 01:07:04,807 INFO L78 Accepts]: Start accepts. Automaton has 10813 states and 38844 transitions. Word has length 30 [2022-02-11 01:07:04,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:04,808 INFO L470 AbstractCegarLoop]: Abstraction has 10813 states and 38844 transitions. [2022-02-11 01:07:04,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:04,808 INFO L276 IsEmpty]: Start isEmpty. Operand 10813 states and 38844 transitions. [2022-02-11 01:07:04,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:07:04,824 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:04,824 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:04,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-11 01:07:05,040 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,SelfDestructingSolverStorable35 [2022-02-11 01:07:05,040 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:07:05,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:05,041 INFO L85 PathProgramCache]: Analyzing trace with hash 995764895, now seen corresponding path program 29 times [2022-02-11 01:07:05,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:05,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93798681] [2022-02-11 01:07:05,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:05,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:05,259 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:05,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93798681] [2022-02-11 01:07:05,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93798681] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:05,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830432479] [2022-02-11 01:07:05,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:07:05,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:05,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:05,260 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) [2022-02-11 01:07:05,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-11 01:07:05,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:07:05,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:05,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-11 01:07:05,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:05,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:07:05,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:05,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-02-11 01:07:05,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:05,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 49 [2022-02-11 01:07:05,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:05,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-02-11 01:07:05,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-02-11 01:07:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:05,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:06,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:06,189 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-11 01:07:06,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 86 [2022-02-11 01:07:06,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:06,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:06,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:06,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-02-11 01:07:06,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:06,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:06,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:06,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:06,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:06,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:06,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-11 01:07:06,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:06,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:06,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:06,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-02-11 01:07:06,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:06,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:06,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:06,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830432479] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:06,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:06,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-02-11 01:07:06,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713142372] [2022-02-11 01:07:06,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:06,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:07:06,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:06,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:07:06,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:07:06,456 INFO L87 Difference]: Start difference. First operand 10813 states and 38844 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:12,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:12,612 INFO L93 Difference]: Finished difference Result 20992 states and 73014 transitions. [2022-02-11 01:07:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-11 01:07:12,613 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:07:12,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:12,668 INFO L225 Difference]: With dead ends: 20992 [2022-02-11 01:07:12,669 INFO L226 Difference]: Without dead ends: 20938 [2022-02-11 01:07:12,669 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1917, Invalid=10293, Unknown=0, NotChecked=0, Total=12210 [2022-02-11 01:07:12,670 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 462 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 3055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:12,670 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 424 Invalid, 3055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2596 Invalid, 0 Unknown, 330 Unchecked, 1.5s Time] [2022-02-11 01:07:12,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20938 states. [2022-02-11 01:07:12,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20938 to 11234. [2022-02-11 01:07:12,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11234 states, 11233 states have (on average 3.589958158995816) internal successors, (40326), 11233 states have internal predecessors, (40326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:12,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11234 states to 11234 states and 40326 transitions. [2022-02-11 01:07:12,943 INFO L78 Accepts]: Start accepts. Automaton has 11234 states and 40326 transitions. Word has length 30 [2022-02-11 01:07:12,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:12,943 INFO L470 AbstractCegarLoop]: Abstraction has 11234 states and 40326 transitions. [2022-02-11 01:07:12,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:12,943 INFO L276 IsEmpty]: Start isEmpty. Operand 11234 states and 40326 transitions. [2022-02-11 01:07:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:07:13,011 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:13,011 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:13,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-11 01:07:13,218 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,SelfDestructingSolverStorable36 [2022-02-11 01:07:13,218 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:07:13,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:13,219 INFO L85 PathProgramCache]: Analyzing trace with hash -382774213, now seen corresponding path program 30 times [2022-02-11 01:07:13,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:13,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970823116] [2022-02-11 01:07:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:13,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:13,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:13,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970823116] [2022-02-11 01:07:13,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970823116] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:13,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913305604] [2022-02-11 01:07:13,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:07:13,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:13,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:13,495 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) [2022-02-11 01:07:13,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-11 01:07:13,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 01:07:13,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:13,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:07:13,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:13,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:07:13,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:13,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2022-02-11 01:07:13,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:13,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2022-02-11 01:07:13,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-11 01:07:13,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-11 01:07:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:13,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:14,176 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:07:14,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-02-11 01:07:14,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:14,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:14,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:14,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-02-11 01:07:14,206 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:07:14,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 478 treesize of output 446 [2022-02-11 01:07:14,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:14,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:14,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:14,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-11 01:07:14,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:14,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:14,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:14,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-02-11 01:07:14,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:14,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:14,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:14,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913305604] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:14,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:14,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-11 01:07:14,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101703355] [2022-02-11 01:07:14,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:14,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 01:07:14,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:14,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 01:07:14,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-02-11 01:07:14,444 INFO L87 Difference]: Start difference. First operand 11234 states and 40326 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:15,988 INFO L93 Difference]: Finished difference Result 18303 states and 64746 transitions. [2022-02-11 01:07:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 01:07:15,988 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:07:15,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:16,038 INFO L225 Difference]: With dead ends: 18303 [2022-02-11 01:07:16,038 INFO L226 Difference]: Without dead ends: 18282 [2022-02-11 01:07:16,039 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=296, Invalid=1866, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 01:07:16,039 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 254 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:16,039 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 256 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:07:16,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18282 states. [2022-02-11 01:07:16,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18282 to 11276. [2022-02-11 01:07:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11276 states, 11275 states have (on average 3.5881152993348113) internal successors, (40456), 11275 states have internal predecessors, (40456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:16,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11276 states to 11276 states and 40456 transitions. [2022-02-11 01:07:16,300 INFO L78 Accepts]: Start accepts. Automaton has 11276 states and 40456 transitions. Word has length 30 [2022-02-11 01:07:16,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:16,301 INFO L470 AbstractCegarLoop]: Abstraction has 11276 states and 40456 transitions. [2022-02-11 01:07:16,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:16,301 INFO L276 IsEmpty]: Start isEmpty. Operand 11276 states and 40456 transitions. [2022-02-11 01:07:16,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:07:16,318 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:16,319 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:16,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-11 01:07:16,531 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,SelfDestructingSolverStorable37 [2022-02-11 01:07:16,531 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:07:16,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:16,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1803225825, now seen corresponding path program 31 times [2022-02-11 01:07:16,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:16,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270910625] [2022-02-11 01:07:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:16,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:16,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:16,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270910625] [2022-02-11 01:07:16,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270910625] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:16,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945840678] [2022-02-11 01:07:16,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:07:16,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:16,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:16,773 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) [2022-02-11 01:07:16,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-11 01:07:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:16,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:07:16,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:16,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:07:17,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:17,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2022-02-11 01:07:17,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:17,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-02-11 01:07:17,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-11 01:07:17,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-02-11 01:07:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:17,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:17,382 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:07:17,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-02-11 01:07:17,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:17,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:17,402 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:17,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-02-11 01:07:17,410 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:07:17,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 478 treesize of output 446 [2022-02-11 01:07:17,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:17,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:17,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:17,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-11 01:07:17,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:17,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:17,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:17,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-02-11 01:07:17,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:17,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:17,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:17,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945840678] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:17,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:17,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-11 01:07:17,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954201327] [2022-02-11 01:07:17,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:17,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 01:07:17,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:17,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 01:07:17,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-11 01:07:17,759 INFO L87 Difference]: Start difference. First operand 11276 states and 40456 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:19,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:19,283 INFO L93 Difference]: Finished difference Result 17844 states and 63269 transitions. [2022-02-11 01:07:19,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 01:07:19,284 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:07:19,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:19,329 INFO L225 Difference]: With dead ends: 17844 [2022-02-11 01:07:19,329 INFO L226 Difference]: Without dead ends: 17793 [2022-02-11 01:07:19,330 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=318, Invalid=1662, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 01:07:19,330 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 266 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:19,330 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 221 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:07:19,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17793 states. [2022-02-11 01:07:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17793 to 11285. [2022-02-11 01:07:19,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11285 states, 11284 states have (on average 3.588709677419355) internal successors, (40495), 11284 states have internal predecessors, (40495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11285 states to 11285 states and 40495 transitions. [2022-02-11 01:07:19,623 INFO L78 Accepts]: Start accepts. Automaton has 11285 states and 40495 transitions. Word has length 30 [2022-02-11 01:07:19,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:19,623 INFO L470 AbstractCegarLoop]: Abstraction has 11285 states and 40495 transitions. [2022-02-11 01:07:19,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:19,623 INFO L276 IsEmpty]: Start isEmpty. Operand 11285 states and 40495 transitions. [2022-02-11 01:07:19,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:07:19,641 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:19,641 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:19,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-02-11 01:07:19,857 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,SelfDestructingSolverStorable38 [2022-02-11 01:07:19,857 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:07:19,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:19,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1471923427, now seen corresponding path program 32 times [2022-02-11 01:07:19,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:19,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538109182] [2022-02-11 01:07:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:19,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:20,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:20,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538109182] [2022-02-11 01:07:20,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538109182] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:20,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327022040] [2022-02-11 01:07:20,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:07:20,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:20,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:20,060 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) [2022-02-11 01:07:20,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-11 01:07:20,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:07:20,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:20,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:07:20,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:20,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:07:20,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:20,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2022-02-11 01:07:20,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:20,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 49 [2022-02-11 01:07:20,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:20,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-02-11 01:07:20,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:20,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 15 [2022-02-11 01:07:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:20,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:20,786 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:07:20,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-02-11 01:07:20,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:20,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:20,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:20,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-02-11 01:07:20,818 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:07:20,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 198 [2022-02-11 01:07:21,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:21,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:21,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:21,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 50 [2022-02-11 01:07:21,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:21,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:21,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:21,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2022-02-11 01:07:21,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:21,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:21,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:21,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327022040] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:21,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:21,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2022-02-11 01:07:21,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292362934] [2022-02-11 01:07:21,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:21,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 01:07:21,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:21,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 01:07:21,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:07:21,119 INFO L87 Difference]: Start difference. First operand 11285 states and 40495 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:22,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:22,886 INFO L93 Difference]: Finished difference Result 18171 states and 64224 transitions. [2022-02-11 01:07:22,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 01:07:22,886 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:07:22,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:22,934 INFO L225 Difference]: With dead ends: 18171 [2022-02-11 01:07:22,935 INFO L226 Difference]: Without dead ends: 18150 [2022-02-11 01:07:22,935 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 01:07:22,935 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 295 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:22,935 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 247 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 01:07:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18150 states. [2022-02-11 01:07:23,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18150 to 11289. [2022-02-11 01:07:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11289 states, 11288 states have (on average 3.5893869596031185) internal successors, (40517), 11288 states have internal predecessors, (40517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11289 states to 11289 states and 40517 transitions. [2022-02-11 01:07:23,182 INFO L78 Accepts]: Start accepts. Automaton has 11289 states and 40517 transitions. Word has length 30 [2022-02-11 01:07:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:23,182 INFO L470 AbstractCegarLoop]: Abstraction has 11289 states and 40517 transitions. [2022-02-11 01:07:23,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:23,183 INFO L276 IsEmpty]: Start isEmpty. Operand 11289 states and 40517 transitions. [2022-02-11 01:07:23,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:07:23,200 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:23,200 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:23,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-11 01:07:23,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-11 01:07:23,416 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:07:23,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1713539717, now seen corresponding path program 33 times [2022-02-11 01:07:23,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:23,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304323981] [2022-02-11 01:07:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:23,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:23,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:23,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304323981] [2022-02-11 01:07:23,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304323981] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:23,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099441280] [2022-02-11 01:07:23,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:07:23,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:23,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:23,585 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) [2022-02-11 01:07:23,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-11 01:07:23,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:07:23,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:23,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:07:23,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:23,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:07:23,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:23,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-02-11 01:07:23,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:23,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2022-02-11 01:07:23,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:23,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-02-11 01:07:23,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-02-11 01:07:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:23,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:24,093 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:07:24,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-02-11 01:07:24,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:24,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:24,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:24,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-02-11 01:07:24,115 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:07:24,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 478 treesize of output 446 [2022-02-11 01:07:24,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:24,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:24,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:24,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-11 01:07:24,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:24,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:24,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:24,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-02-11 01:07:24,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:24,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:24,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:24,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099441280] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:24,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:24,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-11 01:07:24,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933626878] [2022-02-11 01:07:24,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:24,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 01:07:24,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:24,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 01:07:24,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-02-11 01:07:24,296 INFO L87 Difference]: Start difference. First operand 11289 states and 40517 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:25,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:25,717 INFO L93 Difference]: Finished difference Result 15127 states and 51549 transitions. [2022-02-11 01:07:25,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 01:07:25,718 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:07:25,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:25,754 INFO L225 Difference]: With dead ends: 15127 [2022-02-11 01:07:25,754 INFO L226 Difference]: Without dead ends: 15091 [2022-02-11 01:07:25,755 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=348, Invalid=2102, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 01:07:25,755 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 395 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:25,756 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 264 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:07:25,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15091 states. [2022-02-11 01:07:25,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15091 to 11206. [2022-02-11 01:07:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11206 states, 11205 states have (on average 3.5927710843373495) internal successors, (40257), 11205 states have internal predecessors, (40257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:25,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11206 states to 11206 states and 40257 transitions. [2022-02-11 01:07:25,984 INFO L78 Accepts]: Start accepts. Automaton has 11206 states and 40257 transitions. Word has length 30 [2022-02-11 01:07:25,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:25,985 INFO L470 AbstractCegarLoop]: Abstraction has 11206 states and 40257 transitions. [2022-02-11 01:07:25,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:25,985 INFO L276 IsEmpty]: Start isEmpty. Operand 11206 states and 40257 transitions. [2022-02-11 01:07:26,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:07:26,004 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:26,004 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:26,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-11 01:07:26,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:26,220 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:07:26,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:26,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1448303207, now seen corresponding path program 34 times [2022-02-11 01:07:26,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:26,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632708592] [2022-02-11 01:07:26,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:26,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:26,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:26,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632708592] [2022-02-11 01:07:26,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632708592] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:26,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242670386] [2022-02-11 01:07:26,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:07:26,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:26,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:26,424 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) [2022-02-11 01:07:26,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-11 01:07:26,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:07:26,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:26,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:07:26,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:26,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:07:26,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-02-11 01:07:26,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-02-11 01:07:26,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-02-11 01:07:26,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-02-11 01:07:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:26,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:27,129 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:07:27,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-02-11 01:07:27,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:27,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:27,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:27,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-02-11 01:07:27,160 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:07:27,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 478 treesize of output 446 [2022-02-11 01:07:27,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:27,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:27,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:27,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-11 01:07:27,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:27,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:27,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:27,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-02-11 01:07:27,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:27,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:27,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:27,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242670386] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:27,479 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:27,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-11 01:07:27,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751875716] [2022-02-11 01:07:27,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:27,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 01:07:27,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:27,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 01:07:27,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-02-11 01:07:27,480 INFO L87 Difference]: Start difference. First operand 11206 states and 40257 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:29,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:29,257 INFO L93 Difference]: Finished difference Result 15682 states and 53273 transitions. [2022-02-11 01:07:29,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 01:07:29,257 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:07:29,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:29,295 INFO L225 Difference]: With dead ends: 15682 [2022-02-11 01:07:29,295 INFO L226 Difference]: Without dead ends: 15646 [2022-02-11 01:07:29,296 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=489, Invalid=2703, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 01:07:29,296 INFO L934 BasicCegarLoop]: 38 mSDtfsCounter, 418 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:29,296 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 289 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:07:29,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15646 states. [2022-02-11 01:07:29,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15646 to 11312. [2022-02-11 01:07:29,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11312 states, 11311 states have (on average 3.5949076120590577) internal successors, (40662), 11311 states have internal predecessors, (40662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11312 states to 11312 states and 40662 transitions. [2022-02-11 01:07:29,507 INFO L78 Accepts]: Start accepts. Automaton has 11312 states and 40662 transitions. Word has length 30 [2022-02-11 01:07:29,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:29,507 INFO L470 AbstractCegarLoop]: Abstraction has 11312 states and 40662 transitions. [2022-02-11 01:07:29,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 11312 states and 40662 transitions. [2022-02-11 01:07:29,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:07:29,524 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:29,524 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:29,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-11 01:07:29,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:29,739 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:07:29,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:29,740 INFO L85 PathProgramCache]: Analyzing trace with hash 701800485, now seen corresponding path program 35 times [2022-02-11 01:07:29,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:29,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019765209] [2022-02-11 01:07:29,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:29,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:29,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:29,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019765209] [2022-02-11 01:07:29,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019765209] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:29,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149293740] [2022-02-11 01:07:29,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:07:29,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:29,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:29,965 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) [2022-02-11 01:07:29,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-11 01:07:30,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:07:30,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:30,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-11 01:07:30,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:30,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:07:30,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:30,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-02-11 01:07:30,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:30,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-02-11 01:07:30,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-02-11 01:07:30,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-02-11 01:07:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:30,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:30,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:30,758 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-11 01:07:30,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 86 [2022-02-11 01:07:30,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:30,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:30,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:30,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-02-11 01:07:30,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:30,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:30,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:30,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:30,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:30,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:30,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-11 01:07:30,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:30,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:30,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:30,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-02-11 01:07:30,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:30,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:30,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:30,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149293740] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:30,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:30,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-02-11 01:07:31,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564098602] [2022-02-11 01:07:31,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:31,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:07:31,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:31,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:07:31,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:07:31,002 INFO L87 Difference]: Start difference. First operand 11312 states and 40662 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:37,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:37,280 INFO L93 Difference]: Finished difference Result 21377 states and 74506 transitions. [2022-02-11 01:07:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-11 01:07:37,280 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:07:37,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:37,329 INFO L225 Difference]: With dead ends: 21377 [2022-02-11 01:07:37,329 INFO L226 Difference]: Without dead ends: 21326 [2022-02-11 01:07:37,330 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3772 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1660, Invalid=8642, Unknown=0, NotChecked=0, Total=10302 [2022-02-11 01:07:37,330 INFO L934 BasicCegarLoop]: 41 mSDtfsCounter, 534 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 2905 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 3025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:37,331 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 460 Invalid, 3025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2905 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-11 01:07:37,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21326 states. [2022-02-11 01:07:37,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21326 to 11846. [2022-02-11 01:07:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11846 states, 11845 states have (on average 3.599409033347404) internal successors, (42635), 11845 states have internal predecessors, (42635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11846 states to 11846 states and 42635 transitions. [2022-02-11 01:07:37,619 INFO L78 Accepts]: Start accepts. Automaton has 11846 states and 42635 transitions. Word has length 30 [2022-02-11 01:07:37,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:37,619 INFO L470 AbstractCegarLoop]: Abstraction has 11846 states and 42635 transitions. [2022-02-11 01:07:37,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:37,620 INFO L276 IsEmpty]: Start isEmpty. Operand 11846 states and 42635 transitions. [2022-02-11 01:07:37,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:07:37,637 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:37,637 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:37,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-11 01:07:37,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:37,853 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:07:37,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:37,853 INFO L85 PathProgramCache]: Analyzing trace with hash -416994807, now seen corresponding path program 36 times [2022-02-11 01:07:37,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:37,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618448411] [2022-02-11 01:07:37,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:37,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:38,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:38,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618448411] [2022-02-11 01:07:38,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618448411] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:38,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722639561] [2022-02-11 01:07:38,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:07:38,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:38,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:38,097 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) [2022-02-11 01:07:38,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-11 01:07:38,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 01:07:38,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:38,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:07:38,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:38,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:07:38,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:38,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:38,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-02-11 01:07:38,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:38,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 65 [2022-02-11 01:07:38,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:38,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 52 [2022-02-11 01:07:38,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-11 01:07:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:38,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:38,795 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:07:38,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-02-11 01:07:38,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:38,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:38,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:38,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-02-11 01:07:38,826 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:07:38,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 198 [2022-02-11 01:07:39,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:39,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:39,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:39,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 50 [2022-02-11 01:07:39,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:39,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:39,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:39,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2022-02-11 01:07:39,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:39,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:39,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:39,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722639561] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:39,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:39,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2022-02-11 01:07:39,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740967129] [2022-02-11 01:07:39,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:39,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 01:07:39,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:39,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 01:07:39,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:07:39,088 INFO L87 Difference]: Start difference. First operand 11846 states and 42635 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:41,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:41,006 INFO L93 Difference]: Finished difference Result 18406 states and 65255 transitions. [2022-02-11 01:07:41,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 01:07:41,006 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:07:41,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:41,058 INFO L225 Difference]: With dead ends: 18406 [2022-02-11 01:07:41,058 INFO L226 Difference]: Without dead ends: 18352 [2022-02-11 01:07:41,058 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 01:07:41,059 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 359 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:41,059 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 208 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 01:07:41,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18352 states. [2022-02-11 01:07:41,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18352 to 11938. [2022-02-11 01:07:41,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11938 states, 11937 states have (on average 3.600150791656195) internal successors, (42975), 11937 states have internal predecessors, (42975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:41,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11938 states to 11938 states and 42975 transitions. [2022-02-11 01:07:41,309 INFO L78 Accepts]: Start accepts. Automaton has 11938 states and 42975 transitions. Word has length 30 [2022-02-11 01:07:41,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:41,309 INFO L470 AbstractCegarLoop]: Abstraction has 11938 states and 42975 transitions. [2022-02-11 01:07:41,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:41,310 INFO L276 IsEmpty]: Start isEmpty. Operand 11938 states and 42975 transitions. [2022-02-11 01:07:41,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:07:41,328 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:41,328 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:41,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-02-11 01:07:41,529 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,SelfDestructingSolverStorable43 [2022-02-11 01:07:41,529 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:07:41,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:41,530 INFO L85 PathProgramCache]: Analyzing trace with hash -22684839, now seen corresponding path program 37 times [2022-02-11 01:07:41,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:41,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600138914] [2022-02-11 01:07:41,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:41,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:41,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:41,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600138914] [2022-02-11 01:07:41,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600138914] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:41,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106242103] [2022-02-11 01:07:41,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:07:41,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:41,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:41,703 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) [2022-02-11 01:07:41,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-11 01:07:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:41,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:07:41,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:41,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:07:42,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-02-11 01:07:42,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-02-11 01:07:42,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:42,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-02-11 01:07:42,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-02-11 01:07:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:42,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:42,353 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:07:42,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-02-11 01:07:42,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:42,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:42,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:42,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-02-11 01:07:42,391 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:07:42,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 478 treesize of output 446 [2022-02-11 01:07:42,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:42,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:42,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:42,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-11 01:07:42,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:42,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:42,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:42,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-02-11 01:07:42,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:42,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:42,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:42,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106242103] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:42,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:42,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-11 01:07:42,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798750285] [2022-02-11 01:07:42,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:42,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 01:07:42,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:42,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 01:07:42,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-11 01:07:42,661 INFO L87 Difference]: Start difference. First operand 11938 states and 42975 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:46,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:46,061 INFO L93 Difference]: Finished difference Result 22417 states and 74446 transitions. [2022-02-11 01:07:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 01:07:46,062 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:07:46,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:46,118 INFO L225 Difference]: With dead ends: 22417 [2022-02-11 01:07:46,119 INFO L226 Difference]: Without dead ends: 22288 [2022-02-11 01:07:46,119 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1590 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=747, Invalid=4509, Unknown=0, NotChecked=0, Total=5256 [2022-02-11 01:07:46,120 INFO L934 BasicCegarLoop]: 67 mSDtfsCounter, 515 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 3065 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 3133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 3065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:46,120 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 682 Invalid, 3133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 3065 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-11 01:07:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22288 states. [2022-02-11 01:07:46,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22288 to 12527. [2022-02-11 01:07:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12527 states, 12526 states have (on average 3.6147213795305766) internal successors, (45278), 12526 states have internal predecessors, (45278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:46,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12527 states to 12527 states and 45278 transitions. [2022-02-11 01:07:46,491 INFO L78 Accepts]: Start accepts. Automaton has 12527 states and 45278 transitions. Word has length 30 [2022-02-11 01:07:46,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:46,491 INFO L470 AbstractCegarLoop]: Abstraction has 12527 states and 45278 transitions. [2022-02-11 01:07:46,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:46,491 INFO L276 IsEmpty]: Start isEmpty. Operand 12527 states and 45278 transitions. [2022-02-11 01:07:46,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:07:46,510 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:46,510 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:46,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-02-11 01:07:46,721 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,SelfDestructingSolverStorable44 [2022-02-11 01:07:46,721 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:07:46,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:46,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1697328153, now seen corresponding path program 38 times [2022-02-11 01:07:46,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:46,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379528329] [2022-02-11 01:07:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:46,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:46,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:46,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379528329] [2022-02-11 01:07:46,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379528329] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:46,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123043355] [2022-02-11 01:07:46,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:07:46,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:46,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:46,992 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) [2022-02-11 01:07:46,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-11 01:07:47,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:07:47,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:47,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 40 conjunts are in the unsatisfiable core [2022-02-11 01:07:47,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:47,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:07:47,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:47,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-02-11 01:07:47,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:47,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 28 [2022-02-11 01:07:47,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:47,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-02-11 01:07:47,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-02-11 01:07:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:47,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:47,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:47,849 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-11 01:07:47,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 98 [2022-02-11 01:07:47,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:47,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:47,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:47,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 84 [2022-02-11 01:07:47,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:47,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1014 treesize of output 966 [2022-02-11 01:07:48,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:48,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:48,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:48,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-02-11 01:07:48,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:48,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:48,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:48,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-02-11 01:07:48,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:48,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:48,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:48,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123043355] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:48,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:48,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-02-11 01:07:48,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606041665] [2022-02-11 01:07:48,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:48,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:07:48,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:48,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:07:48,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:07:48,170 INFO L87 Difference]: Start difference. First operand 12527 states and 45278 transitions. Second operand has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:56,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:56,440 INFO L93 Difference]: Finished difference Result 23372 states and 81645 transitions. [2022-02-11 01:07:56,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-11 01:07:56,440 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:07:56,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:56,496 INFO L225 Difference]: With dead ends: 23372 [2022-02-11 01:07:56,497 INFO L226 Difference]: Without dead ends: 23302 [2022-02-11 01:07:56,497 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3353 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1788, Invalid=8718, Unknown=0, NotChecked=0, Total=10506 [2022-02-11 01:07:56,498 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 670 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 3720 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 3856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 3720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:56,498 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 468 Invalid, 3856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 3720 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-11 01:07:56,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23302 states. [2022-02-11 01:07:56,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23302 to 13527. [2022-02-11 01:07:56,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13527 states, 13526 states have (on average 3.618142836019518) internal successors, (48939), 13526 states have internal predecessors, (48939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13527 states to 13527 states and 48939 transitions. [2022-02-11 01:07:56,798 INFO L78 Accepts]: Start accepts. Automaton has 13527 states and 48939 transitions. Word has length 30 [2022-02-11 01:07:56,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:56,798 INFO L470 AbstractCegarLoop]: Abstraction has 13527 states and 48939 transitions. [2022-02-11 01:07:56,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:56,798 INFO L276 IsEmpty]: Start isEmpty. Operand 13527 states and 48939 transitions. [2022-02-11 01:07:56,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:07:56,821 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:56,821 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:56,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-11 01:07:57,022 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,SelfDestructingSolverStorable45 [2022-02-11 01:07:57,023 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:07:57,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:57,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1027608453, now seen corresponding path program 39 times [2022-02-11 01:07:57,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:57,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307501417] [2022-02-11 01:07:57,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:57,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:57,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:57,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307501417] [2022-02-11 01:07:57,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307501417] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:57,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117217355] [2022-02-11 01:07:57,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:07:57,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:57,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:57,244 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) [2022-02-11 01:07:57,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-11 01:07:57,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 01:07:57,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:57,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 01:07:57,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:57,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:07:57,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:57,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-02-11 01:07:57,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:57,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:57,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-02-11 01:07:57,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-02-11 01:07:57,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 01:07:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:57,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:58,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:58,297 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-11 01:07:58,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 153 treesize of output 154 [2022-02-11 01:07:58,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:58,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:58,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:58,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 117 treesize of output 122 [2022-02-11 01:07:58,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:58,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:58,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 413 treesize of output 389 [2022-02-11 01:07:58,714 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:58,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117217355] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:58,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:58,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-11 01:07:58,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946007422] [2022-02-11 01:07:58,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:58,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:07:58,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:58,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:07:58,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:07:58,715 INFO L87 Difference]: Start difference. First operand 13527 states and 48939 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:59,509 INFO L93 Difference]: Finished difference Result 15110 states and 53669 transitions. [2022-02-11 01:07:59,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 01:07:59,509 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:07:59,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:59,559 INFO L225 Difference]: With dead ends: 15110 [2022-02-11 01:07:59,559 INFO L226 Difference]: Without dead ends: 15052 [2022-02-11 01:07:59,559 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:07:59,559 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 157 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 503 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:59,560 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 283 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1027 Invalid, 0 Unknown, 503 Unchecked, 0.5s Time] [2022-02-11 01:07:59,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15052 states. [2022-02-11 01:07:59,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15052 to 13566. [2022-02-11 01:07:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13566 states, 13565 states have (on average 3.6155547364541096) internal successors, (49045), 13565 states have internal predecessors, (49045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13566 states to 13566 states and 49045 transitions. [2022-02-11 01:07:59,806 INFO L78 Accepts]: Start accepts. Automaton has 13566 states and 49045 transitions. Word has length 30 [2022-02-11 01:07:59,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:59,807 INFO L470 AbstractCegarLoop]: Abstraction has 13566 states and 49045 transitions. [2022-02-11 01:07:59,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:59,807 INFO L276 IsEmpty]: Start isEmpty. Operand 13566 states and 49045 transitions. [2022-02-11 01:07:59,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:07:59,829 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:59,829 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:59,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:00,044 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,SelfDestructingSolverStorable46 [2022-02-11 01:08:00,045 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:00,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:00,045 INFO L85 PathProgramCache]: Analyzing trace with hash -2146403745, now seen corresponding path program 40 times [2022-02-11 01:08:00,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:00,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221938543] [2022-02-11 01:08:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:00,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:00,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:00,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221938543] [2022-02-11 01:08:00,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221938543] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:00,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702831780] [2022-02-11 01:08:00,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:08:00,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:00,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:00,226 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) [2022-02-11 01:08:00,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-11 01:08:00,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:08:00,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:00,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:08:00,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:00,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:08:00,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:00,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-02-11 01:08:00,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:00,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2022-02-11 01:08:00,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:00,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2022-02-11 01:08:00,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-11 01:08:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:00,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:00,892 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:08:00,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 97 [2022-02-11 01:08:00,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:00,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:00,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:00,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 83 [2022-02-11 01:08:00,925 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:08:00,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1962 treesize of output 1866 [2022-02-11 01:08:01,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:01,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:01,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:01,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-02-11 01:08:01,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:01,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:01,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:01,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-02-11 01:08:01,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:01,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:01,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:01,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702831780] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:01,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:01,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-11 01:08:01,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425029722] [2022-02-11 01:08:01,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:01,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 01:08:01,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:01,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 01:08:01,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:08:01,694 INFO L87 Difference]: Start difference. First operand 13566 states and 49045 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:02,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:02,228 INFO L93 Difference]: Finished difference Result 14686 states and 52491 transitions. [2022-02-11 01:08:02,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 01:08:02,228 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:08:02,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:02,263 INFO L225 Difference]: With dead ends: 14686 [2022-02-11 01:08:02,264 INFO L226 Difference]: Without dead ends: 14661 [2022-02-11 01:08:02,264 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:08:02,264 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 164 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:02,264 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 192 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:08:02,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14661 states. [2022-02-11 01:08:02,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14661 to 13684. [2022-02-11 01:08:02,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13684 states, 13683 states have (on average 3.6158737119052837) internal successors, (49476), 13683 states have internal predecessors, (49476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:02,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13684 states to 13684 states and 49476 transitions. [2022-02-11 01:08:02,499 INFO L78 Accepts]: Start accepts. Automaton has 13684 states and 49476 transitions. Word has length 30 [2022-02-11 01:08:02,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:02,499 INFO L470 AbstractCegarLoop]: Abstraction has 13684 states and 49476 transitions. [2022-02-11 01:08:02,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:02,499 INFO L276 IsEmpty]: Start isEmpty. Operand 13684 states and 49476 transitions. [2022-02-11 01:08:02,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:08:02,522 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:02,522 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:02,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:02,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:02,730 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:02,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:02,730 INFO L85 PathProgramCache]: Analyzing trace with hash 198851673, now seen corresponding path program 41 times [2022-02-11 01:08:02,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:02,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994091110] [2022-02-11 01:08:02,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:02,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:02,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:02,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994091110] [2022-02-11 01:08:02,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994091110] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:02,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409074424] [2022-02-11 01:08:02,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:08:02,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:02,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:02,946 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) [2022-02-11 01:08:02,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-11 01:08:02,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:08:02,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:02,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-11 01:08:02,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:03,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:08:03,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:03,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-02-11 01:08:03,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:03,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2022-02-11 01:08:03,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:03,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2022-02-11 01:08:03,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 01:08:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:03,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:03,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:03,841 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-11 01:08:03,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 98 [2022-02-11 01:08:03,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:03,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:03,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:03,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 84 [2022-02-11 01:08:03,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:03,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:03,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:03,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:03,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:03,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:03,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-02-11 01:08:03,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:03,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:03,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:03,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-02-11 01:08:03,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:03,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:04,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:04,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409074424] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:04,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:04,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2022-02-11 01:08:04,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859217777] [2022-02-11 01:08:04,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:04,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:08:04,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:04,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:08:04,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:08:04,116 INFO L87 Difference]: Start difference. First operand 13684 states and 49476 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:09,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:09,105 INFO L93 Difference]: Finished difference Result 24766 states and 86992 transitions. [2022-02-11 01:08:09,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-11 01:08:09,106 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:08:09,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:09,171 INFO L225 Difference]: With dead ends: 24766 [2022-02-11 01:08:09,171 INFO L226 Difference]: Without dead ends: 24705 [2022-02-11 01:08:09,172 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3121 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1200, Invalid=8306, Unknown=0, NotChecked=0, Total=9506 [2022-02-11 01:08:09,172 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 474 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 2899 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 3345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:09,173 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 411 Invalid, 3345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2899 Invalid, 0 Unknown, 377 Unchecked, 1.9s Time] [2022-02-11 01:08:09,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24705 states. [2022-02-11 01:08:09,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24705 to 13889. [2022-02-11 01:08:09,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13889 states, 13888 states have (on average 3.6162154377880182) internal successors, (50222), 13888 states have internal predecessors, (50222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:09,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13889 states to 13889 states and 50222 transitions. [2022-02-11 01:08:09,491 INFO L78 Accepts]: Start accepts. Automaton has 13889 states and 50222 transitions. Word has length 30 [2022-02-11 01:08:09,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:09,491 INFO L470 AbstractCegarLoop]: Abstraction has 13889 states and 50222 transitions. [2022-02-11 01:08:09,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:09,491 INFO L276 IsEmpty]: Start isEmpty. Operand 13889 states and 50222 transitions. [2022-02-11 01:08:09,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:08:09,514 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:09,514 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:09,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:09,730 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,SelfDestructingSolverStorable48 [2022-02-11 01:08:09,730 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:09,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2114563583, now seen corresponding path program 42 times [2022-02-11 01:08:09,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:09,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164684338] [2022-02-11 01:08:09,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:09,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:09,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:09,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164684338] [2022-02-11 01:08:09,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164684338] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:09,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609185987] [2022-02-11 01:08:09,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:08:09,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:09,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:09,988 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) [2022-02-11 01:08:09,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-11 01:08:10,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 01:08:10,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:10,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:08:10,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:10,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:08:10,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:10,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-02-11 01:08:10,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 01:08:10,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-02-11 01:08:10,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 01:08:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:10,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:10,461 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:08:10,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-02-11 01:08:10,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:10,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:10,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:10,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-02-11 01:08:10,483 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:08:10,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 234 treesize of output 218 [2022-02-11 01:08:10,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:10,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:10,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:10,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-11 01:08:10,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:10,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:10,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:10,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-02-11 01:08:10,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:10,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:10,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:10,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609185987] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:10,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:10,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-02-11 01:08:10,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540145451] [2022-02-11 01:08:10,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:10,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 01:08:10,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:10,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 01:08:10,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-02-11 01:08:10,685 INFO L87 Difference]: Start difference. First operand 13889 states and 50222 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:11,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:11,125 INFO L93 Difference]: Finished difference Result 15095 states and 53867 transitions. [2022-02-11 01:08:11,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 01:08:11,126 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:08:11,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:11,162 INFO L225 Difference]: With dead ends: 15095 [2022-02-11 01:08:11,162 INFO L226 Difference]: Without dead ends: 15056 [2022-02-11 01:08:11,162 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:08:11,163 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 143 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:11,163 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 186 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:08:11,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15056 states. [2022-02-11 01:08:11,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15056 to 13856. [2022-02-11 01:08:11,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13856 states, 13855 states have (on average 3.6176109707686757) internal successors, (50122), 13855 states have internal predecessors, (50122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:11,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13856 states to 13856 states and 50122 transitions. [2022-02-11 01:08:11,408 INFO L78 Accepts]: Start accepts. Automaton has 13856 states and 50122 transitions. Word has length 30 [2022-02-11 01:08:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:11,409 INFO L470 AbstractCegarLoop]: Abstraction has 13856 states and 50122 transitions. [2022-02-11 01:08:11,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:11,409 INFO L276 IsEmpty]: Start isEmpty. Operand 13856 states and 50122 transitions. [2022-02-11 01:08:11,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:08:11,433 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:11,433 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:11,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:11,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-11 01:08:11,641 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:11,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:11,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1529864005, now seen corresponding path program 43 times [2022-02-11 01:08:11,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:11,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926227948] [2022-02-11 01:08:11,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:11,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:11,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:11,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926227948] [2022-02-11 01:08:11,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926227948] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:11,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759920822] [2022-02-11 01:08:11,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:08:11,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:11,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:11,873 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) [2022-02-11 01:08:11,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-11 01:08:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:11,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:08:11,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:12,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:08:12,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:12,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-02-11 01:08:12,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:12,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2022-02-11 01:08:12,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-02-11 01:08:12,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-02-11 01:08:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:12,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:12,600 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:08:12,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 97 [2022-02-11 01:08:12,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:12,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:12,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:12,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 83 [2022-02-11 01:08:12,636 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:08:12,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 982 treesize of output 934 [2022-02-11 01:08:12,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:12,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:12,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:12,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-02-11 01:08:12,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:12,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:12,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:12,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-02-11 01:08:12,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:12,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:12,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:13,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759920822] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:13,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:13,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-11 01:08:13,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83674287] [2022-02-11 01:08:13,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:13,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 01:08:13,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:13,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 01:08:13,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:08:13,018 INFO L87 Difference]: Start difference. First operand 13856 states and 50122 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:13,530 INFO L93 Difference]: Finished difference Result 15000 states and 53772 transitions. [2022-02-11 01:08:13,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 01:08:13,531 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:08:13,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:13,569 INFO L225 Difference]: With dead ends: 15000 [2022-02-11 01:08:13,569 INFO L226 Difference]: Without dead ends: 14967 [2022-02-11 01:08:13,569 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-02-11 01:08:13,570 INFO L934 BasicCegarLoop]: 40 mSDtfsCounter, 100 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:13,570 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 302 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:08:13,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14967 states. [2022-02-11 01:08:13,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14967 to 13886. [2022-02-11 01:08:13,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13886 states, 13885 states have (on average 3.616996759092546) internal successors, (50222), 13885 states have internal predecessors, (50222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:13,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13886 states to 13886 states and 50222 transitions. [2022-02-11 01:08:13,816 INFO L78 Accepts]: Start accepts. Automaton has 13886 states and 50222 transitions. Word has length 30 [2022-02-11 01:08:13,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:13,816 INFO L470 AbstractCegarLoop]: Abstraction has 13886 states and 50222 transitions. [2022-02-11 01:08:13,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand 13886 states and 50222 transitions. [2022-02-11 01:08:13,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:08:13,841 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:13,841 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:13,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:14,056 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,SelfDestructingSolverStorable50 [2022-02-11 01:08:14,056 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:14,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:14,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1344651679, now seen corresponding path program 44 times [2022-02-11 01:08:14,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:14,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903401380] [2022-02-11 01:08:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:14,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:14,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:14,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903401380] [2022-02-11 01:08:14,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903401380] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:14,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053672300] [2022-02-11 01:08:14,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:08:14,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:14,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:14,253 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) [2022-02-11 01:08:14,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-11 01:08:14,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:08:14,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:14,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:08:14,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:14,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:08:14,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:14,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-02-11 01:08:14,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-02-11 01:08:14,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 01:08:14,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-11 01:08:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:14,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:14,901 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:08:14,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 97 [2022-02-11 01:08:14,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:14,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:14,923 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:14,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 83 [2022-02-11 01:08:14,931 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:08:14,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 452 treesize of output 428 [2022-02-11 01:08:15,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:15,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:15,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:15,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-02-11 01:08:15,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:15,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:15,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:15,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-02-11 01:08:15,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:15,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:15,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:15,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053672300] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:15,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:15,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-11 01:08:15,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926330472] [2022-02-11 01:08:15,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:15,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 01:08:15,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:15,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 01:08:15,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:08:15,192 INFO L87 Difference]: Start difference. First operand 13886 states and 50222 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:15,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:15,534 INFO L93 Difference]: Finished difference Result 14845 states and 53246 transitions. [2022-02-11 01:08:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 01:08:15,534 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:08:15,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:15,568 INFO L225 Difference]: With dead ends: 14845 [2022-02-11 01:08:15,569 INFO L226 Difference]: Without dead ends: 14782 [2022-02-11 01:08:15,569 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:08:15,569 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 104 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:15,569 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 225 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:08:15,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14782 states. [2022-02-11 01:08:15,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14782 to 13895. [2022-02-11 01:08:15,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13895 states, 13894 states have (on average 3.617244853893767) internal successors, (50258), 13894 states have internal predecessors, (50258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:15,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13895 states to 13895 states and 50258 transitions. [2022-02-11 01:08:15,804 INFO L78 Accepts]: Start accepts. Automaton has 13895 states and 50258 transitions. Word has length 30 [2022-02-11 01:08:15,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:15,804 INFO L470 AbstractCegarLoop]: Abstraction has 13895 states and 50258 transitions. [2022-02-11 01:08:15,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:15,804 INFO L276 IsEmpty]: Start isEmpty. Operand 13895 states and 50258 transitions. [2022-02-11 01:08:15,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:08:15,828 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:15,828 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:15,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:16,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:16,042 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:16,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:16,043 INFO L85 PathProgramCache]: Analyzing trace with hash 324833635, now seen corresponding path program 45 times [2022-02-11 01:08:16,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:16,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290613143] [2022-02-11 01:08:16,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:16,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:16,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:16,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290613143] [2022-02-11 01:08:16,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290613143] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:16,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425189306] [2022-02-11 01:08:16,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:08:16,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:16,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:16,233 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) [2022-02-11 01:08:16,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-11 01:08:16,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 01:08:16,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:16,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 01:08:16,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:16,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:08:16,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:16,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-02-11 01:08:16,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 01:08:16,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 01:08:16,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:16,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:16,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-11 01:08:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:16,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:17,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:17,170 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-11 01:08:17,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 153 treesize of output 154 [2022-02-11 01:08:17,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:17,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:17,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:17,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 117 treesize of output 122 [2022-02-11 01:08:17,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:17,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:17,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 805 treesize of output 757 [2022-02-11 01:08:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:17,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425189306] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:17,928 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:17,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-11 01:08:17,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420806072] [2022-02-11 01:08:17,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:17,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 01:08:17,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:17,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 01:08:17,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-11 01:08:17,929 INFO L87 Difference]: Start difference. First operand 13895 states and 50258 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:18,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:18,802 INFO L93 Difference]: Finished difference Result 16534 states and 58806 transitions. [2022-02-11 01:08:18,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 01:08:18,802 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:08:18,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:18,843 INFO L225 Difference]: With dead ends: 16534 [2022-02-11 01:08:18,843 INFO L226 Difference]: Without dead ends: 16501 [2022-02-11 01:08:18,843 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 01:08:18,843 INFO L934 BasicCegarLoop]: 38 mSDtfsCounter, 154 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:18,844 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 327 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 874 Invalid, 0 Unknown, 264 Unchecked, 0.5s Time] [2022-02-11 01:08:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16501 states. [2022-02-11 01:08:19,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16501 to 14057. [2022-02-11 01:08:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14057 states, 14056 states have (on average 3.6129055207740466) internal successors, (50783), 14056 states have internal predecessors, (50783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:19,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14057 states to 14057 states and 50783 transitions. [2022-02-11 01:08:19,092 INFO L78 Accepts]: Start accepts. Automaton has 14057 states and 50783 transitions. Word has length 30 [2022-02-11 01:08:19,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:19,092 INFO L470 AbstractCegarLoop]: Abstraction has 14057 states and 50783 transitions. [2022-02-11 01:08:19,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:19,092 INFO L276 IsEmpty]: Start isEmpty. Operand 14057 states and 50783 transitions. [2022-02-11 01:08:19,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:08:19,115 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:19,115 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:19,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-02-11 01:08:19,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:19,331 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:19,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:19,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1748496823, now seen corresponding path program 46 times [2022-02-11 01:08:19,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:19,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115738718] [2022-02-11 01:08:19,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:19,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:19,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:19,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115738718] [2022-02-11 01:08:19,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115738718] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:19,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769589401] [2022-02-11 01:08:19,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:08:19,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:19,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:19,519 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) [2022-02-11 01:08:19,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-11 01:08:19,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:08:19,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:19,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:08:19,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:19,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:08:19,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:19,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-02-11 01:08:19,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 01:08:19,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-02-11 01:08:20,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-02-11 01:08:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:20,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:20,243 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:08:20,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 97 [2022-02-11 01:08:20,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:20,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:20,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:20,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 83 [2022-02-11 01:08:20,275 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:08:20,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 978 treesize of output 930 [2022-02-11 01:08:20,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:20,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:20,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:20,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-02-11 01:08:20,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:20,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:20,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:20,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-02-11 01:08:20,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:20,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:20,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:20,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769589401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:20,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:20,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-11 01:08:20,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453283452] [2022-02-11 01:08:20,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:20,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 01:08:20,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:20,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 01:08:20,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:08:20,721 INFO L87 Difference]: Start difference. First operand 14057 states and 50783 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:21,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:21,297 INFO L93 Difference]: Finished difference Result 14932 states and 53497 transitions. [2022-02-11 01:08:21,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 01:08:21,297 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:08:21,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:21,331 INFO L225 Difference]: With dead ends: 14932 [2022-02-11 01:08:21,331 INFO L226 Difference]: Without dead ends: 14907 [2022-02-11 01:08:21,332 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:08:21,332 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 71 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:21,332 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 284 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:08:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14907 states. [2022-02-11 01:08:21,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14907 to 13958. [2022-02-11 01:08:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13958 states, 13957 states have (on average 3.6155334240882713) internal successors, (50462), 13957 states have internal predecessors, (50462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:21,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13958 states to 13958 states and 50462 transitions. [2022-02-11 01:08:21,571 INFO L78 Accepts]: Start accepts. Automaton has 13958 states and 50462 transitions. Word has length 30 [2022-02-11 01:08:21,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:21,571 INFO L470 AbstractCegarLoop]: Abstraction has 13958 states and 50462 transitions. [2022-02-11 01:08:21,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 13958 states and 50462 transitions. [2022-02-11 01:08:21,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:08:21,595 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:21,595 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:21,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-02-11 01:08:21,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:21,810 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:21,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:21,811 INFO L85 PathProgramCache]: Analyzing trace with hash 277277977, now seen corresponding path program 47 times [2022-02-11 01:08:21,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:21,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716789734] [2022-02-11 01:08:21,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:21,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:21,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:21,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716789734] [2022-02-11 01:08:21,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716789734] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:21,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507290683] [2022-02-11 01:08:21,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:08:21,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:21,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:21,982 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) [2022-02-11 01:08:21,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-11 01:08:22,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:08:22,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:22,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 01:08:22,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:22,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:08:22,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:22,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-02-11 01:08:22,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:22,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:22,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:22,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 69 [2022-02-11 01:08:22,985 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-02-11 01:08:22,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 249 treesize of output 203 [2022-02-11 01:08:22,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:22,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:22,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:22,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:22,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-02-11 01:08:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:23,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:23,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:23,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:23,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:23,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:23,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 148 [2022-02-11 01:08:23,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:23,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:23,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:23,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:23,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 112 [2022-02-11 01:08:23,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:23,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:23,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:23,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:23,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507290683] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:23,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:23,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 30 [2022-02-11 01:08:23,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496132578] [2022-02-11 01:08:23,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:23,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:08:23,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:23,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:08:23,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:08:23,736 INFO L87 Difference]: Start difference. First operand 13958 states and 50462 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:30,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:30,417 INFO L93 Difference]: Finished difference Result 17619 states and 62768 transitions. [2022-02-11 01:08:30,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 01:08:30,418 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:08:30,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:30,459 INFO L225 Difference]: With dead ends: 17619 [2022-02-11 01:08:30,460 INFO L226 Difference]: Without dead ends: 17590 [2022-02-11 01:08:30,460 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 53 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1079, Invalid=5400, Unknown=1, NotChecked=0, Total=6480 [2022-02-11 01:08:30,461 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 259 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1051 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:30,462 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 469 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 474 Invalid, 0 Unknown, 1051 Unchecked, 0.2s Time] [2022-02-11 01:08:30,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17590 states. [2022-02-11 01:08:30,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17590 to 14619. [2022-02-11 01:08:30,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14619 states, 14618 states have (on average 3.619715419346012) internal successors, (52913), 14618 states have internal predecessors, (52913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:30,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14619 states to 14619 states and 52913 transitions. [2022-02-11 01:08:30,744 INFO L78 Accepts]: Start accepts. Automaton has 14619 states and 52913 transitions. Word has length 30 [2022-02-11 01:08:30,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:30,744 INFO L470 AbstractCegarLoop]: Abstraction has 14619 states and 52913 transitions. [2022-02-11 01:08:30,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:30,744 INFO L276 IsEmpty]: Start isEmpty. Operand 14619 states and 52913 transitions. [2022-02-11 01:08:30,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:08:30,768 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:30,769 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:30,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:30,979 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,SelfDestructingSolverStorable54 [2022-02-11 01:08:30,980 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:30,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:30,980 INFO L85 PathProgramCache]: Analyzing trace with hash -742540067, now seen corresponding path program 48 times [2022-02-11 01:08:30,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:30,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214793701] [2022-02-11 01:08:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:30,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:31,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:31,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214793701] [2022-02-11 01:08:31,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214793701] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:31,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313898301] [2022-02-11 01:08:31,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:08:31,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:31,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:31,150 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) [2022-02-11 01:08:31,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-11 01:08:31,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 01:08:31,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:31,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:08:31,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:31,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:08:31,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:31,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-02-11 01:08:31,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 01:08:31,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-02-11 01:08:31,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-11 01:08:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:31,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:31,818 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:08:31,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 97 [2022-02-11 01:08:31,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:31,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:31,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:31,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 83 [2022-02-11 01:08:31,847 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:08:31,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 978 treesize of output 930 [2022-02-11 01:08:32,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:32,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:32,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:32,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-02-11 01:08:32,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:32,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:32,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:32,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-02-11 01:08:32,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:32,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:32,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:32,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313898301] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:32,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:32,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-11 01:08:32,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682651853] [2022-02-11 01:08:32,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:32,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 01:08:32,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:32,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 01:08:32,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:08:32,317 INFO L87 Difference]: Start difference. First operand 14619 states and 52913 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:32,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:32,660 INFO L93 Difference]: Finished difference Result 15793 states and 56665 transitions. [2022-02-11 01:08:32,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 01:08:32,660 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:08:32,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:32,697 INFO L225 Difference]: With dead ends: 15793 [2022-02-11 01:08:32,697 INFO L226 Difference]: Without dead ends: 15760 [2022-02-11 01:08:32,697 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:08:32,698 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 133 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:32,698 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 189 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 492 Invalid, 0 Unknown, 121 Unchecked, 0.2s Time] [2022-02-11 01:08:32,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15760 states. [2022-02-11 01:08:32,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15760 to 14779. [2022-02-11 01:08:32,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14779 states, 14778 states have (on average 3.6170659087833266) internal successors, (53453), 14778 states have internal predecessors, (53453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:32,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14779 states to 14779 states and 53453 transitions. [2022-02-11 01:08:32,958 INFO L78 Accepts]: Start accepts. Automaton has 14779 states and 53453 transitions. Word has length 30 [2022-02-11 01:08:32,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:32,958 INFO L470 AbstractCegarLoop]: Abstraction has 14779 states and 53453 transitions. [2022-02-11 01:08:32,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:32,958 INFO L276 IsEmpty]: Start isEmpty. Operand 14779 states and 53453 transitions. [2022-02-11 01:08:32,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:08:32,983 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:32,983 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:32,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:33,198 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,SelfDestructingSolverStorable55 [2022-02-11 01:08:33,198 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:33,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:33,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1479096771, now seen corresponding path program 49 times [2022-02-11 01:08:33,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:33,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72797822] [2022-02-11 01:08:33,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:33,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:33,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:33,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72797822] [2022-02-11 01:08:33,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72797822] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:33,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663405939] [2022-02-11 01:08:33,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:08:33,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:33,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:33,398 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) [2022-02-11 01:08:33,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-11 01:08:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:33,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:08:33,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:33,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:08:33,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:33,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-02-11 01:08:33,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:33,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 66 [2022-02-11 01:08:33,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:33,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 52 [2022-02-11 01:08:33,904 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-02-11 01:08:33,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 67 [2022-02-11 01:08:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:33,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:34,118 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:08:34,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 97 [2022-02-11 01:08:34,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:34,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:34,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:34,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 83 [2022-02-11 01:08:34,149 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:08:34,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1766 treesize of output 1670 [2022-02-11 01:08:35,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:35,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:35,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:35,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-02-11 01:08:35,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:35,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:35,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:35,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-02-11 01:08:35,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:35,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:35,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:35,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:35,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663405939] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:35,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:35,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-11 01:08:35,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858015441] [2022-02-11 01:08:35,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:35,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 01:08:35,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:35,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 01:08:35,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:08:35,200 INFO L87 Difference]: Start difference. First operand 14779 states and 53453 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:35,681 INFO L93 Difference]: Finished difference Result 15575 states and 55865 transitions. [2022-02-11 01:08:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 01:08:35,681 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:08:35,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:35,717 INFO L225 Difference]: With dead ends: 15575 [2022-02-11 01:08:35,717 INFO L226 Difference]: Without dead ends: 15542 [2022-02-11 01:08:35,718 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:08:35,718 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 104 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:35,718 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 195 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:08:35,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15542 states. [2022-02-11 01:08:35,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15542 to 14580. [2022-02-11 01:08:35,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14580 states, 14579 states have (on average 3.619795596405789) internal successors, (52773), 14579 states have internal predecessors, (52773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14580 states to 14580 states and 52773 transitions. [2022-02-11 01:08:35,986 INFO L78 Accepts]: Start accepts. Automaton has 14580 states and 52773 transitions. Word has length 30 [2022-02-11 01:08:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:35,986 INFO L470 AbstractCegarLoop]: Abstraction has 14580 states and 52773 transitions. [2022-02-11 01:08:35,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 14580 states and 52773 transitions. [2022-02-11 01:08:36,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:08:36,012 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:36,012 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:36,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:36,226 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,SelfDestructingSolverStorable56 [2022-02-11 01:08:36,227 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:36,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:36,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1602758267, now seen corresponding path program 50 times [2022-02-11 01:08:36,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:36,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360659788] [2022-02-11 01:08:36,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:36,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:36,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:36,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360659788] [2022-02-11 01:08:36,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360659788] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:36,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145350672] [2022-02-11 01:08:36,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:08:36,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:36,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:36,429 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) [2022-02-11 01:08:36,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-11 01:08:36,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:08:36,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:36,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:08:36,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:36,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:08:36,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:36,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-02-11 01:08:36,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-02-11 01:08:36,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 01:08:36,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 01:08:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:36,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:37,110 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:08:37,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 97 [2022-02-11 01:08:37,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:37,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:37,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:37,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 83 [2022-02-11 01:08:37,139 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:08:37,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 488 treesize of output 464 [2022-02-11 01:08:37,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:37,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:37,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:37,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-02-11 01:08:37,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:37,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:37,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:37,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-02-11 01:08:37,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:37,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:37,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:37,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145350672] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:37,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:37,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-11 01:08:37,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792789204] [2022-02-11 01:08:37,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:37,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 01:08:37,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:37,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 01:08:37,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:08:37,399 INFO L87 Difference]: Start difference. First operand 14580 states and 52773 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:37,926 INFO L93 Difference]: Finished difference Result 15487 states and 55627 transitions. [2022-02-11 01:08:37,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 01:08:37,926 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:08:37,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:37,966 INFO L225 Difference]: With dead ends: 15487 [2022-02-11 01:08:37,966 INFO L226 Difference]: Without dead ends: 15454 [2022-02-11 01:08:37,967 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:08:37,967 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 88 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:37,967 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 274 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:08:37,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15454 states. [2022-02-11 01:08:38,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15454 to 14400. [2022-02-11 01:08:38,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14400 states, 14399 states have (on average 3.621154246822696) internal successors, (52141), 14399 states have internal predecessors, (52141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:38,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14400 states to 14400 states and 52141 transitions. [2022-02-11 01:08:38,219 INFO L78 Accepts]: Start accepts. Automaton has 14400 states and 52141 transitions. Word has length 30 [2022-02-11 01:08:38,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:38,219 INFO L470 AbstractCegarLoop]: Abstraction has 14400 states and 52141 transitions. [2022-02-11 01:08:38,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:38,219 INFO L276 IsEmpty]: Start isEmpty. Operand 14400 states and 52141 transitions. [2022-02-11 01:08:38,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:08:38,242 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:38,242 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:38,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:38,457 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,SelfDestructingSolverStorable57 [2022-02-11 01:08:38,458 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:38,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:38,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1465748903, now seen corresponding path program 51 times [2022-02-11 01:08:38,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:38,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75312186] [2022-02-11 01:08:38,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:38,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:38,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:38,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75312186] [2022-02-11 01:08:38,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75312186] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:38,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326398247] [2022-02-11 01:08:38,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:08:38,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:38,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:38,661 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) [2022-02-11 01:08:38,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-11 01:08:38,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 01:08:38,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:38,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 40 conjunts are in the unsatisfiable core [2022-02-11 01:08:38,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:38,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:08:38,872 INFO L353 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2022-02-11 01:08:38,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-11 01:08:39,089 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-11 01:08:39,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 41 [2022-02-11 01:08:39,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:39,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 83 [2022-02-11 01:08:39,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:39,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:39,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 51 [2022-02-11 01:08:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:39,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:40,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:40,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 151 [2022-02-11 01:08:40,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:40,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 127 [2022-02-11 01:08:40,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:40,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:40,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 925 treesize of output 861 [2022-02-11 01:08:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:45,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326398247] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:45,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:45,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2022-02-11 01:08:45,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757321739] [2022-02-11 01:08:45,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:45,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:08:45,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:45,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:08:45,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:08:45,365 INFO L87 Difference]: Start difference. First operand 14400 states and 52141 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:48,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:48,861 INFO L93 Difference]: Finished difference Result 25864 states and 90108 transitions. [2022-02-11 01:08:48,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-11 01:08:48,862 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:08:48,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:48,923 INFO L225 Difference]: With dead ends: 25864 [2022-02-11 01:08:48,923 INFO L226 Difference]: Without dead ends: 25832 [2022-02-11 01:08:48,924 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2608 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1313, Invalid=6877, Unknown=0, NotChecked=0, Total=8190 [2022-02-11 01:08:48,924 INFO L934 BasicCegarLoop]: 55 mSDtfsCounter, 290 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1302 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:48,924 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 680 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1500 Invalid, 0 Unknown, 1302 Unchecked, 0.7s Time] [2022-02-11 01:08:48,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25832 states. [2022-02-11 01:08:49,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25832 to 14555. [2022-02-11 01:08:49,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14555 states, 14554 states have (on average 3.6130960560670604) internal successors, (52585), 14554 states have internal predecessors, (52585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:49,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14555 states to 14555 states and 52585 transitions. [2022-02-11 01:08:49,290 INFO L78 Accepts]: Start accepts. Automaton has 14555 states and 52585 transitions. Word has length 30 [2022-02-11 01:08:49,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:49,290 INFO L470 AbstractCegarLoop]: Abstraction has 14555 states and 52585 transitions. [2022-02-11 01:08:49,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:49,290 INFO L276 IsEmpty]: Start isEmpty. Operand 14555 states and 52585 transitions. [2022-02-11 01:08:49,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:08:49,314 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:49,314 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:49,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:49,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-11 01:08:49,527 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:49,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:49,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1700194329, now seen corresponding path program 52 times [2022-02-11 01:08:49,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:49,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358234549] [2022-02-11 01:08:49,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:49,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:49,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:49,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358234549] [2022-02-11 01:08:49,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358234549] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:49,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891559934] [2022-02-11 01:08:49,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:08:49,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:49,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:49,764 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) [2022-02-11 01:08:49,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-11 01:08:49,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:08:49,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:49,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 01:08:49,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:49,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:08:49,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:49,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-02-11 01:08:50,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:50,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2022-02-11 01:08:50,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:50,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-02-11 01:08:50,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 01:08:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:50,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:50,369 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:08:50,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 97 [2022-02-11 01:08:50,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:50,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:50,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:50,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 83 [2022-02-11 01:08:50,400 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:08:50,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 878 treesize of output 830 [2022-02-11 01:08:50,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:50,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:50,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:50,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-02-11 01:08:50,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:50,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:50,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:50,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-02-11 01:08:50,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:50,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:50,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:50,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891559934] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:50,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:50,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2022-02-11 01:08:50,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027040907] [2022-02-11 01:08:50,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:50,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 01:08:50,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:50,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 01:08:50,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:08:50,690 INFO L87 Difference]: Start difference. First operand 14555 states and 52585 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:51,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:51,824 INFO L93 Difference]: Finished difference Result 19873 states and 70314 transitions. [2022-02-11 01:08:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 01:08:51,825 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:08:51,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:51,875 INFO L225 Difference]: With dead ends: 19873 [2022-02-11 01:08:51,875 INFO L226 Difference]: Without dead ends: 19840 [2022-02-11 01:08:51,876 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 01:08:51,876 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 145 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:51,876 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 261 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:08:51,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19840 states. [2022-02-11 01:08:52,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19840 to 14402. [2022-02-11 01:08:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14402 states, 14401 states have (on average 3.616762724810777) internal successors, (52085), 14401 states have internal predecessors, (52085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:52,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 52085 transitions. [2022-02-11 01:08:52,244 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 52085 transitions. Word has length 30 [2022-02-11 01:08:52,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:52,244 INFO L470 AbstractCegarLoop]: Abstraction has 14402 states and 52085 transitions. [2022-02-11 01:08:52,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:52,244 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 52085 transitions. [2022-02-11 01:08:52,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 01:08:52,268 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:52,269 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:52,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:52,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-11 01:08:52,484 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:52,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:52,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1959107467, now seen corresponding path program 53 times [2022-02-11 01:08:52,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:52,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582894685] [2022-02-11 01:08:52,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:52,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:52,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:52,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582894685] [2022-02-11 01:08:52,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582894685] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:52,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561119415] [2022-02-11 01:08:52,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:08:52,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:52,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:52,524 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) [2022-02-11 01:08:52,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-11 01:08:52,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:08:52,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:52,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:08:52,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:52,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:52,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561119415] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:52,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:52,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-11 01:08:52,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314724436] [2022-02-11 01:08:52,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:52,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 01:08:52,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:52,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 01:08:52,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:08:52,681 INFO L87 Difference]: Start difference. First operand 14402 states and 52085 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2022-02-11 01:08:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:52,923 INFO L93 Difference]: Finished difference Result 18934 states and 66901 transitions. [2022-02-11 01:08:52,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 01:08:52,924 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 32 [2022-02-11 01:08:52,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:52,974 INFO L225 Difference]: With dead ends: 18934 [2022-02-11 01:08:52,974 INFO L226 Difference]: Without dead ends: 18868 [2022-02-11 01:08:52,974 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:08:52,974 INFO L934 BasicCegarLoop]: 45 mSDtfsCounter, 112 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:52,975 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 199 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:08:52,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18868 states. [2022-02-11 01:08:53,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18868 to 15192. [2022-02-11 01:08:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15192 states, 15191 states have (on average 3.615101046672372) internal successors, (54917), 15191 states have internal predecessors, (54917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15192 states to 15192 states and 54917 transitions. [2022-02-11 01:08:53,293 INFO L78 Accepts]: Start accepts. Automaton has 15192 states and 54917 transitions. Word has length 32 [2022-02-11 01:08:53,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:53,294 INFO L470 AbstractCegarLoop]: Abstraction has 15192 states and 54917 transitions. [2022-02-11 01:08:53,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2022-02-11 01:08:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 15192 states and 54917 transitions. [2022-02-11 01:08:53,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 01:08:53,319 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:53,319 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:53,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:53,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:53,532 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:53,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:53,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1104567263, now seen corresponding path program 54 times [2022-02-11 01:08:53,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:53,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847320472] [2022-02-11 01:08:53,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:53,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:08:53,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:53,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847320472] [2022-02-11 01:08:53,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847320472] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:53,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154203825] [2022-02-11 01:08:53,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:08:53,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:53,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:53,598 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) [2022-02-11 01:08:53,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-11 01:08:53,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 01:08:53,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:53,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:08:53,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:08:53,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:08:53,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154203825] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:53,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:53,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-02-11 01:08:53,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397739303] [2022-02-11 01:08:53,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:53,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:08:53,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:53,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:08:53,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:08:53,738 INFO L87 Difference]: Start difference. First operand 15192 states and 54917 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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) [2022-02-11 01:08:55,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:55,177 INFO L93 Difference]: Finished difference Result 35953 states and 124062 transitions. [2022-02-11 01:08:55,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-11 01:08:55,178 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 32 [2022-02-11 01:08:55,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:55,279 INFO L225 Difference]: With dead ends: 35953 [2022-02-11 01:08:55,279 INFO L226 Difference]: Without dead ends: 35659 [2022-02-11 01:08:55,280 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3652 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1722, Invalid=7784, Unknown=0, NotChecked=0, Total=9506 [2022-02-11 01:08:55,280 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 578 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:55,280 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 233 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:08:55,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35659 states. [2022-02-11 01:08:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35659 to 25698. [2022-02-11 01:08:55,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25698 states, 25697 states have (on average 3.710900105070631) internal successors, (95359), 25697 states have internal predecessors, (95359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:55,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25698 states to 25698 states and 95359 transitions. [2022-02-11 01:08:55,986 INFO L78 Accepts]: Start accepts. Automaton has 25698 states and 95359 transitions. Word has length 32 [2022-02-11 01:08:55,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:55,986 INFO L470 AbstractCegarLoop]: Abstraction has 25698 states and 95359 transitions. [2022-02-11 01:08:55,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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) [2022-02-11 01:08:55,986 INFO L276 IsEmpty]: Start isEmpty. Operand 25698 states and 95359 transitions. [2022-02-11 01:08:56,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 01:08:56,030 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:56,030 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:56,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:56,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:56,243 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:56,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:56,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1606264049, now seen corresponding path program 55 times [2022-02-11 01:08:56,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:56,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252602089] [2022-02-11 01:08:56,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:56,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:56,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:56,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:56,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252602089] [2022-02-11 01:08:56,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252602089] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:56,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487939036] [2022-02-11 01:08:56,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:08:56,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:56,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:56,276 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) [2022-02-11 01:08:56,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-11 01:08:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:56,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:08:56,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:56,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:56,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487939036] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:56,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:56,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 01:08:56,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361774671] [2022-02-11 01:08:56,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:56,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 01:08:56,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:56,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 01:08:56,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:08:56,412 INFO L87 Difference]: Start difference. First operand 25698 states and 95359 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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) [2022-02-11 01:08:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:56,728 INFO L93 Difference]: Finished difference Result 27246 states and 99861 transitions. [2022-02-11 01:08:56,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 01:08:56,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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 32 [2022-02-11 01:08:56,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:56,802 INFO L225 Difference]: With dead ends: 27246 [2022-02-11 01:08:56,802 INFO L226 Difference]: Without dead ends: 27222 [2022-02-11 01:08:56,802 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:08:56,803 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 70 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:56,804 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 119 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:08:56,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27222 states. [2022-02-11 01:08:57,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27222 to 25622. [2022-02-11 01:08:57,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25622 states, 25621 states have (on average 3.71164279302135) internal successors, (95096), 25621 states have internal predecessors, (95096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:57,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25622 states to 25622 states and 95096 transitions. [2022-02-11 01:08:57,348 INFO L78 Accepts]: Start accepts. Automaton has 25622 states and 95096 transitions. Word has length 32 [2022-02-11 01:08:57,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:57,348 INFO L470 AbstractCegarLoop]: Abstraction has 25622 states and 95096 transitions. [2022-02-11 01:08:57,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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) [2022-02-11 01:08:57,349 INFO L276 IsEmpty]: Start isEmpty. Operand 25622 states and 95096 transitions. [2022-02-11 01:08:57,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 01:08:57,391 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:57,391 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:57,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-02-11 01:08:57,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:57,607 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:57,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:57,607 INFO L85 PathProgramCache]: Analyzing trace with hash 252646705, now seen corresponding path program 56 times [2022-02-11 01:08:57,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:57,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409676406] [2022-02-11 01:08:57,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:57,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:08:57,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:57,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409676406] [2022-02-11 01:08:57,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409676406] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:57,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120579924] [2022-02-11 01:08:57,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:08:57,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:57,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:57,664 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) [2022-02-11 01:08:57,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-11 01:08:57,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:08:57,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:57,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:08:57,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:08:57,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:08:57,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120579924] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:57,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:57,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2022-02-11 01:08:57,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111647507] [2022-02-11 01:08:57,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:57,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 01:08:57,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:57,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 01:08:57,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-02-11 01:08:57,839 INFO L87 Difference]: Start difference. First operand 25622 states and 95096 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:59,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:59,373 INFO L93 Difference]: Finished difference Result 79810 states and 282459 transitions. [2022-02-11 01:08:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-11 01:08:59,374 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-11 01:08:59,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:59,646 INFO L225 Difference]: With dead ends: 79810 [2022-02-11 01:08:59,646 INFO L226 Difference]: Without dead ends: 79786 [2022-02-11 01:08:59,646 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2018 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1390, Invalid=4160, Unknown=0, NotChecked=0, Total=5550 [2022-02-11 01:08:59,646 INFO L934 BasicCegarLoop]: 39 mSDtfsCounter, 494 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:59,647 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 250 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:08:59,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79786 states. [2022-02-11 01:09:01,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79786 to 35022. [2022-02-11 01:09:01,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35022 states, 35021 states have (on average 3.7379572256646014) internal successors, (130907), 35021 states have internal predecessors, (130907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35022 states to 35022 states and 130907 transitions. [2022-02-11 01:09:01,286 INFO L78 Accepts]: Start accepts. Automaton has 35022 states and 130907 transitions. Word has length 32 [2022-02-11 01:09:01,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:01,286 INFO L470 AbstractCegarLoop]: Abstraction has 35022 states and 130907 transitions. [2022-02-11 01:09:01,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:01,286 INFO L276 IsEmpty]: Start isEmpty. Operand 35022 states and 130907 transitions. [2022-02-11 01:09:01,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 01:09:01,344 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:01,344 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:01,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:01,557 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,SelfDestructingSolverStorable63 [2022-02-11 01:09:01,557 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:01,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:01,557 INFO L85 PathProgramCache]: Analyzing trace with hash 58249501, now seen corresponding path program 57 times [2022-02-11 01:09:01,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:01,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061809881] [2022-02-11 01:09:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:01,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:09:01,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:01,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061809881] [2022-02-11 01:09:01,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061809881] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:01,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519952766] [2022-02-11 01:09:01,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:09:01,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:01,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:01,591 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) [2022-02-11 01:09:01,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-11 01:09:01,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-11 01:09:01,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:01,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-11 01:09:01,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:01,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:01,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519952766] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:01,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:01,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 10 [2022-02-11 01:09:01,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628314564] [2022-02-11 01:09:01,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:01,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:09:01,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:01,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:09:01,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:09:01,747 INFO L87 Difference]: Start difference. First operand 35022 states and 130907 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) [2022-02-11 01:09:03,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:03,169 INFO L93 Difference]: Finished difference Result 88617 states and 320525 transitions. [2022-02-11 01:09:03,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 01:09:03,170 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 32 [2022-02-11 01:09:03,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:03,685 INFO L225 Difference]: With dead ends: 88617 [2022-02-11 01:09:03,685 INFO L226 Difference]: Without dead ends: 88165 [2022-02-11 01:09:03,686 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=478, Invalid=1592, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 01:09:03,686 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 596 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:03,686 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 158 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:09:03,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88165 states. [2022-02-11 01:09:05,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88165 to 53900. [2022-02-11 01:09:05,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53900 states, 53899 states have (on average 3.7885860591105587) internal successors, (204201), 53899 states have internal predecessors, (204201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:06,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53900 states to 53900 states and 204201 transitions. [2022-02-11 01:09:06,008 INFO L78 Accepts]: Start accepts. Automaton has 53900 states and 204201 transitions. Word has length 32 [2022-02-11 01:09:06,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:06,008 INFO L470 AbstractCegarLoop]: Abstraction has 53900 states and 204201 transitions. [2022-02-11 01:09:06,008 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) [2022-02-11 01:09:06,008 INFO L276 IsEmpty]: Start isEmpty. Operand 53900 states and 204201 transitions. [2022-02-11 01:09:06,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 01:09:06,091 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:06,091 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:06,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-02-11 01:09:06,306 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,SelfDestructingSolverStorable64 [2022-02-11 01:09:06,307 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:06,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:06,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1948005981, now seen corresponding path program 58 times [2022-02-11 01:09:06,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:06,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888370818] [2022-02-11 01:09:06,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:06,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:09:06,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:06,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888370818] [2022-02-11 01:09:06,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888370818] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:06,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202178076] [2022-02-11 01:09:06,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:09:06,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:06,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:06,449 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) [2022-02-11 01:09:06,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-11 01:09:06,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:09:06,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:06,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:09:06,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:06,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:06,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202178076] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:06,624 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:06,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-02-11 01:09:06,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934941500] [2022-02-11 01:09:06,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:06,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 01:09:06,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:06,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 01:09:06,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-11 01:09:06,624 INFO L87 Difference]: Start difference. First operand 53900 states and 204201 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:08,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:08,629 INFO L93 Difference]: Finished difference Result 126257 states and 472403 transitions. [2022-02-11 01:09:08,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-11 01:09:08,629 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-11 01:09:08,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:09,154 INFO L225 Difference]: With dead ends: 126257 [2022-02-11 01:09:09,154 INFO L226 Difference]: Without dead ends: 125683 [2022-02-11 01:09:09,155 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=908, Invalid=3784, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 01:09:09,155 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 752 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:09,155 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 151 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:09:09,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125683 states. [2022-02-11 01:09:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125683 to 99474. [2022-02-11 01:09:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99474 states, 99473 states have (on average 3.860756185095453) internal successors, (384041), 99473 states have internal predecessors, (384041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99474 states to 99474 states and 384041 transitions. [2022-02-11 01:09:13,607 INFO L78 Accepts]: Start accepts. Automaton has 99474 states and 384041 transitions. Word has length 32 [2022-02-11 01:09:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:13,608 INFO L470 AbstractCegarLoop]: Abstraction has 99474 states and 384041 transitions. [2022-02-11 01:09:13,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:13,608 INFO L276 IsEmpty]: Start isEmpty. Operand 99474 states and 384041 transitions. [2022-02-11 01:09:13,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 01:09:13,992 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:13,992 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:14,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:14,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:14,208 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:14,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:14,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1979731235, now seen corresponding path program 59 times [2022-02-11 01:09:14,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:14,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442511812] [2022-02-11 01:09:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:14,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:09:14,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:14,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442511812] [2022-02-11 01:09:14,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442511812] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:14,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947311720] [2022-02-11 01:09:14,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:09:14,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:14,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:14,246 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) [2022-02-11 01:09:14,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-11 01:09:14,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:09:14,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:14,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:09:14,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:09:14,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:09:14,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947311720] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:14,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:14,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 01:09:14,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974168485] [2022-02-11 01:09:14,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:14,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 01:09:14,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:14,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 01:09:14,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:09:14,431 INFO L87 Difference]: Start difference. First operand 99474 states and 384041 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) [2022-02-11 01:09:15,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:15,494 INFO L93 Difference]: Finished difference Result 125056 states and 477423 transitions. [2022-02-11 01:09:15,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 01:09:15,494 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 32 [2022-02-11 01:09:15,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:16,277 INFO L225 Difference]: With dead ends: 125056 [2022-02-11 01:09:16,277 INFO L226 Difference]: Without dead ends: 125056 [2022-02-11 01:09:16,278 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:09:16,278 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 92 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:16,278 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 60 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:09:16,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125056 states. [2022-02-11 01:09:19,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125056 to 106002. [2022-02-11 01:09:19,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106002 states, 106001 states have (on average 3.8668974820992257) internal successors, (409895), 106001 states have internal predecessors, (409895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106002 states to 106002 states and 409895 transitions. [2022-02-11 01:09:20,074 INFO L78 Accepts]: Start accepts. Automaton has 106002 states and 409895 transitions. Word has length 32 [2022-02-11 01:09:20,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:20,074 INFO L470 AbstractCegarLoop]: Abstraction has 106002 states and 409895 transitions. [2022-02-11 01:09:20,074 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) [2022-02-11 01:09:20,075 INFO L276 IsEmpty]: Start isEmpty. Operand 106002 states and 409895 transitions. [2022-02-11 01:09:20,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 01:09:20,218 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:20,218 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:20,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:20,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:20,431 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:20,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:20,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1813915461, now seen corresponding path program 60 times [2022-02-11 01:09:20,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:20,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765741121] [2022-02-11 01:09:20,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:20,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:09:20,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:20,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765741121] [2022-02-11 01:09:20,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765741121] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:20,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717379865] [2022-02-11 01:09:20,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:09:20,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:20,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:20,465 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) [2022-02-11 01:09:20,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-11 01:09:20,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 01:09:20,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:20,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:09:20,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:09:20,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:09:20,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717379865] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:20,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:20,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-02-11 01:09:20,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967453834] [2022-02-11 01:09:20,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:20,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:09:20,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:20,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:09:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:09:20,621 INFO L87 Difference]: Start difference. First operand 106002 states and 409895 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) [2022-02-11 01:09:22,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:22,897 INFO L93 Difference]: Finished difference Result 147426 states and 553881 transitions. [2022-02-11 01:09:22,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-11 01:09:22,898 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 32 [2022-02-11 01:09:22,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:23,865 INFO L225 Difference]: With dead ends: 147426 [2022-02-11 01:09:23,866 INFO L226 Difference]: Without dead ends: 147296 [2022-02-11 01:09:23,866 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=684, Invalid=2738, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 01:09:23,866 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 499 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:23,866 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 199 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:09:24,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147296 states. [2022-02-11 01:09:27,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147296 to 112553. [2022-02-11 01:09:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112553 states, 112552 states have (on average 3.8479991470609143) internal successors, (433100), 112552 states have internal predecessors, (433100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:28,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112553 states to 112553 states and 433100 transitions. [2022-02-11 01:09:28,167 INFO L78 Accepts]: Start accepts. Automaton has 112553 states and 433100 transitions. Word has length 32 [2022-02-11 01:09:28,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:28,167 INFO L470 AbstractCegarLoop]: Abstraction has 112553 states and 433100 transitions. [2022-02-11 01:09:28,167 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) [2022-02-11 01:09:28,167 INFO L276 IsEmpty]: Start isEmpty. Operand 112553 states and 433100 transitions. [2022-02-11 01:09:28,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 01:09:28,317 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:28,317 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:28,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-02-11 01:09:28,531 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,SelfDestructingSolverStorable67 [2022-02-11 01:09:28,531 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:28,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:28,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1955119675, now seen corresponding path program 61 times [2022-02-11 01:09:28,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:28,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053881745] [2022-02-11 01:09:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:28,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:28,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:28,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053881745] [2022-02-11 01:09:28,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053881745] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:28,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13530461] [2022-02-11 01:09:28,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:09:28,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:28,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:28,564 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) [2022-02-11 01:09:28,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-11 01:09:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:28,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:09:28,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:09:28,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:09:28,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13530461] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:28,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:28,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 01:09:28,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206176118] [2022-02-11 01:09:28,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:28,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 01:09:28,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:28,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 01:09:28,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:09:28,704 INFO L87 Difference]: Start difference. First operand 112553 states and 433100 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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) [2022-02-11 01:09:29,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:29,834 INFO L93 Difference]: Finished difference Result 128721 states and 491820 transitions. [2022-02-11 01:09:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 01:09:29,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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 32 [2022-02-11 01:09:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:30,643 INFO L225 Difference]: With dead ends: 128721 [2022-02-11 01:09:30,643 INFO L226 Difference]: Without dead ends: 128703 [2022-02-11 01:09:30,644 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:09:30,644 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 108 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:30,644 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 88 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:09:30,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128703 states. [2022-02-11 01:09:33,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128703 to 119800. [2022-02-11 01:09:33,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119800 states, 119799 states have (on average 3.8597901484987354) internal successors, (462399), 119799 states have internal predecessors, (462399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:34,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119800 states to 119800 states and 462399 transitions. [2022-02-11 01:09:34,451 INFO L78 Accepts]: Start accepts. Automaton has 119800 states and 462399 transitions. Word has length 32 [2022-02-11 01:09:34,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:34,452 INFO L470 AbstractCegarLoop]: Abstraction has 119800 states and 462399 transitions. [2022-02-11 01:09:34,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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) [2022-02-11 01:09:34,452 INFO L276 IsEmpty]: Start isEmpty. Operand 119800 states and 462399 transitions. [2022-02-11 01:09:34,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 01:09:34,603 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:34,603 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:34,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-11 01:09:34,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-11 01:09:34,819 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:34,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:34,819 INFO L85 PathProgramCache]: Analyzing trace with hash -804316941, now seen corresponding path program 62 times [2022-02-11 01:09:34,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:34,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812324522] [2022-02-11 01:09:34,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:34,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:09:34,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:34,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812324522] [2022-02-11 01:09:34,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812324522] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:34,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841707170] [2022-02-11 01:09:34,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:09:34,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:34,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:34,851 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) [2022-02-11 01:09:34,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-11 01:09:35,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:09:35,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:35,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:09:35,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:09:35,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:09:35,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841707170] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:35,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:35,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2022-02-11 01:09:35,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746885927] [2022-02-11 01:09:35,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:35,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 01:09:35,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:35,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 01:09:35,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-11 01:09:35,360 INFO L87 Difference]: Start difference. First operand 119800 states and 462399 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:39,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:39,305 INFO L93 Difference]: Finished difference Result 306930 states and 1138918 transitions. [2022-02-11 01:09:39,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-11 01:09:39,305 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-11 01:09:39,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:42,114 INFO L225 Difference]: With dead ends: 306930 [2022-02-11 01:09:42,114 INFO L226 Difference]: Without dead ends: 306766 [2022-02-11 01:09:42,114 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1270, Invalid=4430, Unknown=0, NotChecked=0, Total=5700 [2022-02-11 01:09:42,115 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 504 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:42,115 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 280 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:09:42,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306766 states. [2022-02-11 01:09:50,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306766 to 209656. [2022-02-11 01:09:51,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209656 states, 209655 states have (on average 3.8897665211895736) internal successors, (815509), 209655 states have internal predecessors, (815509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:53,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209656 states to 209656 states and 815509 transitions. [2022-02-11 01:09:53,251 INFO L78 Accepts]: Start accepts. Automaton has 209656 states and 815509 transitions. Word has length 32 [2022-02-11 01:09:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:53,251 INFO L470 AbstractCegarLoop]: Abstraction has 209656 states and 815509 transitions. [2022-02-11 01:09:53,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:53,252 INFO L276 IsEmpty]: Start isEmpty. Operand 209656 states and 815509 transitions. [2022-02-11 01:09:53,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 01:09:53,551 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:53,551 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:53,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-02-11 01:09:53,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:53,767 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:53,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:53,768 INFO L85 PathProgramCache]: Analyzing trace with hash -593546441, now seen corresponding path program 63 times [2022-02-11 01:09:53,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:53,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625579131] [2022-02-11 01:09:53,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:53,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:53,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:53,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625579131] [2022-02-11 01:09:53,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625579131] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:53,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619923232] [2022-02-11 01:09:53,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:09:53,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:53,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:53,820 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) [2022-02-11 01:09:53,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-11 01:09:53,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-11 01:09:53,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:53,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:09:53,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:09:53,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:09:53,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619923232] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:53,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:53,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2022-02-11 01:09:53,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164380038] [2022-02-11 01:09:53,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:53,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:09:53,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:53,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:09:53,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:09:53,985 INFO L87 Difference]: Start difference. First operand 209656 states and 815509 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:58,250 INFO L93 Difference]: Finished difference Result 304768 states and 1123004 transitions. [2022-02-11 01:09:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 01:09:58,251 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-11 01:09:58,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:00,114 INFO L225 Difference]: With dead ends: 304768 [2022-02-11 01:10:00,114 INFO L226 Difference]: Without dead ends: 304472 [2022-02-11 01:10:00,114 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1313, Invalid=3943, Unknown=0, NotChecked=0, Total=5256 [2022-02-11 01:10:00,115 INFO L934 BasicCegarLoop]: 40 mSDtfsCounter, 625 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:00,115 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 353 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:10:00,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304472 states. [2022-02-11 01:10:07,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304472 to 149380. [2022-02-11 01:10:07,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149380 states, 149379 states have (on average 3.857938532189933) internal successors, (576295), 149379 states have internal predecessors, (576295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:08,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149380 states to 149380 states and 576295 transitions. [2022-02-11 01:10:08,585 INFO L78 Accepts]: Start accepts. Automaton has 149380 states and 576295 transitions. Word has length 32 [2022-02-11 01:10:08,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:08,585 INFO L470 AbstractCegarLoop]: Abstraction has 149380 states and 576295 transitions. [2022-02-11 01:10:08,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:08,585 INFO L276 IsEmpty]: Start isEmpty. Operand 149380 states and 576295 transitions. [2022-02-11 01:10:08,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 01:10:08,738 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:08,738 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:08,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:08,942 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,SelfDestructingSolverStorable70 [2022-02-11 01:10:08,942 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:08,943 INFO L85 PathProgramCache]: Analyzing trace with hash 785955533, now seen corresponding path program 64 times [2022-02-11 01:10:08,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:08,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545261305] [2022-02-11 01:10:08,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:08,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:08,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:08,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545261305] [2022-02-11 01:10:08,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545261305] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:08,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762130984] [2022-02-11 01:10:08,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:10:08,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:08,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:08,977 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) [2022-02-11 01:10:08,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-11 01:10:09,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:10:09,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:09,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:09,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:09,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:09,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762130984] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:09,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:09,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-11 01:10:09,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208729904] [2022-02-11 01:10:09,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:09,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-11 01:10:09,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:09,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-11 01:10:09,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-11 01:10:09,117 INFO L87 Difference]: Start difference. First operand 149380 states and 576295 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) [2022-02-11 01:10:10,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:10,839 INFO L93 Difference]: Finished difference Result 159580 states and 608890 transitions. [2022-02-11 01:10:10,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 01:10:10,839 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 32 [2022-02-11 01:10:10,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:11,572 INFO L225 Difference]: With dead ends: 159580 [2022-02-11 01:10:11,572 INFO L226 Difference]: Without dead ends: 159562 [2022-02-11 01:10:11,572 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:10:11,572 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 113 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:11,572 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 136 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:10:11,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159562 states. [2022-02-11 01:10:15,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159562 to 148130. [2022-02-11 01:10:15,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148130 states, 148129 states have (on average 3.840368867676147) internal successors, (568870), 148129 states have internal predecessors, (568870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:17,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148130 states to 148130 states and 568870 transitions. [2022-02-11 01:10:17,142 INFO L78 Accepts]: Start accepts. Automaton has 148130 states and 568870 transitions. Word has length 32 [2022-02-11 01:10:17,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:17,142 INFO L470 AbstractCegarLoop]: Abstraction has 148130 states and 568870 transitions. [2022-02-11 01:10:17,142 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) [2022-02-11 01:10:17,143 INFO L276 IsEmpty]: Start isEmpty. Operand 148130 states and 568870 transitions. [2022-02-11 01:10:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 01:10:17,333 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:17,333 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:17,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:17,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:17,547 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:17,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:17,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1387084889, now seen corresponding path program 65 times [2022-02-11 01:10:17,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:17,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308083987] [2022-02-11 01:10:17,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:17,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:17,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:17,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308083987] [2022-02-11 01:10:17,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308083987] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:17,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907702943] [2022-02-11 01:10:17,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:10:17,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:17,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:17,612 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) [2022-02-11 01:10:17,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-11 01:10:17,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:10:17,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:17,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:17,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:18,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:18,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907702943] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:18,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:18,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-11 01:10:18,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314244382] [2022-02-11 01:10:18,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:18,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 01:10:18,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:18,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 01:10:18,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:10:18,107 INFO L87 Difference]: Start difference. First operand 148130 states and 568870 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:20,035 INFO L93 Difference]: Finished difference Result 164627 states and 624211 transitions. [2022-02-11 01:10:20,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 01:10:20,036 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-11 01:10:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:21,414 INFO L225 Difference]: With dead ends: 164627 [2022-02-11 01:10:21,415 INFO L226 Difference]: Without dead ends: 164471 [2022-02-11 01:10:21,415 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:10:21,415 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 204 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:21,415 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 57 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:10:21,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164471 states. [2022-02-11 01:10:25,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164471 to 155402. [2022-02-11 01:10:25,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155402 states, 155401 states have (on average 3.8356831680619816) internal successors, (596069), 155401 states have internal predecessors, (596069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:26,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155402 states to 155402 states and 596069 transitions. [2022-02-11 01:10:26,785 INFO L78 Accepts]: Start accepts. Automaton has 155402 states and 596069 transitions. Word has length 32 [2022-02-11 01:10:26,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:26,785 INFO L470 AbstractCegarLoop]: Abstraction has 155402 states and 596069 transitions. [2022-02-11 01:10:26,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:26,785 INFO L276 IsEmpty]: Start isEmpty. Operand 155402 states and 596069 transitions. [2022-02-11 01:10:26,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 01:10:26,938 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:26,938 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:26,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:27,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:27,151 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:27,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:27,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1733314855, now seen corresponding path program 66 times [2022-02-11 01:10:27,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:27,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974606412] [2022-02-11 01:10:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:27,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:27,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:27,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974606412] [2022-02-11 01:10:27,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974606412] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:27,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011809895] [2022-02-11 01:10:27,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:10:27,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:27,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:27,192 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) [2022-02-11 01:10:27,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-11 01:10:27,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 01:10:27,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:27,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:27,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:10:27,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:10:27,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011809895] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:27,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:27,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 01:10:27,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157055642] [2022-02-11 01:10:27,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:27,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 01:10:27,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:27,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 01:10:27,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:10:27,329 INFO L87 Difference]: Start difference. First operand 155402 states and 596069 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2022-02-11 01:10:29,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:29,040 INFO L93 Difference]: Finished difference Result 181166 states and 684577 transitions. [2022-02-11 01:10:29,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 01:10:29,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 32 [2022-02-11 01:10:29,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:30,171 INFO L225 Difference]: With dead ends: 181166 [2022-02-11 01:10:30,171 INFO L226 Difference]: Without dead ends: 181166 [2022-02-11 01:10:30,171 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:10:30,171 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 129 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:30,171 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 58 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:10:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181166 states. [2022-02-11 01:10:34,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181166 to 155312. [2022-02-11 01:10:34,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155312 states, 155311 states have (on average 3.8357875488535904) internal successors, (595740), 155311 states have internal predecessors, (595740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155312 states to 155312 states and 595740 transitions. [2022-02-11 01:10:35,707 INFO L78 Accepts]: Start accepts. Automaton has 155312 states and 595740 transitions. Word has length 32 [2022-02-11 01:10:35,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:35,707 INFO L470 AbstractCegarLoop]: Abstraction has 155312 states and 595740 transitions. [2022-02-11 01:10:35,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2022-02-11 01:10:35,707 INFO L276 IsEmpty]: Start isEmpty. Operand 155312 states and 595740 transitions. [2022-02-11 01:10:35,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 01:10:35,866 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:35,866 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:35,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:36,080 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,SelfDestructingSolverStorable73 [2022-02-11 01:10:36,080 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:36,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:36,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1439066337, now seen corresponding path program 67 times [2022-02-11 01:10:36,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:36,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924595093] [2022-02-11 01:10:36,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:36,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:36,118 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:36,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924595093] [2022-02-11 01:10:36,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924595093] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:36,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972701014] [2022-02-11 01:10:36,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:10:36,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:36,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:36,119 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) [2022-02-11 01:10:36,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-11 01:10:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:36,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:36,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:36,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:36,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972701014] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:36,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:36,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-11 01:10:36,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630751319] [2022-02-11 01:10:36,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:36,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:10:36,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:36,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:10:36,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:10:36,296 INFO L87 Difference]: Start difference. First operand 155312 states and 595740 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:39,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:39,795 INFO L93 Difference]: Finished difference Result 226844 states and 855043 transitions. [2022-02-11 01:10:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-11 01:10:39,795 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-11 01:10:39,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:41,929 INFO L225 Difference]: With dead ends: 226844 [2022-02-11 01:10:41,929 INFO L226 Difference]: Without dead ends: 226494 [2022-02-11 01:10:41,929 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2711 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1367, Invalid=5605, Unknown=0, NotChecked=0, Total=6972 [2022-02-11 01:10:41,930 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 741 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:41,930 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 195 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:10:42,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226494 states. [2022-02-11 01:10:47,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226494 to 172378. [2022-02-11 01:10:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172378 states, 172377 states have (on average 3.8375131253009394) internal successors, (661499), 172377 states have internal predecessors, (661499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:49,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172378 states to 172378 states and 661499 transitions. [2022-02-11 01:10:49,245 INFO L78 Accepts]: Start accepts. Automaton has 172378 states and 661499 transitions. Word has length 32 [2022-02-11 01:10:49,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:49,245 INFO L470 AbstractCegarLoop]: Abstraction has 172378 states and 661499 transitions. [2022-02-11 01:10:49,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:49,245 INFO L276 IsEmpty]: Start isEmpty. Operand 172378 states and 661499 transitions. [2022-02-11 01:10:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 01:10:49,430 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:49,430 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:49,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:49,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:49,646 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:49,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:49,647 INFO L85 PathProgramCache]: Analyzing trace with hash -957000355, now seen corresponding path program 68 times [2022-02-11 01:10:49,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:49,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310177673] [2022-02-11 01:10:49,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:49,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:49,671 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:49,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310177673] [2022-02-11 01:10:49,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310177673] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:49,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668710395] [2022-02-11 01:10:49,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:10:49,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:49,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:49,672 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) [2022-02-11 01:10:49,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-11 01:10:49,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:10:49,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:49,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:49,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:49,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:49,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668710395] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:49,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:49,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 01:10:49,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636359183] [2022-02-11 01:10:49,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:49,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 01:10:49,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:49,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 01:10:49,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:10:49,812 INFO L87 Difference]: Start difference. First operand 172378 states and 661499 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) [2022-02-11 01:10:51,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:51,643 INFO L93 Difference]: Finished difference Result 180248 states and 686520 transitions. [2022-02-11 01:10:51,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 01:10:51,643 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 32 [2022-02-11 01:10:51,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:52,850 INFO L225 Difference]: With dead ends: 180248 [2022-02-11 01:10:52,850 INFO L226 Difference]: Without dead ends: 180232 [2022-02-11 01:10:52,851 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:10:52,851 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 112 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:52,851 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 95 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:10:53,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180232 states. [2022-02-11 01:10:57,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180232 to 172711. [2022-02-11 01:10:57,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172711 states, 172710 states have (on average 3.8327543280643854) internal successors, (661955), 172710 states have internal predecessors, (661955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:58,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172711 states to 172711 states and 661955 transitions. [2022-02-11 01:10:58,705 INFO L78 Accepts]: Start accepts. Automaton has 172711 states and 661955 transitions. Word has length 32 [2022-02-11 01:10:58,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:58,705 INFO L470 AbstractCegarLoop]: Abstraction has 172711 states and 661955 transitions. [2022-02-11 01:10:58,705 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) [2022-02-11 01:10:58,705 INFO L276 IsEmpty]: Start isEmpty. Operand 172711 states and 661955 transitions. [2022-02-11 01:10:59,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:10:59,206 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:59,206 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:59,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:59,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:59,422 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:59,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:59,422 INFO L85 PathProgramCache]: Analyzing trace with hash 851154315, now seen corresponding path program 69 times [2022-02-11 01:10:59,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:59,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064218477] [2022-02-11 01:10:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:59,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:59,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:59,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064218477] [2022-02-11 01:10:59,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064218477] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:59,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242118558] [2022-02-11 01:10:59,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:10:59,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:59,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:59,455 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) [2022-02-11 01:10:59,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-11 01:10:59,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:10:59,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:59,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:59,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:59,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:59,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242118558] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:59,624 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:59,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-11 01:10:59,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746650416] [2022-02-11 01:10:59,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:59,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 01:10:59,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:59,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 01:10:59,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:10:59,625 INFO L87 Difference]: Start difference. First operand 172711 states and 661955 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2022-02-11 01:11:01,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:01,938 INFO L93 Difference]: Finished difference Result 248684 states and 950787 transitions. [2022-02-11 01:11:01,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 01:11:01,939 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 33 [2022-02-11 01:11:01,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:03,448 INFO L225 Difference]: With dead ends: 248684 [2022-02-11 01:11:03,448 INFO L226 Difference]: Without dead ends: 246168 [2022-02-11 01:11:03,448 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:11:03,449 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 167 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:03,449 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 67 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:11:03,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246168 states. [2022-02-11 01:11:10,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246168 to 240164. [2022-02-11 01:11:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240164 states, 240163 states have (on average 3.7435783197245205) internal successors, (899069), 240163 states have internal predecessors, (899069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:13,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240164 states to 240164 states and 899069 transitions. [2022-02-11 01:11:13,526 INFO L78 Accepts]: Start accepts. Automaton has 240164 states and 899069 transitions. Word has length 33 [2022-02-11 01:11:13,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:13,526 INFO L470 AbstractCegarLoop]: Abstraction has 240164 states and 899069 transitions. [2022-02-11 01:11:13,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2022-02-11 01:11:13,526 INFO L276 IsEmpty]: Start isEmpty. Operand 240164 states and 899069 transitions. [2022-02-11 01:11:13,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:11:13,821 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:13,821 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:13,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-02-11 01:11:14,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:14,035 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:11:14,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:14,036 INFO L85 PathProgramCache]: Analyzing trace with hash -874131995, now seen corresponding path program 70 times [2022-02-11 01:11:14,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:14,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123937106] [2022-02-11 01:11:14,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:14,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:11:14,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:14,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123937106] [2022-02-11 01:11:14,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123937106] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:14,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360497898] [2022-02-11 01:11:14,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:11:14,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:14,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:14,103 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) [2022-02-11 01:11:14,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-11 01:11:14,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:11:14,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:11:14,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-11 01:11:14,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:11:14,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:11:14,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360497898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:14,320 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:14,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 01:11:14,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765658411] [2022-02-11 01:11:14,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:14,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 01:11:14,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 01:11:14,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:11:14,321 INFO L87 Difference]: Start difference. First operand 240164 states and 899069 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:18,910 INFO L93 Difference]: Finished difference Result 366756 states and 1359341 transitions. [2022-02-11 01:11:18,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 01:11:18,910 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 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 33 [2022-02-11 01:11:18,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:21,293 INFO L225 Difference]: With dead ends: 366756 [2022-02-11 01:11:21,294 INFO L226 Difference]: Without dead ends: 365198 [2022-02-11 01:11:21,294 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:11:21,294 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:21,294 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 48 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:11:21,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365198 states. [2022-02-11 01:11:32,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365198 to 337452. [2022-02-11 01:11:32,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337452 states, 337451 states have (on average 3.7411861277637346) internal successors, (1262467), 337451 states have internal predecessors, (1262467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337452 states to 337452 states and 1262467 transitions. [2022-02-11 01:11:35,627 INFO L78 Accepts]: Start accepts. Automaton has 337452 states and 1262467 transitions. Word has length 33 [2022-02-11 01:11:35,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:35,627 INFO L470 AbstractCegarLoop]: Abstraction has 337452 states and 1262467 transitions. [2022-02-11 01:11:35,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:35,627 INFO L276 IsEmpty]: Start isEmpty. Operand 337452 states and 1262467 transitions. [2022-02-11 01:11:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:11:36,582 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:36,582 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:36,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-11 01:11:36,795 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,SelfDestructingSolverStorable77 [2022-02-11 01:11:36,795 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:11:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:36,796 INFO L85 PathProgramCache]: Analyzing trace with hash 257831969, now seen corresponding path program 71 times [2022-02-11 01:11:36,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:36,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937929990] [2022-02-11 01:11:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:36,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-11 01:11:36,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:36,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937929990] [2022-02-11 01:11:36,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937929990] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:36,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968706374] [2022-02-11 01:11:36,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:11:36,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:36,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:36,850 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) [2022-02-11 01:11:36,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-11 01:11:36,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:11:36,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:11:36,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-11 01:11:36,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:36,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-02-11 01:11:36,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-02-11 01:11:37,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968706374] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:37,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:37,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 01:11:37,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368629361] [2022-02-11 01:11:37,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:37,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:11:37,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:37,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:11:37,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:11:37,022 INFO L87 Difference]: Start difference. First operand 337452 states and 1262467 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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) [2022-02-11 01:11:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:41,477 INFO L93 Difference]: Finished difference Result 366031 states and 1351232 transitions. [2022-02-11 01:11:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 01:11:41,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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 33 [2022-02-11 01:11:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:45,445 INFO L225 Difference]: With dead ends: 366031 [2022-02-11 01:11:45,459 INFO L226 Difference]: Without dead ends: 365962 [2022-02-11 01:11:45,459 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:11:45,459 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:45,459 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 62 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:11:46,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365962 states. [2022-02-11 01:11:56,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365962 to 335889. [2022-02-11 01:11:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335889 states, 335888 states have (on average 3.7307703758395654) internal successors, (1253121), 335888 states have internal predecessors, (1253121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:01,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335889 states to 335889 states and 1253121 transitions. [2022-02-11 01:12:01,906 INFO L78 Accepts]: Start accepts. Automaton has 335889 states and 1253121 transitions. Word has length 33 [2022-02-11 01:12:01,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:01,906 INFO L470 AbstractCegarLoop]: Abstraction has 335889 states and 1253121 transitions. [2022-02-11 01:12:01,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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) [2022-02-11 01:12:01,906 INFO L276 IsEmpty]: Start isEmpty. Operand 335889 states and 1253121 transitions. [2022-02-11 01:12:02,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:12:02,475 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:02,475 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:02,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:02,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:02,691 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:12:02,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:02,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2021221787, now seen corresponding path program 72 times [2022-02-11 01:12:02,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:02,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628103358] [2022-02-11 01:12:02,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:02,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:02,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:02,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628103358] [2022-02-11 01:12:02,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628103358] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:02,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609418973] [2022-02-11 01:12:02,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:12:02,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:02,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:02,762 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) [2022-02-11 01:12:02,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-11 01:12:02,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:12:02,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:02,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-11 01:12:02,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:02,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:02,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:02,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609418973] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:02,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:02,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2022-02-11 01:12:02,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717746657] [2022-02-11 01:12:02,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:02,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 01:12:02,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:02,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 01:12:03,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-02-11 01:12:03,004 INFO L87 Difference]: Start difference. First operand 335889 states and 1253121 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) [2022-02-11 01:12:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:05,234 INFO L93 Difference]: Finished difference Result 174680 states and 650006 transitions. [2022-02-11 01:12:05,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 01:12:05,254 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 33 [2022-02-11 01:12:05,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:06,556 INFO L225 Difference]: With dead ends: 174680 [2022-02-11 01:12:06,556 INFO L226 Difference]: Without dead ends: 173859 [2022-02-11 01:12:06,557 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:12:06,557 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 216 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:06,557 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 107 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:12:07,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173859 states. [2022-02-11 01:12:11,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173859 to 158612. [2022-02-11 01:12:12,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158612 states, 158611 states have (on average 3.7746562344351906) internal successors, (598702), 158611 states have internal predecessors, (598702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:13,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158612 states to 158612 states and 598702 transitions. [2022-02-11 01:12:13,391 INFO L78 Accepts]: Start accepts. Automaton has 158612 states and 598702 transitions. Word has length 33 [2022-02-11 01:12:13,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:13,391 INFO L470 AbstractCegarLoop]: Abstraction has 158612 states and 598702 transitions. [2022-02-11 01:12:13,391 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) [2022-02-11 01:12:13,391 INFO L276 IsEmpty]: Start isEmpty. Operand 158612 states and 598702 transitions. [2022-02-11 01:12:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-11 01:12:13,620 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:13,620 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:13,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:13,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:13,837 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:12:13,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:13,837 INFO L85 PathProgramCache]: Analyzing trace with hash -657949277, now seen corresponding path program 73 times [2022-02-11 01:12:13,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:13,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536084718] [2022-02-11 01:12:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:13,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-11 01:12:13,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:13,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536084718] [2022-02-11 01:12:13,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536084718] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:13,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054173252] [2022-02-11 01:12:13,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:12:13,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:13,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:13,867 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) [2022-02-11 01:12:13,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-11 01:12:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:13,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:12:13,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:12:14,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:12:14,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054173252] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:14,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:14,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-02-11 01:12:14,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954563997] [2022-02-11 01:12:14,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:14,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 01:12:14,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:14,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 01:12:14,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-02-11 01:12:14,096 INFO L87 Difference]: Start difference. First operand 158612 states and 598702 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:18,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:18,092 INFO L93 Difference]: Finished difference Result 248922 states and 921595 transitions. [2022-02-11 01:12:18,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 01:12:18,092 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 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 34 [2022-02-11 01:12:18,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:20,394 INFO L225 Difference]: With dead ends: 248922 [2022-02-11 01:12:20,394 INFO L226 Difference]: Without dead ends: 246356 [2022-02-11 01:12:20,394 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=517, Invalid=1205, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 01:12:20,394 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 300 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:20,394 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 112 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:12:20,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246356 states. [2022-02-11 01:12:24,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246356 to 122359. [2022-02-11 01:12:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122359 states, 122358 states have (on average 3.7970218539041176) internal successors, (464596), 122358 states have internal predecessors, (464596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:25,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122359 states to 122359 states and 464596 transitions. [2022-02-11 01:12:25,706 INFO L78 Accepts]: Start accepts. Automaton has 122359 states and 464596 transitions. Word has length 34 [2022-02-11 01:12:25,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:25,706 INFO L470 AbstractCegarLoop]: Abstraction has 122359 states and 464596 transitions. [2022-02-11 01:12:25,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:25,706 INFO L276 IsEmpty]: Start isEmpty. Operand 122359 states and 464596 transitions. [2022-02-11 01:12:25,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:12:25,860 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:25,860 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:25,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:26,075 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,SelfDestructingSolverStorable80 [2022-02-11 01:12:26,076 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:12:26,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:26,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1223761653, now seen corresponding path program 74 times [2022-02-11 01:12:26,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:26,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456295704] [2022-02-11 01:12:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:26,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:12:26,118 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:26,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456295704] [2022-02-11 01:12:26,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456295704] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:26,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853151148] [2022-02-11 01:12:26,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:12:26,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:26,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:26,120 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) [2022-02-11 01:12:26,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-11 01:12:26,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:12:26,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:26,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:12:26,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:26,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:26,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853151148] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:26,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:26,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-11 01:12:26,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095386889] [2022-02-11 01:12:26,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:26,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-11 01:12:26,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:26,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-11 01:12:26,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-11 01:12:26,268 INFO L87 Difference]: Start difference. First operand 122359 states and 464596 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) [2022-02-11 01:12:27,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:27,476 INFO L93 Difference]: Finished difference Result 128866 states and 487336 transitions. [2022-02-11 01:12:27,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 01:12:27,477 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 35 [2022-02-11 01:12:27,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:28,361 INFO L225 Difference]: With dead ends: 128866 [2022-02-11 01:12:28,361 INFO L226 Difference]: Without dead ends: 128688 [2022-02-11 01:12:28,362 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-02-11 01:12:28,362 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 130 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:28,362 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 67 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:12:28,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128688 states. [2022-02-11 01:12:31,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128688 to 127321. [2022-02-11 01:12:31,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127321 states, 127320 states have (on average 3.7852419101476595) internal successors, (481937), 127320 states have internal predecessors, (481937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:32,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127321 states to 127321 states and 481937 transitions. [2022-02-11 01:12:32,784 INFO L78 Accepts]: Start accepts. Automaton has 127321 states and 481937 transitions. Word has length 35 [2022-02-11 01:12:32,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:32,784 INFO L470 AbstractCegarLoop]: Abstraction has 127321 states and 481937 transitions. [2022-02-11 01:12:32,784 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) [2022-02-11 01:12:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand 127321 states and 481937 transitions. [2022-02-11 01:12:33,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:12:33,023 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:33,023 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:33,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:33,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:33,240 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:12:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:33,241 INFO L85 PathProgramCache]: Analyzing trace with hash -524603823, now seen corresponding path program 75 times [2022-02-11 01:12:33,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:33,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049884566] [2022-02-11 01:12:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:33,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:33,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:33,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049884566] [2022-02-11 01:12:33,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049884566] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:33,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495845983] [2022-02-11 01:12:33,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:12:33,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:33,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:33,306 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) [2022-02-11 01:12:33,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-11 01:12:33,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:12:33,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:33,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:12:33,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:12:33,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:12:33,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495845983] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:33,479 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:33,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 8 [2022-02-11 01:12:33,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729314649] [2022-02-11 01:12:33,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:33,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 01:12:33,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:33,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 01:12:33,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:12:33,479 INFO L87 Difference]: Start difference. First operand 127321 states and 481937 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) [2022-02-11 01:12:35,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:35,510 INFO L93 Difference]: Finished difference Result 151882 states and 564771 transitions. [2022-02-11 01:12:35,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 01:12:35,523 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 35 [2022-02-11 01:12:35,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:36,709 INFO L225 Difference]: With dead ends: 151882 [2022-02-11 01:12:36,709 INFO L226 Difference]: Without dead ends: 151789 [2022-02-11 01:12:36,710 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:12:36,710 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 93 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:36,711 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 85 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:12:36,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151789 states. [2022-02-11 01:12:40,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151789 to 141713. [2022-02-11 01:12:40,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141713 states, 141712 states have (on average 3.790561138082872) internal successors, (537168), 141712 states have internal predecessors, (537168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:41,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141713 states to 141713 states and 537168 transitions. [2022-02-11 01:12:41,606 INFO L78 Accepts]: Start accepts. Automaton has 141713 states and 537168 transitions. Word has length 35 [2022-02-11 01:12:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:41,606 INFO L470 AbstractCegarLoop]: Abstraction has 141713 states and 537168 transitions. [2022-02-11 01:12:41,607 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) [2022-02-11 01:12:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 141713 states and 537168 transitions. [2022-02-11 01:12:41,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:12:41,769 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:41,769 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:41,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:41,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:41,984 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:12:41,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:41,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1010926857, now seen corresponding path program 76 times [2022-02-11 01:12:41,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:41,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341471880] [2022-02-11 01:12:41,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:41,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:42,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:42,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341471880] [2022-02-11 01:12:42,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341471880] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:42,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439447146] [2022-02-11 01:12:42,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:12:42,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:42,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:42,056 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) [2022-02-11 01:12:42,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-11 01:12:42,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:12:42,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:42,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:12:42,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:12:42,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:12:42,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439447146] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:42,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:42,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-11 01:12:42,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756766304] [2022-02-11 01:12:42,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:42,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:12:42,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:42,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:12:42,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:12:42,254 INFO L87 Difference]: Start difference. First operand 141713 states and 537168 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:44,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:44,388 INFO L93 Difference]: Finished difference Result 162739 states and 597618 transitions. [2022-02-11 01:12:44,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 01:12:44,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:12:44,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:45,434 INFO L225 Difference]: With dead ends: 162739 [2022-02-11 01:12:45,434 INFO L226 Difference]: Without dead ends: 162639 [2022-02-11 01:12:45,435 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=581, Invalid=1675, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 01:12:45,435 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 299 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:45,435 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 229 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:12:45,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162639 states. [2022-02-11 01:12:49,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162639 to 141374. [2022-02-11 01:12:49,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141374 states, 141373 states have (on average 3.7643538723801573) internal successors, (532178), 141373 states have internal predecessors, (532178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141374 states to 141374 states and 532178 transitions. [2022-02-11 01:12:50,388 INFO L78 Accepts]: Start accepts. Automaton has 141374 states and 532178 transitions. Word has length 35 [2022-02-11 01:12:50,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:50,389 INFO L470 AbstractCegarLoop]: Abstraction has 141374 states and 532178 transitions. [2022-02-11 01:12:50,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:50,389 INFO L276 IsEmpty]: Start isEmpty. Operand 141374 states and 532178 transitions. [2022-02-11 01:12:50,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-11 01:12:50,595 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:50,595 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:50,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:50,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:50,807 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:12:50,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:50,808 INFO L85 PathProgramCache]: Analyzing trace with hash 47340655, now seen corresponding path program 77 times [2022-02-11 01:12:50,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:50,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753276389] [2022-02-11 01:12:50,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:50,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:51,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:51,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753276389] [2022-02-11 01:12:51,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753276389] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:51,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680730554] [2022-02-11 01:12:51,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:12:51,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:51,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:51,211 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) [2022-02-11 01:12:51,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-11 01:12:51,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:12:51,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:51,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 54 conjunts are in the unsatisfiable core [2022-02-11 01:12:51,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:51,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:12:51,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:12:51,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-02-11 01:12:51,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-02-11 01:12:51,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-02-11 01:12:51,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-02-11 01:12:51,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-11 01:12:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:52,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:52,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:52,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:52,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:52,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42254 treesize of output 39694