/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/prod-cons.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 18:01:26,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 18:01:26,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 18:01:26,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 18:01:26,798 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-01 18:01:26,813 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 18:01:26,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 18:01:26,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 18:01:26,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 18:01:26,814 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 18:01:26,814 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 18:01:26,815 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 18:01:26,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 18:01:26,815 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 18:01:26,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 18:01:26,816 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 18:01:26,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 18:01:26,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 18:01:26,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 18:01:26,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 18:01:26,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 18:01:26,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 18:01:26,816 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 18:01:26,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 18:01:26,817 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 18:01:26,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 18:01:26,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 18:01:26,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 18:01:26,817 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 18:01:26,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 18:01:26,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:01:26,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 18:01:26,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 18:01:26,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 18:01:26,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 18:01:26,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 18:01:26,818 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 18:01:26,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 18:01:26,818 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 18:01:27,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 18:01:27,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 18:01:27,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 18:01:27,030 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 18:01:27,031 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 18:01:27,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl [2022-03-01 18:01:27,032 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl' [2022-03-01 18:01:27,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 18:01:27,055 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 18:01:27,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 18:01:27,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 18:01:27,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 18:01:27,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:27" (1/1) ... [2022-03-01 18:01:27,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:27" (1/1) ... [2022-03-01 18:01:27,081 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 18:01:27,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 18:01:27,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 18:01:27,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 18:01:27,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 18:01:27,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:27" (1/1) ... [2022-03-01 18:01:27,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:27" (1/1) ... [2022-03-01 18:01:27,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:27" (1/1) ... [2022-03-01 18:01:27,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:27" (1/1) ... [2022-03-01 18:01:27,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:27" (1/1) ... [2022-03-01 18:01:27,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:27" (1/1) ... [2022-03-01 18:01:27,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:27" (1/1) ... [2022-03-01 18:01:27,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 18:01:27,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 18:01:27,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 18:01:27,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 18:01:27,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:27" (1/1) ... [2022-03-01 18:01:27,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:01:27,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:27,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-01 18:01:27,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-01 18:01:27,144 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 18:01:27,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 18:01:27,144 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 18:01:27,144 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 18:01:27,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 18:01:27,144 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 18:01:27,145 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 18:01:27,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 18:01:27,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 18:01:27,145 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 18:01:27,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 18:01:27,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 18:01:27,145 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 18:01:27,184 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 18:01:27,185 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 18:01:27,253 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 18:01:27,262 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 18:01:27,263 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 18:01:27,264 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:01:27 BoogieIcfgContainer [2022-03-01 18:01:27,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 18:01:27,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 18:01:27,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 18:01:27,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 18:01:27,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:27" (1/2) ... [2022-03-01 18:01:27,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba0fa5c and model type prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 06:01:27, skipping insertion in model container [2022-03-01 18:01:27,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:01:27" (2/2) ... [2022-03-01 18:01:27,277 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons.wvr.bpl [2022-03-01 18:01:27,280 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 18:01:27,280 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 18:01:27,281 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 18:01:27,281 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 18:01:27,324 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-01 18:01:27,371 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 18:01:27,375 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 18:01:27,375 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-01 18:01:27,381 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 30 transitions, 84 flow [2022-03-01 18:01:27,407 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 132 states, 131 states have (on average 2.5877862595419847) internal successors, (339), 131 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:27,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 131 states have (on average 2.5877862595419847) internal successors, (339), 131 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 18:01:27,415 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:27,415 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:01:27,416 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:01:27,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:27,419 INFO L85 PathProgramCache]: Analyzing trace with hash 785752709, now seen corresponding path program 1 times [2022-03-01 18:01:27,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:27,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640926938] [2022-03-01 18:01:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:27,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:27,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:27,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640926938] [2022-03-01 18:01:27,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640926938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:01:27,514 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:01:27,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:01:27,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447861546] [2022-03-01 18:01:27,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:01:27,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:01:27,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:27,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:01:27,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:01:27,538 INFO L87 Difference]: Start difference. First operand has 132 states, 131 states have (on average 2.5877862595419847) internal successors, (339), 131 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 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) [2022-03-01 18:01:27,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:27,589 INFO L93 Difference]: Finished difference Result 172 states and 413 transitions. [2022-03-01 18:01:27,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:01:27,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) 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 [2022-03-01 18:01:27,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:27,597 INFO L225 Difference]: With dead ends: 172 [2022-03-01 18:01:27,597 INFO L226 Difference]: Without dead ends: 109 [2022-03-01 18:01:27,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:01:27,600 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:27,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 25 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:01:27,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-01 18:01:27,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-01 18:01:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.3055555555555554) internal successors, (249), 108 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 249 transitions. [2022-03-01 18:01:27,690 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 249 transitions. Word has length 19 [2022-03-01 18:01:27,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:27,690 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 249 transitions. [2022-03-01 18:01:27,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) 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) [2022-03-01 18:01:27,691 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 249 transitions. [2022-03-01 18:01:27,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 18:01:27,692 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:27,692 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:01:27,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 18:01:27,692 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:01:27,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:27,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1380410419, now seen corresponding path program 2 times [2022-03-01 18:01:27,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:27,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843274109] [2022-03-01 18:01:27,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:27,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:27,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:27,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843274109] [2022-03-01 18:01:27,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843274109] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:01:27,733 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:01:27,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:01:27,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221018981] [2022-03-01 18:01:27,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:01:27,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:01:27,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:27,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:01:27,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:01:27,736 INFO L87 Difference]: Start difference. First operand 109 states and 249 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:27,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:27,800 INFO L93 Difference]: Finished difference Result 190 states and 436 transitions. [2022-03-01 18:01:27,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:01:27,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 18:01:27,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:27,803 INFO L225 Difference]: With dead ends: 190 [2022-03-01 18:01:27,803 INFO L226 Difference]: Without dead ends: 142 [2022-03-01 18:01:27,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:01:27,804 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:27,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 27 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:01:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-01 18:01:27,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-03-01 18:01:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3404255319148937) internal successors, (330), 141 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 330 transitions. [2022-03-01 18:01:27,816 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 330 transitions. Word has length 19 [2022-03-01 18:01:27,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:27,817 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 330 transitions. [2022-03-01 18:01:27,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:27,817 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 330 transitions. [2022-03-01 18:01:27,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:01:27,818 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:27,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:01:27,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 18:01:27,818 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:01:27,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:27,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1081760350, now seen corresponding path program 1 times [2022-03-01 18:01:27,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:27,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81759469] [2022-03-01 18:01:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:27,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:27,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:27,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81759469] [2022-03-01 18:01:27,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81759469] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:01:27,850 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:01:27,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:01:27,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57081871] [2022-03-01 18:01:27,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:01:27,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:01:27,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:27,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:01:27,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:01:27,852 INFO L87 Difference]: Start difference. First operand 142 states and 330 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:27,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:27,876 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2022-03-01 18:01:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:01:27,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:01:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:27,880 INFO L225 Difference]: With dead ends: 164 [2022-03-01 18:01:27,880 INFO L226 Difference]: Without dead ends: 152 [2022-03-01 18:01:27,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:01:27,881 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:27,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:01:27,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-01 18:01:27,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-03-01 18:01:27,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.3178807947019866) internal successors, (350), 151 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:27,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 350 transitions. [2022-03-01 18:01:27,890 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 350 transitions. Word has length 22 [2022-03-01 18:01:27,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:27,890 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 350 transitions. [2022-03-01 18:01:27,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:27,890 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 350 transitions. [2022-03-01 18:01:27,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 18:01:27,891 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:27,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:01:27,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 18:01:27,892 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:01:27,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:27,895 INFO L85 PathProgramCache]: Analyzing trace with hash -220317154, now seen corresponding path program 1 times [2022-03-01 18:01:27,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:27,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367085858] [2022-03-01 18:01:27,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:27,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:28,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:28,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367085858] [2022-03-01 18:01:28,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367085858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:28,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863194760] [2022-03-01 18:01:28,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:28,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:28,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:28,042 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:28,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 18:01:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:28,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 18:01:28,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:28,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:01:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:28,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:28,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:28,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-01 18:01:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:28,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863194760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:28,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:28,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-01 18:01:28,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006951457] [2022-03-01 18:01:28,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:28,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:01:28,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:28,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:01:28,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:01:28,638 INFO L87 Difference]: Start difference. First operand 152 states and 350 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 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) [2022-03-01 18:01:29,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:29,078 INFO L93 Difference]: Finished difference Result 358 states and 819 transitions. [2022-03-01 18:01:29,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:01:29,079 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 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 25 [2022-03-01 18:01:29,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:29,082 INFO L225 Difference]: With dead ends: 358 [2022-03-01 18:01:29,083 INFO L226 Difference]: Without dead ends: 268 [2022-03-01 18:01:29,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:01:29,087 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 251 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:29,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 115 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:01:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-03-01 18:01:29,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 185. [2022-03-01 18:01:29,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.342391304347826) internal successors, (431), 184 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 431 transitions. [2022-03-01 18:01:29,114 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 431 transitions. Word has length 25 [2022-03-01 18:01:29,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:29,115 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 431 transitions. [2022-03-01 18:01:29,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 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) [2022-03-01 18:01:29,115 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 431 transitions. [2022-03-01 18:01:29,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:01:29,116 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:29,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:01:29,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-01 18:01:29,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:29,341 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:01:29,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:29,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1335000105, now seen corresponding path program 2 times [2022-03-01 18:01:29,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:29,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759154714] [2022-03-01 18:01:29,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:29,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:29,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:29,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759154714] [2022-03-01 18:01:29,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759154714] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:29,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044457076] [2022-03-01 18:01:29,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:01:29,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:29,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:29,432 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:29,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 18:01:29,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:01:29,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:29,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 18:01:29,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:29,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:29,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044457076] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:29,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:29,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-01 18:01:29,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057814495] [2022-03-01 18:01:29,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:29,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:01:29,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:29,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:01:29,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:01:29,578 INFO L87 Difference]: Start difference. First operand 185 states and 431 transitions. Second operand has 5 states, 5 states have (on average 6.8) 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) [2022-03-01 18:01:29,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:29,605 INFO L93 Difference]: Finished difference Result 496 states and 1143 transitions. [2022-03-01 18:01:29,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:01:29,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) 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 [2022-03-01 18:01:29,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:29,616 INFO L225 Difference]: With dead ends: 496 [2022-03-01 18:01:29,617 INFO L226 Difference]: Without dead ends: 454 [2022-03-01 18:01:29,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:01:29,618 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:29,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 65 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:01:29,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-03-01 18:01:29,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 336. [2022-03-01 18:01:29,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.4298507462686567) internal successors, (814), 335 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:29,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 814 transitions. [2022-03-01 18:01:29,649 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 814 transitions. Word has length 28 [2022-03-01 18:01:29,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:29,650 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 814 transitions. [2022-03-01 18:01:29,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) 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) [2022-03-01 18:01:29,650 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 814 transitions. [2022-03-01 18:01:29,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:01:29,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:29,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:01:29,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:29,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:29,896 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:01:29,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:29,897 INFO L85 PathProgramCache]: Analyzing trace with hash -528291211, now seen corresponding path program 3 times [2022-03-01 18:01:29,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:29,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847533122] [2022-03-01 18:01:29,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:29,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:30,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:30,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847533122] [2022-03-01 18:01:30,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847533122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:30,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312373368] [2022-03-01 18:01:30,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:01:30,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:30,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:30,148 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:30,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 18:01:30,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:01:30,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:30,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 18:01:30,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:30,568 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:01:30,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 13 [2022-03-01 18:01:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:30,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:30,896 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:01:30,896 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 27 treesize of output 51 [2022-03-01 18:01:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:31,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312373368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:31,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:31,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-01 18:01:31,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568060956] [2022-03-01 18:01:31,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:31,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:01:31,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:31,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:01:31,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:01:31,150 INFO L87 Difference]: Start difference. First operand 336 states and 814 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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) [2022-03-01 18:01:38,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:38,108 INFO L93 Difference]: Finished difference Result 2570 states and 6225 transitions. [2022-03-01 18:01:38,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-03-01 18:01:38,109 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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 31 [2022-03-01 18:01:38,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:38,121 INFO L225 Difference]: With dead ends: 2570 [2022-03-01 18:01:38,123 INFO L226 Difference]: Without dead ends: 1697 [2022-03-01 18:01:38,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11757 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5243, Invalid=26977, Unknown=0, NotChecked=0, Total=32220 [2022-03-01 18:01:38,130 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1193 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:38,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 512 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-01 18:01:38,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2022-03-01 18:01:38,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 421. [2022-03-01 18:01:38,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.4642857142857144) internal successors, (1035), 420 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:38,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1035 transitions. [2022-03-01 18:01:38,157 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1035 transitions. Word has length 31 [2022-03-01 18:01:38,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:38,157 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 1035 transitions. [2022-03-01 18:01:38,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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) [2022-03-01 18:01:38,157 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1035 transitions. [2022-03-01 18:01:38,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:01:38,165 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:38,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:01:38,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:38,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:38,390 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:01:38,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:38,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1420855431, now seen corresponding path program 4 times [2022-03-01 18:01:38,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:38,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910741273] [2022-03-01 18:01:38,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:38,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:38,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:38,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910741273] [2022-03-01 18:01:38,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910741273] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:38,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213357592] [2022-03-01 18:01:38,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:01:38,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:38,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:38,610 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:38,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 18:01:38,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:01:38,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:38,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 18:01:38,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:38,962 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:01:38,963 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 13 [2022-03-01 18:01:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:39,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:39,225 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:01:39,225 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 27 treesize of output 51 [2022-03-01 18:01:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:39,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213357592] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:39,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:39,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-01 18:01:39,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289284320] [2022-03-01 18:01:39,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:39,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:01:39,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:39,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:01:39,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:01:39,455 INFO L87 Difference]: Start difference. First operand 421 states and 1035 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 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) [2022-03-01 18:01:43,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:43,966 INFO L93 Difference]: Finished difference Result 2028 states and 4820 transitions. [2022-03-01 18:01:43,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-01 18:01:43,967 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 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 31 [2022-03-01 18:01:43,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:43,976 INFO L225 Difference]: With dead ends: 2028 [2022-03-01 18:01:43,976 INFO L226 Difference]: Without dead ends: 1858 [2022-03-01 18:01:43,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5973 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3143, Invalid=14413, Unknown=0, NotChecked=0, Total=17556 [2022-03-01 18:01:43,981 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 550 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:43,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 293 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:01:43,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-03-01 18:01:44,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 477. [2022-03-01 18:01:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.4978991596638656) internal successors, (1189), 476 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1189 transitions. [2022-03-01 18:01:44,006 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1189 transitions. Word has length 31 [2022-03-01 18:01:44,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:44,006 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 1189 transitions. [2022-03-01 18:01:44,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 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) [2022-03-01 18:01:44,007 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1189 transitions. [2022-03-01 18:01:44,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:01:44,008 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:44,008 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:01:44,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:44,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:44,230 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:01:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:44,231 INFO L85 PathProgramCache]: Analyzing trace with hash 256367733, now seen corresponding path program 5 times [2022-03-01 18:01:44,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:44,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602514982] [2022-03-01 18:01:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:44,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:44,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:44,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602514982] [2022-03-01 18:01:44,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602514982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:44,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870982969] [2022-03-01 18:01:44,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:01:44,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:44,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:44,444 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:44,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 18:01:44,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:01:44,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:44,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 18:01:44,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:44,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:44,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:44,947 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 25 treesize of output 13 [2022-03-01 18:01:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:45,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:45,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:45,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:45,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:45,283 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 25 treesize of output 51 [2022-03-01 18:01:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:45,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870982969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:45,539 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:45,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-01 18:01:45,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603626010] [2022-03-01 18:01:45,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:45,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:01:45,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:45,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:01:45,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:01:45,541 INFO L87 Difference]: Start difference. First operand 477 states and 1189 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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) [2022-03-01 18:01:57,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:57,742 INFO L93 Difference]: Finished difference Result 6877 states and 16443 transitions. [2022-03-01 18:01:57,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-03-01 18:01:57,742 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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 31 [2022-03-01 18:01:57,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:57,770 INFO L225 Difference]: With dead ends: 6877 [2022-03-01 18:01:57,770 INFO L226 Difference]: Without dead ends: 5277 [2022-03-01 18:01:57,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38288 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=13473, Invalid=70917, Unknown=0, NotChecked=0, Total=84390 [2022-03-01 18:01:57,777 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1278 mSDsluCounter, 1871 mSDsCounter, 0 mSdLazyCounter, 2737 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 3667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 2737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:57,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1278 Valid, 1016 Invalid, 3667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 2737 Invalid, 0 Unknown, 323 Unchecked, 1.8s Time] [2022-03-01 18:01:57,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5277 states. [2022-03-01 18:01:57,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5277 to 959. [2022-03-01 18:01:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 2.6085594989561587) internal successors, (2499), 958 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:57,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 2499 transitions. [2022-03-01 18:01:57,817 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 2499 transitions. Word has length 31 [2022-03-01 18:01:57,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:57,818 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 2499 transitions. [2022-03-01 18:01:57,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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) [2022-03-01 18:01:57,818 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 2499 transitions. [2022-03-01 18:01:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:01:57,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:57,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:01:57,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:58,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:58,027 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:01:58,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:58,028 INFO L85 PathProgramCache]: Analyzing trace with hash 693727769, now seen corresponding path program 6 times [2022-03-01 18:01:58,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:58,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192731970] [2022-03-01 18:01:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:58,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:01:58,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:58,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192731970] [2022-03-01 18:01:58,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192731970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:58,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952281850] [2022-03-01 18:01:58,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:01:58,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:58,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:58,179 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:58,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 18:01:58,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:01:58,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:58,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 18:01:58,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:58,471 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:01:58,471 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 13 [2022-03-01 18:01:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:58,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:58,712 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:01:58,712 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 27 treesize of output 51 [2022-03-01 18:01:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:58,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952281850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:58,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:58,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 31 [2022-03-01 18:01:58,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515331760] [2022-03-01 18:01:58,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:58,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:01:58,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:58,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:01:58,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:01:58,910 INFO L87 Difference]: Start difference. First operand 959 states and 2499 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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) [2022-03-01 18:02:05,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:05,422 INFO L93 Difference]: Finished difference Result 5655 states and 14099 transitions. [2022-03-01 18:02:05,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-03-01 18:02:05,422 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 31 [2022-03-01 18:02:05,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:05,445 INFO L225 Difference]: With dead ends: 5655 [2022-03-01 18:02:05,445 INFO L226 Difference]: Without dead ends: 5002 [2022-03-01 18:02:05,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16724 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6779, Invalid=32623, Unknown=0, NotChecked=0, Total=39402 [2022-03-01 18:02:05,449 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 921 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 2189 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 2189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:02:05,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [921 Valid, 845 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 2189 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 18:02:05,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5002 states. [2022-03-01 18:02:05,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5002 to 1343. [2022-03-01 18:02:05,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 2.615499254843517) internal successors, (3510), 1342 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:05,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 3510 transitions. [2022-03-01 18:02:05,510 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 3510 transitions. Word has length 31 [2022-03-01 18:02:05,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:05,510 INFO L470 AbstractCegarLoop]: Abstraction has 1343 states and 3510 transitions. [2022-03-01 18:02:05,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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) [2022-03-01 18:02:05,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 3510 transitions. [2022-03-01 18:02:05,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:02:05,513 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:05,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:02:05,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-01 18:02:05,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:05,732 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:02:05,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:05,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2111481487, now seen corresponding path program 7 times [2022-03-01 18:02:05,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:05,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982288931] [2022-03-01 18:02:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:05,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:05,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:05,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982288931] [2022-03-01 18:02:05,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982288931] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:05,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076459689] [2022-03-01 18:02:05,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:02:05,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:05,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:05,898 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:02:05,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 18:02:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:05,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 18:02:05,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:06,289 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:02:06,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-01 18:02:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:06,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:06,567 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:02:06,567 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 27 treesize of output 51 [2022-03-01 18:02:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:06,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076459689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:06,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:06,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-01 18:02:06,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051483714] [2022-03-01 18:02:06,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:06,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:02:06,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:06,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:02:06,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:02:06,783 INFO L87 Difference]: Start difference. First operand 1343 states and 3510 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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) [2022-03-01 18:02:13,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:13,509 INFO L93 Difference]: Finished difference Result 3910 states and 9739 transitions. [2022-03-01 18:02:13,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-03-01 18:02:13,510 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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 31 [2022-03-01 18:02:13,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:13,523 INFO L225 Difference]: With dead ends: 3910 [2022-03-01 18:02:13,523 INFO L226 Difference]: Without dead ends: 2974 [2022-03-01 18:02:13,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10853 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5059, Invalid=25043, Unknown=0, NotChecked=0, Total=30102 [2022-03-01 18:02:13,526 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 754 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 2594 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 2594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:02:13,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 647 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 2594 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-01 18:02:13,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2974 states. [2022-03-01 18:02:13,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2974 to 1401. [2022-03-01 18:02:13,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 2.6135714285714284) internal successors, (3659), 1400 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:13,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 3659 transitions. [2022-03-01 18:02:13,568 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 3659 transitions. Word has length 31 [2022-03-01 18:02:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:13,569 INFO L470 AbstractCegarLoop]: Abstraction has 1401 states and 3659 transitions. [2022-03-01 18:02:13,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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) [2022-03-01 18:02:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 3659 transitions. [2022-03-01 18:02:13,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:02:13,572 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:13,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:02:13,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:13,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:13,797 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:02:13,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:13,798 INFO L85 PathProgramCache]: Analyzing trace with hash -911119041, now seen corresponding path program 8 times [2022-03-01 18:02:13,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:13,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771017465] [2022-03-01 18:02:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:13,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:02:13,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:13,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771017465] [2022-03-01 18:02:13,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771017465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:13,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492617853] [2022-03-01 18:02:13,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:02:13,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:13,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:13,998 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:02:13,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 18:02:14,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:02:14,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:14,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 18:02:14,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:14,322 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:02:14,322 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 13 [2022-03-01 18:02:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:14,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:14,561 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:02:14,561 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 27 treesize of output 51 [2022-03-01 18:02:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:14,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492617853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:14,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:14,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 31 [2022-03-01 18:02:14,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489999930] [2022-03-01 18:02:14,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:14,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:02:14,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:14,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:02:14,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:02:14,771 INFO L87 Difference]: Start difference. First operand 1401 states and 3659 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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) [2022-03-01 18:02:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:19,017 INFO L93 Difference]: Finished difference Result 3992 states and 9944 transitions. [2022-03-01 18:02:19,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-01 18:02:19,017 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 31 [2022-03-01 18:02:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:19,033 INFO L225 Difference]: With dead ends: 3992 [2022-03-01 18:02:19,033 INFO L226 Difference]: Without dead ends: 3412 [2022-03-01 18:02:19,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6022 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3275, Invalid=13495, Unknown=0, NotChecked=0, Total=16770 [2022-03-01 18:02:19,035 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 761 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:02:19,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 453 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 1616 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:02:19,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2022-03-01 18:02:19,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 1525. [2022-03-01 18:02:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 2.6122047244094486) internal successors, (3981), 1524 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:19,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 3981 transitions. [2022-03-01 18:02:19,089 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 3981 transitions. Word has length 31 [2022-03-01 18:02:19,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:19,089 INFO L470 AbstractCegarLoop]: Abstraction has 1525 states and 3981 transitions. [2022-03-01 18:02:19,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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) [2022-03-01 18:02:19,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 3981 transitions. [2022-03-01 18:02:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:02:19,092 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:19,093 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:02:19,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:19,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-01 18:02:19,308 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:02:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:19,308 INFO L85 PathProgramCache]: Analyzing trace with hash -2139987936, now seen corresponding path program 9 times [2022-03-01 18:02:19,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:19,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108085365] [2022-03-01 18:02:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:19,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:19,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:19,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108085365] [2022-03-01 18:02:19,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108085365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:19,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283083785] [2022-03-01 18:02:19,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:02:19,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:19,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:19,436 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:02:19,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 18:02:19,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:02:19,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:19,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:02:19,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:19,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:19,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283083785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:19,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:19,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-01 18:02:19,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758943318] [2022-03-01 18:02:19,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:19,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:02:19,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:19,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:02:19,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:02:19,585 INFO L87 Difference]: Start difference. First operand 1525 states and 3981 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:19,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:19,618 INFO L93 Difference]: Finished difference Result 2453 states and 6384 transitions. [2022-03-01 18:02:19,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:02:19,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 18:02:19,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:19,626 INFO L225 Difference]: With dead ends: 2453 [2022-03-01 18:02:19,626 INFO L226 Difference]: Without dead ends: 2396 [2022-03-01 18:02:19,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:02:19,627 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 79 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:02:19,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 70 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:02:19,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2022-03-01 18:02:19,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2033. [2022-03-01 18:02:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 2.6663385826771653) internal successors, (5418), 2032 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 5418 transitions. [2022-03-01 18:02:19,676 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 5418 transitions. Word has length 34 [2022-03-01 18:02:19,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:19,676 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 5418 transitions. [2022-03-01 18:02:19,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:19,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 5418 transitions. [2022-03-01 18:02:19,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:02:19,681 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:19,681 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:02:19,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:19,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:19,900 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:02:19,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:19,901 INFO L85 PathProgramCache]: Analyzing trace with hash -293873602, now seen corresponding path program 10 times [2022-03-01 18:02:19,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:19,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110511383] [2022-03-01 18:02:19,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:19,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:20,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:20,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110511383] [2022-03-01 18:02:20,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110511383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:20,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713820354] [2022-03-01 18:02:20,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:02:20,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:20,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:20,177 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:02:20,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 18:02:20,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:02:20,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:20,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:02:20,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:20,731 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-01 18:02:20,731 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 38 treesize of output 18 [2022-03-01 18:02:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:20,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:21,233 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:02:21,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-01 18:02:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:21,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713820354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:21,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:21,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-01 18:02:21,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981662959] [2022-03-01 18:02:21,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:21,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-01 18:02:21,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:21,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-01 18:02:21,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:02:21,948 INFO L87 Difference]: Start difference. First operand 2033 states and 5418 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:34,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:34,983 INFO L93 Difference]: Finished difference Result 7888 states and 19557 transitions. [2022-03-01 18:02:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-03-01 18:02:34,984 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:02:34,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:34,998 INFO L225 Difference]: With dead ends: 7888 [2022-03-01 18:02:34,998 INFO L226 Difference]: Without dead ends: 6844 [2022-03-01 18:02:35,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36898 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=13021, Invalid=78485, Unknown=0, NotChecked=0, Total=91506 [2022-03-01 18:02:35,002 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1619 mSDsluCounter, 2702 mSDsCounter, 0 mSdLazyCounter, 4785 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1619 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 5373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 4785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:02:35,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1619 Valid, 1449 Invalid, 5373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 4785 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-01 18:02:35,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2022-03-01 18:02:35,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 2385. [2022-03-01 18:02:35,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2384 states have (on average 2.670302013422819) internal successors, (6366), 2384 states have internal predecessors, (6366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:35,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 6366 transitions. [2022-03-01 18:02:35,065 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 6366 transitions. Word has length 37 [2022-03-01 18:02:35,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:35,066 INFO L470 AbstractCegarLoop]: Abstraction has 2385 states and 6366 transitions. [2022-03-01 18:02:35,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:35,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 6366 transitions. [2022-03-01 18:02:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:02:35,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:35,070 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:02:35,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:35,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-01 18:02:35,279 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:02:35,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:35,280 INFO L85 PathProgramCache]: Analyzing trace with hash 609080936, now seen corresponding path program 11 times [2022-03-01 18:02:35,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:35,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375470263] [2022-03-01 18:02:35,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:35,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:35,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:35,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375470263] [2022-03-01 18:02:35,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375470263] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:35,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974413741] [2022-03-01 18:02:35,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:02:35,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:35,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:35,521 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:02:35,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 18:02:35,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:02:35,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:35,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:02:35,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:36,005 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-01 18:02:36,005 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 38 treesize of output 18 [2022-03-01 18:02:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:36,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:36,536 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:02:36,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-01 18:02:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:37,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974413741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:37,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:37,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-01 18:02:37,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367521810] [2022-03-01 18:02:37,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:37,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-01 18:02:37,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:37,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-01 18:02:37,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1805, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:02:37,027 INFO L87 Difference]: Start difference. First operand 2385 states and 6366 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:57,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:57,670 INFO L93 Difference]: Finished difference Result 11643 states and 28850 transitions. [2022-03-01 18:02:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 336 states. [2022-03-01 18:02:57,671 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:02:57,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:57,688 INFO L225 Difference]: With dead ends: 11643 [2022-03-01 18:02:57,688 INFO L226 Difference]: Without dead ends: 10173 [2022-03-01 18:02:57,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 376 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59584 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=19211, Invalid=123295, Unknown=0, NotChecked=0, Total=142506 [2022-03-01 18:02:57,694 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 1401 mSDsluCounter, 3029 mSDsCounter, 0 mSdLazyCounter, 5917 mSolverCounterSat, 736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 6653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 736 IncrementalHoareTripleChecker+Valid, 5917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:02:57,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1401 Valid, 1490 Invalid, 6653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [736 Valid, 5917 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-01 18:02:57,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10173 states. [2022-03-01 18:02:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10173 to 2603. [2022-03-01 18:02:57,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.68293620292083) internal successors, (6981), 2602 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 6981 transitions. [2022-03-01 18:02:57,808 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 6981 transitions. Word has length 37 [2022-03-01 18:02:57,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:57,808 INFO L470 AbstractCegarLoop]: Abstraction has 2603 states and 6981 transitions. [2022-03-01 18:02:57,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:57,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 6981 transitions. [2022-03-01 18:02:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:02:57,812 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:57,813 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:02:57,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-01 18:02:58,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-01 18:02:58,030 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:02:58,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:58,030 INFO L85 PathProgramCache]: Analyzing trace with hash 725042942, now seen corresponding path program 12 times [2022-03-01 18:02:58,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:58,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932844004] [2022-03-01 18:02:58,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:58,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:58,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:58,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932844004] [2022-03-01 18:02:58,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932844004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:58,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664468719] [2022-03-01 18:02:58,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:02:58,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:58,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:58,241 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:02:58,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 18:02:58,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:02:58,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:58,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:02:58,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:59,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:59,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:59,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:59,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:59,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:59,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:59,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:02:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:59,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:59,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:59,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:59,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:59,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:59,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:59,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:59,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:02:59,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 32 treesize of output 92 [2022-03-01 18:03:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:00,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664468719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:03:00,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:03:00,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-01 18:03:00,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799735947] [2022-03-01 18:03:00,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:03:00,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-01 18:03:00,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:03:00,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-01 18:03:00,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1740, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:03:00,603 INFO L87 Difference]: Start difference. First operand 2603 states and 6981 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:03,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:03:03,681 INFO L93 Difference]: Finished difference Result 4636 states and 12333 transitions. [2022-03-01 18:03:03,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-01 18:03:03,687 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:03:03,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:03:03,713 INFO L225 Difference]: With dead ends: 4636 [2022-03-01 18:03:03,713 INFO L226 Difference]: Without dead ends: 4587 [2022-03-01 18:03:03,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4449 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2197, Invalid=11845, Unknown=0, NotChecked=0, Total=14042 [2022-03-01 18:03:03,718 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 288 mSDsluCounter, 1668 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1733 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:03:03,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 501 Invalid, 2493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 725 Invalid, 0 Unknown, 1733 Unchecked, 0.3s Time] [2022-03-01 18:03:03,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4587 states. [2022-03-01 18:03:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4587 to 2757. [2022-03-01 18:03:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2756 states have (on average 2.6756168359941945) internal successors, (7374), 2756 states have internal predecessors, (7374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:03,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 7374 transitions. [2022-03-01 18:03:03,793 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 7374 transitions. Word has length 37 [2022-03-01 18:03:03,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:03:03,794 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 7374 transitions. [2022-03-01 18:03:03,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:03,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 7374 transitions. [2022-03-01 18:03:03,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:03:03,801 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:03:03,801 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:03:03,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 18:03:04,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-01 18:03:04,027 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:03:04,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:03:04,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1062011650, now seen corresponding path program 13 times [2022-03-01 18:03:04,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:03:04,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777497787] [2022-03-01 18:03:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:03:04,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:03:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:03:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:04,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:03:04,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777497787] [2022-03-01 18:03:04,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777497787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:03:04,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276249657] [2022-03-01 18:03:04,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:03:04,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:03:04,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:03:04,326 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:03:04,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 18:03:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:03:04,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:03:04,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:03:04,828 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-01 18:03:04,829 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 38 treesize of output 18 [2022-03-01 18:03:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:04,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:03:05,387 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:03:05,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-01 18:03:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:05,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276249657] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:03:05,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:03:05,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-01 18:03:05,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187724376] [2022-03-01 18:03:05,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:03:05,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-01 18:03:05,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:03:05,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-01 18:03:05,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1804, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:03:05,850 INFO L87 Difference]: Start difference. First operand 2757 states and 7374 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:26,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:03:26,617 INFO L93 Difference]: Finished difference Result 13846 states and 34888 transitions. [2022-03-01 18:03:26,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 350 states. [2022-03-01 18:03:26,618 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:03:26,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:03:26,647 INFO L225 Difference]: With dead ends: 13846 [2022-03-01 18:03:26,648 INFO L226 Difference]: Without dead ends: 12834 [2022-03-01 18:03:26,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 390 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65124 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=20027, Invalid=133245, Unknown=0, NotChecked=0, Total=153272 [2022-03-01 18:03:26,656 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1134 mSDsluCounter, 3409 mSDsCounter, 0 mSdLazyCounter, 5924 mSolverCounterSat, 621 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 6545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 621 IncrementalHoareTripleChecker+Valid, 5924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:03:26,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1134 Valid, 1784 Invalid, 6545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [621 Valid, 5924 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-01 18:03:26,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12834 states. [2022-03-01 18:03:26,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12834 to 3327. [2022-03-01 18:03:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.7194828622970535) internal successors, (9045), 3326 states have internal predecessors, (9045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 9045 transitions. [2022-03-01 18:03:26,788 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 9045 transitions. Word has length 37 [2022-03-01 18:03:26,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:03:26,788 INFO L470 AbstractCegarLoop]: Abstraction has 3327 states and 9045 transitions. [2022-03-01 18:03:26,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:26,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 9045 transitions. [2022-03-01 18:03:26,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:03:26,796 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:03:26,796 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:03:26,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 18:03:27,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-01 18:03:27,020 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:03:27,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:03:27,021 INFO L85 PathProgramCache]: Analyzing trace with hash -2026265026, now seen corresponding path program 14 times [2022-03-01 18:03:27,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:03:27,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091496031] [2022-03-01 18:03:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:03:27,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:03:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:03:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:27,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:03:27,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091496031] [2022-03-01 18:03:27,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091496031] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:03:27,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821069678] [2022-03-01 18:03:27,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:03:27,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:03:27,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:03:27,287 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:03:27,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 18:03:27,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:03:27,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:03:27,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:03:27,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:03:27,919 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-01 18:03:27,919 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 38 treesize of output 18 [2022-03-01 18:03:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:27,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:03:28,363 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:03:28,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-01 18:03:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:28,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821069678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:03:28,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:03:28,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-01 18:03:28,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758836101] [2022-03-01 18:03:28,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:03:28,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-01 18:03:28,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:03:28,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-01 18:03:28,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1801, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:03:28,810 INFO L87 Difference]: Start difference. First operand 3327 states and 9045 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:49,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:03:49,506 INFO L93 Difference]: Finished difference Result 16809 states and 42113 transitions. [2022-03-01 18:03:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 373 states. [2022-03-01 18:03:49,507 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:03:49,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:03:49,528 INFO L225 Difference]: With dead ends: 16809 [2022-03-01 18:03:49,528 INFO L226 Difference]: Without dead ends: 14346 [2022-03-01 18:03:49,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76932 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=24383, Invalid=147427, Unknown=0, NotChecked=0, Total=171810 [2022-03-01 18:03:49,535 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1850 mSDsluCounter, 2489 mSDsCounter, 0 mSdLazyCounter, 4610 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1850 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 5525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 4610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:03:49,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1850 Valid, 1276 Invalid, 5525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 4610 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-01 18:03:49,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14346 states. [2022-03-01 18:03:49,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14346 to 3535. [2022-03-01 18:03:49,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 2.7190152801358236) internal successors, (9609), 3534 states have internal predecessors, (9609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 9609 transitions. [2022-03-01 18:03:49,670 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 9609 transitions. Word has length 37 [2022-03-01 18:03:49,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:03:49,670 INFO L470 AbstractCegarLoop]: Abstraction has 3535 states and 9609 transitions. [2022-03-01 18:03:49,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:49,671 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 9609 transitions. [2022-03-01 18:03:49,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:03:49,676 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:03:49,677 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:03:49,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-01 18:03:49,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:03:49,891 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:03:49,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:03:49,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1277334372, now seen corresponding path program 15 times [2022-03-01 18:03:49,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:03:49,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335825224] [2022-03-01 18:03:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:03:49,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:03:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:03:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:50,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:03:50,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335825224] [2022-03-01 18:03:50,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335825224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:03:50,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749484848] [2022-03-01 18:03:50,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:03:50,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:03:50,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:03:50,099 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:03:50,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 18:03:50,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:03:50,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:03:50,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 18:03:50,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:03:50,589 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-01 18:03:50,589 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 38 treesize of output 18 [2022-03-01 18:03:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:50,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:03:51,070 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:03:51,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 39 treesize of output 103 [2022-03-01 18:03:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:51,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749484848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:03:51,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:03:51,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-01 18:03:51,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621204099] [2022-03-01 18:03:51,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:03:51,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-01 18:03:51,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:03:51,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-01 18:03:51,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1810, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:03:51,671 INFO L87 Difference]: Start difference. First operand 3535 states and 9609 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:13,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:04:13,866 INFO L93 Difference]: Finished difference Result 15579 states and 39558 transitions. [2022-03-01 18:04:13,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 397 states. [2022-03-01 18:04:13,867 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:04:13,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:04:13,930 INFO L225 Difference]: With dead ends: 15579 [2022-03-01 18:04:13,930 INFO L226 Difference]: Without dead ends: 14122 [2022-03-01 18:04:13,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 437 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86518 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=24782, Invalid=167500, Unknown=0, NotChecked=0, Total=192282 [2022-03-01 18:04:13,940 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 1551 mSDsluCounter, 3347 mSDsCounter, 0 mSdLazyCounter, 6306 mSolverCounterSat, 820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 7126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 820 IncrementalHoareTripleChecker+Valid, 6306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:04:13,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1551 Valid, 1653 Invalid, 7126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [820 Valid, 6306 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-01 18:04:13,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14122 states. [2022-03-01 18:04:14,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14122 to 4322. [2022-03-01 18:04:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 4321 states have (on average 2.7283036334181903) internal successors, (11789), 4321 states have internal predecessors, (11789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:14,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 11789 transitions. [2022-03-01 18:04:14,067 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 11789 transitions. Word has length 37 [2022-03-01 18:04:14,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:04:14,067 INFO L470 AbstractCegarLoop]: Abstraction has 4322 states and 11789 transitions. [2022-03-01 18:04:14,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:14,067 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 11789 transitions. [2022-03-01 18:04:14,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:04:14,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:04:14,074 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:04:14,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 18:04:14,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-01 18:04:14,274 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:04:14,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:04:14,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1393296378, now seen corresponding path program 16 times [2022-03-01 18:04:14,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:04:14,275 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85040988] [2022-03-01 18:04:14,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:04:14,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:04:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:04:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:14,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:04:14,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85040988] [2022-03-01 18:04:14,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85040988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:04:14,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025461135] [2022-03-01 18:04:14,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:04:14,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:04:14,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:04:14,493 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:04:14,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 18:04:14,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:04:14,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:04:14,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:04:14,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:04:14,953 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-01 18:04:14,953 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 38 treesize of output 18 [2022-03-01 18:04:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:15,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:04:15,384 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:04:15,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-01 18:04:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:15,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025461135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:04:15,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:04:15,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-01 18:04:15,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962129202] [2022-03-01 18:04:15,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:04:15,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-01 18:04:15,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:04:15,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-01 18:04:15,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:04:15,902 INFO L87 Difference]: Start difference. First operand 4322 states and 11789 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:37,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:04:37,382 INFO L93 Difference]: Finished difference Result 19425 states and 50281 transitions. [2022-03-01 18:04:37,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 406 states. [2022-03-01 18:04:37,383 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:04:37,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:04:37,418 INFO L225 Difference]: With dead ends: 19425 [2022-03-01 18:04:37,418 INFO L226 Difference]: Without dead ends: 18389 [2022-03-01 18:04:37,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 446 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88585 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=23496, Invalid=176760, Unknown=0, NotChecked=0, Total=200256 [2022-03-01 18:04:37,427 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 1365 mSDsluCounter, 4482 mSDsCounter, 0 mSdLazyCounter, 7768 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1365 SdHoareTripleChecker+Valid, 2251 SdHoareTripleChecker+Invalid, 8521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 7768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:04:37,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1365 Valid, 2251 Invalid, 8521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 7768 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-01 18:04:37,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18389 states. [2022-03-01 18:04:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18389 to 5336. [2022-03-01 18:04:37,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5336 states, 5335 states have (on average 2.7321462043111526) internal successors, (14576), 5335 states have internal predecessors, (14576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:37,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5336 states to 5336 states and 14576 transitions. [2022-03-01 18:04:37,646 INFO L78 Accepts]: Start accepts. Automaton has 5336 states and 14576 transitions. Word has length 37 [2022-03-01 18:04:37,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:04:37,646 INFO L470 AbstractCegarLoop]: Abstraction has 5336 states and 14576 transitions. [2022-03-01 18:04:37,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:37,646 INFO L276 IsEmpty]: Start isEmpty. Operand 5336 states and 14576 transitions. [2022-03-01 18:04:37,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:04:37,654 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:04:37,654 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:04:37,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 18:04:37,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:04:37,867 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:04:37,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:04:37,868 INFO L85 PathProgramCache]: Analyzing trace with hash 730758682, now seen corresponding path program 17 times [2022-03-01 18:04:37,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:04:37,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724053018] [2022-03-01 18:04:37,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:04:37,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:04:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:04:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:04:38,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:04:38,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724053018] [2022-03-01 18:04:38,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724053018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:04:38,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149238511] [2022-03-01 18:04:38,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:04:38,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:04:38,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:04:38,088 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:04:38,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 18:04:38,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:04:38,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:04:38,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:04:38,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:04:38,536 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-01 18:04:38,536 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 38 treesize of output 18 [2022-03-01 18:04:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:38,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:04:38,945 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:04:38,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-01 18:04:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:39,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149238511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:04:39,371 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:04:39,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-01 18:04:39,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56876869] [2022-03-01 18:04:39,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:04:39,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-01 18:04:39,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:04:39,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-01 18:04:39,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1732, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:04:39,373 INFO L87 Difference]: Start difference. First operand 5336 states and 14576 transitions. Second operand has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:03,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:05:03,576 INFO L93 Difference]: Finished difference Result 19470 states and 50048 transitions. [2022-03-01 18:05:03,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 420 states. [2022-03-01 18:05:03,576 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:05:03,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:05:03,618 INFO L225 Difference]: With dead ends: 19470 [2022-03-01 18:05:03,619 INFO L226 Difference]: Without dead ends: 17725 [2022-03-01 18:05:03,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 459 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99488 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=31398, Invalid=180662, Unknown=0, NotChecked=0, Total=212060 [2022-03-01 18:05:03,632 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1706 mSDsluCounter, 3325 mSDsCounter, 0 mSdLazyCounter, 5853 mSolverCounterSat, 804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1706 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 6657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 804 IncrementalHoareTripleChecker+Valid, 5853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:05:03,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1706 Valid, 1784 Invalid, 6657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [804 Valid, 5853 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-01 18:05:03,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17725 states. [2022-03-01 18:05:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17725 to 6234. [2022-03-01 18:05:03,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6234 states, 6233 states have (on average 2.7328734156906784) internal successors, (17034), 6233 states have internal predecessors, (17034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:03,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6234 states to 6234 states and 17034 transitions. [2022-03-01 18:05:03,851 INFO L78 Accepts]: Start accepts. Automaton has 6234 states and 17034 transitions. Word has length 37 [2022-03-01 18:05:03,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:05:03,852 INFO L470 AbstractCegarLoop]: Abstraction has 6234 states and 17034 transitions. [2022-03-01 18:05:03,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:03,852 INFO L276 IsEmpty]: Start isEmpty. Operand 6234 states and 17034 transitions. [2022-03-01 18:05:03,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:05:03,861 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:05:03,862 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:05:03,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 18:05:04,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:05:04,087 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:05:04,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:05:04,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1515417626, now seen corresponding path program 18 times [2022-03-01 18:05:04,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:05:04,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764214495] [2022-03-01 18:05:04,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:05:04,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:05:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:05:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:04,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:05:04,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764214495] [2022-03-01 18:05:04,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764214495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:05:04,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309776551] [2022-03-01 18:05:04,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:05:04,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:05:04,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:05:04,399 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:05:04,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 18:05:04,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:05:04,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:05:04,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:05:04,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:05:04,959 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-01 18:05:04,959 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 38 treesize of output 18 [2022-03-01 18:05:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:05,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:05:05,510 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:05:05,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-01 18:05:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:06,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309776551] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:05:06,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:05:06,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-01 18:05:06,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873638836] [2022-03-01 18:05:06,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:05:06,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-01 18:05:06,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:05:06,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-01 18:05:06,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1726, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:05:06,040 INFO L87 Difference]: Start difference. First operand 6234 states and 17034 transitions. Second operand has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:32,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:05:32,017 INFO L93 Difference]: Finished difference Result 31234 states and 81888 transitions. [2022-03-01 18:05:32,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 427 states. [2022-03-01 18:05:32,017 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:05:32,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:05:32,080 INFO L225 Difference]: With dead ends: 31234 [2022-03-01 18:05:32,081 INFO L226 Difference]: Without dead ends: 28790 [2022-03-01 18:05:32,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 466 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103084 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=29621, Invalid=188935, Unknown=0, NotChecked=0, Total=218556 [2022-03-01 18:05:32,089 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 2195 mSDsluCounter, 3630 mSDsCounter, 0 mSdLazyCounter, 6351 mSolverCounterSat, 1169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2195 SdHoareTripleChecker+Valid, 1918 SdHoareTripleChecker+Invalid, 7520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1169 IncrementalHoareTripleChecker+Valid, 6351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:05:32,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2195 Valid, 1918 Invalid, 7520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1169 Valid, 6351 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-01 18:05:32,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28790 states. [2022-03-01 18:05:32,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28790 to 9104. [2022-03-01 18:05:32,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9104 states, 9103 states have (on average 2.730748105020323) internal successors, (24858), 9103 states have internal predecessors, (24858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:32,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9104 states to 9104 states and 24858 transitions. [2022-03-01 18:05:32,411 INFO L78 Accepts]: Start accepts. Automaton has 9104 states and 24858 transitions. Word has length 37 [2022-03-01 18:05:32,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:05:32,411 INFO L470 AbstractCegarLoop]: Abstraction has 9104 states and 24858 transitions. [2022-03-01 18:05:32,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:32,411 INFO L276 IsEmpty]: Start isEmpty. Operand 9104 states and 24858 transitions. [2022-03-01 18:05:32,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:05:32,425 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:05:32,425 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:05:32,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 18:05:32,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:05:32,633 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:05:32,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:05:32,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1952777662, now seen corresponding path program 19 times [2022-03-01 18:05:32,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:05:32,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772819330] [2022-03-01 18:05:32,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:05:32,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:05:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:05:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:05:32,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:05:32,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772819330] [2022-03-01 18:05:32,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772819330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:05:32,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553712768] [2022-03-01 18:05:32,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:05:32,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:05:32,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:05:32,842 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:05:32,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 18:05:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:05:32,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:05:32,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:05:33,378 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-01 18:05:33,379 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 38 treesize of output 18 [2022-03-01 18:05:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:33,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:05:33,835 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:05:33,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-01 18:05:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:34,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553712768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:05:34,330 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:05:34,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-03-01 18:05:34,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486271199] [2022-03-01 18:05:34,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:05:34,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-01 18:05:34,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:05:34,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-01 18:05:34,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1634, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:05:34,331 INFO L87 Difference]: Start difference. First operand 9104 states and 24858 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:53,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:05:53,349 INFO L93 Difference]: Finished difference Result 32667 states and 86823 transitions. [2022-03-01 18:05:53,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 354 states. [2022-03-01 18:05:53,349 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:05:53,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:05:53,407 INFO L225 Difference]: With dead ends: 32667 [2022-03-01 18:05:53,407 INFO L226 Difference]: Without dead ends: 31087 [2022-03-01 18:05:53,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71981 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=22308, Invalid=132534, Unknown=0, NotChecked=0, Total=154842 [2022-03-01 18:05:53,413 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1751 mSDsluCounter, 4735 mSDsCounter, 0 mSdLazyCounter, 7318 mSolverCounterSat, 963 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1751 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 8281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 7318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:05:53,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1751 Valid, 2646 Invalid, 8281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [963 Valid, 7318 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-01 18:05:53,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31087 states. [2022-03-01 18:05:53,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31087 to 11836. [2022-03-01 18:05:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11836 states, 11835 states have (on average 2.7356991972961553) internal successors, (32377), 11835 states have internal predecessors, (32377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11836 states to 11836 states and 32377 transitions. [2022-03-01 18:05:53,723 INFO L78 Accepts]: Start accepts. Automaton has 11836 states and 32377 transitions. Word has length 37 [2022-03-01 18:05:53,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:05:53,723 INFO L470 AbstractCegarLoop]: Abstraction has 11836 states and 32377 transitions. [2022-03-01 18:05:53,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:53,723 INFO L276 IsEmpty]: Start isEmpty. Operand 11836 states and 32377 transitions. [2022-03-01 18:05:53,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:05:53,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:05:53,738 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:05:53,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 18:05:53,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:05:53,939 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:05:53,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:05:53,939 INFO L85 PathProgramCache]: Analyzing trace with hash 732190768, now seen corresponding path program 20 times [2022-03-01 18:05:53,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:05:53,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693121090] [2022-03-01 18:05:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:05:53,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:05:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:05:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:54,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:05:54,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693121090] [2022-03-01 18:05:54,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693121090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:05:54,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360058895] [2022-03-01 18:05:54,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:05:54,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:05:54,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:05:54,152 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:05:54,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 18:05:54,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:05:54,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:05:54,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:05:54,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:05:54,662 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-01 18:05:54,663 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 38 treesize of output 18 [2022-03-01 18:05:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:54,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:05:55,098 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:05:55,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-01 18:05:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:55,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360058895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:05:55,608 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:05:55,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-01 18:05:55,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632533644] [2022-03-01 18:05:55,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:05:55,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-01 18:05:55,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:05:55,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-01 18:05:55,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1722, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:05:55,610 INFO L87 Difference]: Start difference. First operand 11836 states and 32377 transitions. Second operand has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:12,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:12,786 INFO L93 Difference]: Finished difference Result 33473 states and 89499 transitions. [2022-03-01 18:06:12,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 328 states. [2022-03-01 18:06:12,786 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:06:12,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:12,847 INFO L225 Difference]: With dead ends: 33473 [2022-03-01 18:06:12,847 INFO L226 Difference]: Without dead ends: 31834 [2022-03-01 18:06:12,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 367 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60160 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=20754, Invalid=115038, Unknown=0, NotChecked=0, Total=135792 [2022-03-01 18:06:12,852 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 1317 mSDsluCounter, 2965 mSDsCounter, 0 mSdLazyCounter, 5366 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 6074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 5366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:12,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1317 Valid, 1506 Invalid, 6074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 5366 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-01 18:06:12,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31834 states. [2022-03-01 18:06:13,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31834 to 12555. [2022-03-01 18:06:13,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12555 states, 12554 states have (on average 2.736498327226382) internal successors, (34354), 12554 states have internal predecessors, (34354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:13,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12555 states to 12555 states and 34354 transitions. [2022-03-01 18:06:13,236 INFO L78 Accepts]: Start accepts. Automaton has 12555 states and 34354 transitions. Word has length 37 [2022-03-01 18:06:13,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:13,236 INFO L470 AbstractCegarLoop]: Abstraction has 12555 states and 34354 transitions. [2022-03-01 18:06:13,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:13,237 INFO L276 IsEmpty]: Start isEmpty. Operand 12555 states and 34354 transitions. [2022-03-01 18:06:13,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:06:13,253 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:13,253 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:06:13,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-01 18:06:13,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-01 18:06:13,467 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:13,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:13,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1932553214, now seen corresponding path program 21 times [2022-03-01 18:06:13,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:13,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182768204] [2022-03-01 18:06:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:13,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:06:13,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:13,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182768204] [2022-03-01 18:06:13,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182768204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:13,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133495674] [2022-03-01 18:06:13,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:06:13,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:13,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:13,696 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:13,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 18:06:13,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:06:13,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:13,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 18:06:13,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:14,143 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-01 18:06:14,143 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 38 treesize of output 18 [2022-03-01 18:06:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:14,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:14,566 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:06:14,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 39 treesize of output 103 [2022-03-01 18:06:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:15,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133495674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:15,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:15,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-03-01 18:06:15,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317752747] [2022-03-01 18:06:15,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:15,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-01 18:06:15,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:15,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-01 18:06:15,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:06:15,014 INFO L87 Difference]: Start difference. First operand 12555 states and 34354 transitions. Second operand has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:30,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:30,010 INFO L93 Difference]: Finished difference Result 33192 states and 88992 transitions. [2022-03-01 18:06:30,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 282 states. [2022-03-01 18:06:30,010 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:06:30,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:30,079 INFO L225 Difference]: With dead ends: 33192 [2022-03-01 18:06:30,079 INFO L226 Difference]: Without dead ends: 31790 [2022-03-01 18:06:30,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43653 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=16321, Invalid=87041, Unknown=0, NotChecked=0, Total=103362 [2022-03-01 18:06:30,083 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 1114 mSDsluCounter, 3202 mSDsCounter, 0 mSdLazyCounter, 5203 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1794 SdHoareTripleChecker+Invalid, 5820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 5203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:30,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 1794 Invalid, 5820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 5203 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-01 18:06:30,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31790 states. [2022-03-01 18:06:30,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31790 to 13207. [2022-03-01 18:06:30,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13207 states, 13206 states have (on average 2.7397395123428745) internal successors, (36181), 13206 states have internal predecessors, (36181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:30,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13207 states to 13207 states and 36181 transitions. [2022-03-01 18:06:30,439 INFO L78 Accepts]: Start accepts. Automaton has 13207 states and 36181 transitions. Word has length 37 [2022-03-01 18:06:30,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:30,439 INFO L470 AbstractCegarLoop]: Abstraction has 13207 states and 36181 transitions. [2022-03-01 18:06:30,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:30,440 INFO L276 IsEmpty]: Start isEmpty. Operand 13207 states and 36181 transitions. [2022-03-01 18:06:30,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:06:30,456 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:30,457 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:06:30,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:30,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-01 18:06:30,662 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:30,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:30,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1784070594, now seen corresponding path program 22 times [2022-03-01 18:06:30,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:30,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602684430] [2022-03-01 18:06:30,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:30,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:30,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:30,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602684430] [2022-03-01 18:06:30,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602684430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:30,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208966124] [2022-03-01 18:06:30,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:06:30,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:30,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:30,976 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:30,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 18:06:31,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:06:31,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:31,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:06:31,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:31,443 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-01 18:06:31,444 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 38 treesize of output 18 [2022-03-01 18:06:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:31,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:31,873 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:06:31,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-01 18:06:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:32,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208966124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:32,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:32,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-01 18:06:32,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605507616] [2022-03-01 18:06:32,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:32,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-01 18:06:32,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:32,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-01 18:06:32,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1782, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:06:32,338 INFO L87 Difference]: Start difference. First operand 13207 states and 36181 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:42,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:42,412 INFO L93 Difference]: Finished difference Result 27912 states and 74844 transitions. [2022-03-01 18:06:42,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2022-03-01 18:06:42,412 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:06:42,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:42,477 INFO L225 Difference]: With dead ends: 27912 [2022-03-01 18:06:42,477 INFO L226 Difference]: Without dead ends: 27500 [2022-03-01 18:06:42,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22323 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=8313, Invalid=50009, Unknown=0, NotChecked=0, Total=58322 [2022-03-01 18:06:42,481 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 1123 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 3131 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 3582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 3131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:42,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1123 Valid, 536 Invalid, 3582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 3131 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 18:06:42,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27500 states. [2022-03-01 18:06:42,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27500 to 13985. [2022-03-01 18:06:42,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13985 states, 13984 states have (on average 2.7281893592677346) internal successors, (38151), 13984 states have internal predecessors, (38151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:42,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13985 states to 13985 states and 38151 transitions. [2022-03-01 18:06:42,853 INFO L78 Accepts]: Start accepts. Automaton has 13985 states and 38151 transitions. Word has length 37 [2022-03-01 18:06:42,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:42,853 INFO L470 AbstractCegarLoop]: Abstraction has 13985 states and 38151 transitions. [2022-03-01 18:06:42,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:42,853 INFO L276 IsEmpty]: Start isEmpty. Operand 13985 states and 38151 transitions. [2022-03-01 18:06:42,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:06:42,870 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:42,870 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:06:42,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:43,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:43,071 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:43,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:43,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1519528804, now seen corresponding path program 23 times [2022-03-01 18:06:43,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:43,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127644356] [2022-03-01 18:06:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:43,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:43,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:43,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127644356] [2022-03-01 18:06:43,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127644356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:43,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605046729] [2022-03-01 18:06:43,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:06:43,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:43,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:43,280 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:43,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 18:06:43,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:06:43,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:43,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:06:43,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:43,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:06:43,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:06:43,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:06:43,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:06:43,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:06:43,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:06:43,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-03-01 18:06:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:43,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:44,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:06:44,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:06:44,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:06:44,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:06:44,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:06:44,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:06:44,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:06:44,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:06:44,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 98 [2022-03-01 18:06:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:44,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605046729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:44,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:44,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-01 18:06:44,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062222578] [2022-03-01 18:06:44,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:44,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-01 18:06:44,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:44,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-01 18:06:44,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1785, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:06:44,711 INFO L87 Difference]: Start difference. First operand 13985 states and 38151 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:58,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:58,926 INFO L93 Difference]: Finished difference Result 32196 states and 85016 transitions. [2022-03-01 18:06:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-03-01 18:06:58,928 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:06:58,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:58,986 INFO L225 Difference]: With dead ends: 32196 [2022-03-01 18:06:58,986 INFO L226 Difference]: Without dead ends: 30842 [2022-03-01 18:06:58,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39555 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=13928, Invalid=77578, Unknown=0, NotChecked=0, Total=91506 [2022-03-01 18:06:58,991 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1177 mSDsluCounter, 3531 mSDsCounter, 0 mSdLazyCounter, 4436 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 5681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 4436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 620 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:58,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 1987 Invalid, 5681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 4436 Invalid, 0 Unknown, 620 Unchecked, 2.1s Time] [2022-03-01 18:06:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30842 states. [2022-03-01 18:06:59,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30842 to 14560. [2022-03-01 18:06:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14560 states, 14559 states have (on average 2.7218215536781374) internal successors, (39627), 14559 states have internal predecessors, (39627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14560 states to 14560 states and 39627 transitions. [2022-03-01 18:06:59,412 INFO L78 Accepts]: Start accepts. Automaton has 14560 states and 39627 transitions. Word has length 37 [2022-03-01 18:06:59,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:59,412 INFO L470 AbstractCegarLoop]: Abstraction has 14560 states and 39627 transitions. [2022-03-01 18:06:59,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:59,413 INFO L276 IsEmpty]: Start isEmpty. Operand 14560 states and 39627 transitions. [2022-03-01 18:06:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:06:59,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:59,429 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:06:59,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:59,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:59,629 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:59,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:59,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1684148304, now seen corresponding path program 24 times [2022-03-01 18:06:59,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:59,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766260229] [2022-03-01 18:06:59,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:59,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:06:59,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:59,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766260229] [2022-03-01 18:06:59,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766260229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:59,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159163917] [2022-03-01 18:06:59,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:06:59,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:59,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:59,816 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:59,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 18:06:59,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:06:59,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:59,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:06:59,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:00,276 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-01 18:07:00,277 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 38 treesize of output 18 [2022-03-01 18:07:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:00,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:00,696 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:07:00,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-01 18:07:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:01,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159163917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:01,084 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:01,084 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-03-01 18:07:01,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057038230] [2022-03-01 18:07:01,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:01,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-01 18:07:01,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:01,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-01 18:07:01,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:07:01,085 INFO L87 Difference]: Start difference. First operand 14560 states and 39627 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:13,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:13,916 INFO L93 Difference]: Finished difference Result 31171 states and 82882 transitions. [2022-03-01 18:07:13,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2022-03-01 18:07:13,916 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:07:13,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:13,982 INFO L225 Difference]: With dead ends: 31171 [2022-03-01 18:07:13,982 INFO L226 Difference]: Without dead ends: 30819 [2022-03-01 18:07:13,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32626 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=11529, Invalid=68277, Unknown=0, NotChecked=0, Total=79806 [2022-03-01 18:07:13,986 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 1218 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 3424 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 4018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 3424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:13,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1218 Valid, 754 Invalid, 4018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 3424 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-01 18:07:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30819 states. [2022-03-01 18:07:14,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30819 to 15192. [2022-03-01 18:07:14,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15192 states, 15191 states have (on average 2.7192416562438284) internal successors, (41308), 15191 states have internal predecessors, (41308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:14,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15192 states to 15192 states and 41308 transitions. [2022-03-01 18:07:14,330 INFO L78 Accepts]: Start accepts. Automaton has 15192 states and 41308 transitions. Word has length 37 [2022-03-01 18:07:14,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:14,330 INFO L470 AbstractCegarLoop]: Abstraction has 15192 states and 41308 transitions. [2022-03-01 18:07:14,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:14,331 INFO L276 IsEmpty]: Start isEmpty. Operand 15192 states and 41308 transitions. [2022-03-01 18:07:14,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:07:14,350 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:14,350 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:14,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:14,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-01 18:07:14,554 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:07:14,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:14,554 INFO L85 PathProgramCache]: Analyzing trace with hash -2066976134, now seen corresponding path program 25 times [2022-03-01 18:07:14,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:14,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829274620] [2022-03-01 18:07:14,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:14,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:07:14,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:14,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829274620] [2022-03-01 18:07:14,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829274620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:14,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652742245] [2022-03-01 18:07:14,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:07:14,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:14,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:14,736 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:14,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 18:07:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:14,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:07:14,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:15,167 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-01 18:07:15,168 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 38 treesize of output 18 [2022-03-01 18:07:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:15,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:15,663 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:07:15,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-01 18:07:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:16,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652742245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:16,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:16,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-03-01 18:07:16,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674717187] [2022-03-01 18:07:16,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:16,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-01 18:07:16,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:16,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-01 18:07:16,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1620, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:07:16,024 INFO L87 Difference]: Start difference. First operand 15192 states and 41308 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:31,372 INFO L93 Difference]: Finished difference Result 40939 states and 109794 transitions. [2022-03-01 18:07:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2022-03-01 18:07:31,372 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:07:31,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:31,459 INFO L225 Difference]: With dead ends: 40939 [2022-03-01 18:07:31,459 INFO L226 Difference]: Without dead ends: 39453 [2022-03-01 18:07:31,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49162 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=16678, Invalid=95212, Unknown=0, NotChecked=0, Total=111890 [2022-03-01 18:07:31,464 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 1246 mSDsluCounter, 3589 mSDsCounter, 0 mSdLazyCounter, 5130 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 2049 SdHoareTripleChecker+Invalid, 5763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 5130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:31,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1246 Valid, 2049 Invalid, 5763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 5130 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-01 18:07:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39453 states. [2022-03-01 18:07:31,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39453 to 16120. [2022-03-01 18:07:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16120 states, 16119 states have (on average 2.7244866306842854) internal successors, (43916), 16119 states have internal predecessors, (43916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16120 states to 16120 states and 43916 transitions. [2022-03-01 18:07:32,023 INFO L78 Accepts]: Start accepts. Automaton has 16120 states and 43916 transitions. Word has length 37 [2022-03-01 18:07:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:32,023 INFO L470 AbstractCegarLoop]: Abstraction has 16120 states and 43916 transitions. [2022-03-01 18:07:32,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:32,024 INFO L276 IsEmpty]: Start isEmpty. Operand 16120 states and 43916 transitions. [2022-03-01 18:07:32,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:07:32,045 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:32,045 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:32,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:32,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-01 18:07:32,263 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:07:32,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:32,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1940938686, now seen corresponding path program 26 times [2022-03-01 18:07:32,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:32,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450097275] [2022-03-01 18:07:32,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:32,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:32,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:32,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450097275] [2022-03-01 18:07:32,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450097275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:32,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415234251] [2022-03-01 18:07:32,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:07:32,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:32,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:32,468 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:32,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 18:07:32,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:07:32,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:32,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:07:32,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:33,011 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-01 18:07:33,011 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 38 treesize of output 18 [2022-03-01 18:07:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:33,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:33,453 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:07:33,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-01 18:07:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:34,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415234251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:34,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:34,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-01 18:07:34,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705438100] [2022-03-01 18:07:34,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:34,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-01 18:07:34,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:34,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-01 18:07:34,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1775, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:07:34,024 INFO L87 Difference]: Start difference. First operand 16120 states and 43916 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:47,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:47,674 INFO L93 Difference]: Finished difference Result 35540 states and 95539 transitions. [2022-03-01 18:07:47,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-03-01 18:07:47,675 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:07:47,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:47,759 INFO L225 Difference]: With dead ends: 35540 [2022-03-01 18:07:47,760 INFO L226 Difference]: Without dead ends: 34093 [2022-03-01 18:07:47,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36899 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=12408, Invalid=78494, Unknown=0, NotChecked=0, Total=90902 [2022-03-01 18:07:47,765 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 1217 mSDsluCounter, 2491 mSDsCounter, 0 mSdLazyCounter, 4786 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 5268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 4786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:47,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1217 Valid, 1248 Invalid, 5268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 4786 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-01 18:07:47,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34093 states. [2022-03-01 18:07:48,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34093 to 17528. [2022-03-01 18:07:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17528 states, 17527 states have (on average 2.7226564728704283) internal successors, (47720), 17527 states have internal predecessors, (47720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17528 states to 17528 states and 47720 transitions. [2022-03-01 18:07:48,180 INFO L78 Accepts]: Start accepts. Automaton has 17528 states and 47720 transitions. Word has length 37 [2022-03-01 18:07:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:48,180 INFO L470 AbstractCegarLoop]: Abstraction has 17528 states and 47720 transitions. [2022-03-01 18:07:48,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:48,180 INFO L276 IsEmpty]: Start isEmpty. Operand 17528 states and 47720 transitions. [2022-03-01 18:07:48,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:07:48,268 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:48,268 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:48,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:48,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-01 18:07:48,469 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:07:48,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:48,470 INFO L85 PathProgramCache]: Analyzing trace with hash 949570788, now seen corresponding path program 27 times [2022-03-01 18:07:48,470 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:48,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521621045] [2022-03-01 18:07:48,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:48,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:48,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:48,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521621045] [2022-03-01 18:07:48,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521621045] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:48,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977513539] [2022-03-01 18:07:48,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:07:48,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:48,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:48,681 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) [2022-03-01 18:07:48,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 18:07:48,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:07:48,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:48,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 18:07:48,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:49,158 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-01 18:07:49,158 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 38 treesize of output 18 [2022-03-01 18:07:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:49,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:49,599 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:07:49,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 39 treesize of output 103 [2022-03-01 18:07:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:50,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977513539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:50,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:50,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-01 18:07:50,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812118535] [2022-03-01 18:07:50,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:50,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-01 18:07:50,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:50,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-01 18:07:50,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1793, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:07:50,166 INFO L87 Difference]: Start difference. First operand 17528 states and 47720 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:03,073 INFO L93 Difference]: Finished difference Result 36001 states and 97032 transitions. [2022-03-01 18:08:03,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2022-03-01 18:08:03,073 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:08:03,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:03,146 INFO L225 Difference]: With dead ends: 36001 [2022-03-01 18:08:03,146 INFO L226 Difference]: Without dead ends: 35103 [2022-03-01 18:08:03,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28391 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=11364, Invalid=62348, Unknown=0, NotChecked=0, Total=73712 [2022-03-01 18:08:03,150 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 1001 mSDsluCounter, 1891 mSDsCounter, 0 mSdLazyCounter, 4003 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 4510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 4003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:03,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1001 Valid, 875 Invalid, 4510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 4003 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-01 18:08:03,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35103 states. [2022-03-01 18:08:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35103 to 18000. [2022-03-01 18:08:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18000 states, 17999 states have (on average 2.716039779987777) internal successors, (48886), 17999 states have internal predecessors, (48886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:03,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18000 states to 18000 states and 48886 transitions. [2022-03-01 18:08:03,569 INFO L78 Accepts]: Start accepts. Automaton has 18000 states and 48886 transitions. Word has length 37 [2022-03-01 18:08:03,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:03,570 INFO L470 AbstractCegarLoop]: Abstraction has 18000 states and 48886 transitions. [2022-03-01 18:08:03,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:03,570 INFO L276 IsEmpty]: Start isEmpty. Operand 18000 states and 48886 transitions. [2022-03-01 18:08:03,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:08:03,643 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:03,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:03,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-01 18:08:03,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:03,844 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:03,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:03,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1131314986, now seen corresponding path program 28 times [2022-03-01 18:08:03,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:03,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011043488] [2022-03-01 18:08:03,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:03,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:08:04,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:04,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011043488] [2022-03-01 18:08:04,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011043488] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:04,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259272772] [2022-03-01 18:08:04,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:08:04,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:04,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:04,028 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) [2022-03-01 18:08:04,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 18:08:04,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:08:04,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:04,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:08:04,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:04,473 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-01 18:08:04,473 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 38 treesize of output 18 [2022-03-01 18:08:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:04,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:04,884 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:08:04,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-01 18:08:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:05,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259272772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:05,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:05,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-01 18:08:05,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052223994] [2022-03-01 18:08:05,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:05,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-01 18:08:05,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:05,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-01 18:08:05,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:08:05,314 INFO L87 Difference]: Start difference. First operand 18000 states and 48886 transitions. Second operand has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:26,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:26,429 INFO L93 Difference]: Finished difference Result 47599 states and 127744 transitions. [2022-03-01 18:08:26,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 339 states. [2022-03-01 18:08:26,430 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:08:26,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:26,570 INFO L225 Difference]: With dead ends: 47599 [2022-03-01 18:08:26,570 INFO L226 Difference]: Without dead ends: 46244 [2022-03-01 18:08:26,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 378 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62634 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=20490, Invalid=123530, Unknown=0, NotChecked=0, Total=144020 [2022-03-01 18:08:26,577 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1306 mSDsluCounter, 2948 mSDsCounter, 0 mSdLazyCounter, 6007 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1306 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 6623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 6007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:26,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1306 Valid, 1489 Invalid, 6623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 6007 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-01 18:08:26,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46244 states. [2022-03-01 18:08:27,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46244 to 20798. [2022-03-01 18:08:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20798 states, 20797 states have (on average 2.712747030821753) internal successors, (56417), 20797 states have internal predecessors, (56417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:27,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20798 states to 20798 states and 56417 transitions. [2022-03-01 18:08:27,403 INFO L78 Accepts]: Start accepts. Automaton has 20798 states and 56417 transitions. Word has length 37 [2022-03-01 18:08:27,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:27,403 INFO L470 AbstractCegarLoop]: Abstraction has 20798 states and 56417 transitions. [2022-03-01 18:08:27,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:27,403 INFO L276 IsEmpty]: Start isEmpty. Operand 20798 states and 56417 transitions. [2022-03-01 18:08:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:08:27,436 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:27,436 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:27,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:27,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:27,661 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:27,662 INFO L85 PathProgramCache]: Analyzing trace with hash -346656042, now seen corresponding path program 29 times [2022-03-01 18:08:27,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:27,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434938321] [2022-03-01 18:08:27,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:27,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:08:28,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:28,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434938321] [2022-03-01 18:08:28,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434938321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:28,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773391773] [2022-03-01 18:08:28,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:08:28,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:28,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:28,048 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) [2022-03-01 18:08:28,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 18:08:28,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:08:28,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:28,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:08:28,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:28,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:28,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:28,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:28,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:28,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:28,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:28,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-03-01 18:08:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:28,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:29,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:29,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:29,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:29,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:29,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:29,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:29,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:29,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:08:29,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 98 [2022-03-01 18:08:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:29,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773391773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:29,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:29,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-01 18:08:29,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353298228] [2022-03-01 18:08:29,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:29,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-01 18:08:29,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:29,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-01 18:08:29,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1717, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:08:29,782 INFO L87 Difference]: Start difference. First operand 20798 states and 56417 transitions. Second operand has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:49,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:49,869 INFO L93 Difference]: Finished difference Result 54650 states and 147257 transitions. [2022-03-01 18:08:49,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2022-03-01 18:08:49,869 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:08:49,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:50,051 INFO L225 Difference]: With dead ends: 54650 [2022-03-01 18:08:50,051 INFO L226 Difference]: Without dead ends: 53564 [2022-03-01 18:08:50,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 364 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59804 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=19529, Invalid=114061, Unknown=0, NotChecked=0, Total=133590 [2022-03-01 18:08:50,057 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1205 mSDsluCounter, 3190 mSDsCounter, 0 mSdLazyCounter, 4671 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 5926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 4671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 666 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:50,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 1691 Invalid, 5926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 4671 Invalid, 0 Unknown, 666 Unchecked, 2.7s Time] [2022-03-01 18:08:50,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53564 states. [2022-03-01 18:08:50,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53564 to 22756. [2022-03-01 18:08:50,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22756 states, 22755 states have (on average 2.711008569545155) internal successors, (61689), 22755 states have internal predecessors, (61689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:50,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22756 states to 22756 states and 61689 transitions. [2022-03-01 18:08:50,887 INFO L78 Accepts]: Start accepts. Automaton has 22756 states and 61689 transitions. Word has length 37 [2022-03-01 18:08:50,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:50,887 INFO L470 AbstractCegarLoop]: Abstraction has 22756 states and 61689 transitions. [2022-03-01 18:08:50,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:50,887 INFO L276 IsEmpty]: Start isEmpty. Operand 22756 states and 61689 transitions. [2022-03-01 18:08:50,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 18:08:50,922 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:50,922 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:50,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-01 18:08:51,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:51,123 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:51,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:51,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2073145783, now seen corresponding path program 30 times [2022-03-01 18:08:51,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:51,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582782120] [2022-03-01 18:08:51,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:51,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:51,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:51,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582782120] [2022-03-01 18:08:51,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582782120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:51,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678736511] [2022-03-01 18:08:51,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:08:51,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:51,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:51,156 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) [2022-03-01 18:08:51,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 18:08:51,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:08:51,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:51,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 18:08:51,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:51,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:51,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678736511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:51,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:51,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-01 18:08:51,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368800376] [2022-03-01 18:08:51,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:51,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:08:51,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:51,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:08:51,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:08:51,316 INFO L87 Difference]: Start difference. First operand 22756 states and 61689 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 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) [2022-03-01 18:08:51,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:51,463 INFO L93 Difference]: Finished difference Result 30249 states and 82841 transitions. [2022-03-01 18:08:51,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:08:51,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 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 40 [2022-03-01 18:08:51,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:51,528 INFO L225 Difference]: With dead ends: 30249 [2022-03-01 18:08:51,528 INFO L226 Difference]: Without dead ends: 30177 [2022-03-01 18:08:51,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:08:51,529 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 83 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:51,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 110 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:08:51,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30177 states. [2022-03-01 18:08:52,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30177 to 29234. [2022-03-01 18:08:52,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29234 states, 29233 states have (on average 2.7446721171279034) internal successors, (80235), 29233 states have internal predecessors, (80235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:52,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29234 states to 29234 states and 80235 transitions. [2022-03-01 18:08:52,279 INFO L78 Accepts]: Start accepts. Automaton has 29234 states and 80235 transitions. Word has length 40 [2022-03-01 18:08:52,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:52,279 INFO L470 AbstractCegarLoop]: Abstraction has 29234 states and 80235 transitions. [2022-03-01 18:08:52,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 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) [2022-03-01 18:08:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 29234 states and 80235 transitions. [2022-03-01 18:08:52,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-01 18:08:52,329 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:52,330 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:52,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:52,530 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,SelfDestructingSolverStorable32 [2022-03-01 18:08:52,530 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:52,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:52,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1650713771, now seen corresponding path program 31 times [2022-03-01 18:08:52,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:52,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457973442] [2022-03-01 18:08:52,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:52,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:52,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:52,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457973442] [2022-03-01 18:08:52,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457973442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:52,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771437775] [2022-03-01 18:08:52,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:08:52,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:52,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:52,859 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) [2022-03-01 18:08:52,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 18:08:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:52,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:08:52,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:53,575 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-01 18:08:53,575 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 50 treesize of output 22 [2022-03-01 18:08:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:53,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:54,417 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:08:54,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-03-01 18:08:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:56,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771437775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:56,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:56,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-01 18:08:56,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640776666] [2022-03-01 18:08:56,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:56,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-01 18:08:56,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:56,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-01 18:08:56,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2904, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 18:08:56,450 INFO L87 Difference]: Start difference. First operand 29234 states and 80235 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:09:16,367 INFO L93 Difference]: Finished difference Result 44200 states and 117713 transitions. [2022-03-01 18:09:16,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 339 states. [2022-03-01 18:09:16,367 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-01 18:09:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:09:16,451 INFO L225 Difference]: With dead ends: 44200 [2022-03-01 18:09:16,451 INFO L226 Difference]: Without dead ends: 42253 [2022-03-01 18:09:16,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 391 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64716 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=21746, Invalid=132310, Unknown=0, NotChecked=0, Total=154056 [2022-03-01 18:09:16,460 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 2342 mSDsluCounter, 4675 mSDsCounter, 0 mSdLazyCounter, 8694 mSolverCounterSat, 893 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2342 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 9587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 893 IncrementalHoareTripleChecker+Valid, 8694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:09:16,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2342 Valid, 2391 Invalid, 9587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [893 Valid, 8694 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-03-01 18:09:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42253 states. [2022-03-01 18:09:17,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42253 to 30116. [2022-03-01 18:09:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30116 states, 30115 states have (on average 2.74394819857214) internal successors, (82634), 30115 states have internal predecessors, (82634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:17,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30116 states to 30116 states and 82634 transitions. [2022-03-01 18:09:17,108 INFO L78 Accepts]: Start accepts. Automaton has 30116 states and 82634 transitions. Word has length 43 [2022-03-01 18:09:17,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:09:17,108 INFO L470 AbstractCegarLoop]: Abstraction has 30116 states and 82634 transitions. [2022-03-01 18:09:17,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:17,108 INFO L276 IsEmpty]: Start isEmpty. Operand 30116 states and 82634 transitions. [2022-03-01 18:09:17,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-01 18:09:17,152 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:09:17,152 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:09:17,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-01 18:09:17,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:17,352 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:09:17,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:09:17,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1112247061, now seen corresponding path program 32 times [2022-03-01 18:09:17,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:09:17,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643464960] [2022-03-01 18:09:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:09:17,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:09:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:09:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:17,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:09:17,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643464960] [2022-03-01 18:09:17,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643464960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:09:17,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718250460] [2022-03-01 18:09:17,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:09:17,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:17,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:09:17,665 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) [2022-03-01 18:09:17,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 18:09:17,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:09:17,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:09:17,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:09:17,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:09:18,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:18,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:18,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:18,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:18,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:18,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:18,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:18,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:18,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:18,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2022-03-01 18:09:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:18,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:09:19,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:19,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:19,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:19,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:19,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:19,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:19,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:19,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:19,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:19,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:19,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:19,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:19,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:19,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:19,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:19,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:09:19,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 49 treesize of output 153 [2022-03-01 18:09:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:20,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718250460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:09:20,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:09:20,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-01 18:09:20,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132608566] [2022-03-01 18:09:20,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:09:20,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-01 18:09:20,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:09:20,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-01 18:09:20,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=2802, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 18:09:20,509 INFO L87 Difference]: Start difference. First operand 30116 states and 82634 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:34,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:09:34,681 INFO L93 Difference]: Finished difference Result 42109 states and 115194 transitions. [2022-03-01 18:09:34,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2022-03-01 18:09:34,681 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-01 18:09:34,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:09:34,763 INFO L225 Difference]: With dead ends: 42109 [2022-03-01 18:09:34,763 INFO L226 Difference]: Without dead ends: 42066 [2022-03-01 18:09:34,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 96 SyntacticMatches, 28 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30717 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=9279, Invalid=60153, Unknown=0, NotChecked=0, Total=69432 [2022-03-01 18:09:34,766 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 633 mSDsluCounter, 2958 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 5953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4978 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:09:34,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 1035 Invalid, 5953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 897 Invalid, 0 Unknown, 4978 Unchecked, 0.4s Time] [2022-03-01 18:09:34,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42066 states. [2022-03-01 18:09:35,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42066 to 30630. [2022-03-01 18:09:35,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30630 states, 30629 states have (on average 2.743151914851938) internal successors, (84020), 30629 states have internal predecessors, (84020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30630 states to 30630 states and 84020 transitions. [2022-03-01 18:09:35,470 INFO L78 Accepts]: Start accepts. Automaton has 30630 states and 84020 transitions. Word has length 43 [2022-03-01 18:09:35,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:09:35,470 INFO L470 AbstractCegarLoop]: Abstraction has 30630 states and 84020 transitions. [2022-03-01 18:09:35,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:35,470 INFO L276 IsEmpty]: Start isEmpty. Operand 30630 states and 84020 transitions. [2022-03-01 18:09:35,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-01 18:09:35,513 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:09:35,513 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:09:35,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-01 18:09:35,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:35,714 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:09:35,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:09:35,714 INFO L85 PathProgramCache]: Analyzing trace with hash -129342371, now seen corresponding path program 33 times [2022-03-01 18:09:35,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:09:35,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341844889] [2022-03-01 18:09:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:09:35,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:09:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:09:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:36,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:09:36,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341844889] [2022-03-01 18:09:36,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341844889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:09:36,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040759623] [2022-03-01 18:09:36,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:09:36,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:36,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:09:36,062 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) [2022-03-01 18:09:36,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 18:09:36,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:09:36,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:09:36,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-01 18:09:36,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:09:36,793 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-01 18:09:36,793 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 50 treesize of output 22 [2022-03-01 18:09:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:36,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:09:37,531 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:09:37,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 52 treesize of output 176 [2022-03-01 18:09:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:39,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040759623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:09:39,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:09:39,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-01 18:09:39,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615199050] [2022-03-01 18:09:39,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:09:39,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-01 18:09:39,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:09:39,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-01 18:09:39,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2914, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 18:09:39,475 INFO L87 Difference]: Start difference. First operand 30630 states and 84020 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:21,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:21,058 INFO L93 Difference]: Finished difference Result 55936 states and 147102 transitions. [2022-03-01 18:10:21,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 596 states. [2022-03-01 18:10:21,058 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-01 18:10:21,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:21,202 INFO L225 Difference]: With dead ends: 55936 [2022-03-01 18:10:21,202 INFO L226 Difference]: Without dead ends: 53473 [2022-03-01 18:10:21,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 648 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189462 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=52090, Invalid=369760, Unknown=0, NotChecked=0, Total=421850 [2022-03-01 18:10:21,218 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1682 mSDsluCounter, 6005 mSDsCounter, 0 mSdLazyCounter, 12509 mSolverCounterSat, 924 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 2727 SdHoareTripleChecker+Invalid, 13433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 924 IncrementalHoareTripleChecker+Valid, 12509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:21,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1682 Valid, 2727 Invalid, 13433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [924 Valid, 12509 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-03-01 18:10:21,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53473 states. [2022-03-01 18:10:22,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53473 to 30690. [2022-03-01 18:10:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30690 states, 30689 states have (on average 2.7449248916549904) internal successors, (84239), 30689 states have internal predecessors, (84239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:22,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30690 states to 30690 states and 84239 transitions. [2022-03-01 18:10:22,099 INFO L78 Accepts]: Start accepts. Automaton has 30690 states and 84239 transitions. Word has length 43 [2022-03-01 18:10:22,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:22,100 INFO L470 AbstractCegarLoop]: Abstraction has 30690 states and 84239 transitions. [2022-03-01 18:10:22,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand 30690 states and 84239 transitions. [2022-03-01 18:10:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-01 18:10:22,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:22,145 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:22,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-01 18:10:22,345 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,SelfDestructingSolverStorable35 [2022-03-01 18:10:22,345 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:10:22,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:22,346 INFO L85 PathProgramCache]: Analyzing trace with hash -2103614959, now seen corresponding path program 34 times [2022-03-01 18:10:22,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:22,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146979948] [2022-03-01 18:10:22,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:22,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:22,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:22,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146979948] [2022-03-01 18:10:22,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146979948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:22,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959919414] [2022-03-01 18:10:22,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:10:22,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:22,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:22,767 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) [2022-03-01 18:10:22,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 18:10:22,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:10:22,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:22,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:10:22,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:23,481 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-01 18:10:23,481 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 50 treesize of output 22 [2022-03-01 18:10:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:23,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:24,222 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:10:24,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-03-01 18:10:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:26,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959919414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:26,012 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:26,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-01 18:10:26,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229634482] [2022-03-01 18:10:26,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:26,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-01 18:10:26,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:26,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-01 18:10:26,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=2922, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 18:10:26,013 INFO L87 Difference]: Start difference. First operand 30690 states and 84239 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:13,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:11:13,125 INFO L93 Difference]: Finished difference Result 58865 states and 154985 transitions. [2022-03-01 18:11:13,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 628 states. [2022-03-01 18:11:13,125 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-01 18:11:13,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:11:13,331 INFO L225 Difference]: With dead ends: 58865 [2022-03-01 18:11:13,331 INFO L226 Difference]: Without dead ends: 56451 [2022-03-01 18:11:13,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 680 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210674 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=53546, Invalid=410896, Unknown=0, NotChecked=0, Total=464442 [2022-03-01 18:11:13,364 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1732 mSDsluCounter, 5833 mSDsCounter, 0 mSdLazyCounter, 11059 mSolverCounterSat, 1021 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1732 SdHoareTripleChecker+Valid, 2854 SdHoareTripleChecker+Invalid, 12080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1021 IncrementalHoareTripleChecker+Valid, 11059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:11:13,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1732 Valid, 2854 Invalid, 12080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1021 Valid, 11059 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-03-01 18:11:13,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56451 states. [2022-03-01 18:11:14,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56451 to 31926. [2022-03-01 18:11:14,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31926 states, 31925 states have (on average 2.74894283476899) internal successors, (87760), 31925 states have internal predecessors, (87760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:14,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31926 states to 31926 states and 87760 transitions. [2022-03-01 18:11:14,638 INFO L78 Accepts]: Start accepts. Automaton has 31926 states and 87760 transitions. Word has length 43 [2022-03-01 18:11:14,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:11:14,638 INFO L470 AbstractCegarLoop]: Abstraction has 31926 states and 87760 transitions. [2022-03-01 18:11:14,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:14,638 INFO L276 IsEmpty]: Start isEmpty. Operand 31926 states and 87760 transitions. [2022-03-01 18:11:14,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-01 18:11:14,709 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:11:14,709 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:11:14,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-01 18:11:14,909 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,SelfDestructingSolverStorable36 [2022-03-01 18:11:14,910 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:11:14,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:11:14,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1987652953, now seen corresponding path program 35 times [2022-03-01 18:11:14,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:11:14,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737255230] [2022-03-01 18:11:14,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:11:14,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:11:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:11:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:15,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:11:15,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737255230] [2022-03-01 18:11:15,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737255230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:11:15,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223906120] [2022-03-01 18:11:15,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:11:15,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:15,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:11:15,289 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) [2022-03-01 18:11:15,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 18:11:15,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:11:15,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:11:15,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:11:15,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:11:16,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:16,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:16,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:16,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:16,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:16,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:16,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:16,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:16,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:16,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:16,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:16,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:16,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:16,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:16,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:16,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:16,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 22 [2022-03-01 18:11:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:16,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:11:17,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:17,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:17,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:17,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:17,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:17,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:17,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:17,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:17,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:17,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:17,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:17,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:17,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:17,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:17,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:17,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:17,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:17,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:18,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:11:18,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 129 [2022-03-01 18:11:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:18,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223906120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:11:18,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:11:18,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-01 18:11:18,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610222496] [2022-03-01 18:11:18,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:11:18,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-01 18:11:18,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:11:18,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-01 18:11:18,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 18:11:18,742 INFO L87 Difference]: Start difference. First operand 31926 states and 87760 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:08,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:12:08,113 INFO L93 Difference]: Finished difference Result 109906 states and 296717 transitions. [2022-03-01 18:12:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 575 states. [2022-03-01 18:12:08,113 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-01 18:12:08,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:12:08,542 INFO L225 Difference]: With dead ends: 109906 [2022-03-01 18:12:08,542 INFO L226 Difference]: Without dead ends: 108076 [2022-03-01 18:12:08,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 149 SyntacticMatches, 54 SemanticMatches, 616 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 194353 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=50892, Invalid=330414, Unknown=0, NotChecked=0, Total=381306 [2022-03-01 18:12:08,561 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1729 mSDsluCounter, 9182 mSDsCounter, 0 mSdLazyCounter, 6348 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1729 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 24523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 6348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17424 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:12:08,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1729 Valid, 2953 Invalid, 24523 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [751 Valid, 6348 Invalid, 0 Unknown, 17424 Unchecked, 3.4s Time] [2022-03-01 18:12:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108076 states. [2022-03-01 18:12:10,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108076 to 39267. [2022-03-01 18:12:10,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39267 states, 39266 states have (on average 2.752355727601487) internal successors, (108074), 39266 states have internal predecessors, (108074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:10,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39267 states to 39267 states and 108074 transitions. [2022-03-01 18:12:10,639 INFO L78 Accepts]: Start accepts. Automaton has 39267 states and 108074 transitions. Word has length 43 [2022-03-01 18:12:10,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:12:10,639 INFO L470 AbstractCegarLoop]: Abstraction has 39267 states and 108074 transitions. [2022-03-01 18:12:10,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:10,639 INFO L276 IsEmpty]: Start isEmpty. Operand 39267 states and 108074 transitions. [2022-03-01 18:12:10,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-01 18:12:10,722 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:12:10,722 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:12:10,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-01 18:12:10,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-01 18:12:10,923 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:12:10,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:12:10,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1298369877, now seen corresponding path program 36 times [2022-03-01 18:12:10,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:12:10,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136164218] [2022-03-01 18:12:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:12:10,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:12:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:11,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:12:11,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136164218] [2022-03-01 18:12:11,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136164218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:12:11,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345700839] [2022-03-01 18:12:11,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:12:11,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:11,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:12:11,568 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) [2022-03-01 18:12:11,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 18:12:11,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:12:11,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:12:11,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:12:11,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:12:12,281 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-01 18:12:12,281 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 50 treesize of output 22 [2022-03-01 18:12:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:12,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:12:12,979 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:12:12,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-03-01 18:12:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:15,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345700839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:12:15,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:12:15,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-01 18:12:15,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377936248] [2022-03-01 18:12:15,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:12:15,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-01 18:12:15,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:12:15,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-01 18:12:15,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=2915, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 18:12:15,211 INFO L87 Difference]: Start difference. First operand 39267 states and 108074 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:00,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:13:00,086 INFO L93 Difference]: Finished difference Result 77276 states and 205583 transitions. [2022-03-01 18:13:00,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 609 states. [2022-03-01 18:13:00,086 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-01 18:13:00,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:00,264 INFO L225 Difference]: With dead ends: 77276 [2022-03-01 18:13:00,265 INFO L226 Difference]: Without dead ends: 73306 [2022-03-01 18:13:00,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 661 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204061 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=56273, Invalid=382633, Unknown=0, NotChecked=0, Total=438906 [2022-03-01 18:13:00,282 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 2233 mSDsluCounter, 5723 mSDsCounter, 0 mSdLazyCounter, 11275 mSolverCounterSat, 1093 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2233 SdHoareTripleChecker+Valid, 2675 SdHoareTripleChecker+Invalid, 12368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1093 IncrementalHoareTripleChecker+Valid, 11275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:00,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2233 Valid, 2675 Invalid, 12368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1093 Valid, 11275 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-03-01 18:13:00,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73306 states. [2022-03-01 18:13:01,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73306 to 39944. [2022-03-01 18:13:01,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39944 states, 39943 states have (on average 2.7510202037904015) internal successors, (109884), 39943 states have internal predecessors, (109884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39944 states to 39944 states and 109884 transitions. [2022-03-01 18:13:01,387 INFO L78 Accepts]: Start accepts. Automaton has 39944 states and 109884 transitions. Word has length 43 [2022-03-01 18:13:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:13:01,387 INFO L470 AbstractCegarLoop]: Abstraction has 39944 states and 109884 transitions. [2022-03-01 18:13:01,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:01,388 INFO L276 IsEmpty]: Start isEmpty. Operand 39944 states and 109884 transitions. [2022-03-01 18:13:01,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-01 18:13:01,445 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:01,445 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:13:01,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-01 18:13:01,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-01 18:13:01,646 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:13:01,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:01,646 INFO L85 PathProgramCache]: Analyzing trace with hash -347552145, now seen corresponding path program 37 times [2022-03-01 18:13:01,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:01,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113000236] [2022-03-01 18:13:01,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:01,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:01,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:13:01,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113000236] [2022-03-01 18:13:01,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113000236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:13:01,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639483565] [2022-03-01 18:13:01,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:13:01,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:01,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:13:01,982 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) [2022-03-01 18:13:01,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 18:13:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:02,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:13:02,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:13:03,313 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-01 18:13:03,313 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 50 treesize of output 22 [2022-03-01 18:13:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:03,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:13:04,213 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:13:04,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-03-01 18:13:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:05,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639483565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:13:05,716 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:13:05,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-01 18:13:05,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16179807] [2022-03-01 18:13:05,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:13:05,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-01 18:13:05,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:13:05,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-01 18:13:05,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2924, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 18:13:05,718 INFO L87 Difference]: Start difference. First operand 39944 states and 109884 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-03-01 18:13:47,664 WARN L244 SmtUtils]: Removed 4 from assertion stack [2022-03-01 18:13:47,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 551 states. [2022-03-01 18:13:47,674 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:13:47,674 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:13:47,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 603 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165515 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=43475, Invalid=321945, Unknown=0, NotChecked=0, Total=365420 [2022-03-01 18:13:47,687 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 1942 mSDsluCounter, 3139 mSDsCounter, 0 mSdLazyCounter, 8405 mSolverCounterSat, 1040 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1942 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 9445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1040 IncrementalHoareTripleChecker+Valid, 8405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:47,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1942 Valid, 865 Invalid, 9445 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1040 Valid, 8405 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-03-01 18:13:47,689 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-01 18:13:47,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-01 18:13:47,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-01 18:13:47,890 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (39944states) and FLOYD_HOARE automaton (currently 551 states, 58 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 52 for 16ms.. [2022-03-01 18:13:47,892 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-01 18:13:47,892 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-01 18:13:47,892 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-01 18:13:47,896 INFO L732 BasicCegarLoop]: Path program histogram: [37, 2, 1] [2022-03-01 18:13:47,898 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 18:13:47,898 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 18:13:47,901 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 06:13:47 BasicIcfg [2022-03-01 18:13:47,901 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 18:13:47,901 INFO L158 Benchmark]: Toolchain (without parser) took 740846.16ms. Allocated memory was 203.4MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 164.4MB in the beginning and 1.1GB in the end (delta: -900.6MB). Peak memory consumption was 513.2MB. Max. memory is 8.0GB. [2022-03-01 18:13:47,901 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.15ms. Allocated memory is still 203.4MB. Free memory is still 165.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:13:47,902 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.54ms. Allocated memory is still 203.4MB. Free memory was 164.3MB in the beginning and 162.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:13:47,902 INFO L158 Benchmark]: Boogie Preprocessor took 11.04ms. Allocated memory is still 203.4MB. Free memory was 162.8MB in the beginning and 161.9MB in the end (delta: 938.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:13:47,902 INFO L158 Benchmark]: RCFGBuilder took 168.28ms. Allocated memory is still 203.4MB. Free memory was 161.8MB in the beginning and 152.7MB in the end (delta: 9.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-01 18:13:47,902 INFO L158 Benchmark]: TraceAbstraction took 740635.47ms. Allocated memory was 203.4MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 152.2MB in the beginning and 1.1GB in the end (delta: -912.9MB). Peak memory consumption was 500.6MB. Max. memory is 8.0GB. [2022-03-01 18:13:47,902 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.15ms. Allocated memory is still 203.4MB. Free memory is still 165.5MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.54ms. Allocated memory is still 203.4MB. Free memory was 164.3MB in the beginning and 162.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.04ms. Allocated memory is still 203.4MB. Free memory was 162.8MB in the beginning and 161.9MB in the end (delta: 938.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 168.28ms. Allocated memory is still 203.4MB. Free memory was 161.8MB in the beginning and 152.7MB in the end (delta: 9.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 740635.47ms. Allocated memory was 203.4MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 152.2MB in the beginning and 1.1GB in the end (delta: -912.9MB). Peak memory consumption was 500.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (39944states) and FLOYD_HOARE automaton (currently 551 states, 58 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 52 for 16ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (39944states) and FLOYD_HOARE automaton (currently 551 states, 58 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 52 for 16ms.. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (39944states) and FLOYD_HOARE automaton (currently 551 states, 58 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 52 for 16ms.. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (39944states) and FLOYD_HOARE automaton (currently 551 states, 58 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 52 for 16ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 740.5s, OverallIterations: 40, TraceHistogramMax: 4, PathProgramHistogramMax: 37, EmptinessCheckTime: 0.8s, AutomataDifference: 647.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 45069 SdHoareTripleChecker+Valid, 88.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 45069 mSDsluCounter, 50392 SdHoareTripleChecker+Invalid, 75.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 25744 IncrementalHoareTripleChecker+Unchecked, 105053 mSDsCounter, 21562 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 173882 IncrementalHoareTripleChecker+Invalid, 221188 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21562 mSolverCounterUnsat, 2527 mSDtfsCounter, 173882 mSolverCounterSat, 0.8s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14053 GetRequests, 1978 SyntacticMatches, 115 SemanticMatches, 11959 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2277189 ImplicationChecksByTransitivity, 551.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39944occurred in iteration=39, InterpolantAutomatonStates: 10137, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 14.5s AutomataMinimizationTime, 39 MinimizatonAttempts, 492652 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 67.8s InterpolantComputationTime, 2768 NumberOfCodeBlocks, 2768 NumberOfCodeBlocksAsserted, 141 NumberOfCheckSat, 4008 ConstructedInterpolants, 101 QuantifiedInterpolants, 54679 SizeOfPredicates, 447 NumberOfNonLiveVariables, 3290 ConjunctsInSsa, 899 ConjunctsInUnsatCore, 114 InterpolantComputations, 3 PerfectInterpolantSequences, 268/2722 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown