/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/mult-flipped-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.abstract-por-f0ea240 [2022-02-11 00:05:05,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-11 00:05:05,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-11 00:05:05,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-11 00:05:05,874 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-02-11 00:05:05,904 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-11 00:05:05,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-11 00:05:05,905 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-11 00:05:05,905 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-11 00:05:05,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-11 00:05:05,906 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-11 00:05:05,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-11 00:05:05,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-11 00:05:05,907 INFO L138 SettingsManager]: * Use SBE=true [2022-02-11 00:05:05,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-11 00:05:05,908 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-11 00:05:05,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-11 00:05:05,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-11 00:05:05,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-11 00:05:05,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-11 00:05:05,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-11 00:05:05,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-11 00:05:05,909 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-11 00:05:05,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-11 00:05:05,909 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-11 00:05:05,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-11 00:05:05,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-11 00:05:05,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-11 00:05:05,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-11 00:05:05,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-11 00:05:05,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 00:05:05,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-11 00:05:05,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-11 00:05:05,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-11 00:05:05,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-11 00:05:05,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-11 00:05:05,910 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-11 00:05:05,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-11 00:05:05,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-11 00:05:06,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-11 00:05:06,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-11 00:05:06,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-11 00:05:06,154 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-11 00:05:06,155 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-11 00:05:06,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl [2022-02-11 00:05:06,157 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl' [2022-02-11 00:05:06,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-11 00:05:06,187 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-11 00:05:06,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-11 00:05:06,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-11 00:05:06,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-11 00:05:06,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:05:06" (1/1) ... [2022-02-11 00:05:06,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:05:06" (1/1) ... [2022-02-11 00:05:06,212 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-11 00:05:06,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-11 00:05:06,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-11 00:05:06,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-11 00:05:06,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-11 00:05:06,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:05:06" (1/1) ... [2022-02-11 00:05:06,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:05:06" (1/1) ... [2022-02-11 00:05:06,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:05:06" (1/1) ... [2022-02-11 00:05:06,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:05:06" (1/1) ... [2022-02-11 00:05:06,228 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:05:06" (1/1) ... [2022-02-11 00:05:06,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:05:06" (1/1) ... [2022-02-11 00:05:06,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:05:06" (1/1) ... [2022-02-11 00:05:06,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-11 00:05:06,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-11 00:05:06,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-11 00:05:06,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-11 00:05:06,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:05:06" (1/1) ... [2022-02-11 00:05:06,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 00:05:06,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:06,269 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-11 00:05:06,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-11 00:05:06,316 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-11 00:05:06,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-11 00:05:06,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-11 00:05:06,318 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-11 00:05:06,318 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-11 00:05:06,318 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-11 00:05:06,318 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-11 00:05:06,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-11 00:05:06,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-11 00:05:06,319 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-11 00:05:06,319 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-11 00:05:06,319 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-11 00:05:06,320 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-11 00:05:06,363 INFO L234 CfgBuilder]: Building ICFG [2022-02-11 00:05:06,365 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-11 00:05:06,488 INFO L275 CfgBuilder]: Performing block encoding [2022-02-11 00:05:06,503 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-11 00:05:06,504 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-11 00:05:06,505 INFO L202 PluginConnector]: Adding new model mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 12:05:06 BoogieIcfgContainer [2022-02-11 00:05:06,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-11 00:05:06,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-11 00:05:06,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-11 00:05:06,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-11 00:05:06,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:05:06" (1/2) ... [2022-02-11 00:05:06,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a440096 and model type mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 12:05:06, skipping insertion in model container [2022-02-11 00:05:06,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 12:05:06" (2/2) ... [2022-02-11 00:05:06,517 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.bpl [2022-02-11 00:05:06,526 WARN L154 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-11 00:05:06,526 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-11 00:05:06,527 INFO L168 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-11 00:05:06,527 INFO L538 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-11 00:05:06,586 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-11 00:05:06,652 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-11 00:05:06,658 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-11 00:05:06,658 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-11 00:05:06,665 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2022-02-11 00:05:06,706 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:06,709 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:06,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:05:06,716 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:06,716 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:06,717 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:06,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:06,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1698271758, now seen corresponding path program 1 times [2022-02-11 00:05:06,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:06,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849909061] [2022-02-11 00:05:06,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:06,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:06,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:06,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849909061] [2022-02-11 00:05:06,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849909061] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:05:06,917 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:05:06,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-11 00:05:06,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694668814] [2022-02-11 00:05:06,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:05:06,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 00:05:06,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:06,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 00:05:06,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 00:05:06,964 INFO L87 Difference]: Start difference. First operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:07,061 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2022-02-11 00:05:07,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 00:05:07,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:05:07,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:07,107 INFO L225 Difference]: With dead ends: 214 [2022-02-11 00:05:07,107 INFO L226 Difference]: Without dead ends: 199 [2022-02-11 00:05:07,109 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 00:05:07,113 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:07,114 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:07,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-02-11 00:05:07,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2022-02-11 00:05:07,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2022-02-11 00:05:07,186 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2022-02-11 00:05:07,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:07,190 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2022-02-11 00:05:07,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:07,191 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2022-02-11 00:05:07,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:05:07,196 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:07,196 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:07,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-11 00:05:07,197 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:07,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:07,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1717700848, now seen corresponding path program 1 times [2022-02-11 00:05:07,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:07,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471059905] [2022-02-11 00:05:07,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:07,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:07,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:07,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471059905] [2022-02-11 00:05:07,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471059905] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:07,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317525018] [2022-02-11 00:05:07,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:07,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:07,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:07,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:07,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-11 00:05:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:07,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-11 00:05:07,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:07,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:07,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317525018] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:07,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:07,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-02-11 00:05:07,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948918115] [2022-02-11 00:05:07,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:07,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:05:07,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:07,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:05:07,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:05:07,549 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2022-02-11 00:05:07,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:07,665 INFO L93 Difference]: Finished difference Result 344 states and 959 transitions. [2022-02-11 00:05:07,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 00:05:07,665 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 17 [2022-02-11 00:05:07,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:07,669 INFO L225 Difference]: With dead ends: 344 [2022-02-11 00:05:07,669 INFO L226 Difference]: Without dead ends: 344 [2022-02-11 00:05:07,669 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:05:07,670 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:07,671 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:07,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-02-11 00:05:07,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 172. [2022-02-11 00:05:07,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.953216374269006) internal successors, (505), 171 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:07,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 505 transitions. [2022-02-11 00:05:07,704 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 505 transitions. Word has length 17 [2022-02-11 00:05:07,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:07,705 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 505 transitions. [2022-02-11 00:05:07,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2022-02-11 00:05:07,705 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 505 transitions. [2022-02-11 00:05:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:05:07,709 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:07,709 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:07,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:07,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:07,928 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:07,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:07,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1520327342, now seen corresponding path program 1 times [2022-02-11 00:05:07,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:07,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114951328] [2022-02-11 00:05:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:07,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:07,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:07,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114951328] [2022-02-11 00:05:07,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114951328] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:05:07,966 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:05:07,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 00:05:07,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438300490] [2022-02-11 00:05:07,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:05:07,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:05:07,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:07,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:05:07,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:05:07,970 INFO L87 Difference]: Start difference. First operand 172 states and 505 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:08,043 INFO L93 Difference]: Finished difference Result 237 states and 639 transitions. [2022-02-11 00:05:08,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:05:08,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:05:08,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:08,045 INFO L225 Difference]: With dead ends: 237 [2022-02-11 00:05:08,046 INFO L226 Difference]: Without dead ends: 227 [2022-02-11 00:05:08,046 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:05:08,047 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 43 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:08,047 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 20 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:08,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-02-11 00:05:08,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 186. [2022-02-11 00:05:08,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.843243243243243) internal successors, (526), 185 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 526 transitions. [2022-02-11 00:05:08,061 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 526 transitions. Word has length 17 [2022-02-11 00:05:08,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:08,061 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 526 transitions. [2022-02-11 00:05:08,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,061 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 526 transitions. [2022-02-11 00:05:08,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:05:08,062 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:08,062 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:08,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-11 00:05:08,063 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:08,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:08,063 INFO L85 PathProgramCache]: Analyzing trace with hash 388922220, now seen corresponding path program 1 times [2022-02-11 00:05:08,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:08,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951437325] [2022-02-11 00:05:08,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:08,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:08,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:08,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951437325] [2022-02-11 00:05:08,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951437325] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:05:08,092 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:05:08,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 00:05:08,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491601076] [2022-02-11 00:05:08,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:05:08,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:05:08,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:08,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:05:08,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:05:08,094 INFO L87 Difference]: Start difference. First operand 186 states and 526 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:08,161 INFO L93 Difference]: Finished difference Result 317 states and 868 transitions. [2022-02-11 00:05:08,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:05:08,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:05:08,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:08,167 INFO L225 Difference]: With dead ends: 317 [2022-02-11 00:05:08,167 INFO L226 Difference]: Without dead ends: 302 [2022-02-11 00:05:08,168 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:05:08,172 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:08,173 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 20 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:08,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-11 00:05:08,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 231. [2022-02-11 00:05:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.8869565217391306) internal successors, (664), 230 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 664 transitions. [2022-02-11 00:05:08,191 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 664 transitions. Word has length 17 [2022-02-11 00:05:08,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:08,191 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 664 transitions. [2022-02-11 00:05:08,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,192 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 664 transitions. [2022-02-11 00:05:08,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:05:08,193 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:08,193 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:08,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-11 00:05:08,193 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:08,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:08,194 INFO L85 PathProgramCache]: Analyzing trace with hash -367822358, now seen corresponding path program 2 times [2022-02-11 00:05:08,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:08,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944375348] [2022-02-11 00:05:08,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:08,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:08,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:08,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944375348] [2022-02-11 00:05:08,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944375348] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:05:08,237 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:05:08,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 00:05:08,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096683040] [2022-02-11 00:05:08,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:05:08,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:05:08,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:08,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:05:08,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:05:08,238 INFO L87 Difference]: Start difference. First operand 231 states and 664 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:08,278 INFO L93 Difference]: Finished difference Result 274 states and 779 transitions. [2022-02-11 00:05:08,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 00:05:08,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:05:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:08,281 INFO L225 Difference]: With dead ends: 274 [2022-02-11 00:05:08,281 INFO L226 Difference]: Without dead ends: 274 [2022-02-11 00:05:08,281 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:05:08,283 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:08,284 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 21 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:05:08,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-02-11 00:05:08,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 243. [2022-02-11 00:05:08,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.8925619834710745) internal successors, (700), 242 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 700 transitions. [2022-02-11 00:05:08,297 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 700 transitions. Word has length 17 [2022-02-11 00:05:08,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:08,298 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 700 transitions. [2022-02-11 00:05:08,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,298 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 700 transitions. [2022-02-11 00:05:08,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:05:08,299 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:08,301 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:08,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-11 00:05:08,305 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:08,307 INFO L85 PathProgramCache]: Analyzing trace with hash -320771866, now seen corresponding path program 3 times [2022-02-11 00:05:08,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:08,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003773802] [2022-02-11 00:05:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:08,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:08,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:08,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003773802] [2022-02-11 00:05:08,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003773802] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:05:08,389 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:05:08,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 00:05:08,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063346968] [2022-02-11 00:05:08,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:05:08,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:05:08,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:08,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:05:08,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:05:08,390 INFO L87 Difference]: Start difference. First operand 243 states and 700 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:08,449 INFO L93 Difference]: Finished difference Result 296 states and 805 transitions. [2022-02-11 00:05:08,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:05:08,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:05:08,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:08,451 INFO L225 Difference]: With dead ends: 296 [2022-02-11 00:05:08,451 INFO L226 Difference]: Without dead ends: 282 [2022-02-11 00:05:08,451 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:05:08,453 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:08,454 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 27 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:08,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-02-11 00:05:08,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 229. [2022-02-11 00:05:08,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.8421052631578947) internal successors, (648), 228 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 648 transitions. [2022-02-11 00:05:08,462 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 648 transitions. Word has length 17 [2022-02-11 00:05:08,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:08,462 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 648 transitions. [2022-02-11 00:05:08,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,462 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 648 transitions. [2022-02-11 00:05:08,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:05:08,463 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:08,464 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:08,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-11 00:05:08,464 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:08,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:08,466 INFO L85 PathProgramCache]: Analyzing trace with hash 830951980, now seen corresponding path program 2 times [2022-02-11 00:05:08,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:08,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370670867] [2022-02-11 00:05:08,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:08,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:08,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:08,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370670867] [2022-02-11 00:05:08,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370670867] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:05:08,514 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:05:08,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 00:05:08,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124045417] [2022-02-11 00:05:08,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:05:08,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:05:08,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:08,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:05:08,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:05:08,515 INFO L87 Difference]: Start difference. First operand 229 states and 648 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:08,586 INFO L93 Difference]: Finished difference Result 236 states and 661 transitions. [2022-02-11 00:05:08,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:05:08,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:05:08,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:08,588 INFO L225 Difference]: With dead ends: 236 [2022-02-11 00:05:08,588 INFO L226 Difference]: Without dead ends: 221 [2022-02-11 00:05:08,588 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:05:08,589 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:08,590 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 20 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:08,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-02-11 00:05:08,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 212. [2022-02-11 00:05:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.876777251184834) internal successors, (607), 211 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 607 transitions. [2022-02-11 00:05:08,597 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 607 transitions. Word has length 17 [2022-02-11 00:05:08,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:08,597 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 607 transitions. [2022-02-11 00:05:08,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,597 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 607 transitions. [2022-02-11 00:05:08,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:05:08,598 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:08,598 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:08,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-11 00:05:08,599 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:08,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:08,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1480901912, now seen corresponding path program 3 times [2022-02-11 00:05:08,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:08,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614701294] [2022-02-11 00:05:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:08,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:08,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:08,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614701294] [2022-02-11 00:05:08,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614701294] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:05:08,661 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:05:08,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 00:05:08,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066637683] [2022-02-11 00:05:08,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:05:08,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:05:08,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:08,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:05:08,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:05:08,662 INFO L87 Difference]: Start difference. First operand 212 states and 607 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:08,693 INFO L93 Difference]: Finished difference Result 225 states and 655 transitions. [2022-02-11 00:05:08,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 00:05:08,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:05:08,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:08,695 INFO L225 Difference]: With dead ends: 225 [2022-02-11 00:05:08,695 INFO L226 Difference]: Without dead ends: 225 [2022-02-11 00:05:08,695 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:05:08,696 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:08,696 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:05:08,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-02-11 00:05:08,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 214. [2022-02-11 00:05:08,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.92018779342723) internal successors, (622), 213 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 622 transitions. [2022-02-11 00:05:08,703 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 622 transitions. Word has length 17 [2022-02-11 00:05:08,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:08,706 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 622 transitions. [2022-02-11 00:05:08,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,708 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 622 transitions. [2022-02-11 00:05:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:05:08,708 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:08,709 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:08,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-11 00:05:08,709 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:08,709 INFO L85 PathProgramCache]: Analyzing trace with hash -947012380, now seen corresponding path program 4 times [2022-02-11 00:05:08,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:08,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860895821] [2022-02-11 00:05:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:08,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:08,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:08,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860895821] [2022-02-11 00:05:08,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860895821] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:05:08,751 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:05:08,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 00:05:08,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712819882] [2022-02-11 00:05:08,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:05:08,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:05:08,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:08,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:05:08,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:05:08,752 INFO L87 Difference]: Start difference. First operand 214 states and 622 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:08,798 INFO L93 Difference]: Finished difference Result 217 states and 619 transitions. [2022-02-11 00:05:08,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:05:08,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:05:08,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:08,800 INFO L225 Difference]: With dead ends: 217 [2022-02-11 00:05:08,800 INFO L226 Difference]: Without dead ends: 205 [2022-02-11 00:05:08,800 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:05:08,801 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:08,801 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 21 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:05:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-02-11 00:05:08,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 193. [2022-02-11 00:05:08,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.9114583333333335) internal successors, (559), 192 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 559 transitions. [2022-02-11 00:05:08,808 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 559 transitions. Word has length 17 [2022-02-11 00:05:08,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:08,808 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 559 transitions. [2022-02-11 00:05:08,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:08,808 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 559 transitions. [2022-02-11 00:05:08,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:05:08,809 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:08,809 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:08,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-11 00:05:08,809 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:08,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:08,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2082193652, now seen corresponding path program 1 times [2022-02-11 00:05:08,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:08,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175541079] [2022-02-11 00:05:08,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:08,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:08,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:08,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175541079] [2022-02-11 00:05:08,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175541079] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:08,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625791673] [2022-02-11 00:05:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:08,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:08,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:08,858 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:08,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-11 00:05:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:08,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-11 00:05:08,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:08,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:09,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625791673] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:09,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:09,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-02-11 00:05:09,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925863445] [2022-02-11 00:05:09,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:09,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:05:09,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:09,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:05:09,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:05:09,031 INFO L87 Difference]: Start difference. First operand 193 states and 559 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:09,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:09,102 INFO L93 Difference]: Finished difference Result 251 states and 731 transitions. [2022-02-11 00:05:09,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 00:05:09,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 00:05:09,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:09,104 INFO L225 Difference]: With dead ends: 251 [2022-02-11 00:05:09,104 INFO L226 Difference]: Without dead ends: 251 [2022-02-11 00:05:09,104 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:05:09,104 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:09,105 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 28 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-02-11 00:05:09,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 190. [2022-02-11 00:05:09,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9100529100529102) internal successors, (550), 189 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:09,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 550 transitions. [2022-02-11 00:05:09,111 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 550 transitions. Word has length 19 [2022-02-11 00:05:09,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:09,111 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 550 transitions. [2022-02-11 00:05:09,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:09,111 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 550 transitions. [2022-02-11 00:05:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:05:09,112 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:09,112 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:09,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:09,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-11 00:05:09,332 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:09,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1166690382, now seen corresponding path program 1 times [2022-02-11 00:05:09,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:09,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394934832] [2022-02-11 00:05:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:09,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:09,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:09,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394934832] [2022-02-11 00:05:09,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394934832] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:09,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665108421] [2022-02-11 00:05:09,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:09,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:09,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:09,420 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:09,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-11 00:05:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:09,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-11 00:05:09,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:09,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:09,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665108421] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:09,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:09,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2022-02-11 00:05:09,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682909576] [2022-02-11 00:05:09,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:09,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 00:05:09,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:09,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 00:05:09,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:05:09,763 INFO L87 Difference]: Start difference. First operand 190 states and 550 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:09,846 INFO L93 Difference]: Finished difference Result 516 states and 1501 transitions. [2022-02-11 00:05:09,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:05:09,847 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:05:09,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:09,852 INFO L225 Difference]: With dead ends: 516 [2022-02-11 00:05:09,852 INFO L226 Difference]: Without dead ends: 501 [2022-02-11 00:05:09,852 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:05:09,853 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 44 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:09,853 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 161 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:09,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-02-11 00:05:09,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 287. [2022-02-11 00:05:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.1363636363636362) internal successors, (897), 286 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:09,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 897 transitions. [2022-02-11 00:05:09,863 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 897 transitions. Word has length 21 [2022-02-11 00:05:09,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:09,864 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 897 transitions. [2022-02-11 00:05:09,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:09,864 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 897 transitions. [2022-02-11 00:05:09,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:05:09,865 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:09,865 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:09,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:10,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:10,092 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:10,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:10,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2047129442, now seen corresponding path program 2 times [2022-02-11 00:05:10,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:10,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870763705] [2022-02-11 00:05:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:10,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:10,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:10,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870763705] [2022-02-11 00:05:10,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870763705] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:10,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752193980] [2022-02-11 00:05:10,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:05:10,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:10,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:10,183 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:10,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-11 00:05:10,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:05:10,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:10,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-11 00:05:10,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:10,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:10,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752193980] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:10,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:10,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2022-02-11 00:05:10,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045808175] [2022-02-11 00:05:10,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:10,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 00:05:10,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:10,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 00:05:10,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:05:10,510 INFO L87 Difference]: Start difference. First operand 287 states and 897 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:10,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:10,578 INFO L93 Difference]: Finished difference Result 609 states and 1835 transitions. [2022-02-11 00:05:10,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:05:10,578 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:05:10,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:10,582 INFO L225 Difference]: With dead ends: 609 [2022-02-11 00:05:10,582 INFO L226 Difference]: Without dead ends: 594 [2022-02-11 00:05:10,582 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:05:10,583 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 59 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:10,583 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 138 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:10,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-02-11 00:05:10,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 376. [2022-02-11 00:05:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.2346666666666666) internal successors, (1213), 375 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1213 transitions. [2022-02-11 00:05:10,597 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1213 transitions. Word has length 21 [2022-02-11 00:05:10,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:10,597 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1213 transitions. [2022-02-11 00:05:10,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:10,597 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1213 transitions. [2022-02-11 00:05:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:05:10,598 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:10,599 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:10,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:10,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:10,811 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:10,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:10,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2140019540, now seen corresponding path program 3 times [2022-02-11 00:05:10,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:10,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805391273] [2022-02-11 00:05:10,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:10,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:10,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:10,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805391273] [2022-02-11 00:05:10,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805391273] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:10,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933990307] [2022-02-11 00:05:10,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:05:10,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:10,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:10,904 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:10,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-11 00:05:10,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:05:10,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:10,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-11 00:05:10,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:11,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:11,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933990307] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:11,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:11,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2022-02-11 00:05:11,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153954806] [2022-02-11 00:05:11,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:11,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:05:11,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:11,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:05:11,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:05:11,196 INFO L87 Difference]: Start difference. First operand 376 states and 1213 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:11,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:11,346 INFO L93 Difference]: Finished difference Result 683 states and 2108 transitions. [2022-02-11 00:05:11,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:05:11,347 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:05:11,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:11,351 INFO L225 Difference]: With dead ends: 683 [2022-02-11 00:05:11,351 INFO L226 Difference]: Without dead ends: 668 [2022-02-11 00:05:11,352 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:05:11,353 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 41 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:11,353 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 256 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-02-11 00:05:11,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 424. [2022-02-11 00:05:11,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.3120567375886525) internal successors, (1401), 423 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1401 transitions. [2022-02-11 00:05:11,370 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1401 transitions. Word has length 21 [2022-02-11 00:05:11,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:11,370 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1401 transitions. [2022-02-11 00:05:11,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:11,371 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1401 transitions. [2022-02-11 00:05:11,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:05:11,373 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:11,373 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:11,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:11,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-11 00:05:11,599 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:11,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:11,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1117539740, now seen corresponding path program 4 times [2022-02-11 00:05:11,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:11,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947676311] [2022-02-11 00:05:11,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:11,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:11,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:11,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947676311] [2022-02-11 00:05:11,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947676311] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:11,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007551295] [2022-02-11 00:05:11,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:05:11,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:11,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:11,691 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:11,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-11 00:05:11,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:05:11,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:11,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-11 00:05:11,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:11,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:05:12,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007551295] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:12,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:12,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 10 [2022-02-11 00:05:12,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321236401] [2022-02-11 00:05:12,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:12,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 00:05:12,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:12,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 00:05:12,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:05:12,002 INFO L87 Difference]: Start difference. First operand 424 states and 1401 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:12,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:12,127 INFO L93 Difference]: Finished difference Result 727 states and 2284 transitions. [2022-02-11 00:05:12,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:05:12,128 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:05:12,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:12,132 INFO L225 Difference]: With dead ends: 727 [2022-02-11 00:05:12,132 INFO L226 Difference]: Without dead ends: 712 [2022-02-11 00:05:12,133 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:05:12,133 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 58 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:12,133 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 193 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:12,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-02-11 00:05:12,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 497. [2022-02-11 00:05:12,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.3649193548387095) internal successors, (1669), 496 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:12,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1669 transitions. [2022-02-11 00:05:12,151 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1669 transitions. Word has length 21 [2022-02-11 00:05:12,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:12,151 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1669 transitions. [2022-02-11 00:05:12,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:12,151 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1669 transitions. [2022-02-11 00:05:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:05:12,153 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:12,153 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:12,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:12,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:12,370 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:12,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:12,370 INFO L85 PathProgramCache]: Analyzing trace with hash -466698584, now seen corresponding path program 5 times [2022-02-11 00:05:12,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:12,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426333318] [2022-02-11 00:05:12,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:12,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:12,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:12,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426333318] [2022-02-11 00:05:12,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426333318] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:12,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865706289] [2022-02-11 00:05:12,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:05:12,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:12,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:12,451 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:12,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-11 00:05:12,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:05:12,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:12,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-11 00:05:12,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:12,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:05:12,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865706289] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:12,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:12,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2022-02-11 00:05:12,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969531081] [2022-02-11 00:05:12,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:12,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:05:12,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:12,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:05:12,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:05:12,786 INFO L87 Difference]: Start difference. First operand 497 states and 1669 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:12,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:12,955 INFO L93 Difference]: Finished difference Result 846 states and 2684 transitions. [2022-02-11 00:05:12,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:05:12,955 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:05:12,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:12,961 INFO L225 Difference]: With dead ends: 846 [2022-02-11 00:05:12,961 INFO L226 Difference]: Without dead ends: 831 [2022-02-11 00:05:12,963 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:05:12,963 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 60 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:12,964 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 181 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:12,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-02-11 00:05:12,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 568. [2022-02-11 00:05:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 3.4038800705467374) internal successors, (1930), 567 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:12,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1930 transitions. [2022-02-11 00:05:12,988 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1930 transitions. Word has length 21 [2022-02-11 00:05:12,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:12,988 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 1930 transitions. [2022-02-11 00:05:12,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:12,989 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1930 transitions. [2022-02-11 00:05:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:05:12,990 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:12,990 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:13,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:13,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:13,204 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:13,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1622751956, now seen corresponding path program 6 times [2022-02-11 00:05:13,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:13,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475618184] [2022-02-11 00:05:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:13,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:13,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:13,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475618184] [2022-02-11 00:05:13,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475618184] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:13,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957199172] [2022-02-11 00:05:13,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:05:13,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:13,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:13,276 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:13,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-11 00:05:13,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:05:13,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:13,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-11 00:05:13,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:13,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:05:13,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957199172] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:13,606 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-11 00:05:13,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-02-11 00:05:13,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899034598] [2022-02-11 00:05:13,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:05:13,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:05:13,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:13,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:05:13,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:05:13,607 INFO L87 Difference]: Start difference. First operand 568 states and 1930 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:13,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:13,670 INFO L93 Difference]: Finished difference Result 852 states and 2756 transitions. [2022-02-11 00:05:13,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:05:13,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:05:13,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:13,676 INFO L225 Difference]: With dead ends: 852 [2022-02-11 00:05:13,676 INFO L226 Difference]: Without dead ends: 837 [2022-02-11 00:05:13,676 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:05:13,676 INFO L934 BasicCegarLoop]: 36 mSDtfsCounter, 30 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:13,677 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 113 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:13,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-02-11 00:05:13,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 613. [2022-02-11 00:05:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 3.4526143790849675) internal successors, (2113), 612 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:13,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 2113 transitions. [2022-02-11 00:05:13,700 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 2113 transitions. Word has length 21 [2022-02-11 00:05:13,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:13,700 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 2113 transitions. [2022-02-11 00:05:13,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:13,700 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 2113 transitions. [2022-02-11 00:05:13,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:05:13,702 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:13,702 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:13,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:13,923 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,SelfDestructingSolverStorable15 [2022-02-11 00:05:13,924 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:13,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:13,924 INFO L85 PathProgramCache]: Analyzing trace with hash 271449364, now seen corresponding path program 7 times [2022-02-11 00:05:13,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:13,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349368557] [2022-02-11 00:05:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:13,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:13,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:13,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349368557] [2022-02-11 00:05:13,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349368557] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:13,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152029012] [2022-02-11 00:05:13,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:05:13,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:13,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:13,963 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:13,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-11 00:05:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:13,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:13,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:14,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:14,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152029012] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:14,080 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:14,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-11 00:05:14,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546056063] [2022-02-11 00:05:14,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:14,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:05:14,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:14,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:05:14,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:05:14,082 INFO L87 Difference]: Start difference. First operand 613 states and 2113 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:14,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:14,197 INFO L93 Difference]: Finished difference Result 1015 states and 3183 transitions. [2022-02-11 00:05:14,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:05:14,198 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:05:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:14,203 INFO L225 Difference]: With dead ends: 1015 [2022-02-11 00:05:14,203 INFO L226 Difference]: Without dead ends: 1015 [2022-02-11 00:05:14,204 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:05:14,204 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 96 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:14,204 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 75 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:14,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-02-11 00:05:14,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 679. [2022-02-11 00:05:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 3.3997050147492627) internal successors, (2305), 678 states have internal predecessors, (2305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:14,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 2305 transitions. [2022-02-11 00:05:14,228 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 2305 transitions. Word has length 23 [2022-02-11 00:05:14,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:14,228 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 2305 transitions. [2022-02-11 00:05:14,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:14,228 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 2305 transitions. [2022-02-11 00:05:14,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:05:14,230 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:14,230 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:14,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:14,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-11 00:05:14,454 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:14,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:14,455 INFO L85 PathProgramCache]: Analyzing trace with hash -914641452, now seen corresponding path program 8 times [2022-02-11 00:05:14,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:14,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409004344] [2022-02-11 00:05:14,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:14,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:14,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:14,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409004344] [2022-02-11 00:05:14,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409004344] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:14,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054081865] [2022-02-11 00:05:14,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:05:14,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:14,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:14,489 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:14,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-11 00:05:14,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:05:14,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:14,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:14,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:14,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:14,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054081865] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:14,618 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:14,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-11 00:05:14,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445679982] [2022-02-11 00:05:14,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:14,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:05:14,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:14,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:05:14,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:05:14,619 INFO L87 Difference]: Start difference. First operand 679 states and 2305 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:14,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:14,747 INFO L93 Difference]: Finished difference Result 1019 states and 3281 transitions. [2022-02-11 00:05:14,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:05:14,748 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:05:14,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:14,755 INFO L225 Difference]: With dead ends: 1019 [2022-02-11 00:05:14,755 INFO L226 Difference]: Without dead ends: 994 [2022-02-11 00:05:14,755 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:05:14,756 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 91 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:14,756 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 42 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:14,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-02-11 00:05:14,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 833. [2022-02-11 00:05:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3822115384615383) internal successors, (2814), 832 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:14,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2814 transitions. [2022-02-11 00:05:14,790 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2814 transitions. Word has length 23 [2022-02-11 00:05:14,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:14,790 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 2814 transitions. [2022-02-11 00:05:14,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2814 transitions. [2022-02-11 00:05:14,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:05:14,794 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:14,794 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:14,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:15,007 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,SelfDestructingSolverStorable17 [2022-02-11 00:05:15,008 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:15,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:15,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1495214352, now seen corresponding path program 9 times [2022-02-11 00:05:15,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:15,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952545321] [2022-02-11 00:05:15,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:15,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:15,039 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:15,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952545321] [2022-02-11 00:05:15,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952545321] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:15,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363893535] [2022-02-11 00:05:15,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:05:15,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:15,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:15,041 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:15,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-11 00:05:15,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:05:15,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:15,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:15,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:15,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:15,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363893535] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:15,159 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:15,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-11 00:05:15,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43068144] [2022-02-11 00:05:15,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:15,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:05:15,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:15,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:05:15,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:05:15,161 INFO L87 Difference]: Start difference. First operand 833 states and 2814 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:15,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:15,279 INFO L93 Difference]: Finished difference Result 1551 states and 5055 transitions. [2022-02-11 00:05:15,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:05:15,279 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:05:15,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:15,289 INFO L225 Difference]: With dead ends: 1551 [2022-02-11 00:05:15,289 INFO L226 Difference]: Without dead ends: 1515 [2022-02-11 00:05:15,290 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:05:15,290 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:15,290 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 44 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:15,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2022-02-11 00:05:15,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1055. [2022-02-11 00:05:15,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 3.461100569259962) internal successors, (3648), 1054 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:15,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 3648 transitions. [2022-02-11 00:05:15,357 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 3648 transitions. Word has length 23 [2022-02-11 00:05:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:15,357 INFO L470 AbstractCegarLoop]: Abstraction has 1055 states and 3648 transitions. [2022-02-11 00:05:15,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:15,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 3648 transitions. [2022-02-11 00:05:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:05:15,361 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:15,361 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:15,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:15,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:15,575 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:15,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:15,575 INFO L85 PathProgramCache]: Analyzing trace with hash 9646224, now seen corresponding path program 10 times [2022-02-11 00:05:15,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:15,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494862118] [2022-02-11 00:05:15,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:15,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:15,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:15,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494862118] [2022-02-11 00:05:15,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494862118] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:15,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089715364] [2022-02-11 00:05:15,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:05:15,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:15,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:15,617 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:15,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-11 00:05:15,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:05:15,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:15,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:15,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:15,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:15,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089715364] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:15,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:15,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 00:05:15,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533964161] [2022-02-11 00:05:15,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:15,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:05:15,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:15,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:05:15,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:05:15,740 INFO L87 Difference]: Start difference. First operand 1055 states and 3648 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:15,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:15,832 INFO L93 Difference]: Finished difference Result 1290 states and 4241 transitions. [2022-02-11 00:05:15,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:05:15,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:05:15,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:15,842 INFO L225 Difference]: With dead ends: 1290 [2022-02-11 00:05:15,842 INFO L226 Difference]: Without dead ends: 1290 [2022-02-11 00:05:15,842 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:05:15,843 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 80 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:15,843 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 46 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:15,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-02-11 00:05:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1059. [2022-02-11 00:05:15,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 3.4224952741020793) internal successors, (3621), 1058 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 3621 transitions. [2022-02-11 00:05:15,881 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 3621 transitions. Word has length 23 [2022-02-11 00:05:15,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:15,881 INFO L470 AbstractCegarLoop]: Abstraction has 1059 states and 3621 transitions. [2022-02-11 00:05:15,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:15,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 3621 transitions. [2022-02-11 00:05:15,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:05:15,885 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:15,885 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:15,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:16,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:16,110 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:16,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:16,111 INFO L85 PathProgramCache]: Analyzing trace with hash 456257100, now seen corresponding path program 11 times [2022-02-11 00:05:16,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:16,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047563920] [2022-02-11 00:05:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:16,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:16,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:16,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047563920] [2022-02-11 00:05:16,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047563920] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:16,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631373603] [2022-02-11 00:05:16,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:05:16,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:16,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:16,146 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:16,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-11 00:05:16,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:05:16,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:16,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:16,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:16,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:16,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631373603] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:16,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:16,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 00:05:16,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937470177] [2022-02-11 00:05:16,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:16,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:05:16,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:16,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:05:16,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:05:16,282 INFO L87 Difference]: Start difference. First operand 1059 states and 3621 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:16,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:16,373 INFO L93 Difference]: Finished difference Result 1286 states and 4195 transitions. [2022-02-11 00:05:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:05:16,374 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:05:16,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:16,381 INFO L225 Difference]: With dead ends: 1286 [2022-02-11 00:05:16,382 INFO L226 Difference]: Without dead ends: 1280 [2022-02-11 00:05:16,382 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:05:16,383 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:16,383 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 41 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:16,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2022-02-11 00:05:16,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1084. [2022-02-11 00:05:16,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 3.3979686057248384) internal successors, (3680), 1083 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:16,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 3680 transitions. [2022-02-11 00:05:16,421 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 3680 transitions. Word has length 23 [2022-02-11 00:05:16,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:16,421 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 3680 transitions. [2022-02-11 00:05:16,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:16,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 3680 transitions. [2022-02-11 00:05:16,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:05:16,425 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:16,425 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:16,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:16,643 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,SelfDestructingSolverStorable20 [2022-02-11 00:05:16,643 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:16,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:16,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1608804944, now seen corresponding path program 12 times [2022-02-11 00:05:16,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:16,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501055559] [2022-02-11 00:05:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:16,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:16,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:16,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501055559] [2022-02-11 00:05:16,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501055559] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:16,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668003950] [2022-02-11 00:05:16,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:05:16,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:16,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:16,684 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:16,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-11 00:05:16,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:05:16,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:16,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:16,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:16,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:16,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668003950] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:16,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:16,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-02-11 00:05:16,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262506793] [2022-02-11 00:05:16,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:16,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:05:16,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:16,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:05:16,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:05:16,818 INFO L87 Difference]: Start difference. First operand 1084 states and 3680 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:17,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:17,398 INFO L93 Difference]: Finished difference Result 3419 states and 10720 transitions. [2022-02-11 00:05:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 00:05:17,399 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:05:17,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:17,432 INFO L225 Difference]: With dead ends: 3419 [2022-02-11 00:05:17,432 INFO L226 Difference]: Without dead ends: 3373 [2022-02-11 00:05:17,434 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=1262, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:05:17,435 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 462 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:17,435 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 71 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:05:17,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3373 states. [2022-02-11 00:05:17,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3373 to 1577. [2022-02-11 00:05:17,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 3.5266497461928936) internal successors, (5558), 1576 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 5558 transitions. [2022-02-11 00:05:17,509 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 5558 transitions. Word has length 23 [2022-02-11 00:05:17,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:17,509 INFO L470 AbstractCegarLoop]: Abstraction has 1577 states and 5558 transitions. [2022-02-11 00:05:17,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:17,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 5558 transitions. [2022-02-11 00:05:17,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:05:17,514 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:17,514 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:17,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:17,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:17,727 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:17,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:17,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1526508494, now seen corresponding path program 13 times [2022-02-11 00:05:17,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:17,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621645546] [2022-02-11 00:05:17,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:17,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:17,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:17,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621645546] [2022-02-11 00:05:17,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621645546] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:17,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706387262] [2022-02-11 00:05:17,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:05:17,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:17,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:17,762 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:17,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-11 00:05:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:17,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:17,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:17,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:17,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706387262] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:17,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:17,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 00:05:17,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775673604] [2022-02-11 00:05:17,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:17,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:05:17,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:17,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:05:17,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:05:17,889 INFO L87 Difference]: Start difference. First operand 1577 states and 5558 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:17,984 INFO L93 Difference]: Finished difference Result 2581 states and 8875 transitions. [2022-02-11 00:05:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:05:17,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:05:17,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:17,993 INFO L225 Difference]: With dead ends: 2581 [2022-02-11 00:05:17,993 INFO L226 Difference]: Without dead ends: 2581 [2022-02-11 00:05:17,994 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:05:17,994 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 101 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:17,994 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 45 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:17,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2022-02-11 00:05:18,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 1980. [2022-02-11 00:05:18,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.6195048004042447) internal successors, (7163), 1979 states have internal predecessors, (7163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 7163 transitions. [2022-02-11 00:05:18,067 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 7163 transitions. Word has length 23 [2022-02-11 00:05:18,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:18,068 INFO L470 AbstractCegarLoop]: Abstraction has 1980 states and 7163 transitions. [2022-02-11 00:05:18,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:18,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 7163 transitions. [2022-02-11 00:05:18,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:05:18,074 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:18,074 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:18,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:18,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:18,299 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:18,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:18,299 INFO L85 PathProgramCache]: Analyzing trace with hash 18908238, now seen corresponding path program 14 times [2022-02-11 00:05:18,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:18,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892706008] [2022-02-11 00:05:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:18,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:18,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:18,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892706008] [2022-02-11 00:05:18,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892706008] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:18,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430803973] [2022-02-11 00:05:18,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:05:18,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:18,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:18,336 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:18,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-11 00:05:18,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:05:18,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:18,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:18,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:18,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:18,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430803973] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:18,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:18,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-02-11 00:05:18,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958800074] [2022-02-11 00:05:18,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:18,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:05:18,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:18,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:05:18,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:05:18,491 INFO L87 Difference]: Start difference. First operand 1980 states and 7163 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:19,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:19,073 INFO L93 Difference]: Finished difference Result 4590 states and 15506 transitions. [2022-02-11 00:05:19,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:05:19,074 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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 23 [2022-02-11 00:05:19,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:19,088 INFO L225 Difference]: With dead ends: 4590 [2022-02-11 00:05:19,089 INFO L226 Difference]: Without dead ends: 4355 [2022-02-11 00:05:19,089 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:05:19,090 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 243 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:19,090 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 122 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:05:19,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4355 states. [2022-02-11 00:05:19,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4355 to 3174. [2022-02-11 00:05:19,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3174 states, 3173 states have (on average 3.6706586826347305) internal successors, (11647), 3173 states have internal predecessors, (11647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:19,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 11647 transitions. [2022-02-11 00:05:19,212 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 11647 transitions. Word has length 23 [2022-02-11 00:05:19,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:19,213 INFO L470 AbstractCegarLoop]: Abstraction has 3174 states and 11647 transitions. [2022-02-11 00:05:19,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:19,213 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 11647 transitions. [2022-02-11 00:05:19,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:05:19,222 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:19,222 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:19,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:19,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-02-11 00:05:19,448 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:19,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:19,448 INFO L85 PathProgramCache]: Analyzing trace with hash -593433466, now seen corresponding path program 15 times [2022-02-11 00:05:19,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:19,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999131936] [2022-02-11 00:05:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:19,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:19,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:19,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999131936] [2022-02-11 00:05:19,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999131936] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:19,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556713180] [2022-02-11 00:05:19,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:05:19,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:19,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:19,480 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:19,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-11 00:05:19,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:05:19,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:19,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:19,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:19,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:19,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556713180] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:19,627 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:19,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-02-11 00:05:19,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003640920] [2022-02-11 00:05:19,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:19,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:05:19,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:19,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:05:19,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:05:19,628 INFO L87 Difference]: Start difference. First operand 3174 states and 11647 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:20,149 INFO L93 Difference]: Finished difference Result 7723 states and 26392 transitions. [2022-02-11 00:05:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:05:20,149 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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 23 [2022-02-11 00:05:20,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:20,217 INFO L225 Difference]: With dead ends: 7723 [2022-02-11 00:05:20,217 INFO L226 Difference]: Without dead ends: 7502 [2022-02-11 00:05:20,217 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:05:20,218 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 304 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:20,219 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 81 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:05:20,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7502 states. [2022-02-11 00:05:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7502 to 5181. [2022-02-11 00:05:20,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5181 states, 5180 states have (on average 3.6795366795366795) internal successors, (19060), 5180 states have internal predecessors, (19060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5181 states to 5181 states and 19060 transitions. [2022-02-11 00:05:20,430 INFO L78 Accepts]: Start accepts. Automaton has 5181 states and 19060 transitions. Word has length 23 [2022-02-11 00:05:20,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:20,431 INFO L470 AbstractCegarLoop]: Abstraction has 5181 states and 19060 transitions. [2022-02-11 00:05:20,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:20,432 INFO L276 IsEmpty]: Start isEmpty. Operand 5181 states and 19060 transitions. [2022-02-11 00:05:20,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:05:20,449 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:20,449 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:20,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:20,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:20,663 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:20,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:20,664 INFO L85 PathProgramCache]: Analyzing trace with hash -712649734, now seen corresponding path program 16 times [2022-02-11 00:05:20,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:20,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217275111] [2022-02-11 00:05:20,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:20,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:20,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:20,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217275111] [2022-02-11 00:05:20,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217275111] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:20,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737301820] [2022-02-11 00:05:20,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:05:20,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:20,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:20,700 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:20,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-11 00:05:20,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:05:20,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:20,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:20,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:20,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:20,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737301820] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:20,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:20,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-11 00:05:20,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008699256] [2022-02-11 00:05:20,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:20,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:05:20,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:20,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:05:20,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:05:20,815 INFO L87 Difference]: Start difference. First operand 5181 states and 19060 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:20,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:20,931 INFO L93 Difference]: Finished difference Result 5996 states and 21312 transitions. [2022-02-11 00:05:20,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:05:20,935 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:05:20,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:21,002 INFO L225 Difference]: With dead ends: 5996 [2022-02-11 00:05:21,002 INFO L226 Difference]: Without dead ends: 5952 [2022-02-11 00:05:21,003 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:05:21,003 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:21,003 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 42 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:21,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5952 states. [2022-02-11 00:05:21,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5952 to 5234. [2022-02-11 00:05:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 5233 states have (on average 3.675329638830499) internal successors, (19233), 5233 states have internal predecessors, (19233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:21,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 19233 transitions. [2022-02-11 00:05:21,178 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 19233 transitions. Word has length 23 [2022-02-11 00:05:21,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:21,179 INFO L470 AbstractCegarLoop]: Abstraction has 5234 states and 19233 transitions. [2022-02-11 00:05:21,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:21,179 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 19233 transitions. [2022-02-11 00:05:21,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:05:21,193 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:21,193 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:21,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:21,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:21,408 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:21,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:21,409 INFO L85 PathProgramCache]: Analyzing trace with hash -974522626, now seen corresponding path program 17 times [2022-02-11 00:05:21,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:21,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75321843] [2022-02-11 00:05:21,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:21,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:21,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:21,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75321843] [2022-02-11 00:05:21,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75321843] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:21,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92880735] [2022-02-11 00:05:21,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:05:21,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:21,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:21,451 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:21,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-11 00:05:21,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:05:21,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:21,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:21,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:05:21,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:05:21,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92880735] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:21,582 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:21,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-11 00:05:21,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250513054] [2022-02-11 00:05:21,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:21,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 00:05:21,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:21,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 00:05:21,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:05:21,584 INFO L87 Difference]: Start difference. First operand 5234 states and 19233 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:22,052 INFO L93 Difference]: Finished difference Result 9182 states and 31734 transitions. [2022-02-11 00:05:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:05:22,052 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:05:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:22,084 INFO L225 Difference]: With dead ends: 9182 [2022-02-11 00:05:22,085 INFO L226 Difference]: Without dead ends: 9113 [2022-02-11 00:05:22,085 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:05:22,086 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 336 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:22,086 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 80 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:05:22,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9113 states. [2022-02-11 00:05:22,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9113 to 6200. [2022-02-11 00:05:22,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6200 states, 6199 states have (on average 3.698015809001452) internal successors, (22924), 6199 states have internal predecessors, (22924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:22,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6200 states to 6200 states and 22924 transitions. [2022-02-11 00:05:22,338 INFO L78 Accepts]: Start accepts. Automaton has 6200 states and 22924 transitions. Word has length 23 [2022-02-11 00:05:22,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:22,339 INFO L470 AbstractCegarLoop]: Abstraction has 6200 states and 22924 transitions. [2022-02-11 00:05:22,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:22,339 INFO L276 IsEmpty]: Start isEmpty. Operand 6200 states and 22924 transitions. [2022-02-11 00:05:22,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:05:22,354 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:22,354 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:22,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:22,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:22,576 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:22,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:22,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1591412358, now seen corresponding path program 18 times [2022-02-11 00:05:22,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:22,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877138590] [2022-02-11 00:05:22,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:22,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:22,624 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:22,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877138590] [2022-02-11 00:05:22,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877138590] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:22,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577259426] [2022-02-11 00:05:22,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:05:22,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:22,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:22,626 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:22,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-11 00:05:22,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:05:22,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:22,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:22,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:05:22,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:05:22,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577259426] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:22,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:22,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-02-11 00:05:22,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474732694] [2022-02-11 00:05:22,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:22,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:05:22,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:22,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:05:22,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:05:22,744 INFO L87 Difference]: Start difference. First operand 6200 states and 22924 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:23,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:23,345 INFO L93 Difference]: Finished difference Result 10470 states and 36628 transitions. [2022-02-11 00:05:23,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:05:23,345 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:05:23,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:23,374 INFO L225 Difference]: With dead ends: 10470 [2022-02-11 00:05:23,375 INFO L226 Difference]: Without dead ends: 10415 [2022-02-11 00:05:23,375 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=942, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:05:23,376 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 264 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:23,376 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 99 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:05:23,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10415 states. [2022-02-11 00:05:23,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10415 to 7346. [2022-02-11 00:05:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7346 states, 7345 states have (on average 3.723621511232131) internal successors, (27350), 7345 states have internal predecessors, (27350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7346 states to 7346 states and 27350 transitions. [2022-02-11 00:05:23,686 INFO L78 Accepts]: Start accepts. Automaton has 7346 states and 27350 transitions. Word has length 23 [2022-02-11 00:05:23,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:23,686 INFO L470 AbstractCegarLoop]: Abstraction has 7346 states and 27350 transitions. [2022-02-11 00:05:23,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:23,687 INFO L276 IsEmpty]: Start isEmpty. Operand 7346 states and 27350 transitions. [2022-02-11 00:05:23,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:05:23,708 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:23,708 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:23,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:23,909 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,SelfDestructingSolverStorable27 [2022-02-11 00:05:23,910 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:23,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:23,910 INFO L85 PathProgramCache]: Analyzing trace with hash -918016754, now seen corresponding path program 19 times [2022-02-11 00:05:23,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:23,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149257511] [2022-02-11 00:05:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:23,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:23,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:23,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149257511] [2022-02-11 00:05:23,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149257511] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:23,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673743420] [2022-02-11 00:05:23,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:05:23,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:23,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:23,940 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:23,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-11 00:05:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:23,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:23,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:24,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:24,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673743420] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:24,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:24,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 00:05:24,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429948551] [2022-02-11 00:05:24,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:24,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:05:24,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:24,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:05:24,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:05:24,058 INFO L87 Difference]: Start difference. First operand 7346 states and 27350 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:24,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:24,188 INFO L93 Difference]: Finished difference Result 8860 states and 32006 transitions. [2022-02-11 00:05:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:05:24,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:05:24,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:24,214 INFO L225 Difference]: With dead ends: 8860 [2022-02-11 00:05:24,214 INFO L226 Difference]: Without dead ends: 8846 [2022-02-11 00:05:24,214 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:05:24,215 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:24,215 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 54 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:24,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8846 states. [2022-02-11 00:05:24,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8846 to 7488. [2022-02-11 00:05:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7488 states, 7487 states have (on average 3.7205823427273943) internal successors, (27856), 7487 states have internal predecessors, (27856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:24,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7488 states to 7488 states and 27856 transitions. [2022-02-11 00:05:24,580 INFO L78 Accepts]: Start accepts. Automaton has 7488 states and 27856 transitions. Word has length 23 [2022-02-11 00:05:24,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:24,580 INFO L470 AbstractCegarLoop]: Abstraction has 7488 states and 27856 transitions. [2022-02-11 00:05:24,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:24,581 INFO L276 IsEmpty]: Start isEmpty. Operand 7488 states and 27856 transitions. [2022-02-11 00:05:24,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:05:24,606 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:24,606 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:24,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:24,831 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,SelfDestructingSolverStorable28 [2022-02-11 00:05:24,832 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:24,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:24,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1342327990, now seen corresponding path program 20 times [2022-02-11 00:05:24,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:24,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388060249] [2022-02-11 00:05:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:24,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:24,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:24,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388060249] [2022-02-11 00:05:24,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388060249] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:24,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835884935] [2022-02-11 00:05:24,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:05:24,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:24,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:24,868 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:24,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-11 00:05:24,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:05:24,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:24,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:24,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:24,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:24,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835884935] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:24,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:24,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-11 00:05:24,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969130514] [2022-02-11 00:05:24,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:25,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 00:05:25,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:25,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 00:05:25,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:05:25,001 INFO L87 Difference]: Start difference. First operand 7488 states and 27856 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:25,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:25,540 INFO L93 Difference]: Finished difference Result 13198 states and 46799 transitions. [2022-02-11 00:05:25,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:05:25,540 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:05:25,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:25,576 INFO L225 Difference]: With dead ends: 13198 [2022-02-11 00:05:25,576 INFO L226 Difference]: Without dead ends: 13147 [2022-02-11 00:05:25,577 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=1108, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:05:25,577 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 191 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:25,577 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 85 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:05:25,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13147 states. [2022-02-11 00:05:25,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13147 to 9889. [2022-02-11 00:05:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9889 states, 9888 states have (on average 3.7355380258899675) internal successors, (36937), 9888 states have internal predecessors, (36937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:25,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9889 states to 9889 states and 36937 transitions. [2022-02-11 00:05:25,874 INFO L78 Accepts]: Start accepts. Automaton has 9889 states and 36937 transitions. Word has length 23 [2022-02-11 00:05:25,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:25,874 INFO L470 AbstractCegarLoop]: Abstraction has 9889 states and 36937 transitions. [2022-02-11 00:05:25,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:25,874 INFO L276 IsEmpty]: Start isEmpty. Operand 9889 states and 36937 transitions. [2022-02-11 00:05:25,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:05:25,901 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:25,902 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:25,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:26,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:26,127 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:26,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:26,127 INFO L85 PathProgramCache]: Analyzing trace with hash 778321758, now seen corresponding path program 21 times [2022-02-11 00:05:26,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:26,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459998404] [2022-02-11 00:05:26,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:26,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:26,157 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:26,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459998404] [2022-02-11 00:05:26,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459998404] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:26,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513411569] [2022-02-11 00:05:26,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:05:26,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:26,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:26,159 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:26,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-11 00:05:26,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:05:26,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:26,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:26,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:26,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:26,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513411569] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:26,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:26,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-11 00:05:26,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202673604] [2022-02-11 00:05:26,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:26,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:05:26,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:26,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:05:26,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:05:26,273 INFO L87 Difference]: Start difference. First operand 9889 states and 36937 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:26,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:26,426 INFO L93 Difference]: Finished difference Result 11772 states and 42696 transitions. [2022-02-11 00:05:26,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:05:26,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:05:26,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:26,470 INFO L225 Difference]: With dead ends: 11772 [2022-02-11 00:05:26,470 INFO L226 Difference]: Without dead ends: 11719 [2022-02-11 00:05:26,471 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:05:26,471 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 72 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:26,471 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 60 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:26,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11719 states. [2022-02-11 00:05:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11719 to 9815. [2022-02-11 00:05:26,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9815 states, 9814 states have (on average 3.7139800285306706) internal successors, (36449), 9814 states have internal predecessors, (36449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:26,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9815 states to 9815 states and 36449 transitions. [2022-02-11 00:05:26,820 INFO L78 Accepts]: Start accepts. Automaton has 9815 states and 36449 transitions. Word has length 23 [2022-02-11 00:05:26,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:26,820 INFO L470 AbstractCegarLoop]: Abstraction has 9815 states and 36449 transitions. [2022-02-11 00:05:26,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:26,820 INFO L276 IsEmpty]: Start isEmpty. Operand 9815 states and 36449 transitions. [2022-02-11 00:05:26,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:05:26,907 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:26,907 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:26,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:27,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:27,108 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:27,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:27,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1875112408, now seen corresponding path program 22 times [2022-02-11 00:05:27,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:27,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145404241] [2022-02-11 00:05:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:27,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:27,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:27,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145404241] [2022-02-11 00:05:27,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145404241] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:27,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605457605] [2022-02-11 00:05:27,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:05:27,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:27,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:27,145 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:27,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-11 00:05:27,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:05:27,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:27,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:27,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:05:27,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:05:27,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605457605] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:27,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:27,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 00:05:27,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047281750] [2022-02-11 00:05:27,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:27,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:05:27,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:27,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:05:27,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:05:27,291 INFO L87 Difference]: Start difference. First operand 9815 states and 36449 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:27,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:27,492 INFO L93 Difference]: Finished difference Result 14865 states and 53865 transitions. [2022-02-11 00:05:27,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:05:27,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-11 00:05:27,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:27,556 INFO L225 Difference]: With dead ends: 14865 [2022-02-11 00:05:27,556 INFO L226 Difference]: Without dead ends: 14851 [2022-02-11 00:05:27,556 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:05:27,557 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 92 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:27,557 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 46 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:27,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14851 states. [2022-02-11 00:05:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14851 to 12374. [2022-02-11 00:05:27,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12374 states, 12373 states have (on average 3.750990058999434) internal successors, (46411), 12373 states have internal predecessors, (46411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:28,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12374 states to 12374 states and 46411 transitions. [2022-02-11 00:05:28,039 INFO L78 Accepts]: Start accepts. Automaton has 12374 states and 46411 transitions. Word has length 25 [2022-02-11 00:05:28,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:28,039 INFO L470 AbstractCegarLoop]: Abstraction has 12374 states and 46411 transitions. [2022-02-11 00:05:28,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:28,039 INFO L276 IsEmpty]: Start isEmpty. Operand 12374 states and 46411 transitions. [2022-02-11 00:05:28,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:05:28,128 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:28,128 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:28,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:28,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:28,328 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:28,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:28,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1895071392, now seen corresponding path program 23 times [2022-02-11 00:05:28,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:28,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212772573] [2022-02-11 00:05:28,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:28,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:28,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:28,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212772573] [2022-02-11 00:05:28,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212772573] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:28,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250786790] [2022-02-11 00:05:28,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:05:28,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:28,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:28,355 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:28,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-11 00:05:28,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:05:28,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:28,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:28,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:05:28,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:05:28,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250786790] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:28,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:28,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 00:05:28,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872434372] [2022-02-11 00:05:28,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:28,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:05:28,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:28,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:05:28,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:05:28,461 INFO L87 Difference]: Start difference. First operand 12374 states and 46411 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:28,623 INFO L93 Difference]: Finished difference Result 14384 states and 52212 transitions. [2022-02-11 00:05:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:05:28,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-11 00:05:28,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:28,668 INFO L225 Difference]: With dead ends: 14384 [2022-02-11 00:05:28,668 INFO L226 Difference]: Without dead ends: 14331 [2022-02-11 00:05:28,668 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:05:28,669 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 82 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:28,669 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 40 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:28,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14331 states. [2022-02-11 00:05:29,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14331 to 12343. [2022-02-11 00:05:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12343 states, 12342 states have (on average 3.7488251498946688) internal successors, (46268), 12342 states have internal predecessors, (46268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:29,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12343 states to 12343 states and 46268 transitions. [2022-02-11 00:05:29,095 INFO L78 Accepts]: Start accepts. Automaton has 12343 states and 46268 transitions. Word has length 25 [2022-02-11 00:05:29,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:29,095 INFO L470 AbstractCegarLoop]: Abstraction has 12343 states and 46268 transitions. [2022-02-11 00:05:29,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:29,095 INFO L276 IsEmpty]: Start isEmpty. Operand 12343 states and 46268 transitions. [2022-02-11 00:05:29,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:05:29,119 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:29,119 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:29,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:29,319 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,SelfDestructingSolverStorable32 [2022-02-11 00:05:29,319 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:29,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:29,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1021468140, now seen corresponding path program 24 times [2022-02-11 00:05:29,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:29,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308054974] [2022-02-11 00:05:29,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:29,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:05:29,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:29,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308054974] [2022-02-11 00:05:29,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308054974] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:29,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884199761] [2022-02-11 00:05:29,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:05:29,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:29,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:29,355 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:29,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-11 00:05:29,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:05:29,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:29,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:29,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:29,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:29,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884199761] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:29,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:29,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-02-11 00:05:29,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325678899] [2022-02-11 00:05:29,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:29,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:05:29,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:29,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:05:29,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:05:29,476 INFO L87 Difference]: Start difference. First operand 12343 states and 46268 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:29,988 INFO L93 Difference]: Finished difference Result 15025 states and 53947 transitions. [2022-02-11 00:05:29,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:05:29,989 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-11 00:05:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:30,035 INFO L225 Difference]: With dead ends: 15025 [2022-02-11 00:05:30,036 INFO L226 Difference]: Without dead ends: 14843 [2022-02-11 00:05:30,036 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:05:30,037 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 217 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:30,037 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 95 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:05:30,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14843 states. [2022-02-11 00:05:30,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14843 to 12521. [2022-02-11 00:05:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12521 states, 12520 states have (on average 3.7399361022364217) internal successors, (46824), 12520 states have internal predecessors, (46824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12521 states to 12521 states and 46824 transitions. [2022-02-11 00:05:30,495 INFO L78 Accepts]: Start accepts. Automaton has 12521 states and 46824 transitions. Word has length 25 [2022-02-11 00:05:30,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:30,495 INFO L470 AbstractCegarLoop]: Abstraction has 12521 states and 46824 transitions. [2022-02-11 00:05:30,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:30,495 INFO L276 IsEmpty]: Start isEmpty. Operand 12521 states and 46824 transitions. [2022-02-11 00:05:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:05:30,522 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:30,523 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:30,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-02-11 00:05:30,723 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,SelfDestructingSolverStorable33 [2022-02-11 00:05:30,723 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:30,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:30,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1240654612, now seen corresponding path program 25 times [2022-02-11 00:05:30,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:30,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210083709] [2022-02-11 00:05:30,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:30,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:30,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:30,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210083709] [2022-02-11 00:05:30,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210083709] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:30,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951178742] [2022-02-11 00:05:30,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:05:30,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:30,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:30,824 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:30,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-11 00:05:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:30,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:05:30,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:31,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:31,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951178742] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:31,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:31,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2022-02-11 00:05:31,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032391217] [2022-02-11 00:05:31,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:31,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:05:31,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:31,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:05:31,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:05:31,310 INFO L87 Difference]: Start difference. First operand 12521 states and 46824 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:31,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:31,724 INFO L93 Difference]: Finished difference Result 14348 states and 52474 transitions. [2022-02-11 00:05:31,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:05:31,725 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:05:31,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:31,791 INFO L225 Difference]: With dead ends: 14348 [2022-02-11 00:05:31,791 INFO L226 Difference]: Without dead ends: 14278 [2022-02-11 00:05:31,792 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:05:31,792 INFO L934 BasicCegarLoop]: 68 mSDtfsCounter, 114 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:31,793 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 703 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:05:31,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14278 states. [2022-02-11 00:05:32,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14278 to 13277. [2022-02-11 00:05:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13277 states, 13276 states have (on average 3.7333534197047302) internal successors, (49564), 13276 states have internal predecessors, (49564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13277 states to 13277 states and 49564 transitions. [2022-02-11 00:05:32,271 INFO L78 Accepts]: Start accepts. Automaton has 13277 states and 49564 transitions. Word has length 27 [2022-02-11 00:05:32,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:32,271 INFO L470 AbstractCegarLoop]: Abstraction has 13277 states and 49564 transitions. [2022-02-11 00:05:32,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:32,271 INFO L276 IsEmpty]: Start isEmpty. Operand 13277 states and 49564 transitions. [2022-02-11 00:05:32,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:05:32,398 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:32,398 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:32,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:32,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-02-11 00:05:32,599 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:32,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:32,599 INFO L85 PathProgramCache]: Analyzing trace with hash -735077948, now seen corresponding path program 26 times [2022-02-11 00:05:32,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:32,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028822481] [2022-02-11 00:05:32,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:32,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:32,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:32,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028822481] [2022-02-11 00:05:32,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028822481] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:32,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425438350] [2022-02-11 00:05:32,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:05:32,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:32,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:32,696 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:32,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-11 00:05:32,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:05:32,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:32,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:05:32,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:33,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:33,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425438350] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:33,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:33,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-11 00:05:33,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963450113] [2022-02-11 00:05:33,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:33,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:05:33,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:33,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:05:33,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:33,168 INFO L87 Difference]: Start difference. First operand 13277 states and 49564 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:33,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:33,431 INFO L93 Difference]: Finished difference Result 14230 states and 52441 transitions. [2022-02-11 00:05:33,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:05:33,431 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:05:33,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:33,472 INFO L225 Difference]: With dead ends: 14230 [2022-02-11 00:05:33,473 INFO L226 Difference]: Without dead ends: 14200 [2022-02-11 00:05:33,474 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:33,474 INFO L934 BasicCegarLoop]: 61 mSDtfsCounter, 105 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:33,474 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 476 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:05:33,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14200 states. [2022-02-11 00:05:33,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14200 to 13587. [2022-02-11 00:05:33,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13587 states, 13586 states have (on average 3.7320771382305313) internal successors, (50704), 13586 states have internal predecessors, (50704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13587 states to 13587 states and 50704 transitions. [2022-02-11 00:05:33,892 INFO L78 Accepts]: Start accepts. Automaton has 13587 states and 50704 transitions. Word has length 27 [2022-02-11 00:05:33,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:33,892 INFO L470 AbstractCegarLoop]: Abstraction has 13587 states and 50704 transitions. [2022-02-11 00:05:33,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:33,892 INFO L276 IsEmpty]: Start isEmpty. Operand 13587 states and 50704 transitions. [2022-02-11 00:05:33,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:05:33,948 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:33,948 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:34,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-02-11 00:05:34,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:34,163 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:34,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:34,164 INFO L85 PathProgramCache]: Analyzing trace with hash -699772612, now seen corresponding path program 27 times [2022-02-11 00:05:34,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:34,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593341835] [2022-02-11 00:05:34,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:34,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:34,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:34,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593341835] [2022-02-11 00:05:34,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593341835] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:34,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504202676] [2022-02-11 00:05:34,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:05:34,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:34,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:34,252 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:34,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-11 00:05:34,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:05:34,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:34,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:05:34,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:34,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:34,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:34,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504202676] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:34,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:34,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-11 00:05:34,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668872486] [2022-02-11 00:05:34,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:34,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:05:34,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:34,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:05:34,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:34,707 INFO L87 Difference]: Start difference. First operand 13587 states and 50704 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:35,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:35,030 INFO L93 Difference]: Finished difference Result 14461 states and 53364 transitions. [2022-02-11 00:05:35,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:05:35,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:05:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:35,190 INFO L225 Difference]: With dead ends: 14461 [2022-02-11 00:05:35,190 INFO L226 Difference]: Without dead ends: 14431 [2022-02-11 00:05:35,190 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:35,191 INFO L934 BasicCegarLoop]: 61 mSDtfsCounter, 98 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:35,191 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 524 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:05:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14431 states. [2022-02-11 00:05:35,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14431 to 13866. [2022-02-11 00:05:35,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13866 states, 13865 states have (on average 3.7306887847097006) internal successors, (51726), 13865 states have internal predecessors, (51726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:35,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13866 states to 13866 states and 51726 transitions. [2022-02-11 00:05:35,597 INFO L78 Accepts]: Start accepts. Automaton has 13866 states and 51726 transitions. Word has length 27 [2022-02-11 00:05:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:35,597 INFO L470 AbstractCegarLoop]: Abstraction has 13866 states and 51726 transitions. [2022-02-11 00:05:35,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 13866 states and 51726 transitions. [2022-02-11 00:05:35,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:05:35,627 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:35,627 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:35,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-02-11 00:05:35,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-11 00:05:35,828 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:35,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:35,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1612841472, now seen corresponding path program 28 times [2022-02-11 00:05:35,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:35,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142392771] [2022-02-11 00:05:35,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:35,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:35,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:35,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142392771] [2022-02-11 00:05:35,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142392771] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:35,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576192178] [2022-02-11 00:05:35,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:05:35,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:35,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:35,912 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:35,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-11 00:05:35,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:05:35,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:35,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:05:35,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:36,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:36,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:36,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576192178] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:36,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:36,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-11 00:05:36,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600773819] [2022-02-11 00:05:36,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:36,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:05:36,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:36,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:05:36,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:36,349 INFO L87 Difference]: Start difference. First operand 13866 states and 51726 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:36,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:36,655 INFO L93 Difference]: Finished difference Result 14772 states and 54367 transitions. [2022-02-11 00:05:36,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:05:36,655 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:05:36,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:36,704 INFO L225 Difference]: With dead ends: 14772 [2022-02-11 00:05:36,704 INFO L226 Difference]: Without dead ends: 14726 [2022-02-11 00:05:36,704 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:36,704 INFO L934 BasicCegarLoop]: 61 mSDtfsCounter, 105 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:36,705 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 476 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:05:36,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14726 states. [2022-02-11 00:05:37,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14726 to 14096. [2022-02-11 00:05:37,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14096 states, 14095 states have (on average 3.7281305427456544) internal successors, (52548), 14095 states have internal predecessors, (52548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:37,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14096 states to 14096 states and 52548 transitions. [2022-02-11 00:05:37,125 INFO L78 Accepts]: Start accepts. Automaton has 14096 states and 52548 transitions. Word has length 27 [2022-02-11 00:05:37,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:37,125 INFO L470 AbstractCegarLoop]: Abstraction has 14096 states and 52548 transitions. [2022-02-11 00:05:37,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:37,126 INFO L276 IsEmpty]: Start isEmpty. Operand 14096 states and 52548 transitions. [2022-02-11 00:05:37,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:05:37,154 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:37,154 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:37,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-02-11 00:05:37,354 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,SelfDestructingSolverStorable37 [2022-02-11 00:05:37,355 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:37,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:37,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1062035200, now seen corresponding path program 29 times [2022-02-11 00:05:37,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:37,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753588646] [2022-02-11 00:05:37,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:37,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:37,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:37,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753588646] [2022-02-11 00:05:37,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753588646] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:37,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021319826] [2022-02-11 00:05:37,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:05:37,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:37,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:37,436 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:37,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-11 00:05:37,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:05:37,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:37,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:05:37,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:37,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:37,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021319826] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:37,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:37,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2022-02-11 00:05:37,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012844355] [2022-02-11 00:05:37,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:37,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:05:37,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:37,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:05:37,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:05:37,852 INFO L87 Difference]: Start difference. First operand 14096 states and 52548 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:38,452 INFO L93 Difference]: Finished difference Result 15755 states and 57606 transitions. [2022-02-11 00:05:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:05:38,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:05:38,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:38,514 INFO L225 Difference]: With dead ends: 15755 [2022-02-11 00:05:38,514 INFO L226 Difference]: Without dead ends: 15715 [2022-02-11 00:05:38,514 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:05:38,515 INFO L934 BasicCegarLoop]: 78 mSDtfsCounter, 120 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:38,515 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 788 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:05:38,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15715 states. [2022-02-11 00:05:38,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15715 to 14639. [2022-02-11 00:05:38,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14639 states, 14638 states have (on average 3.7261237874026505) internal successors, (54543), 14638 states have internal predecessors, (54543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:38,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14639 states to 14639 states and 54543 transitions. [2022-02-11 00:05:38,999 INFO L78 Accepts]: Start accepts. Automaton has 14639 states and 54543 transitions. Word has length 27 [2022-02-11 00:05:38,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:38,999 INFO L470 AbstractCegarLoop]: Abstraction has 14639 states and 54543 transitions. [2022-02-11 00:05:38,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:39,000 INFO L276 IsEmpty]: Start isEmpty. Operand 14639 states and 54543 transitions. [2022-02-11 00:05:39,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:05:39,029 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:39,029 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:39,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-11 00:05:39,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-11 00:05:39,230 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:39,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:39,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1241990722, now seen corresponding path program 30 times [2022-02-11 00:05:39,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:39,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322175607] [2022-02-11 00:05:39,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:39,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:39,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:39,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322175607] [2022-02-11 00:05:39,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322175607] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:39,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376095956] [2022-02-11 00:05:39,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:05:39,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:39,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:39,320 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:39,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-11 00:05:39,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:05:39,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:39,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:05:39,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:39,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:39,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376095956] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:39,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:39,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-11 00:05:39,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821543628] [2022-02-11 00:05:39,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:39,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:05:39,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:39,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:05:39,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:39,714 INFO L87 Difference]: Start difference. First operand 14639 states and 54543 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:40,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:40,006 INFO L93 Difference]: Finished difference Result 15284 states and 56431 transitions. [2022-02-11 00:05:40,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:05:40,006 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:05:40,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:40,055 INFO L225 Difference]: With dead ends: 15284 [2022-02-11 00:05:40,055 INFO L226 Difference]: Without dead ends: 15139 [2022-02-11 00:05:40,056 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:40,056 INFO L934 BasicCegarLoop]: 54 mSDtfsCounter, 82 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:40,056 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 501 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:05:40,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15139 states. [2022-02-11 00:05:40,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15139 to 14813. [2022-02-11 00:05:40,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14813 states, 14812 states have (on average 3.7248177153659197) internal successors, (55172), 14812 states have internal predecessors, (55172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:40,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14813 states to 14813 states and 55172 transitions. [2022-02-11 00:05:40,454 INFO L78 Accepts]: Start accepts. Automaton has 14813 states and 55172 transitions. Word has length 27 [2022-02-11 00:05:40,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:40,454 INFO L470 AbstractCegarLoop]: Abstraction has 14813 states and 55172 transitions. [2022-02-11 00:05:40,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 14813 states and 55172 transitions. [2022-02-11 00:05:40,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:05:40,482 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:40,482 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:40,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-02-11 00:05:40,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-11 00:05:40,683 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:40,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:40,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1777023434, now seen corresponding path program 31 times [2022-02-11 00:05:40,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:40,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938437127] [2022-02-11 00:05:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:40,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:40,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:40,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938437127] [2022-02-11 00:05:40,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938437127] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:40,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686929910] [2022-02-11 00:05:40,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:05:40,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:40,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:40,762 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:40,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-11 00:05:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:40,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:05:40,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:41,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:41,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686929910] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:41,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:41,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-11 00:05:41,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131748736] [2022-02-11 00:05:41,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:41,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:05:41,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:41,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:05:41,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:41,195 INFO L87 Difference]: Start difference. First operand 14813 states and 55172 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:41,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:41,563 INFO L93 Difference]: Finished difference Result 15596 states and 57493 transitions. [2022-02-11 00:05:41,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:05:41,563 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:05:41,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:41,607 INFO L225 Difference]: With dead ends: 15596 [2022-02-11 00:05:41,607 INFO L226 Difference]: Without dead ends: 15566 [2022-02-11 00:05:41,607 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:41,607 INFO L934 BasicCegarLoop]: 60 mSDtfsCounter, 95 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:41,607 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 566 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:05:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15566 states. [2022-02-11 00:05:41,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15566 to 14939. [2022-02-11 00:05:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14939 states, 14938 states have (on average 3.7268710670772527) internal successors, (55672), 14938 states have internal predecessors, (55672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14939 states to 14939 states and 55672 transitions. [2022-02-11 00:05:42,070 INFO L78 Accepts]: Start accepts. Automaton has 14939 states and 55672 transitions. Word has length 27 [2022-02-11 00:05:42,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:42,070 INFO L470 AbstractCegarLoop]: Abstraction has 14939 states and 55672 transitions. [2022-02-11 00:05:42,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 14939 states and 55672 transitions. [2022-02-11 00:05:42,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:05:42,107 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:42,107 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:42,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-02-11 00:05:42,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-02-11 00:05:42,308 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:42,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:42,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1260332730, now seen corresponding path program 32 times [2022-02-11 00:05:42,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:42,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349468152] [2022-02-11 00:05:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:42,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:42,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:42,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349468152] [2022-02-11 00:05:42,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349468152] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:42,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578955281] [2022-02-11 00:05:42,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:05:42,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:42,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:42,396 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:42,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-11 00:05:42,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:05:42,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:42,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:05:42,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:42,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:42,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578955281] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:42,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:42,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-11 00:05:42,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021977309] [2022-02-11 00:05:42,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:42,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:05:42,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:42,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:05:42,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:42,787 INFO L87 Difference]: Start difference. First operand 14939 states and 55672 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:43,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:43,046 INFO L93 Difference]: Finished difference Result 15554 states and 57492 transitions. [2022-02-11 00:05:43,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:05:43,046 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:05:43,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:43,092 INFO L225 Difference]: With dead ends: 15554 [2022-02-11 00:05:43,092 INFO L226 Difference]: Without dead ends: 15466 [2022-02-11 00:05:43,092 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:43,092 INFO L934 BasicCegarLoop]: 54 mSDtfsCounter, 68 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:43,093 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 512 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:05:43,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15466 states. [2022-02-11 00:05:43,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15466 to 15165. [2022-02-11 00:05:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15165 states, 15164 states have (on average 3.7211158005803218) internal successors, (56427), 15164 states have internal predecessors, (56427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15165 states to 15165 states and 56427 transitions. [2022-02-11 00:05:43,524 INFO L78 Accepts]: Start accepts. Automaton has 15165 states and 56427 transitions. Word has length 27 [2022-02-11 00:05:43,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:43,524 INFO L470 AbstractCegarLoop]: Abstraction has 15165 states and 56427 transitions. [2022-02-11 00:05:43,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 15165 states and 56427 transitions. [2022-02-11 00:05:43,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:05:43,557 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:43,557 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:43,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-11 00:05:43,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:43,758 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:43,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:43,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1455016062, now seen corresponding path program 33 times [2022-02-11 00:05:43,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:43,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023842279] [2022-02-11 00:05:43,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:43,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:43,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:43,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023842279] [2022-02-11 00:05:43,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023842279] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:43,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788524433] [2022-02-11 00:05:43,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:05:43,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:43,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:43,845 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:43,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-11 00:05:43,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-11 00:05:43,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:43,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:05:43,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:44,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:44,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788524433] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:44,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:44,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2022-02-11 00:05:44,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102974949] [2022-02-11 00:05:44,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:44,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:05:44,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:44,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:05:44,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:05:44,261 INFO L87 Difference]: Start difference. First operand 15165 states and 56427 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:44,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:44,594 INFO L93 Difference]: Finished difference Result 17763 states and 64869 transitions. [2022-02-11 00:05:44,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:05:44,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:05:44,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:44,808 INFO L225 Difference]: With dead ends: 17763 [2022-02-11 00:05:44,809 INFO L226 Difference]: Without dead ends: 17647 [2022-02-11 00:05:44,809 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:05:44,815 INFO L934 BasicCegarLoop]: 79 mSDtfsCounter, 105 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:44,815 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 678 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:05:44,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17647 states. [2022-02-11 00:05:45,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17647 to 16074. [2022-02-11 00:05:45,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16074 states, 16073 states have (on average 3.7375101101225656) internal successors, (60073), 16073 states have internal predecessors, (60073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:45,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16074 states to 16074 states and 60073 transitions. [2022-02-11 00:05:45,281 INFO L78 Accepts]: Start accepts. Automaton has 16074 states and 60073 transitions. Word has length 27 [2022-02-11 00:05:45,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:45,281 INFO L470 AbstractCegarLoop]: Abstraction has 16074 states and 60073 transitions. [2022-02-11 00:05:45,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:45,282 INFO L276 IsEmpty]: Start isEmpty. Operand 16074 states and 60073 transitions. [2022-02-11 00:05:45,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:05:45,315 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:45,315 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:45,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:45,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-02-11 00:05:45,516 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:45,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:45,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1151333050, now seen corresponding path program 34 times [2022-02-11 00:05:45,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:45,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759962683] [2022-02-11 00:05:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:45,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:45,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:45,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759962683] [2022-02-11 00:05:45,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759962683] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:45,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972320455] [2022-02-11 00:05:45,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:05:45,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:45,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:45,595 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:45,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-11 00:05:45,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:05:45,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:45,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:05:45,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:45,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:45,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972320455] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:45,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:45,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-11 00:05:45,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146056943] [2022-02-11 00:05:45,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:45,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:05:45,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:45,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:05:45,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:45,980 INFO L87 Difference]: Start difference. First operand 16074 states and 60073 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:46,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:46,281 INFO L93 Difference]: Finished difference Result 16809 states and 62274 transitions. [2022-02-11 00:05:46,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:05:46,281 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:05:46,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:46,339 INFO L225 Difference]: With dead ends: 16809 [2022-02-11 00:05:46,339 INFO L226 Difference]: Without dead ends: 16719 [2022-02-11 00:05:46,339 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:46,340 INFO L934 BasicCegarLoop]: 60 mSDtfsCounter, 82 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:46,340 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 506 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:05:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16719 states. [2022-02-11 00:05:46,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16719 to 16310. [2022-02-11 00:05:46,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16310 states, 16309 states have (on average 3.7376295297075233) internal successors, (60957), 16309 states have internal predecessors, (60957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:47,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16310 states to 16310 states and 60957 transitions. [2022-02-11 00:05:47,009 INFO L78 Accepts]: Start accepts. Automaton has 16310 states and 60957 transitions. Word has length 27 [2022-02-11 00:05:47,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:47,009 INFO L470 AbstractCegarLoop]: Abstraction has 16310 states and 60957 transitions. [2022-02-11 00:05:47,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:47,009 INFO L276 IsEmpty]: Start isEmpty. Operand 16310 states and 60957 transitions. [2022-02-11 00:05:47,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:05:47,047 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:47,047 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:47,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-02-11 00:05:47,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:47,248 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:47,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1987580874, now seen corresponding path program 35 times [2022-02-11 00:05:47,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:47,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848204489] [2022-02-11 00:05:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:47,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:47,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:47,328 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:47,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848204489] [2022-02-11 00:05:47,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848204489] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:47,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297109684] [2022-02-11 00:05:47,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:05:47,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:47,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:47,330 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:47,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-11 00:05:47,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:05:47,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:47,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:05:47,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:47,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:05:47,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297109684] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:47,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:47,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-11 00:05:47,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86511625] [2022-02-11 00:05:47,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:47,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:05:47,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:47,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:05:47,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:47,701 INFO L87 Difference]: Start difference. First operand 16310 states and 60957 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:47,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:47,975 INFO L93 Difference]: Finished difference Result 17303 states and 63989 transitions. [2022-02-11 00:05:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:05:47,976 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:05:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:48,027 INFO L225 Difference]: With dead ends: 17303 [2022-02-11 00:05:48,027 INFO L226 Difference]: Without dead ends: 17273 [2022-02-11 00:05:48,028 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:48,028 INFO L934 BasicCegarLoop]: 66 mSDtfsCounter, 95 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:48,028 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 553 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:05:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17273 states. [2022-02-11 00:05:48,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17273 to 16496. [2022-02-11 00:05:48,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16496 states, 16495 states have (on average 3.7399818126705062) internal successors, (61691), 16495 states have internal predecessors, (61691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16496 states to 16496 states and 61691 transitions. [2022-02-11 00:05:48,590 INFO L78 Accepts]: Start accepts. Automaton has 16496 states and 61691 transitions. Word has length 27 [2022-02-11 00:05:48,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:48,590 INFO L470 AbstractCegarLoop]: Abstraction has 16496 states and 61691 transitions. [2022-02-11 00:05:48,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:48,590 INFO L276 IsEmpty]: Start isEmpty. Operand 16496 states and 61691 transitions. [2022-02-11 00:05:48,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:05:48,622 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:48,622 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:48,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-02-11 00:05:48,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-02-11 00:05:48,823 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:48,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:48,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1650438726, now seen corresponding path program 36 times [2022-02-11 00:05:48,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:48,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179894520] [2022-02-11 00:05:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:48,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:48,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:48,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179894520] [2022-02-11 00:05:48,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179894520] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:48,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029912847] [2022-02-11 00:05:48,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:05:48,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:48,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:48,909 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:48,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-11 00:05:48,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:05:48,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:48,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:05:48,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:49,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:49,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029912847] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:49,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:49,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-11 00:05:49,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796365048] [2022-02-11 00:05:49,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:49,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:05:49,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:49,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:05:49,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:49,345 INFO L87 Difference]: Start difference. First operand 16496 states and 61691 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:49,589 INFO L93 Difference]: Finished difference Result 17081 states and 63420 transitions. [2022-02-11 00:05:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:05:49,590 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:05:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:49,643 INFO L225 Difference]: With dead ends: 17081 [2022-02-11 00:05:49,643 INFO L226 Difference]: Without dead ends: 17015 [2022-02-11 00:05:49,643 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:49,644 INFO L934 BasicCegarLoop]: 54 mSDtfsCounter, 82 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:49,644 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 416 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:49,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17015 states. [2022-02-11 00:05:50,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17015 to 16690. [2022-02-11 00:05:50,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16690 states, 16689 states have (on average 3.7389897537300016) internal successors, (62400), 16689 states have internal predecessors, (62400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16690 states to 16690 states and 62400 transitions. [2022-02-11 00:05:50,144 INFO L78 Accepts]: Start accepts. Automaton has 16690 states and 62400 transitions. Word has length 27 [2022-02-11 00:05:50,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:50,144 INFO L470 AbstractCegarLoop]: Abstraction has 16690 states and 62400 transitions. [2022-02-11 00:05:50,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:50,144 INFO L276 IsEmpty]: Start isEmpty. Operand 16690 states and 62400 transitions. [2022-02-11 00:05:50,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:05:50,185 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:50,185 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:50,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-02-11 00:05:50,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-11 00:05:50,385 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:50,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:50,386 INFO L85 PathProgramCache]: Analyzing trace with hash -314976114, now seen corresponding path program 37 times [2022-02-11 00:05:50,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:50,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237755326] [2022-02-11 00:05:50,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:50,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:50,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:50,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237755326] [2022-02-11 00:05:50,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237755326] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:50,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735840323] [2022-02-11 00:05:50,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:05:50,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:50,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:50,483 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:50,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-11 00:05:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:50,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:05:50,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:50,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:50,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735840323] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:50,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:50,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-11 00:05:50,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713007795] [2022-02-11 00:05:50,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:50,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:05:50,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:50,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:05:50,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:50,900 INFO L87 Difference]: Start difference. First operand 16690 states and 62400 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:51,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:51,370 INFO L93 Difference]: Finished difference Result 17364 states and 64430 transitions. [2022-02-11 00:05:51,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:05:51,370 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:05:51,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:51,418 INFO L225 Difference]: With dead ends: 17364 [2022-02-11 00:05:51,418 INFO L226 Difference]: Without dead ends: 17298 [2022-02-11 00:05:51,418 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:51,419 INFO L934 BasicCegarLoop]: 62 mSDtfsCounter, 69 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:51,419 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 676 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:05:51,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17298 states. [2022-02-11 00:05:51,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17298 to 16904. [2022-02-11 00:05:51,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16904 states, 16903 states have (on average 3.7405194344199253) internal successors, (63226), 16903 states have internal predecessors, (63226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16904 states to 16904 states and 63226 transitions. [2022-02-11 00:05:51,816 INFO L78 Accepts]: Start accepts. Automaton has 16904 states and 63226 transitions. Word has length 27 [2022-02-11 00:05:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:51,816 INFO L470 AbstractCegarLoop]: Abstraction has 16904 states and 63226 transitions. [2022-02-11 00:05:51,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 16904 states and 63226 transitions. [2022-02-11 00:05:51,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:05:51,849 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:51,849 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:51,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-02-11 00:05:52,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-11 00:05:52,049 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:52,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:52,050 INFO L85 PathProgramCache]: Analyzing trace with hash 152422742, now seen corresponding path program 38 times [2022-02-11 00:05:52,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:52,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724478632] [2022-02-11 00:05:52,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:52,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:52,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:52,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724478632] [2022-02-11 00:05:52,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724478632] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:52,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018038617] [2022-02-11 00:05:52,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:05:52,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:52,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:52,134 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:52,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-11 00:05:52,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:05:52,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:52,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:05:52,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:52,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:52,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018038617] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:52,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:52,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-11 00:05:52,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432732653] [2022-02-11 00:05:52,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:52,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:05:52,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:52,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:05:52,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:52,496 INFO L87 Difference]: Start difference. First operand 16904 states and 63226 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:52,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:52,891 INFO L93 Difference]: Finished difference Result 17887 states and 66224 transitions. [2022-02-11 00:05:52,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:05:52,892 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:05:52,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:52,945 INFO L225 Difference]: With dead ends: 17887 [2022-02-11 00:05:52,945 INFO L226 Difference]: Without dead ends: 17857 [2022-02-11 00:05:52,945 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:52,946 INFO L934 BasicCegarLoop]: 66 mSDtfsCounter, 90 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:52,946 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 558 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:05:52,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17857 states. [2022-02-11 00:05:53,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17857 to 17061. [2022-02-11 00:05:53,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17061 states, 17060 states have (on average 3.7441383352872215) internal successors, (63875), 17060 states have internal predecessors, (63875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17061 states to 17061 states and 63875 transitions. [2022-02-11 00:05:53,431 INFO L78 Accepts]: Start accepts. Automaton has 17061 states and 63875 transitions. Word has length 27 [2022-02-11 00:05:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:53,431 INFO L470 AbstractCegarLoop]: Abstraction has 17061 states and 63875 transitions. [2022-02-11 00:05:53,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 17061 states and 63875 transitions. [2022-02-11 00:05:53,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:05:53,467 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:53,467 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:53,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-02-11 00:05:53,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-02-11 00:05:53,668 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:53,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:53,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1017639438, now seen corresponding path program 39 times [2022-02-11 00:05:53,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:53,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634889491] [2022-02-11 00:05:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:53,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:05:53,749 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:53,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634889491] [2022-02-11 00:05:53,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634889491] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:53,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910619253] [2022-02-11 00:05:53,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:05:53,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:53,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:53,751 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:53,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-11 00:05:53,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:05:53,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:53,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:05:53,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:54,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:05:54,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910619253] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:54,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:54,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-11 00:05:54,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375413967] [2022-02-11 00:05:54,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:54,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:05:54,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:54,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:05:54,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:54,154 INFO L87 Difference]: Start difference. First operand 17061 states and 63875 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:54,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:54,611 INFO L93 Difference]: Finished difference Result 18468 states and 68107 transitions. [2022-02-11 00:05:54,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:05:54,611 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:05:54,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:54,659 INFO L225 Difference]: With dead ends: 18468 [2022-02-11 00:05:54,659 INFO L226 Difference]: Without dead ends: 18406 [2022-02-11 00:05:54,659 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:54,660 INFO L934 BasicCegarLoop]: 70 mSDtfsCounter, 89 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:54,660 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 586 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:05:54,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18406 states. [2022-02-11 00:05:55,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18406 to 17337. [2022-02-11 00:05:55,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17337 states, 17336 states have (on average 3.749134748500231) internal successors, (64995), 17336 states have internal predecessors, (64995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17337 states to 17337 states and 64995 transitions. [2022-02-11 00:05:55,109 INFO L78 Accepts]: Start accepts. Automaton has 17337 states and 64995 transitions. Word has length 27 [2022-02-11 00:05:55,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:55,109 INFO L470 AbstractCegarLoop]: Abstraction has 17337 states and 64995 transitions. [2022-02-11 00:05:55,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:55,109 INFO L276 IsEmpty]: Start isEmpty. Operand 17337 states and 64995 transitions. [2022-02-11 00:05:55,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:05:55,144 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:55,145 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:55,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-02-11 00:05:55,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-02-11 00:05:55,345 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:55,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:55,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2082462406, now seen corresponding path program 40 times [2022-02-11 00:05:55,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:55,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418765639] [2022-02-11 00:05:55,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:55,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:55,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:55,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418765639] [2022-02-11 00:05:55,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418765639] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:55,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293117784] [2022-02-11 00:05:55,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:05:55,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:55,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:55,452 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:55,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-11 00:05:55,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:05:55,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:55,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:05:55,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:55,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:55,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293117784] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:55,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:55,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-11 00:05:55,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572956174] [2022-02-11 00:05:55,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:55,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:05:55,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:55,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:05:55,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:55,873 INFO L87 Difference]: Start difference. First operand 17337 states and 64995 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:56,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:56,369 INFO L93 Difference]: Finished difference Result 18221 states and 67611 transitions. [2022-02-11 00:05:56,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:05:56,370 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:05:56,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:56,427 INFO L225 Difference]: With dead ends: 18221 [2022-02-11 00:05:56,427 INFO L226 Difference]: Without dead ends: 18191 [2022-02-11 00:05:56,428 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:56,428 INFO L934 BasicCegarLoop]: 60 mSDtfsCounter, 90 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:56,428 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 712 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:05:56,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18191 states. [2022-02-11 00:05:56,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18191 to 17491. [2022-02-11 00:05:56,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17491 states, 17490 states have (on average 3.750371640937679) internal successors, (65594), 17490 states have internal predecessors, (65594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:56,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17491 states to 17491 states and 65594 transitions. [2022-02-11 00:05:56,926 INFO L78 Accepts]: Start accepts. Automaton has 17491 states and 65594 transitions. Word has length 27 [2022-02-11 00:05:56,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:56,926 INFO L470 AbstractCegarLoop]: Abstraction has 17491 states and 65594 transitions. [2022-02-11 00:05:56,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:56,927 INFO L276 IsEmpty]: Start isEmpty. Operand 17491 states and 65594 transitions. [2022-02-11 00:05:56,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:05:56,968 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:56,968 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:56,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-02-11 00:05:57,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-11 00:05:57,169 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:57,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:57,169 INFO L85 PathProgramCache]: Analyzing trace with hash -783265718, now seen corresponding path program 41 times [2022-02-11 00:05:57,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:57,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976887172] [2022-02-11 00:05:57,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:57,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:57,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:57,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976887172] [2022-02-11 00:05:57,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976887172] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:57,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367983543] [2022-02-11 00:05:57,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:05:57,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:57,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:57,251 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:57,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-11 00:05:57,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:05:57,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:57,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:05:57,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:57,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:57,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367983543] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:57,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:57,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-11 00:05:57,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811017414] [2022-02-11 00:05:57,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:57,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:05:57,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:57,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:05:57,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:57,667 INFO L87 Difference]: Start difference. First operand 17491 states and 65594 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:58,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:58,026 INFO L93 Difference]: Finished difference Result 18204 states and 67682 transitions. [2022-02-11 00:05:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:05:58,027 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:05:58,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:58,227 INFO L225 Difference]: With dead ends: 18204 [2022-02-11 00:05:58,227 INFO L226 Difference]: Without dead ends: 18099 [2022-02-11 00:05:58,227 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:05:58,227 INFO L934 BasicCegarLoop]: 64 mSDtfsCounter, 88 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:58,227 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 630 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:05:58,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18099 states. [2022-02-11 00:05:58,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18099 to 17688. [2022-02-11 00:05:58,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17688 states, 17687 states have (on average 3.748289704302595) internal successors, (66296), 17687 states have internal predecessors, (66296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17688 states to 17688 states and 66296 transitions. [2022-02-11 00:05:58,716 INFO L78 Accepts]: Start accepts. Automaton has 17688 states and 66296 transitions. Word has length 27 [2022-02-11 00:05:58,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:58,716 INFO L470 AbstractCegarLoop]: Abstraction has 17688 states and 66296 transitions. [2022-02-11 00:05:58,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:58,716 INFO L276 IsEmpty]: Start isEmpty. Operand 17688 states and 66296 transitions. [2022-02-11 00:05:58,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:05:58,755 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:58,755 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:58,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:58,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-02-11 00:05:58,956 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:05:58,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:58,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1705053426, now seen corresponding path program 42 times [2022-02-11 00:05:58,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:58,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670828762] [2022-02-11 00:05:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:58,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:59,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:59,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670828762] [2022-02-11 00:05:59,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670828762] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:59,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040173245] [2022-02-11 00:05:59,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:05:59,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:59,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:59,052 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:05:59,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-11 00:05:59,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:05:59,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:59,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:05:59,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:59,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:59,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040173245] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:59,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:59,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2022-02-11 00:05:59,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182619679] [2022-02-11 00:05:59,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:59,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:05:59,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:59,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:05:59,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:05:59,522 INFO L87 Difference]: Start difference. First operand 17688 states and 66296 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:59,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:59,980 INFO L93 Difference]: Finished difference Result 20124 states and 73900 transitions. [2022-02-11 00:05:59,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:05:59,981 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:05:59,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:00,036 INFO L225 Difference]: With dead ends: 20124 [2022-02-11 00:06:00,036 INFO L226 Difference]: Without dead ends: 20072 [2022-02-11 00:06:00,036 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:06:00,037 INFO L934 BasicCegarLoop]: 85 mSDtfsCounter, 113 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:00,037 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 933 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:06:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20072 states. [2022-02-11 00:06:00,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20072 to 18185. [2022-02-11 00:06:00,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18185 states, 18184 states have (on average 3.7596238451385835) internal successors, (68365), 18184 states have internal predecessors, (68365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18185 states to 18185 states and 68365 transitions. [2022-02-11 00:06:00,506 INFO L78 Accepts]: Start accepts. Automaton has 18185 states and 68365 transitions. Word has length 27 [2022-02-11 00:06:00,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:00,506 INFO L470 AbstractCegarLoop]: Abstraction has 18185 states and 68365 transitions. [2022-02-11 00:06:00,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:00,507 INFO L276 IsEmpty]: Start isEmpty. Operand 18185 states and 68365 transitions. [2022-02-11 00:06:00,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:00,541 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:00,541 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:00,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-02-11 00:06:00,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:00,742 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:00,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash 469214414, now seen corresponding path program 43 times [2022-02-11 00:06:00,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:00,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485656707] [2022-02-11 00:06:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:00,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:00,929 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:00,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485656707] [2022-02-11 00:06:00,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485656707] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:00,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229873533] [2022-02-11 00:06:00,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:06:00,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:00,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:00,932 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:00,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-11 00:06:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:00,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:00,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:01,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:01,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229873533] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:01,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:01,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2022-02-11 00:06:01,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544340792] [2022-02-11 00:06:01,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:01,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:06:01,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:01,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:06:01,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:06:01,384 INFO L87 Difference]: Start difference. First operand 18185 states and 68365 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:01,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:01,754 INFO L93 Difference]: Finished difference Result 18966 states and 70681 transitions. [2022-02-11 00:06:01,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:06:01,755 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:01,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:01,818 INFO L225 Difference]: With dead ends: 18966 [2022-02-11 00:06:01,818 INFO L226 Difference]: Without dead ends: 18936 [2022-02-11 00:06:01,818 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:06:01,818 INFO L934 BasicCegarLoop]: 58 mSDtfsCounter, 98 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:01,819 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 504 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:06:01,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18936 states. [2022-02-11 00:06:02,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18936 to 18308. [2022-02-11 00:06:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18308 states, 18307 states have (on average 3.760692631233954) internal successors, (68847), 18307 states have internal predecessors, (68847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18308 states to 18308 states and 68847 transitions. [2022-02-11 00:06:02,351 INFO L78 Accepts]: Start accepts. Automaton has 18308 states and 68847 transitions. Word has length 27 [2022-02-11 00:06:02,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:02,351 INFO L470 AbstractCegarLoop]: Abstraction has 18308 states and 68847 transitions. [2022-02-11 00:06:02,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 18308 states and 68847 transitions. [2022-02-11 00:06:02,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:02,390 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:02,390 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:02,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-02-11 00:06:02,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-02-11 00:06:02,592 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:02,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:02,592 INFO L85 PathProgramCache]: Analyzing trace with hash 475835066, now seen corresponding path program 44 times [2022-02-11 00:06:02,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:02,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265632633] [2022-02-11 00:06:02,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:02,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:02,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:02,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265632633] [2022-02-11 00:06:02,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265632633] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:02,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531799976] [2022-02-11 00:06:02,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:06:02,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:02,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:02,683 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:02,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-11 00:06:02,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:06:02,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:02,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:02,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:02,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:02,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:03,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531799976] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:03,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:03,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2022-02-11 00:06:03,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326851035] [2022-02-11 00:06:03,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:03,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:06:03,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:03,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:06:03,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:06:03,042 INFO L87 Difference]: Start difference. First operand 18308 states and 68847 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:03,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:03,467 INFO L93 Difference]: Finished difference Result 18865 states and 70515 transitions. [2022-02-11 00:06:03,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:06:03,467 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:03,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:03,517 INFO L225 Difference]: With dead ends: 18865 [2022-02-11 00:06:03,517 INFO L226 Difference]: Without dead ends: 18797 [2022-02-11 00:06:03,517 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:06:03,518 INFO L934 BasicCegarLoop]: 62 mSDtfsCounter, 67 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:03,518 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 566 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:06:03,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18797 states. [2022-02-11 00:06:03,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18797 to 18476. [2022-02-11 00:06:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18476 states, 18475 states have (on average 3.7612449255751015) internal successors, (69489), 18475 states have internal predecessors, (69489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18476 states to 18476 states and 69489 transitions. [2022-02-11 00:06:04,000 INFO L78 Accepts]: Start accepts. Automaton has 18476 states and 69489 transitions. Word has length 27 [2022-02-11 00:06:04,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:04,001 INFO L470 AbstractCegarLoop]: Abstraction has 18476 states and 69489 transitions. [2022-02-11 00:06:04,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand 18476 states and 69489 transitions. [2022-02-11 00:06:04,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:04,034 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:04,034 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:04,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-11 00:06:04,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:04,234 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:04,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:04,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1506518146, now seen corresponding path program 45 times [2022-02-11 00:06:04,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:04,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886723763] [2022-02-11 00:06:04,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:04,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:04,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:04,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:04,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886723763] [2022-02-11 00:06:04,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886723763] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:04,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903750495] [2022-02-11 00:06:04,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:06:04,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:04,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:04,328 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:04,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-11 00:06:04,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:06:04,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:04,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:04,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:04,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:06:04,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903750495] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:04,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:04,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 00:06:04,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881078119] [2022-02-11 00:06:04,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:04,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:06:04,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:04,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:06:04,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:06:04,727 INFO L87 Difference]: Start difference. First operand 18476 states and 69489 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:05,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:05,210 INFO L93 Difference]: Finished difference Result 20566 states and 75847 transitions. [2022-02-11 00:06:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:06:05,210 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:05,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:05,273 INFO L225 Difference]: With dead ends: 20566 [2022-02-11 00:06:05,273 INFO L226 Difference]: Without dead ends: 20536 [2022-02-11 00:06:05,273 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:06:05,273 INFO L934 BasicCegarLoop]: 91 mSDtfsCounter, 103 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:05,273 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 1067 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:06:05,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20536 states. [2022-02-11 00:06:05,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20536 to 18884. [2022-02-11 00:06:05,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18884 states, 18883 states have (on average 3.769157443202881) internal successors, (71173), 18883 states have internal predecessors, (71173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:05,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18884 states to 18884 states and 71173 transitions. [2022-02-11 00:06:05,979 INFO L78 Accepts]: Start accepts. Automaton has 18884 states and 71173 transitions. Word has length 27 [2022-02-11 00:06:05,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:05,979 INFO L470 AbstractCegarLoop]: Abstraction has 18884 states and 71173 transitions. [2022-02-11 00:06:05,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:05,979 INFO L276 IsEmpty]: Start isEmpty. Operand 18884 states and 71173 transitions. [2022-02-11 00:06:06,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:06,017 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:06,017 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:06,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-02-11 00:06:06,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:06,220 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:06,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:06,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1512496010, now seen corresponding path program 46 times [2022-02-11 00:06:06,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:06,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258762880] [2022-02-11 00:06:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:06,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:06,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:06,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258762880] [2022-02-11 00:06:06,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258762880] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:06,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043965690] [2022-02-11 00:06:06,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:06:06,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:06,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:06,325 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:06,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-11 00:06:06,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:06:06,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:06,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:06,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:06,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:06,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043965690] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:06,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:06,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2022-02-11 00:06:06,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586501881] [2022-02-11 00:06:06,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:06,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:06:06,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:06,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:06:06,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:06:06,755 INFO L87 Difference]: Start difference. First operand 18884 states and 71173 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:07,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:07,161 INFO L93 Difference]: Finished difference Result 19698 states and 73472 transitions. [2022-02-11 00:06:07,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:06:07,161 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:07,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:07,225 INFO L225 Difference]: With dead ends: 19698 [2022-02-11 00:06:07,225 INFO L226 Difference]: Without dead ends: 19642 [2022-02-11 00:06:07,225 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:06:07,225 INFO L934 BasicCegarLoop]: 58 mSDtfsCounter, 99 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:07,226 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 542 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:06:07,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19642 states. [2022-02-11 00:06:07,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19642 to 19076. [2022-02-11 00:06:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19076 states, 19075 states have (on average 3.769908256880734) internal successors, (71911), 19075 states have internal predecessors, (71911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:07,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19076 states to 19076 states and 71911 transitions. [2022-02-11 00:06:07,730 INFO L78 Accepts]: Start accepts. Automaton has 19076 states and 71911 transitions. Word has length 27 [2022-02-11 00:06:07,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:07,731 INFO L470 AbstractCegarLoop]: Abstraction has 19076 states and 71911 transitions. [2022-02-11 00:06:07,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:07,731 INFO L276 IsEmpty]: Start isEmpty. Operand 19076 states and 71911 transitions. [2022-02-11 00:06:07,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:07,773 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:07,773 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:07,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-02-11 00:06:07,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-02-11 00:06:07,974 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:07,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:07,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1415860474, now seen corresponding path program 47 times [2022-02-11 00:06:07,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:07,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978112998] [2022-02-11 00:06:07,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:07,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:08,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:08,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978112998] [2022-02-11 00:06:08,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978112998] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:08,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122356342] [2022-02-11 00:06:08,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:06:08,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:08,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:08,061 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:08,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-11 00:06:08,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:06:08,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:08,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:08,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:08,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:06:08,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122356342] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:08,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:08,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2022-02-11 00:06:08,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049384354] [2022-02-11 00:06:08,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:08,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:06:08,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:08,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:06:08,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:06:08,567 INFO L87 Difference]: Start difference. First operand 19076 states and 71911 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:08,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:08,971 INFO L93 Difference]: Finished difference Result 20110 states and 75050 transitions. [2022-02-11 00:06:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:06:08,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:08,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:09,035 INFO L225 Difference]: With dead ends: 20110 [2022-02-11 00:06:09,036 INFO L226 Difference]: Without dead ends: 20080 [2022-02-11 00:06:09,036 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:06:09,036 INFO L934 BasicCegarLoop]: 64 mSDtfsCounter, 94 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:09,036 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 628 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:06:09,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20080 states. [2022-02-11 00:06:09,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20080 to 19275. [2022-02-11 00:06:09,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19275 states, 19274 states have (on average 3.7716094220193006) internal successors, (72694), 19274 states have internal predecessors, (72694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:09,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19275 states to 19275 states and 72694 transitions. [2022-02-11 00:06:09,598 INFO L78 Accepts]: Start accepts. Automaton has 19275 states and 72694 transitions. Word has length 27 [2022-02-11 00:06:09,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:09,598 INFO L470 AbstractCegarLoop]: Abstraction has 19275 states and 72694 transitions. [2022-02-11 00:06:09,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:09,598 INFO L276 IsEmpty]: Start isEmpty. Operand 19275 states and 72694 transitions. [2022-02-11 00:06:09,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:09,645 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:09,645 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:09,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-02-11 00:06:09,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-02-11 00:06:09,846 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:09,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:09,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1723053450, now seen corresponding path program 48 times [2022-02-11 00:06:09,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:09,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379614256] [2022-02-11 00:06:09,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:09,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:09,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:09,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379614256] [2022-02-11 00:06:09,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379614256] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:09,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274134903] [2022-02-11 00:06:09,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:06:09,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:09,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:09,948 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:09,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-11 00:06:09,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:06:09,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:09,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:09,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:10,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:06:10,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274134903] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:10,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:10,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2022-02-11 00:06:10,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864817862] [2022-02-11 00:06:10,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:10,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:06:10,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:10,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:06:10,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:06:10,316 INFO L87 Difference]: Start difference. First operand 19275 states and 72694 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:10,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:10,775 INFO L93 Difference]: Finished difference Result 20326 states and 75853 transitions. [2022-02-11 00:06:10,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:06:10,776 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:10,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:10,833 INFO L225 Difference]: With dead ends: 20326 [2022-02-11 00:06:10,833 INFO L226 Difference]: Without dead ends: 20231 [2022-02-11 00:06:10,833 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:06:10,833 INFO L934 BasicCegarLoop]: 64 mSDtfsCounter, 96 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:10,834 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 599 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:06:10,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20231 states. [2022-02-11 00:06:11,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20231 to 19566. [2022-02-11 00:06:11,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19566 states, 19565 states have (on average 3.773115256836187) internal successors, (73821), 19565 states have internal predecessors, (73821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:11,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19566 states to 19566 states and 73821 transitions. [2022-02-11 00:06:11,398 INFO L78 Accepts]: Start accepts. Automaton has 19566 states and 73821 transitions. Word has length 27 [2022-02-11 00:06:11,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:11,399 INFO L470 AbstractCegarLoop]: Abstraction has 19566 states and 73821 transitions. [2022-02-11 00:06:11,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:11,399 INFO L276 IsEmpty]: Start isEmpty. Operand 19566 states and 73821 transitions. [2022-02-11 00:06:11,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:11,445 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:11,446 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:11,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-02-11 00:06:11,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-02-11 00:06:11,646 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:11,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:11,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1507328886, now seen corresponding path program 49 times [2022-02-11 00:06:11,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:11,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831636444] [2022-02-11 00:06:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:11,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:11,747 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:11,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831636444] [2022-02-11 00:06:11,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831636444] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:11,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081308261] [2022-02-11 00:06:11,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:06:11,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:11,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:11,749 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:11,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-11 00:06:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:11,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:11,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:12,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:12,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081308261] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:12,144 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:12,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2022-02-11 00:06:12,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311701373] [2022-02-11 00:06:12,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:12,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:06:12,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:12,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:06:12,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:06:12,145 INFO L87 Difference]: Start difference. First operand 19566 states and 73821 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:12,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:12,518 INFO L93 Difference]: Finished difference Result 21303 states and 79083 transitions. [2022-02-11 00:06:12,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:06:12,518 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:12,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:12,743 INFO L225 Difference]: With dead ends: 21303 [2022-02-11 00:06:12,743 INFO L226 Difference]: Without dead ends: 21255 [2022-02-11 00:06:12,744 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:06:12,744 INFO L934 BasicCegarLoop]: 87 mSDtfsCounter, 112 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:12,744 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 672 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:06:12,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21255 states. [2022-02-11 00:06:13,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21255 to 19994. [2022-02-11 00:06:13,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19994 states, 19993 states have (on average 3.77492122242785) internal successors, (75472), 19993 states have internal predecessors, (75472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:13,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19994 states to 19994 states and 75472 transitions. [2022-02-11 00:06:13,342 INFO L78 Accepts]: Start accepts. Automaton has 19994 states and 75472 transitions. Word has length 27 [2022-02-11 00:06:13,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:13,342 INFO L470 AbstractCegarLoop]: Abstraction has 19994 states and 75472 transitions. [2022-02-11 00:06:13,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:13,342 INFO L276 IsEmpty]: Start isEmpty. Operand 19994 states and 75472 transitions. [2022-02-11 00:06:13,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:13,387 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:13,387 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:13,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-02-11 00:06:13,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-11 00:06:13,589 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:13,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1829336258, now seen corresponding path program 50 times [2022-02-11 00:06:13,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:13,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362107395] [2022-02-11 00:06:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:13,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:13,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:13,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362107395] [2022-02-11 00:06:13,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362107395] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:13,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435076924] [2022-02-11 00:06:13,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:06:13,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:13,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:13,695 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:13,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-11 00:06:13,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:06:13,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:13,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:13,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:13,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:06:14,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435076924] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:14,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:14,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 16 [2022-02-11 00:06:14,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942844646] [2022-02-11 00:06:14,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:14,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:06:14,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:14,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:06:14,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:06:14,117 INFO L87 Difference]: Start difference. First operand 19994 states and 75472 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:14,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:14,466 INFO L93 Difference]: Finished difference Result 21008 states and 78520 transitions. [2022-02-11 00:06:14,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:06:14,466 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:14,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:14,521 INFO L225 Difference]: With dead ends: 21008 [2022-02-11 00:06:14,521 INFO L226 Difference]: Without dead ends: 20978 [2022-02-11 00:06:14,521 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:06:14,521 INFO L934 BasicCegarLoop]: 58 mSDtfsCounter, 108 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:14,522 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 464 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:06:14,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20978 states. [2022-02-11 00:06:14,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20978 to 20240. [2022-02-11 00:06:14,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20240 states, 20239 states have (on average 3.7752853401847917) internal successors, (76408), 20239 states have internal predecessors, (76408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:15,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20240 states to 20240 states and 76408 transitions. [2022-02-11 00:06:15,193 INFO L78 Accepts]: Start accepts. Automaton has 20240 states and 76408 transitions. Word has length 27 [2022-02-11 00:06:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:15,193 INFO L470 AbstractCegarLoop]: Abstraction has 20240 states and 76408 transitions. [2022-02-11 00:06:15,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 20240 states and 76408 transitions. [2022-02-11 00:06:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:15,234 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:15,234 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:15,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-02-11 00:06:15,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-11 00:06:15,435 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:15,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:15,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1559770698, now seen corresponding path program 51 times [2022-02-11 00:06:15,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:15,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827533026] [2022-02-11 00:06:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:15,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:15,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:15,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827533026] [2022-02-11 00:06:15,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827533026] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:15,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590752480] [2022-02-11 00:06:15,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:06:15,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:15,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:15,552 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:15,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-11 00:06:15,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:06:15,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:15,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:15,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:15,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:16,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590752480] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:16,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:16,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 17 [2022-02-11 00:06:16,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588703282] [2022-02-11 00:06:16,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:16,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:06:16,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:16,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:06:16,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:06:16,005 INFO L87 Difference]: Start difference. First operand 20240 states and 76408 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:16,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:16,425 INFO L93 Difference]: Finished difference Result 21252 states and 79458 transitions. [2022-02-11 00:06:16,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:06:16,425 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:16,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:16,483 INFO L225 Difference]: With dead ends: 21252 [2022-02-11 00:06:16,484 INFO L226 Difference]: Without dead ends: 21222 [2022-02-11 00:06:16,484 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:06:16,484 INFO L934 BasicCegarLoop]: 57 mSDtfsCounter, 97 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:16,484 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 598 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:06:16,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21222 states. [2022-02-11 00:06:16,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21222 to 20470. [2022-02-11 00:06:16,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20470 states, 20469 states have (on average 3.775660755288485) internal successors, (77284), 20469 states have internal predecessors, (77284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:17,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20470 states to 20470 states and 77284 transitions. [2022-02-11 00:06:17,041 INFO L78 Accepts]: Start accepts. Automaton has 20470 states and 77284 transitions. Word has length 27 [2022-02-11 00:06:17,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:17,041 INFO L470 AbstractCegarLoop]: Abstraction has 20470 states and 77284 transitions. [2022-02-11 00:06:17,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:17,042 INFO L276 IsEmpty]: Start isEmpty. Operand 20470 states and 77284 transitions. [2022-02-11 00:06:17,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:17,083 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:17,083 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:17,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-11 00:06:17,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:17,283 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:17,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:17,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1365087366, now seen corresponding path program 52 times [2022-02-11 00:06:17,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:17,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884488783] [2022-02-11 00:06:17,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:17,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:17,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:17,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884488783] [2022-02-11 00:06:17,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884488783] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:17,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139716595] [2022-02-11 00:06:17,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:06:17,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:17,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:17,516 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:17,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-11 00:06:17,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:06:17,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:17,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:17,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:17,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:06:18,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139716595] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:18,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:18,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 17 [2022-02-11 00:06:18,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976459256] [2022-02-11 00:06:18,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:18,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:06:18,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:18,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:06:18,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:06:18,002 INFO L87 Difference]: Start difference. First operand 20470 states and 77284 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:18,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:18,476 INFO L93 Difference]: Finished difference Result 21101 states and 79088 transitions. [2022-02-11 00:06:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:06:18,476 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:18,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:18,560 INFO L225 Difference]: With dead ends: 21101 [2022-02-11 00:06:18,560 INFO L226 Difference]: Without dead ends: 21003 [2022-02-11 00:06:18,560 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:06:18,561 INFO L934 BasicCegarLoop]: 51 mSDtfsCounter, 90 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:18,561 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 548 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:06:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21003 states. [2022-02-11 00:06:18,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21003 to 20668. [2022-02-11 00:06:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20668 states, 20667 states have (on average 3.772245608941791) internal successors, (77961), 20667 states have internal predecessors, (77961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:19,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20668 states to 20668 states and 77961 transitions. [2022-02-11 00:06:19,090 INFO L78 Accepts]: Start accepts. Automaton has 20668 states and 77961 transitions. Word has length 27 [2022-02-11 00:06:19,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:19,090 INFO L470 AbstractCegarLoop]: Abstraction has 20668 states and 77961 transitions. [2022-02-11 00:06:19,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:19,090 INFO L276 IsEmpty]: Start isEmpty. Operand 20668 states and 77961 transitions. [2022-02-11 00:06:19,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:19,132 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:19,132 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:19,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-02-11 00:06:19,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:19,333 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:19,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:19,333 INFO L85 PathProgramCache]: Analyzing trace with hash -564336006, now seen corresponding path program 53 times [2022-02-11 00:06:19,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:19,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210263883] [2022-02-11 00:06:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:19,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:19,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:19,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210263883] [2022-02-11 00:06:19,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210263883] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:19,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919345450] [2022-02-11 00:06:19,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:06:19,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:19,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:19,459 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:19,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-11 00:06:19,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:06:19,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:19,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:19,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:19,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:06:19,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919345450] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:19,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:19,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-02-11 00:06:19,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792348483] [2022-02-11 00:06:19,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:19,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:06:19,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:19,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:06:19,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:06:19,998 INFO L87 Difference]: Start difference. First operand 20668 states and 77961 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:20,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:20,634 INFO L93 Difference]: Finished difference Result 22401 states and 83279 transitions. [2022-02-11 00:06:20,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:06:20,635 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:20,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:20,692 INFO L225 Difference]: With dead ends: 22401 [2022-02-11 00:06:20,692 INFO L226 Difference]: Without dead ends: 22360 [2022-02-11 00:06:20,692 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:06:20,692 INFO L934 BasicCegarLoop]: 73 mSDtfsCounter, 119 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:20,693 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 944 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:06:20,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22360 states. [2022-02-11 00:06:21,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22360 to 21222. [2022-02-11 00:06:21,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21222 states, 21221 states have (on average 3.7722538994392347) internal successors, (80051), 21221 states have internal predecessors, (80051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:21,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21222 states to 21222 states and 80051 transitions. [2022-02-11 00:06:21,211 INFO L78 Accepts]: Start accepts. Automaton has 21222 states and 80051 transitions. Word has length 27 [2022-02-11 00:06:21,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:21,212 INFO L470 AbstractCegarLoop]: Abstraction has 21222 states and 80051 transitions. [2022-02-11 00:06:21,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:21,212 INFO L276 IsEmpty]: Start isEmpty. Operand 21222 states and 80051 transitions. [2022-02-11 00:06:21,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:21,251 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:21,251 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:21,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-02-11 00:06:21,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:21,454 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:21,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:21,454 INFO L85 PathProgramCache]: Analyzing trace with hash -543379962, now seen corresponding path program 54 times [2022-02-11 00:06:21,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:21,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842387376] [2022-02-11 00:06:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:21,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:21,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:21,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842387376] [2022-02-11 00:06:21,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842387376] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:21,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587973586] [2022-02-11 00:06:21,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:06:21,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:21,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:21,566 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:21,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-11 00:06:21,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:06:21,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:21,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:21,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:21,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:06:21,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587973586] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:21,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:21,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 16 [2022-02-11 00:06:21,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432913112] [2022-02-11 00:06:21,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:21,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:06:21,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:21,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:06:21,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:06:21,987 INFO L87 Difference]: Start difference. First operand 21222 states and 80051 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:22,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:22,552 INFO L93 Difference]: Finished difference Result 22034 states and 82438 transitions. [2022-02-11 00:06:22,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:06:22,552 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:22,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:22,624 INFO L225 Difference]: With dead ends: 22034 [2022-02-11 00:06:22,624 INFO L226 Difference]: Without dead ends: 21972 [2022-02-11 00:06:22,624 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:06:22,624 INFO L934 BasicCegarLoop]: 57 mSDtfsCounter, 84 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:22,624 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 625 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:06:22,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21972 states. [2022-02-11 00:06:23,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21972 to 21408. [2022-02-11 00:06:23,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21408 states, 21407 states have (on average 3.7745130097631616) internal successors, (80801), 21407 states have internal predecessors, (80801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21408 states to 21408 states and 80801 transitions. [2022-02-11 00:06:23,250 INFO L78 Accepts]: Start accepts. Automaton has 21408 states and 80801 transitions. Word has length 27 [2022-02-11 00:06:23,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:23,250 INFO L470 AbstractCegarLoop]: Abstraction has 21408 states and 80801 transitions. [2022-02-11 00:06:23,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:23,250 INFO L276 IsEmpty]: Start isEmpty. Operand 21408 states and 80801 transitions. [2022-02-11 00:06:23,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:23,297 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:23,297 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:23,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-11 00:06:23,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:23,498 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:23,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:23,498 INFO L85 PathProgramCache]: Analyzing trace with hash 904745286, now seen corresponding path program 55 times [2022-02-11 00:06:23,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:23,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168235290] [2022-02-11 00:06:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:23,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:23,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:23,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168235290] [2022-02-11 00:06:23,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168235290] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:23,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271327222] [2022-02-11 00:06:23,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:06:23,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:23,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:23,595 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:23,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-11 00:06:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:23,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:23,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:23,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:23,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271327222] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:23,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:23,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 17 [2022-02-11 00:06:23,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712350284] [2022-02-11 00:06:23,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:23,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:06:23,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:23,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:06:23,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:06:23,992 INFO L87 Difference]: Start difference. First operand 21408 states and 80801 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:24,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:24,376 INFO L93 Difference]: Finished difference Result 21975 states and 82472 transitions. [2022-02-11 00:06:24,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:06:24,377 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:24,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:24,442 INFO L225 Difference]: With dead ends: 21975 [2022-02-11 00:06:24,443 INFO L226 Difference]: Without dead ends: 21907 [2022-02-11 00:06:24,443 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:06:24,443 INFO L934 BasicCegarLoop]: 50 mSDtfsCounter, 74 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:24,443 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 606 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:06:24,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21907 states. [2022-02-11 00:06:24,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21907 to 21570. [2022-02-11 00:06:24,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21570 states, 21569 states have (on average 3.7743984422087253) internal successors, (81410), 21569 states have internal predecessors, (81410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:25,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21570 states to 21570 states and 81410 transitions. [2022-02-11 00:06:25,033 INFO L78 Accepts]: Start accepts. Automaton has 21570 states and 81410 transitions. Word has length 27 [2022-02-11 00:06:25,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:25,033 INFO L470 AbstractCegarLoop]: Abstraction has 21570 states and 81410 transitions. [2022-02-11 00:06:25,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:25,033 INFO L276 IsEmpty]: Start isEmpty. Operand 21570 states and 81410 transitions. [2022-02-11 00:06:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:25,234 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:25,234 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:25,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-11 00:06:25,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-11 00:06:25,435 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:25,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:25,436 INFO L85 PathProgramCache]: Analyzing trace with hash 392023814, now seen corresponding path program 56 times [2022-02-11 00:06:25,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:25,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365928288] [2022-02-11 00:06:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:25,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:25,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:25,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365928288] [2022-02-11 00:06:25,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365928288] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:25,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800295195] [2022-02-11 00:06:25,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:06:25,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:25,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:25,549 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:25,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-11 00:06:25,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:06:25,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:25,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:25,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:25,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:06:26,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800295195] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:26,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:26,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-02-11 00:06:26,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999754144] [2022-02-11 00:06:26,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:26,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:06:26,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:26,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:06:26,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:06:26,042 INFO L87 Difference]: Start difference. First operand 21570 states and 81410 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:26,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:26,640 INFO L93 Difference]: Finished difference Result 24163 states and 89788 transitions. [2022-02-11 00:06:26,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:06:26,640 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:26,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:26,713 INFO L225 Difference]: With dead ends: 24163 [2022-02-11 00:06:26,713 INFO L226 Difference]: Without dead ends: 24098 [2022-02-11 00:06:26,713 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:06:26,713 INFO L934 BasicCegarLoop]: 81 mSDtfsCounter, 115 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:26,714 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 1022 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:06:26,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24098 states. [2022-02-11 00:06:27,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24098 to 22358. [2022-02-11 00:06:27,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22358 states, 22357 states have (on average 3.7849443127432125) internal successors, (84620), 22357 states have internal predecessors, (84620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22358 states to 22358 states and 84620 transitions. [2022-02-11 00:06:27,357 INFO L78 Accepts]: Start accepts. Automaton has 22358 states and 84620 transitions. Word has length 27 [2022-02-11 00:06:27,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:27,358 INFO L470 AbstractCegarLoop]: Abstraction has 22358 states and 84620 transitions. [2022-02-11 00:06:27,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:27,358 INFO L276 IsEmpty]: Start isEmpty. Operand 22358 states and 84620 transitions. [2022-02-11 00:06:27,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:27,498 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:27,498 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:27,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-02-11 00:06:27,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-02-11 00:06:27,707 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:27,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:27,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1720511174, now seen corresponding path program 57 times [2022-02-11 00:06:27,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:27,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334343493] [2022-02-11 00:06:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:27,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:27,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:27,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334343493] [2022-02-11 00:06:27,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334343493] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:27,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396204781] [2022-02-11 00:06:27,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:06:27,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:27,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:27,813 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:27,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-11 00:06:27,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:06:27,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:27,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:27,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:28,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:06:28,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396204781] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:28,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:28,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2022-02-11 00:06:28,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091430332] [2022-02-11 00:06:28,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:28,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:06:28,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:28,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:06:28,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:06:28,216 INFO L87 Difference]: Start difference. First operand 22358 states and 84620 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:28,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:28,733 INFO L93 Difference]: Finished difference Result 23198 states and 87112 transitions. [2022-02-11 00:06:28,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:06:28,733 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:28,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:28,806 INFO L225 Difference]: With dead ends: 23198 [2022-02-11 00:06:28,806 INFO L226 Difference]: Without dead ends: 23168 [2022-02-11 00:06:28,807 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:06:28,807 INFO L934 BasicCegarLoop]: 55 mSDtfsCounter, 111 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:28,807 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 669 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:06:28,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23168 states. [2022-02-11 00:06:29,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23168 to 22488. [2022-02-11 00:06:29,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22488 states, 22487 states have (on average 3.785698403522035) internal successors, (85129), 22487 states have internal predecessors, (85129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:29,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22488 states to 22488 states and 85129 transitions. [2022-02-11 00:06:29,428 INFO L78 Accepts]: Start accepts. Automaton has 22488 states and 85129 transitions. Word has length 27 [2022-02-11 00:06:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:29,429 INFO L470 AbstractCegarLoop]: Abstraction has 22488 states and 85129 transitions. [2022-02-11 00:06:29,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:29,429 INFO L276 IsEmpty]: Start isEmpty. Operand 22488 states and 85129 transitions. [2022-02-11 00:06:29,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:29,480 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:29,481 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:29,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-02-11 00:06:29,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-02-11 00:06:29,681 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:29,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:29,682 INFO L85 PathProgramCache]: Analyzing trace with hash 974893574, now seen corresponding path program 58 times [2022-02-11 00:06:29,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:29,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61705504] [2022-02-11 00:06:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:29,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:29,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:29,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61705504] [2022-02-11 00:06:29,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61705504] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:29,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918180468] [2022-02-11 00:06:29,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:06:29,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:29,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:29,871 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:29,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-11 00:06:29,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:06:29,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:29,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:29,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:30,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:30,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918180468] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:30,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:30,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 00:06:30,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480959696] [2022-02-11 00:06:30,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:30,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:06:30,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:30,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:06:30,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:06:30,241 INFO L87 Difference]: Start difference. First operand 22488 states and 85129 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:30,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:30,771 INFO L93 Difference]: Finished difference Result 24712 states and 92130 transitions. [2022-02-11 00:06:30,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:06:30,771 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:30,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:30,864 INFO L225 Difference]: With dead ends: 24712 [2022-02-11 00:06:30,864 INFO L226 Difference]: Without dead ends: 24678 [2022-02-11 00:06:30,865 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:06:30,865 INFO L934 BasicCegarLoop]: 90 mSDtfsCounter, 108 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:30,865 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 892 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:06:30,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24678 states. [2022-02-11 00:06:31,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24678 to 23061. [2022-02-11 00:06:31,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23061 states, 23060 states have (on average 3.7935819601040763) internal successors, (87480), 23060 states have internal predecessors, (87480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:31,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23061 states to 23061 states and 87480 transitions. [2022-02-11 00:06:31,412 INFO L78 Accepts]: Start accepts. Automaton has 23061 states and 87480 transitions. Word has length 27 [2022-02-11 00:06:31,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:31,412 INFO L470 AbstractCegarLoop]: Abstraction has 23061 states and 87480 transitions. [2022-02-11 00:06:31,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 23061 states and 87480 transitions. [2022-02-11 00:06:31,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:31,457 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:31,457 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:31,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-02-11 00:06:31,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:31,657 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:31,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:31,658 INFO L85 PathProgramCache]: Analyzing trace with hash 612630986, now seen corresponding path program 59 times [2022-02-11 00:06:31,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:31,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949016126] [2022-02-11 00:06:31,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:31,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:31,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:31,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949016126] [2022-02-11 00:06:31,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949016126] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:31,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291456157] [2022-02-11 00:06:31,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:06:31,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:31,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:31,762 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:31,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-11 00:06:31,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:06:31,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:31,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:31,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:32,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:06:32,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291456157] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:32,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:32,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2022-02-11 00:06:32,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971936381] [2022-02-11 00:06:32,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:32,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:06:32,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:32,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:06:32,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:06:32,190 INFO L87 Difference]: Start difference. First operand 23061 states and 87480 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:32,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:32,631 INFO L93 Difference]: Finished difference Result 23923 states and 90023 transitions. [2022-02-11 00:06:32,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:06:32,631 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:32,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:32,719 INFO L225 Difference]: With dead ends: 23923 [2022-02-11 00:06:32,719 INFO L226 Difference]: Without dead ends: 23893 [2022-02-11 00:06:32,719 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:06:32,720 INFO L934 BasicCegarLoop]: 57 mSDtfsCounter, 110 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:32,720 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 529 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:06:32,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23893 states. [2022-02-11 00:06:33,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23893 to 23171. [2022-02-11 00:06:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23171 states, 23170 states have (on average 3.795338800172637) internal successors, (87938), 23170 states have internal predecessors, (87938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23171 states to 23171 states and 87938 transitions. [2022-02-11 00:06:33,267 INFO L78 Accepts]: Start accepts. Automaton has 23171 states and 87938 transitions. Word has length 27 [2022-02-11 00:06:33,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:33,268 INFO L470 AbstractCegarLoop]: Abstraction has 23171 states and 87938 transitions. [2022-02-11 00:06:33,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:33,268 INFO L276 IsEmpty]: Start isEmpty. Operand 23171 states and 87938 transitions. [2022-02-11 00:06:33,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:33,314 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:33,314 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:33,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-02-11 00:06:33,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:33,515 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:33,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:33,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1406917254, now seen corresponding path program 60 times [2022-02-11 00:06:33,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:33,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857967115] [2022-02-11 00:06:33,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:33,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:33,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:33,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857967115] [2022-02-11 00:06:33,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857967115] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:33,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321156441] [2022-02-11 00:06:33,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:06:33,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:33,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:33,615 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:33,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-11 00:06:33,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:06:33,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:33,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:33,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:33,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:33,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:06:34,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321156441] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:34,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:34,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2022-02-11 00:06:34,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759415243] [2022-02-11 00:06:34,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:34,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:06:34,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:34,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:06:34,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:06:34,012 INFO L87 Difference]: Start difference. First operand 23171 states and 87938 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:34,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:34,378 INFO L93 Difference]: Finished difference Result 23779 states and 89642 transitions. [2022-02-11 00:06:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:06:34,378 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:34,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:34,446 INFO L225 Difference]: With dead ends: 23779 [2022-02-11 00:06:34,446 INFO L226 Difference]: Without dead ends: 23729 [2022-02-11 00:06:34,446 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:06:34,447 INFO L934 BasicCegarLoop]: 51 mSDtfsCounter, 100 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:34,447 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 489 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:06:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23729 states. [2022-02-11 00:06:34,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23729 to 23331. [2022-02-11 00:06:34,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23331 states, 23330 states have (on average 3.794513501928847) internal successors, (88526), 23330 states have internal predecessors, (88526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23331 states to 23331 states and 88526 transitions. [2022-02-11 00:06:34,947 INFO L78 Accepts]: Start accepts. Automaton has 23331 states and 88526 transitions. Word has length 27 [2022-02-11 00:06:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:34,948 INFO L470 AbstractCegarLoop]: Abstraction has 23331 states and 88526 transitions. [2022-02-11 00:06:34,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 23331 states and 88526 transitions. [2022-02-11 00:06:34,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:34,998 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:34,998 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:35,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-02-11 00:06:35,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-11 00:06:35,198 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:35,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:35,199 INFO L85 PathProgramCache]: Analyzing trace with hash 798928522, now seen corresponding path program 61 times [2022-02-11 00:06:35,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:35,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742080584] [2022-02-11 00:06:35,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:35,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:35,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:35,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742080584] [2022-02-11 00:06:35,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742080584] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:35,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312260212] [2022-02-11 00:06:35,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:06:35,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:35,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:35,311 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:35,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-11 00:06:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:35,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:35,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:35,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:35,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312260212] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:35,728 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:35,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-02-11 00:06:35,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756913538] [2022-02-11 00:06:35,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:35,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:06:35,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:35,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:06:35,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:06:35,729 INFO L87 Difference]: Start difference. First operand 23331 states and 88526 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:36,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:36,185 INFO L93 Difference]: Finished difference Result 25647 states and 95754 transitions. [2022-02-11 00:06:36,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:06:36,185 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:36,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:36,269 INFO L225 Difference]: With dead ends: 25647 [2022-02-11 00:06:36,269 INFO L226 Difference]: Without dead ends: 25595 [2022-02-11 00:06:36,269 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:06:36,270 INFO L934 BasicCegarLoop]: 88 mSDtfsCounter, 115 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:36,270 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 766 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:06:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25595 states. [2022-02-11 00:06:36,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25595 to 23873. [2022-02-11 00:06:36,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23873 states, 23872 states have (on average 3.8009383378016084) internal successors, (90736), 23872 states have internal predecessors, (90736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:36,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23873 states to 23873 states and 90736 transitions. [2022-02-11 00:06:36,898 INFO L78 Accepts]: Start accepts. Automaton has 23873 states and 90736 transitions. Word has length 27 [2022-02-11 00:06:36,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:36,898 INFO L470 AbstractCegarLoop]: Abstraction has 23873 states and 90736 transitions. [2022-02-11 00:06:36,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:36,898 INFO L276 IsEmpty]: Start isEmpty. Operand 23873 states and 90736 transitions. [2022-02-11 00:06:36,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:36,945 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:36,945 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:36,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-11 00:06:37,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:37,146 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:37,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:37,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1773933906, now seen corresponding path program 62 times [2022-02-11 00:06:37,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:37,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162715766] [2022-02-11 00:06:37,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:37,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:37,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:37,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162715766] [2022-02-11 00:06:37,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162715766] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:37,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722225515] [2022-02-11 00:06:37,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:06:37,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:37,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:37,243 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:37,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-11 00:06:37,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:06:37,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:37,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:37,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:37,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:06:37,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722225515] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:37,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:37,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2022-02-11 00:06:37,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734406535] [2022-02-11 00:06:37,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:37,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:06:37,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:37,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:06:37,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:06:37,686 INFO L87 Difference]: Start difference. First operand 23873 states and 90736 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:38,209 INFO L93 Difference]: Finished difference Result 24766 states and 93367 transitions. [2022-02-11 00:06:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:06:38,209 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:38,300 INFO L225 Difference]: With dead ends: 24766 [2022-02-11 00:06:38,300 INFO L226 Difference]: Without dead ends: 24736 [2022-02-11 00:06:38,301 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:06:38,301 INFO L934 BasicCegarLoop]: 56 mSDtfsCounter, 108 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:38,301 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 596 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:06:38,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24736 states. [2022-02-11 00:06:38,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24736 to 23990. [2022-02-11 00:06:38,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23990 states, 23989 states have (on average 3.802742923840093) internal successors, (91224), 23989 states have internal predecessors, (91224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:38,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23990 states to 23990 states and 91224 transitions. [2022-02-11 00:06:38,856 INFO L78 Accepts]: Start accepts. Automaton has 23990 states and 91224 transitions. Word has length 27 [2022-02-11 00:06:38,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:38,856 INFO L470 AbstractCegarLoop]: Abstraction has 23990 states and 91224 transitions. [2022-02-11 00:06:38,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:38,857 INFO L276 IsEmpty]: Start isEmpty. Operand 23990 states and 91224 transitions. [2022-02-11 00:06:38,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:38,912 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:38,912 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:38,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-02-11 00:06:39,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:39,113 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:39,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:39,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1614694410, now seen corresponding path program 63 times [2022-02-11 00:06:39,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:39,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054723832] [2022-02-11 00:06:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:39,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:39,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:39,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054723832] [2022-02-11 00:06:39,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054723832] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:39,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763876475] [2022-02-11 00:06:39,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:06:39,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:39,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:39,224 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:39,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-11 00:06:39,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:06:39,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:39,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:39,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:39,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:06:39,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763876475] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:39,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:39,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2022-02-11 00:06:39,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878070665] [2022-02-11 00:06:39,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:39,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:06:39,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:39,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:06:39,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:06:39,729 INFO L87 Difference]: Start difference. First operand 23990 states and 91224 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:40,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:40,301 INFO L93 Difference]: Finished difference Result 25122 states and 94481 transitions. [2022-02-11 00:06:40,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:06:40,301 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:40,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:40,593 INFO L225 Difference]: With dead ends: 25122 [2022-02-11 00:06:40,594 INFO L226 Difference]: Without dead ends: 25084 [2022-02-11 00:06:40,594 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:06:40,594 INFO L934 BasicCegarLoop]: 60 mSDtfsCounter, 115 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:40,594 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 681 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:06:40,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25084 states. [2022-02-11 00:06:41,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25084 to 24200. [2022-02-11 00:06:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24200 states, 24199 states have (on average 3.803297656927972) internal successors, (92036), 24199 states have internal predecessors, (92036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:41,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24200 states to 24200 states and 92036 transitions. [2022-02-11 00:06:41,349 INFO L78 Accepts]: Start accepts. Automaton has 24200 states and 92036 transitions. Word has length 27 [2022-02-11 00:06:41,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:41,349 INFO L470 AbstractCegarLoop]: Abstraction has 24200 states and 92036 transitions. [2022-02-11 00:06:41,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 24200 states and 92036 transitions. [2022-02-11 00:06:41,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:41,405 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:41,405 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:41,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-02-11 00:06:41,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-02-11 00:06:41,606 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:41,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:41,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1613186170, now seen corresponding path program 64 times [2022-02-11 00:06:41,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:41,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637497662] [2022-02-11 00:06:41,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:41,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:41,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:41,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637497662] [2022-02-11 00:06:41,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637497662] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:41,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535489710] [2022-02-11 00:06:41,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:06:41,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:41,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:41,722 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:41,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-11 00:06:41,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:06:41,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:41,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:41,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:42,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:06:42,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535489710] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:42,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:42,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2022-02-11 00:06:42,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707160695] [2022-02-11 00:06:42,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:42,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:06:42,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:42,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:06:42,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:06:42,165 INFO L87 Difference]: Start difference. First operand 24200 states and 92036 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:42,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:42,648 INFO L93 Difference]: Finished difference Result 26053 states and 97640 transitions. [2022-02-11 00:06:42,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:06:42,649 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:42,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:42,751 INFO L225 Difference]: With dead ends: 26053 [2022-02-11 00:06:42,752 INFO L226 Difference]: Without dead ends: 25996 [2022-02-11 00:06:42,752 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:06:42,752 INFO L934 BasicCegarLoop]: 85 mSDtfsCounter, 139 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:42,752 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 746 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:06:43,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25996 states. [2022-02-11 00:06:43,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25996 to 24705. [2022-02-11 00:06:43,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24705 states, 24704 states have (on average 3.803958873056995) internal successors, (93973), 24704 states have internal predecessors, (93973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:43,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24705 states to 24705 states and 93973 transitions. [2022-02-11 00:06:43,679 INFO L78 Accepts]: Start accepts. Automaton has 24705 states and 93973 transitions. Word has length 27 [2022-02-11 00:06:43,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:43,679 INFO L470 AbstractCegarLoop]: Abstraction has 24705 states and 93973 transitions. [2022-02-11 00:06:43,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:43,680 INFO L276 IsEmpty]: Start isEmpty. Operand 24705 states and 93973 transitions. [2022-02-11 00:06:43,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:43,735 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:43,735 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:43,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-02-11 00:06:43,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:43,936 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:43,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:43,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1105734706, now seen corresponding path program 65 times [2022-02-11 00:06:43,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:43,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724202986] [2022-02-11 00:06:43,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:43,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:44,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:44,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724202986] [2022-02-11 00:06:44,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724202986] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:44,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783508238] [2022-02-11 00:06:44,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:06:44,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:44,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:44,052 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:44,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-11 00:06:44,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:06:44,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:44,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:44,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:44,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:06:44,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783508238] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:44,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:44,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 16 [2022-02-11 00:06:44,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060875910] [2022-02-11 00:06:44,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:44,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:06:44,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:44,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:06:44,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:06:44,472 INFO L87 Difference]: Start difference. First operand 24705 states and 93973 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:44,951 INFO L93 Difference]: Finished difference Result 25797 states and 97262 transitions. [2022-02-11 00:06:44,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:06:44,952 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:45,220 INFO L225 Difference]: With dead ends: 25797 [2022-02-11 00:06:45,221 INFO L226 Difference]: Without dead ends: 25767 [2022-02-11 00:06:45,221 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:06:45,221 INFO L934 BasicCegarLoop]: 60 mSDtfsCounter, 108 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:45,221 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 570 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:06:45,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25767 states. [2022-02-11 00:06:45,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25767 to 24956. [2022-02-11 00:06:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24956 states, 24955 states have (on average 3.8041274293728713) internal successors, (94932), 24955 states have internal predecessors, (94932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:45,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24956 states to 24956 states and 94932 transitions. [2022-02-11 00:06:45,900 INFO L78 Accepts]: Start accepts. Automaton has 24956 states and 94932 transitions. Word has length 27 [2022-02-11 00:06:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:45,900 INFO L470 AbstractCegarLoop]: Abstraction has 24956 states and 94932 transitions. [2022-02-11 00:06:45,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:45,900 INFO L276 IsEmpty]: Start isEmpty. Operand 24956 states and 94932 transitions. [2022-02-11 00:06:45,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:45,963 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:45,963 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:45,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-02-11 00:06:46,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-02-11 00:06:46,163 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:46,164 INFO L85 PathProgramCache]: Analyzing trace with hash -542120122, now seen corresponding path program 66 times [2022-02-11 00:06:46,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:46,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984847399] [2022-02-11 00:06:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:46,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:46,268 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:46,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984847399] [2022-02-11 00:06:46,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984847399] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:46,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10906908] [2022-02-11 00:06:46,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:06:46,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:46,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:46,272 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:46,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-11 00:06:46,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:06:46,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:46,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:46,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:46,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:06:46,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10906908] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:46,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:46,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 17 [2022-02-11 00:06:46,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706789548] [2022-02-11 00:06:46,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:46,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:06:46,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:46,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:06:46,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:06:46,727 INFO L87 Difference]: Start difference. First operand 24956 states and 94932 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:47,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:47,415 INFO L93 Difference]: Finished difference Result 26051 states and 98233 transitions. [2022-02-11 00:06:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:06:47,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:47,570 INFO L225 Difference]: With dead ends: 26051 [2022-02-11 00:06:47,570 INFO L226 Difference]: Without dead ends: 26021 [2022-02-11 00:06:47,570 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:06:47,571 INFO L934 BasicCegarLoop]: 57 mSDtfsCounter, 120 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:47,571 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 576 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:06:47,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26021 states. [2022-02-11 00:06:48,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26021 to 25256. [2022-02-11 00:06:48,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25256 states, 25255 states have (on average 3.8028905167293607) internal successors, (96042), 25255 states have internal predecessors, (96042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:48,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25256 states to 25256 states and 96042 transitions. [2022-02-11 00:06:48,321 INFO L78 Accepts]: Start accepts. Automaton has 25256 states and 96042 transitions. Word has length 27 [2022-02-11 00:06:48,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:48,321 INFO L470 AbstractCegarLoop]: Abstraction has 25256 states and 96042 transitions. [2022-02-11 00:06:48,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:48,321 INFO L276 IsEmpty]: Start isEmpty. Operand 25256 states and 96042 transitions. [2022-02-11 00:06:48,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:48,384 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:48,384 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:48,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-11 00:06:48,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-02-11 00:06:48,607 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:48,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:48,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1463907830, now seen corresponding path program 67 times [2022-02-11 00:06:48,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:48,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524879901] [2022-02-11 00:06:48,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:48,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:48,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:48,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524879901] [2022-02-11 00:06:48,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524879901] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:48,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745318453] [2022-02-11 00:06:48,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:06:48,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:48,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:48,735 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:48,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-11 00:06:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:48,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:48,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:49,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:06:49,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745318453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:49,184 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:49,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 17 [2022-02-11 00:06:49,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885238775] [2022-02-11 00:06:49,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:49,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:06:49,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:49,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:06:49,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:06:49,185 INFO L87 Difference]: Start difference. First operand 25256 states and 96042 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:50,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:50,011 INFO L93 Difference]: Finished difference Result 26140 states and 98548 transitions. [2022-02-11 00:06:50,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:06:50,011 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:50,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:50,093 INFO L225 Difference]: With dead ends: 26140 [2022-02-11 00:06:50,093 INFO L226 Difference]: Without dead ends: 26060 [2022-02-11 00:06:50,094 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:06:50,094 INFO L934 BasicCegarLoop]: 68 mSDtfsCounter, 118 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:50,094 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 741 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:06:50,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26060 states. [2022-02-11 00:06:50,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26060 to 25404. [2022-02-11 00:06:50,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25404 states, 25403 states have (on average 3.804117623902689) internal successors, (96636), 25403 states have internal predecessors, (96636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:50,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25404 states to 25404 states and 96636 transitions. [2022-02-11 00:06:50,810 INFO L78 Accepts]: Start accepts. Automaton has 25404 states and 96636 transitions. Word has length 27 [2022-02-11 00:06:50,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:50,810 INFO L470 AbstractCegarLoop]: Abstraction has 25404 states and 96636 transitions. [2022-02-11 00:06:50,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:50,810 INFO L276 IsEmpty]: Start isEmpty. Operand 25404 states and 96636 transitions. [2022-02-11 00:06:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:06:50,868 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:50,868 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:50,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-02-11 00:06:51,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:51,069 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:51,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:51,070 INFO L85 PathProgramCache]: Analyzing trace with hash 741935370, now seen corresponding path program 68 times [2022-02-11 00:06:51,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:51,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418020045] [2022-02-11 00:06:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:51,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:51,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:51,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418020045] [2022-02-11 00:06:51,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418020045] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:51,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059251388] [2022-02-11 00:06:51,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:06:51,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:51,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:51,218 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:51,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-11 00:06:51,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:06:51,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:51,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:06:51,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:51,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:06:51,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059251388] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:51,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:51,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-02-11 00:06:51,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385684334] [2022-02-11 00:06:51,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:51,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:06:51,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:51,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:06:51,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:06:51,689 INFO L87 Difference]: Start difference. First operand 25404 states and 96636 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:52,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:52,478 INFO L93 Difference]: Finished difference Result 27191 states and 101959 transitions. [2022-02-11 00:06:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:06:52,478 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:06:52,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:52,572 INFO L225 Difference]: With dead ends: 27191 [2022-02-11 00:06:52,572 INFO L226 Difference]: Without dead ends: 27161 [2022-02-11 00:06:52,573 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:06:52,573 INFO L934 BasicCegarLoop]: 83 mSDtfsCounter, 141 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:52,573 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 890 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:06:52,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27161 states. [2022-02-11 00:06:53,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27161 to 25631. [2022-02-11 00:06:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25631 states, 25630 states have (on average 3.8072181037846273) internal successors, (97579), 25630 states have internal predecessors, (97579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25631 states to 25631 states and 97579 transitions. [2022-02-11 00:06:53,322 INFO L78 Accepts]: Start accepts. Automaton has 25631 states and 97579 transitions. Word has length 27 [2022-02-11 00:06:53,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:53,322 INFO L470 AbstractCegarLoop]: Abstraction has 25631 states and 97579 transitions. [2022-02-11 00:06:53,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:53,322 INFO L276 IsEmpty]: Start isEmpty. Operand 25631 states and 97579 transitions. [2022-02-11 00:06:53,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:06:53,384 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:53,384 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:53,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-02-11 00:06:53,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:53,584 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:53,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:53,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1010428170, now seen corresponding path program 69 times [2022-02-11 00:06:53,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:53,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852711634] [2022-02-11 00:06:53,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:53,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:06:53,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:53,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852711634] [2022-02-11 00:06:53,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852711634] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:53,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591358617] [2022-02-11 00:06:53,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:06:53,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:53,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:53,645 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:53,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-11 00:06:53,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:06:53,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:53,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-11 00:06:53,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:06:53,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:06:53,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591358617] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:53,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:53,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-11 00:06:53,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401315304] [2022-02-11 00:06:53,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:53,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:06:53,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:53,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:06:53,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:06:53,800 INFO L87 Difference]: Start difference. First operand 25631 states and 97579 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:55,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:55,115 INFO L93 Difference]: Finished difference Result 45208 states and 159277 transitions. [2022-02-11 00:06:55,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-11 00:06:55,116 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:06:55,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:55,284 INFO L225 Difference]: With dead ends: 45208 [2022-02-11 00:06:55,284 INFO L226 Difference]: Without dead ends: 44876 [2022-02-11 00:06:55,284 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=946, Invalid=3086, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:06:55,285 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 358 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:55,285 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 229 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:06:55,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44876 states. [2022-02-11 00:06:56,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44876 to 29739. [2022-02-11 00:06:56,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29739 states, 29738 states have (on average 3.745947945389737) internal successors, (111397), 29738 states have internal predecessors, (111397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29739 states to 29739 states and 111397 transitions. [2022-02-11 00:06:56,396 INFO L78 Accepts]: Start accepts. Automaton has 29739 states and 111397 transitions. Word has length 29 [2022-02-11 00:06:56,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:56,396 INFO L470 AbstractCegarLoop]: Abstraction has 29739 states and 111397 transitions. [2022-02-11 00:06:56,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:56,396 INFO L276 IsEmpty]: Start isEmpty. Operand 29739 states and 111397 transitions. [2022-02-11 00:06:56,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:06:56,471 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:56,471 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:56,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-02-11 00:06:56,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-02-11 00:06:56,672 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:56,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:56,672 INFO L85 PathProgramCache]: Analyzing trace with hash -917674058, now seen corresponding path program 70 times [2022-02-11 00:06:56,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:56,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877041282] [2022-02-11 00:06:56,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:56,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:06:56,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:56,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877041282] [2022-02-11 00:06:56,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877041282] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:56,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987182898] [2022-02-11 00:06:56,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:06:56,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:56,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:56,709 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:56,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-11 00:06:56,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:06:56,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:56,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-11 00:06:56,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:06:56,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:06:56,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987182898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:56,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:56,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-11 00:06:56,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118713182] [2022-02-11 00:06:56,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:56,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 00:06:56,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:56,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 00:06:56,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:06:56,823 INFO L87 Difference]: Start difference. First operand 29739 states and 111397 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:57,202 INFO L93 Difference]: Finished difference Result 39651 states and 146789 transitions. [2022-02-11 00:06:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:06:57,202 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:06:57,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:57,561 INFO L225 Difference]: With dead ends: 39651 [2022-02-11 00:06:57,561 INFO L226 Difference]: Without dead ends: 39530 [2022-02-11 00:06:57,561 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:06:57,562 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 188 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:57,562 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 63 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:06:57,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39530 states. [2022-02-11 00:06:58,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39530 to 36556. [2022-02-11 00:06:58,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36556 states, 36555 states have (on average 3.7629052113254002) internal successors, (137553), 36555 states have internal predecessors, (137553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:58,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36556 states to 36556 states and 137553 transitions. [2022-02-11 00:06:58,615 INFO L78 Accepts]: Start accepts. Automaton has 36556 states and 137553 transitions. Word has length 29 [2022-02-11 00:06:58,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:58,615 INFO L470 AbstractCegarLoop]: Abstraction has 36556 states and 137553 transitions. [2022-02-11 00:06:58,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:58,615 INFO L276 IsEmpty]: Start isEmpty. Operand 36556 states and 137553 transitions. [2022-02-11 00:06:58,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:06:58,911 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:58,911 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:58,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-11 00:06:59,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-02-11 00:06:59,112 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:06:59,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:59,113 INFO L85 PathProgramCache]: Analyzing trace with hash -33618958, now seen corresponding path program 71 times [2022-02-11 00:06:59,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:59,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897225332] [2022-02-11 00:06:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:59,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:06:59,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:59,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897225332] [2022-02-11 00:06:59,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897225332] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:59,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395850288] [2022-02-11 00:06:59,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:06:59,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:59,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:59,156 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:06:59,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-11 00:06:59,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:06:59,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:59,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-11 00:06:59,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:59,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:06:59,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:06:59,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395850288] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:59,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:59,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 00:06:59,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415891790] [2022-02-11 00:06:59,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:59,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 00:06:59,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:59,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 00:06:59,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:06:59,284 INFO L87 Difference]: Start difference. First operand 36556 states and 137553 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:07:00,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:07:00,338 INFO L93 Difference]: Finished difference Result 72604 states and 263288 transitions. [2022-02-11 00:07:00,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:07:00,339 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:07:00,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:07:01,078 INFO L225 Difference]: With dead ends: 72604 [2022-02-11 00:07:01,078 INFO L226 Difference]: Without dead ends: 71924 [2022-02-11 00:07:01,078 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=456, Invalid=1436, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:07:01,078 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 690 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:07:01,079 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 74 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:07:01,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71924 states. [2022-02-11 00:07:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71924 to 56835. [2022-02-11 00:07:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56835 states, 56834 states have (on average 3.780958581131013) internal successors, (214887), 56834 states have internal predecessors, (214887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:07:04,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56835 states to 56835 states and 214887 transitions. [2022-02-11 00:07:04,093 INFO L78 Accepts]: Start accepts. Automaton has 56835 states and 214887 transitions. Word has length 29 [2022-02-11 00:07:04,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:07:04,093 INFO L470 AbstractCegarLoop]: Abstraction has 56835 states and 214887 transitions. [2022-02-11 00:07:04,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:07:04,094 INFO L276 IsEmpty]: Start isEmpty. Operand 56835 states and 214887 transitions. [2022-02-11 00:07:04,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:07:04,280 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:07:04,280 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:07:04,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-02-11 00:07:04,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:07:04,506 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:07:04,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:07:04,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1595309198, now seen corresponding path program 72 times [2022-02-11 00:07:04,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:07:04,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712457764] [2022-02-11 00:07:04,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:07:04,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:07:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:07:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:07:04,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:07:04,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712457764] [2022-02-11 00:07:04,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712457764] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:07:04,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387484849] [2022-02-11 00:07:04,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:07:04,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:07:04,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:07:04,552 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:07:04,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-11 00:07:04,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:07:04,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:07:04,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-11 00:07:04,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:07:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:07:04,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:07:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:07:04,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387484849] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:07:04,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:07:04,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-02-11 00:07:04,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888604023] [2022-02-11 00:07:04,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:07:04,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 00:07:04,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:07:04,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 00:07:04,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:07:04,737 INFO L87 Difference]: Start difference. First operand 56835 states and 214887 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:07:06,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:07:06,892 INFO L93 Difference]: Finished difference Result 89898 states and 321645 transitions. [2022-02-11 00:07:06,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-11 00:07:06,900 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:07:06,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:07:07,720 INFO L225 Difference]: With dead ends: 89898 [2022-02-11 00:07:07,720 INFO L226 Difference]: Without dead ends: 89269 [2022-02-11 00:07:07,721 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1258, Invalid=4442, Unknown=0, NotChecked=0, Total=5700 [2022-02-11 00:07:07,721 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 515 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:07:07,721 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 277 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:07:07,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89269 states. [2022-02-11 00:07:09,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89269 to 56278. [2022-02-11 00:07:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56278 states, 56277 states have (on average 3.725216340600956) internal successors, (209644), 56277 states have internal predecessors, (209644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:07:10,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56278 states to 56278 states and 209644 transitions. [2022-02-11 00:07:10,161 INFO L78 Accepts]: Start accepts. Automaton has 56278 states and 209644 transitions. Word has length 29 [2022-02-11 00:07:10,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:07:10,161 INFO L470 AbstractCegarLoop]: Abstraction has 56278 states and 209644 transitions. [2022-02-11 00:07:10,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:07:10,161 INFO L276 IsEmpty]: Start isEmpty. Operand 56278 states and 209644 transitions. [2022-02-11 00:07:10,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:07:10,322 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:07:10,322 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:07:10,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-11 00:07:10,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:07:10,525 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:07:10,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:07:10,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1683071826, now seen corresponding path program 73 times [2022-02-11 00:07:10,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:07:10,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593862341] [2022-02-11 00:07:10,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:07:10,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:07:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:07:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:07:10,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:07:10,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593862341] [2022-02-11 00:07:10,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593862341] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:07:10,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845576763] [2022-02-11 00:07:10,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:07:10,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:07:10,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:07:10,556 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:07:10,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-11 00:07:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:07:10,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-11 00:07:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:07:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:07:10,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:07:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:07:10,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845576763] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:07:10,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:07:10,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 00:07:10,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384248931] [2022-02-11 00:07:10,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:07:10,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:07:10,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:07:10,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:07:10,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:07:10,678 INFO L87 Difference]: Start difference. First operand 56278 states and 209644 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:07:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:07:11,614 INFO L93 Difference]: Finished difference Result 71865 states and 264151 transitions. [2022-02-11 00:07:11,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:07:11,617 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:07:11,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:07:11,953 INFO L225 Difference]: With dead ends: 71865 [2022-02-11 00:07:11,953 INFO L226 Difference]: Without dead ends: 71569 [2022-02-11 00:07:11,953 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:07:11,953 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 85 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:07:11,953 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 72 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:07:12,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71569 states.