/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-bc289cb [2022-01-28 15:19:33,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-28 15:19:33,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-28 15:19:33,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-28 15:19:33,988 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 [2022-01-28 15:19:34,002 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-28 15:19:34,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-28 15:19:34,003 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-28 15:19:34,003 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-28 15:19:34,003 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-28 15:19:34,003 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-28 15:19:34,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-28 15:19:34,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-28 15:19:34,004 INFO L138 SettingsManager]: * Use SBE=true [2022-01-28 15:19:34,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-28 15:19:34,004 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-28 15:19:34,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-28 15:19:34,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-28 15:19:34,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-28 15:19:34,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-28 15:19:34,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-28 15:19:34,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-28 15:19:34,005 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-28 15:19:34,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-28 15:19:34,005 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-28 15:19:34,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-28 15:19:34,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-28 15:19:34,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-28 15:19:34,006 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-28 15:19:34,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-28 15:19:34,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 15:19:34,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-28 15:19:34,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-28 15:19:34,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-28 15:19:34,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-28 15:19:34,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-28 15:19:34,007 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-28 15:19:34,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-28 15:19:34,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-28 15:19:34,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-28 15:19:34,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-28 15:19:34,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-28 15:19:34,228 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-28 15:19:34,230 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-28 15:19:34,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl [2022-01-28 15:19:34,231 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl' [2022-01-28 15:19:34,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-28 15:19:34,252 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-28 15:19:34,252 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-28 15:19:34,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-28 15:19:34,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-28 15:19:34,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:34" (1/1) ... [2022-01-28 15:19:34,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:34" (1/1) ... [2022-01-28 15:19:34,270 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-28 15:19:34,272 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-28 15:19:34,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-28 15:19:34,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-28 15:19:34,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-28 15:19:34,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:34" (1/1) ... [2022-01-28 15:19:34,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:34" (1/1) ... [2022-01-28 15:19:34,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:34" (1/1) ... [2022-01-28 15:19:34,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:34" (1/1) ... [2022-01-28 15:19:34,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:34" (1/1) ... [2022-01-28 15:19:34,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:34" (1/1) ... [2022-01-28 15:19:34,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:34" (1/1) ... [2022-01-28 15:19:34,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-28 15:19:34,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-28 15:19:34,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-28 15:19:34,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-28 15:19:34,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:34" (1/1) ... [2022-01-28 15:19:34,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 15:19:34,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:34,310 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) [2022-01-28 15:19:34,315 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 [2022-01-28 15:19:34,340 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-28 15:19:34,340 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-28 15:19:34,341 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-28 15:19:34,341 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-28 15:19:34,341 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-28 15:19:34,341 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-28 15:19:34,341 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-28 15:19:34,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-28 15:19:34,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-28 15:19:34,342 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-28 15:19:34,342 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-28 15:19:34,342 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-28 15:19:34,342 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-28 15:19:34,343 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-28 15:19:34,343 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-28 15:19:34,344 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-28 15:19:34,381 INFO L234 CfgBuilder]: Building ICFG [2022-01-28 15:19:34,382 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-28 15:19:34,462 INFO L275 CfgBuilder]: Performing block encoding [2022-01-28 15:19:34,474 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-28 15:19:34,474 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-28 15:19:34,476 INFO L202 PluginConnector]: Adding new model mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:19:34 BoogieIcfgContainer [2022-01-28 15:19:34,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-28 15:19:34,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-28 15:19:34,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-28 15:19:34,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-28 15:19:34,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:34" (1/2) ... [2022-01-28 15:19:34,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f6f371 and model type mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:19:34, skipping insertion in model container [2022-01-28 15:19:34,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:19:34" (2/2) ... [2022-01-28 15:19:34,493 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-4.wvr.bpl [2022-01-28 15:19:34,496 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-28 15:19:34,496 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-28 15:19:34,501 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-28 15:19:34,502 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-28 15:19:34,549 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-01-28 15:19:34,602 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-28 15:19:34,608 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 [2022-01-28 15:19:34,609 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-01-28 15:19:34,620 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 36 transitions, 104 flow [2022-01-28 15:19:34,688 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 432 states, 431 states have (on average 3.8422273781902554) internal successors, (1656), 431 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:34,692 INFO L276 IsEmpty]: Start isEmpty. Operand has 432 states, 431 states have (on average 3.8422273781902554) internal successors, (1656), 431 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:34,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-28 15:19:34,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:34,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:34,712 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:34,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:34,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2108123221, now seen corresponding path program 1 times [2022-01-28 15:19:34,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:34,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283344149] [2022-01-28 15:19:34,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:34,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:34,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:34,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283344149] [2022-01-28 15:19:34,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283344149] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:19:34,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:19:34,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 15:19:34,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754343793] [2022-01-28 15:19:34,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:34,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-28 15:19:34,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:34,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-28 15:19:34,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 15:19:34,937 INFO L87 Difference]: Start difference. First operand has 432 states, 431 states have (on average 3.8422273781902554) internal successors, (1656), 431 states have internal predecessors, (1656), 0 states have call successors, (0), 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 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:35,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:35,005 INFO L93 Difference]: Finished difference Result 857 states and 3120 transitions. [2022-01-28 15:19:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-28 15:19:35,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-28 15:19:35,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:35,021 INFO L225 Difference]: With dead ends: 857 [2022-01-28 15:19:35,022 INFO L226 Difference]: Without dead ends: 732 [2022-01-28 15:19:35,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 15:19:35,025 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:35,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 32 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:35,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-01-28 15:19:35,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 698. [2022-01-28 15:19:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 3.720229555236729) internal successors, (2593), 697 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2593 transitions. [2022-01-28 15:19:35,146 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2593 transitions. Word has length 22 [2022-01-28 15:19:35,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:35,147 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 2593 transitions. [2022-01-28 15:19:35,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:35,148 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2593 transitions. [2022-01-28 15:19:35,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:19:35,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:35,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:35,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-28 15:19:35,153 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:35,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:35,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1934695763, now seen corresponding path program 1 times [2022-01-28 15:19:35,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:35,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211358058] [2022-01-28 15:19:35,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:35,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:35,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:35,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211358058] [2022-01-28 15:19:35,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211358058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:35,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467044289] [2022-01-28 15:19:35,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:35,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:35,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:35,261 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) [2022-01-28 15:19:35,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-28 15:19:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:35,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 15:19:35,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:35,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:35,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467044289] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:35,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-28 15:19:35,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2022-01-28 15:19:35,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809669941] [2022-01-28 15:19:35,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:35,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:19:35,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:35,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:19:35,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-28 15:19:35,507 INFO L87 Difference]: Start difference. First operand 698 states and 2593 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2022-01-28 15:19:35,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:35,620 INFO L93 Difference]: Finished difference Result 1569 states and 5772 transitions. [2022-01-28 15:19:35,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:19:35,621 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 24 [2022-01-28 15:19:35,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:35,634 INFO L225 Difference]: With dead ends: 1569 [2022-01-28 15:19:35,634 INFO L226 Difference]: Without dead ends: 1569 [2022-01-28 15:19:35,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:19:35,637 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 98 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:35,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 75 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:35,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2022-01-28 15:19:35,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 818. [2022-01-28 15:19:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.7796817625459) internal successors, (3088), 817 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:35,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 3088 transitions. [2022-01-28 15:19:35,686 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 3088 transitions. Word has length 24 [2022-01-28 15:19:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:35,687 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 3088 transitions. [2022-01-28 15:19:35,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2022-01-28 15:19:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 3088 transitions. [2022-01-28 15:19:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:19:35,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:35,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:35,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:35,909 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 [2022-01-28 15:19:35,910 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:35,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:35,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1365945047, now seen corresponding path program 1 times [2022-01-28 15:19:35,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:35,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233713716] [2022-01-28 15:19:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:35,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:35,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:35,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233713716] [2022-01-28 15:19:35,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233713716] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:19:35,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:19:35,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 15:19:35,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887220328] [2022-01-28 15:19:35,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:35,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:19:35,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:35,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:19:35,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:19:35,960 INFO L87 Difference]: Start difference. First operand 818 states and 3088 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2022-01-28 15:19:36,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:36,014 INFO L93 Difference]: Finished difference Result 912 states and 3305 transitions. [2022-01-28 15:19:36,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 15:19:36,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 24 [2022-01-28 15:19:36,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:36,019 INFO L225 Difference]: With dead ends: 912 [2022-01-28 15:19:36,019 INFO L226 Difference]: Without dead ends: 802 [2022-01-28 15:19:36,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:19:36,022 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:36,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 50 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-01-28 15:19:36,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 786. [2022-01-28 15:19:36,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 3.7961783439490446) internal successors, (2980), 785 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:36,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2980 transitions. [2022-01-28 15:19:36,055 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2980 transitions. Word has length 24 [2022-01-28 15:19:36,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:36,055 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 2980 transitions. [2022-01-28 15:19:36,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2022-01-28 15:19:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2980 transitions. [2022-01-28 15:19:36,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:19:36,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:36,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:36,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-28 15:19:36,058 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:36,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:36,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1105199987, now seen corresponding path program 2 times [2022-01-28 15:19:36,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:36,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796626724] [2022-01-28 15:19:36,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:36,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:36,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:36,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796626724] [2022-01-28 15:19:36,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796626724] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:19:36,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:19:36,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 15:19:36,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682479137] [2022-01-28 15:19:36,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:36,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:19:36,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:36,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:19:36,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:19:36,117 INFO L87 Difference]: Start difference. First operand 786 states and 2980 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2022-01-28 15:19:36,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:36,190 INFO L93 Difference]: Finished difference Result 1414 states and 5151 transitions. [2022-01-28 15:19:36,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 15:19:36,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 24 [2022-01-28 15:19:36,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:36,198 INFO L225 Difference]: With dead ends: 1414 [2022-01-28 15:19:36,198 INFO L226 Difference]: Without dead ends: 1414 [2022-01-28 15:19:36,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:19:36,204 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 86 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:36,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 57 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:36,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2022-01-28 15:19:36,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 870. [2022-01-28 15:19:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.7399309551208284) internal successors, (3250), 869 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:36,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 3250 transitions. [2022-01-28 15:19:36,230 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 3250 transitions. Word has length 24 [2022-01-28 15:19:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:36,230 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 3250 transitions. [2022-01-28 15:19:36,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2022-01-28 15:19:36,230 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 3250 transitions. [2022-01-28 15:19:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:19:36,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:36,233 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:36,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-28 15:19:36,233 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:36,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:36,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1733484731, now seen corresponding path program 2 times [2022-01-28 15:19:36,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:36,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484685919] [2022-01-28 15:19:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:36,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:36,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:36,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484685919] [2022-01-28 15:19:36,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484685919] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:19:36,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:19:36,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 15:19:36,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45969915] [2022-01-28 15:19:36,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:36,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:19:36,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:36,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:19:36,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:19:36,298 INFO L87 Difference]: Start difference. First operand 870 states and 3250 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2022-01-28 15:19:36,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:36,361 INFO L93 Difference]: Finished difference Result 1273 states and 4665 transitions. [2022-01-28 15:19:36,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 15:19:36,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 24 [2022-01-28 15:19:36,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:36,367 INFO L225 Difference]: With dead ends: 1273 [2022-01-28 15:19:36,367 INFO L226 Difference]: Without dead ends: 1203 [2022-01-28 15:19:36,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:19:36,368 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 73 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:36,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 58 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:36,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2022-01-28 15:19:36,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 872. [2022-01-28 15:19:36,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.7611940298507465) internal successors, (3276), 871 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 3276 transitions. [2022-01-28 15:19:36,389 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 3276 transitions. Word has length 24 [2022-01-28 15:19:36,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:36,389 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 3276 transitions. [2022-01-28 15:19:36,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2022-01-28 15:19:36,389 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 3276 transitions. [2022-01-28 15:19:36,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:19:36,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:36,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:36,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-28 15:19:36,392 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:36,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:36,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1394405233, now seen corresponding path program 3 times [2022-01-28 15:19:36,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:36,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511891278] [2022-01-28 15:19:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:36,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:36,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:36,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511891278] [2022-01-28 15:19:36,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511891278] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:36,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751278063] [2022-01-28 15:19:36,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:19:36,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:36,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:36,447 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) [2022-01-28 15:19:36,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-28 15:19:36,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:19:36,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:36,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 15:19:36,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:36,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:36,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751278063] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:36,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-28 15:19:36,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2022-01-28 15:19:36,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460567301] [2022-01-28 15:19:36,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:36,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:19:36,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:36,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:19:36,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-28 15:19:36,631 INFO L87 Difference]: Start difference. First operand 872 states and 3276 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2022-01-28 15:19:36,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:36,725 INFO L93 Difference]: Finished difference Result 1067 states and 3966 transitions. [2022-01-28 15:19:36,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:19:36,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 24 [2022-01-28 15:19:36,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:36,730 INFO L225 Difference]: With dead ends: 1067 [2022-01-28 15:19:36,730 INFO L226 Difference]: Without dead ends: 1017 [2022-01-28 15:19:36,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:19:36,732 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 67 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:36,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 66 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:36,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-01-28 15:19:36,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 712. [2022-01-28 15:19:36,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 3.828410689170183) internal successors, (2722), 711 states have internal predecessors, (2722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:36,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2722 transitions. [2022-01-28 15:19:36,751 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2722 transitions. Word has length 24 [2022-01-28 15:19:36,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:36,751 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 2722 transitions. [2022-01-28 15:19:36,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2022-01-28 15:19:36,752 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2722 transitions. [2022-01-28 15:19:36,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:19:36,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:36,754 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:36,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:36,967 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,SelfDestructingSolverStorable5 [2022-01-28 15:19:36,968 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:36,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:36,968 INFO L85 PathProgramCache]: Analyzing trace with hash -572986893, now seen corresponding path program 1 times [2022-01-28 15:19:36,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:36,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063304813] [2022-01-28 15:19:36,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:36,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:37,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:37,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063304813] [2022-01-28 15:19:37,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063304813] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:37,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371781394] [2022-01-28 15:19:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:37,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:37,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:37,012 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) [2022-01-28 15:19:37,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-28 15:19:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:37,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 15:19:37,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:37,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:37,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371781394] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:37,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-28 15:19:37,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2022-01-28 15:19:37,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374687858] [2022-01-28 15:19:37,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:37,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:19:37,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:37,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:19:37,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-28 15:19:37,161 INFO L87 Difference]: Start difference. First operand 712 states and 2722 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:37,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:37,224 INFO L93 Difference]: Finished difference Result 1155 states and 4394 transitions. [2022-01-28 15:19:37,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:19:37,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:19:37,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:37,230 INFO L225 Difference]: With dead ends: 1155 [2022-01-28 15:19:37,230 INFO L226 Difference]: Without dead ends: 1155 [2022-01-28 15:19:37,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:19:37,231 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 71 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:37,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 74 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:37,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2022-01-28 15:19:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 802. [2022-01-28 15:19:37,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.857677902621723) internal successors, (3090), 801 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:37,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 3090 transitions. [2022-01-28 15:19:37,250 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 3090 transitions. Word has length 26 [2022-01-28 15:19:37,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:37,250 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 3090 transitions. [2022-01-28 15:19:37,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:37,250 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 3090 transitions. [2022-01-28 15:19:37,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-28 15:19:37,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:37,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:37,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:37,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:37,464 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:37,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:37,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1469044683, now seen corresponding path program 1 times [2022-01-28 15:19:37,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:37,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86650759] [2022-01-28 15:19:37,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:37,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:37,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:37,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86650759] [2022-01-28 15:19:37,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86650759] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:37,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699451870] [2022-01-28 15:19:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:37,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:37,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:37,529 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) [2022-01-28 15:19:37,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-28 15:19:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:37,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 15:19:37,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:19:37,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:19:37,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699451870] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:37,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-28 15:19:37,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2022-01-28 15:19:37,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520524592] [2022-01-28 15:19:37,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:37,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:19:37,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:37,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:19:37,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:19:37,684 INFO L87 Difference]: Start difference. First operand 802 states and 3090 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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) [2022-01-28 15:19:37,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:37,745 INFO L93 Difference]: Finished difference Result 1655 states and 6225 transitions. [2022-01-28 15:19:37,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:19:37,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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 28 [2022-01-28 15:19:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:37,754 INFO L225 Difference]: With dead ends: 1655 [2022-01-28 15:19:37,754 INFO L226 Difference]: Without dead ends: 1655 [2022-01-28 15:19:37,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:19:37,755 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 82 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:37,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 68 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:37,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2022-01-28 15:19:37,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 953. [2022-01-28 15:19:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.889705882352941) internal successors, (3703), 952 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:37,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3703 transitions. [2022-01-28 15:19:37,795 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3703 transitions. Word has length 28 [2022-01-28 15:19:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:37,796 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 3703 transitions. [2022-01-28 15:19:37,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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) [2022-01-28 15:19:37,796 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3703 transitions. [2022-01-28 15:19:37,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-28 15:19:37,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:37,799 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:37,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:38,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:38,011 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:38,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:38,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1066409119, now seen corresponding path program 2 times [2022-01-28 15:19:38,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:38,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891737673] [2022-01-28 15:19:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:38,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:38,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:38,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891737673] [2022-01-28 15:19:38,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891737673] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:38,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47646377] [2022-01-28 15:19:38,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:19:38,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:38,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:38,108 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) [2022-01-28 15:19:38,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-28 15:19:38,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:19:38,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:38,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 15:19:38,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:19:38,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-28 15:19:38,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47646377] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:19:38,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-28 15:19:38,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-01-28 15:19:38,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975053591] [2022-01-28 15:19:38,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:38,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:19:38,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:38,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:19:38,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:19:38,222 INFO L87 Difference]: Start difference. First operand 953 states and 3703 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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) [2022-01-28 15:19:38,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:38,276 INFO L93 Difference]: Finished difference Result 1136 states and 4368 transitions. [2022-01-28 15:19:38,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 15:19:38,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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 28 [2022-01-28 15:19:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:38,282 INFO L225 Difference]: With dead ends: 1136 [2022-01-28 15:19:38,282 INFO L226 Difference]: Without dead ends: 1088 [2022-01-28 15:19:38,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:19:38,283 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:38,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 66 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:38,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2022-01-28 15:19:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 937. [2022-01-28 15:19:38,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.8792735042735043) internal successors, (3631), 936 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:38,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3631 transitions. [2022-01-28 15:19:38,303 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3631 transitions. Word has length 28 [2022-01-28 15:19:38,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:38,304 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3631 transitions. [2022-01-28 15:19:38,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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) [2022-01-28 15:19:38,304 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3631 transitions. [2022-01-28 15:19:38,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:19:38,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:38,306 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:38,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:38,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:38,523 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:38,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:38,523 INFO L85 PathProgramCache]: Analyzing trace with hash 364472883, now seen corresponding path program 1 times [2022-01-28 15:19:38,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:38,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155289796] [2022-01-28 15:19:38,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:38,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:38,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:38,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155289796] [2022-01-28 15:19:38,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155289796] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:38,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335481555] [2022-01-28 15:19:38,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:38,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:38,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:38,599 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) [2022-01-28 15:19:38,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-28 15:19:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:38,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-28 15:19:38,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:38,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:38,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335481555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:38,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:38,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2022-01-28 15:19:38,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989706461] [2022-01-28 15:19:38,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:38,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 15:19:38,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:38,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 15:19:38,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-28 15:19:38,825 INFO L87 Difference]: Start difference. First operand 937 states and 3631 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:38,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:38,982 INFO L93 Difference]: Finished difference Result 4025 states and 15417 transitions. [2022-01-28 15:19:38,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 15:19:38,982 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:19:38,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:39,011 INFO L225 Difference]: With dead ends: 4025 [2022-01-28 15:19:39,011 INFO L226 Difference]: Without dead ends: 3705 [2022-01-28 15:19:39,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:19:39,012 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 112 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:39,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 219 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2022-01-28 15:19:39,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 2630. [2022-01-28 15:19:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 3.9790794979079496) internal successors, (10461), 2629 states have internal predecessors, (10461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:39,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 10461 transitions. [2022-01-28 15:19:39,085 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 10461 transitions. Word has length 30 [2022-01-28 15:19:39,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:39,085 INFO L470 AbstractCegarLoop]: Abstraction has 2630 states and 10461 transitions. [2022-01-28 15:19:39,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:39,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 10461 transitions. [2022-01-28 15:19:39,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-28 15:19:39,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:39,096 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:39,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:39,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:39,304 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:39,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:39,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1940569807, now seen corresponding path program 2 times [2022-01-28 15:19:39,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:39,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760883600] [2022-01-28 15:19:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:39,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:39,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:39,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760883600] [2022-01-28 15:19:39,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760883600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:39,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275696526] [2022-01-28 15:19:39,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:19:39,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:39,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:39,365 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) [2022-01-28 15:19:39,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-28 15:19:39,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:19:39,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:39,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:19:39,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:39,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:39,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275696526] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:39,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:39,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-01-28 15:19:39,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451361108] [2022-01-28 15:19:39,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:39,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:19:39,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:39,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:19:39,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:19:39,563 INFO L87 Difference]: Start difference. First operand 2630 states and 10461 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:39,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:39,875 INFO L93 Difference]: Finished difference Result 10282 states and 39507 transitions. [2022-01-28 15:19:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:19:39,875 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-28 15:19:39,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:39,945 INFO L225 Difference]: With dead ends: 10282 [2022-01-28 15:19:39,946 INFO L226 Difference]: Without dead ends: 10282 [2022-01-28 15:19:39,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:19:39,946 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 234 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:39,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 304 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:19:39,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10282 states. [2022-01-28 15:19:40,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10282 to 4060. [2022-01-28 15:19:40,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 4059 states have (on average 4.138950480413895) internal successors, (16800), 4059 states have internal predecessors, (16800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:40,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 16800 transitions. [2022-01-28 15:19:40,141 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 16800 transitions. Word has length 32 [2022-01-28 15:19:40,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:40,141 INFO L470 AbstractCegarLoop]: Abstraction has 4060 states and 16800 transitions. [2022-01-28 15:19:40,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:40,142 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 16800 transitions. [2022-01-28 15:19:40,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-28 15:19:40,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:40,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:40,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:40,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:40,374 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:40,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:40,374 INFO L85 PathProgramCache]: Analyzing trace with hash 706983797, now seen corresponding path program 3 times [2022-01-28 15:19:40,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:40,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116925098] [2022-01-28 15:19:40,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:40,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:40,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:40,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116925098] [2022-01-28 15:19:40,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116925098] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:40,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021163565] [2022-01-28 15:19:40,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:19:40,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:40,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:40,413 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) [2022-01-28 15:19:40,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-28 15:19:40,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:19:40,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:40,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 15:19:40,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:19:40,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:19:40,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021163565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:40,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:40,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-01-28 15:19:40,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815390015] [2022-01-28 15:19:40,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:40,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:19:40,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:40,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:19:40,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:19:40,638 INFO L87 Difference]: Start difference. First operand 4060 states and 16800 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 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) [2022-01-28 15:19:41,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:41,326 INFO L93 Difference]: Finished difference Result 15078 states and 59451 transitions. [2022-01-28 15:19:41,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-28 15:19:41,326 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 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 32 [2022-01-28 15:19:41,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:41,441 INFO L225 Difference]: With dead ends: 15078 [2022-01-28 15:19:41,441 INFO L226 Difference]: Without dead ends: 13577 [2022-01-28 15:19:41,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=413, Invalid=1309, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 15:19:41,442 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 462 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:41,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 313 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:19:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13577 states. [2022-01-28 15:19:41,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13577 to 7732. [2022-01-28 15:19:41,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7732 states, 7731 states have (on average 4.210322079937912) internal successors, (32550), 7731 states have internal predecessors, (32550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:41,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7732 states to 7732 states and 32550 transitions. [2022-01-28 15:19:41,754 INFO L78 Accepts]: Start accepts. Automaton has 7732 states and 32550 transitions. Word has length 32 [2022-01-28 15:19:41,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:41,754 INFO L470 AbstractCegarLoop]: Abstraction has 7732 states and 32550 transitions. [2022-01-28 15:19:41,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 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) [2022-01-28 15:19:41,754 INFO L276 IsEmpty]: Start isEmpty. Operand 7732 states and 32550 transitions. [2022-01-28 15:19:41,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-28 15:19:41,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:41,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:41,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-28 15:19:41,975 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,SelfDestructingSolverStorable11 [2022-01-28 15:19:41,976 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:41,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:41,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1468605159, now seen corresponding path program 4 times [2022-01-28 15:19:41,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:41,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615550691] [2022-01-28 15:19:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:41,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:42,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:42,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615550691] [2022-01-28 15:19:42,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615550691] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:42,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935936245] [2022-01-28 15:19:42,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:19:42,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:42,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:42,019 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) [2022-01-28 15:19:42,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-28 15:19:42,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:19:42,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:42,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:19:42,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:42,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:42,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935936245] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:42,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:42,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 12 [2022-01-28 15:19:42,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086404804] [2022-01-28 15:19:42,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:42,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:19:42,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:42,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:19:42,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:19:42,312 INFO L87 Difference]: Start difference. First operand 7732 states and 32550 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:42,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:42,511 INFO L93 Difference]: Finished difference Result 10612 states and 42670 transitions. [2022-01-28 15:19:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 15:19:42,511 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-28 15:19:42,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:42,551 INFO L225 Difference]: With dead ends: 10612 [2022-01-28 15:19:42,551 INFO L226 Difference]: Without dead ends: 10444 [2022-01-28 15:19:42,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:19:42,552 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 219 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:42,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 141 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:42,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10444 states. [2022-01-28 15:19:42,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10444 to 7659. [2022-01-28 15:19:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7659 states, 7658 states have (on average 4.165186732828415) internal successors, (31897), 7658 states have internal predecessors, (31897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:42,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7659 states to 7659 states and 31897 transitions. [2022-01-28 15:19:42,806 INFO L78 Accepts]: Start accepts. Automaton has 7659 states and 31897 transitions. Word has length 32 [2022-01-28 15:19:42,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:42,807 INFO L470 AbstractCegarLoop]: Abstraction has 7659 states and 31897 transitions. [2022-01-28 15:19:42,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:42,807 INFO L276 IsEmpty]: Start isEmpty. Operand 7659 states and 31897 transitions. [2022-01-28 15:19:42,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-28 15:19:42,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:42,826 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:42,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:43,026 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,SelfDestructingSolverStorable12 [2022-01-28 15:19:43,027 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:43,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:43,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1299192005, now seen corresponding path program 5 times [2022-01-28 15:19:43,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:43,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447857750] [2022-01-28 15:19:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:43,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:43,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:43,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447857750] [2022-01-28 15:19:43,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447857750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:43,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054324980] [2022-01-28 15:19:43,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:19:43,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:43,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:43,088 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) [2022-01-28 15:19:43,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-28 15:19:43,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:19:43,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:43,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:19:43,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:43,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:43,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054324980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:43,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:43,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 13 [2022-01-28 15:19:43,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839182803] [2022-01-28 15:19:43,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:43,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:19:43,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:43,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:19:43,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:19:43,331 INFO L87 Difference]: Start difference. First operand 7659 states and 31897 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:43,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:43,745 INFO L93 Difference]: Finished difference Result 18514 states and 73449 transitions. [2022-01-28 15:19:43,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:19:43,745 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-28 15:19:43,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:43,804 INFO L225 Difference]: With dead ends: 18514 [2022-01-28 15:19:43,804 INFO L226 Difference]: Without dead ends: 18514 [2022-01-28 15:19:43,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:19:43,805 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 271 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:43,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 280 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:19:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18514 states. [2022-01-28 15:19:44,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18514 to 9251. [2022-01-28 15:19:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9251 states, 9250 states have (on average 4.2796756756756755) internal successors, (39587), 9250 states have internal predecessors, (39587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:44,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9251 states to 9251 states and 39587 transitions. [2022-01-28 15:19:44,128 INFO L78 Accepts]: Start accepts. Automaton has 9251 states and 39587 transitions. Word has length 32 [2022-01-28 15:19:44,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:44,129 INFO L470 AbstractCegarLoop]: Abstraction has 9251 states and 39587 transitions. [2022-01-28 15:19:44,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:44,129 INFO L276 IsEmpty]: Start isEmpty. Operand 9251 states and 39587 transitions. [2022-01-28 15:19:44,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-28 15:19:44,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:44,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:44,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:44,367 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,SelfDestructingSolverStorable13 [2022-01-28 15:19:44,367 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:44,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:44,368 INFO L85 PathProgramCache]: Analyzing trace with hash 884732173, now seen corresponding path program 6 times [2022-01-28 15:19:44,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:44,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558255396] [2022-01-28 15:19:44,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:44,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:44,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:44,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558255396] [2022-01-28 15:19:44,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558255396] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:44,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677517915] [2022-01-28 15:19:44,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:19:44,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:44,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:44,409 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) [2022-01-28 15:19:44,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-28 15:19:44,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 15:19:44,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:44,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:19:44,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:19:44,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:44,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677517915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:44,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:44,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 12 [2022-01-28 15:19:44,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893960810] [2022-01-28 15:19:44,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:44,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:19:44,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:44,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:19:44,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:19:44,630 INFO L87 Difference]: Start difference. First operand 9251 states and 39587 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 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) [2022-01-28 15:19:44,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:44,928 INFO L93 Difference]: Finished difference Result 14150 states and 57257 transitions. [2022-01-28 15:19:44,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:19:44,929 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-28 15:19:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:44,973 INFO L225 Difference]: With dead ends: 14150 [2022-01-28 15:19:44,974 INFO L226 Difference]: Without dead ends: 13838 [2022-01-28 15:19:44,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:19:44,974 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 237 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:44,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 176 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13838 states. [2022-01-28 15:19:45,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13838 to 8957. [2022-01-28 15:19:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8957 states, 8956 states have (on average 4.271661456007146) internal successors, (38257), 8956 states have internal predecessors, (38257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:45,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8957 states to 8957 states and 38257 transitions. [2022-01-28 15:19:45,281 INFO L78 Accepts]: Start accepts. Automaton has 8957 states and 38257 transitions. Word has length 32 [2022-01-28 15:19:45,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:45,281 INFO L470 AbstractCegarLoop]: Abstraction has 8957 states and 38257 transitions. [2022-01-28 15:19:45,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 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) [2022-01-28 15:19:45,281 INFO L276 IsEmpty]: Start isEmpty. Operand 8957 states and 38257 transitions. [2022-01-28 15:19:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-28 15:19:45,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:45,303 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:45,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:45,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-28 15:19:45,515 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:45,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:45,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1788915635, now seen corresponding path program 7 times [2022-01-28 15:19:45,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:45,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728086614] [2022-01-28 15:19:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:45,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:45,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:45,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728086614] [2022-01-28 15:19:45,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728086614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:45,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719763546] [2022-01-28 15:19:45,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:19:45,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:45,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:45,563 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) [2022-01-28 15:19:45,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-28 15:19:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:45,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:19:45,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:45,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:45,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719763546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:45,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:45,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-01-28 15:19:45,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883341683] [2022-01-28 15:19:45,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:45,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 15:19:45,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:45,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 15:19:45,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:19:45,761 INFO L87 Difference]: Start difference. First operand 8957 states and 38257 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:46,048 INFO L93 Difference]: Finished difference Result 16495 states and 69502 transitions. [2022-01-28 15:19:46,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:19:46,049 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-28 15:19:46,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:46,103 INFO L225 Difference]: With dead ends: 16495 [2022-01-28 15:19:46,103 INFO L226 Difference]: Without dead ends: 16099 [2022-01-28 15:19:46,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:19:46,104 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 222 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:46,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 171 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:19:46,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16099 states. [2022-01-28 15:19:46,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16099 to 12463. [2022-01-28 15:19:46,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12463 states, 12462 states have (on average 4.367116032739528) internal successors, (54423), 12462 states have internal predecessors, (54423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12463 states to 12463 states and 54423 transitions. [2022-01-28 15:19:46,509 INFO L78 Accepts]: Start accepts. Automaton has 12463 states and 54423 transitions. Word has length 32 [2022-01-28 15:19:46,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:46,510 INFO L470 AbstractCegarLoop]: Abstraction has 12463 states and 54423 transitions. [2022-01-28 15:19:46,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:46,510 INFO L276 IsEmpty]: Start isEmpty. Operand 12463 states and 54423 transitions. [2022-01-28 15:19:46,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-28 15:19:46,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:46,541 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:46,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:46,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-28 15:19:46,755 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:46,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1529464653, now seen corresponding path program 8 times [2022-01-28 15:19:46,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:46,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294117824] [2022-01-28 15:19:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:46,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:46,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:46,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294117824] [2022-01-28 15:19:46,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294117824] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:46,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545891125] [2022-01-28 15:19:46,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:19:46,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:46,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:46,803 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) [2022-01-28 15:19:46,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-28 15:19:46,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:19:46,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:46,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:19:46,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:46,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:47,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545891125] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:47,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:47,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-01-28 15:19:47,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619217084] [2022-01-28 15:19:47,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:47,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:19:47,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:47,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:19:47,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:19:47,015 INFO L87 Difference]: Start difference. First operand 12463 states and 54423 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:48,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:48,563 INFO L93 Difference]: Finished difference Result 62523 states and 252085 transitions. [2022-01-28 15:19:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-28 15:19:48,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-28 15:19:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:48,966 INFO L225 Difference]: With dead ends: 62523 [2022-01-28 15:19:48,966 INFO L226 Difference]: Without dead ends: 61411 [2022-01-28 15:19:48,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1037, Invalid=3519, Unknown=0, NotChecked=0, Total=4556 [2022-01-28 15:19:48,967 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 744 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:48,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 380 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:19:49,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61411 states. [2022-01-28 15:19:50,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61411 to 25038. [2022-01-28 15:19:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25038 states, 25037 states have (on average 4.435155969165635) internal successors, (111043), 25037 states have internal predecessors, (111043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25038 states to 25038 states and 111043 transitions. [2022-01-28 15:19:50,212 INFO L78 Accepts]: Start accepts. Automaton has 25038 states and 111043 transitions. Word has length 32 [2022-01-28 15:19:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:50,213 INFO L470 AbstractCegarLoop]: Abstraction has 25038 states and 111043 transitions. [2022-01-28 15:19:50,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 25038 states and 111043 transitions. [2022-01-28 15:19:50,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-28 15:19:50,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:50,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:50,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:50,479 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,SelfDestructingSolverStorable16 [2022-01-28 15:19:50,480 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:50,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:50,480 INFO L85 PathProgramCache]: Analyzing trace with hash -296790773, now seen corresponding path program 9 times [2022-01-28 15:19:50,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:50,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436211371] [2022-01-28 15:19:50,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:50,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 15:19:50,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:50,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436211371] [2022-01-28 15:19:50,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436211371] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:50,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178413651] [2022-01-28 15:19:50,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:19:50,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:50,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:50,523 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) [2022-01-28 15:19:50,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-28 15:19:50,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:19:50,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:50,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:19:50,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 15:19:50,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 15:19:50,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178413651] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:50,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:50,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-01-28 15:19:50,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376422370] [2022-01-28 15:19:50,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:50,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:19:50,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:50,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:19:50,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:19:50,769 INFO L87 Difference]: Start difference. First operand 25038 states and 111043 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:51,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:51,878 INFO L93 Difference]: Finished difference Result 64526 states and 272218 transitions. [2022-01-28 15:19:51,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-28 15:19:51,878 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-28 15:19:51,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:52,375 INFO L225 Difference]: With dead ends: 64526 [2022-01-28 15:19:52,375 INFO L226 Difference]: Without dead ends: 61671 [2022-01-28 15:19:52,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=517, Invalid=1739, Unknown=0, NotChecked=0, Total=2256 [2022-01-28 15:19:52,376 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 690 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:52,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 250 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:19:52,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61671 states. [2022-01-28 15:19:53,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61671 to 37901. [2022-01-28 15:19:53,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37901 states, 37900 states have (on average 4.5351187335092344) internal successors, (171881), 37900 states have internal predecessors, (171881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:53,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37901 states to 37901 states and 171881 transitions. [2022-01-28 15:19:53,856 INFO L78 Accepts]: Start accepts. Automaton has 37901 states and 171881 transitions. Word has length 34 [2022-01-28 15:19:53,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:53,856 INFO L470 AbstractCegarLoop]: Abstraction has 37901 states and 171881 transitions. [2022-01-28 15:19:53,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:53,857 INFO L276 IsEmpty]: Start isEmpty. Operand 37901 states and 171881 transitions. [2022-01-28 15:19:53,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-28 15:19:53,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:53,954 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:53,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:54,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:54,161 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:54,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:54,161 INFO L85 PathProgramCache]: Analyzing trace with hash -824551801, now seen corresponding path program 10 times [2022-01-28 15:19:54,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:54,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217384884] [2022-01-28 15:19:54,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:54,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 15:19:54,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:54,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217384884] [2022-01-28 15:19:54,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217384884] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:54,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748104927] [2022-01-28 15:19:54,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:19:54,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:54,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:54,418 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) [2022-01-28 15:19:54,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-28 15:19:54,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:19:54,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:54,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:19:54,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 15:19:54,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 15:19:54,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748104927] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:54,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:54,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-01-28 15:19:54,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640444056] [2022-01-28 15:19:54,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:54,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:19:54,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:54,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:19:54,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:19:54,650 INFO L87 Difference]: Start difference. First operand 37901 states and 171881 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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) [2022-01-28 15:19:56,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:56,190 INFO L93 Difference]: Finished difference Result 77131 states and 323179 transitions. [2022-01-28 15:19:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-28 15:19:56,190 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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 34 [2022-01-28 15:19:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:56,683 INFO L225 Difference]: With dead ends: 77131 [2022-01-28 15:19:56,684 INFO L226 Difference]: Without dead ends: 75807 [2022-01-28 15:19:56,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=744, Invalid=2562, Unknown=0, NotChecked=0, Total=3306 [2022-01-28 15:19:56,685 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 427 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:56,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 585 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:19:56,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75807 states. [2022-01-28 15:19:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75807 to 44705. [2022-01-28 15:19:58,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44705 states, 44704 states have (on average 4.498792054402291) internal successors, (201114), 44704 states have internal predecessors, (201114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:58,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44705 states to 44705 states and 201114 transitions. [2022-01-28 15:19:58,438 INFO L78 Accepts]: Start accepts. Automaton has 44705 states and 201114 transitions. Word has length 34 [2022-01-28 15:19:58,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:58,438 INFO L470 AbstractCegarLoop]: Abstraction has 44705 states and 201114 transitions. [2022-01-28 15:19:58,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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) [2022-01-28 15:19:58,438 INFO L276 IsEmpty]: Start isEmpty. Operand 44705 states and 201114 transitions. [2022-01-28 15:19:58,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-28 15:19:58,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:58,808 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:58,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-28 15:19:59,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:59,008 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:19:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:59,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2101662471, now seen corresponding path program 11 times [2022-01-28 15:19:59,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:59,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925165922] [2022-01-28 15:19:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:59,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:19:59,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:59,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925165922] [2022-01-28 15:19:59,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925165922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:59,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428911771] [2022-01-28 15:19:59,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:19:59,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:59,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:59,070 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) [2022-01-28 15:19:59,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-28 15:19:59,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 15:19:59,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:59,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:19:59,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 15:19:59,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 15:19:59,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428911771] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:59,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:59,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-01-28 15:19:59,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063276602] [2022-01-28 15:19:59,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:59,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 15:19:59,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:59,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 15:19:59,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:19:59,369 INFO L87 Difference]: Start difference. First operand 44705 states and 201114 transitions. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:00,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:00,312 INFO L93 Difference]: Finished difference Result 69803 states and 307743 transitions. [2022-01-28 15:20:00,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 15:20:00,313 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-28 15:20:00,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:00,773 INFO L225 Difference]: With dead ends: 69803 [2022-01-28 15:20:00,773 INFO L226 Difference]: Without dead ends: 67685 [2022-01-28 15:20:00,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:20:00,774 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 298 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:00,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 236 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:20:00,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67685 states. [2022-01-28 15:20:02,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67685 to 55906. [2022-01-28 15:20:02,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55906 states, 55905 states have (on average 4.5403810034880605) internal successors, (253830), 55905 states have internal predecessors, (253830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55906 states to 55906 states and 253830 transitions. [2022-01-28 15:20:03,058 INFO L78 Accepts]: Start accepts. Automaton has 55906 states and 253830 transitions. Word has length 36 [2022-01-28 15:20:03,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:03,059 INFO L470 AbstractCegarLoop]: Abstraction has 55906 states and 253830 transitions. [2022-01-28 15:20:03,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 55906 states and 253830 transitions. [2022-01-28 15:20:03,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-28 15:20:03,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:03,219 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:03,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:03,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:03,420 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:20:03,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:03,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1582117723, now seen corresponding path program 12 times [2022-01-28 15:20:03,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:03,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959750850] [2022-01-28 15:20:03,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:03,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 15:20:03,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:03,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959750850] [2022-01-28 15:20:03,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959750850] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:03,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901538575] [2022-01-28 15:20:03,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:20:03,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:03,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:03,481 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) [2022-01-28 15:20:03,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-28 15:20:03,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:20:03,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:03,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:20:03,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:20:03,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:20:03,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901538575] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:03,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:03,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 15 [2022-01-28 15:20:03,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508564880] [2022-01-28 15:20:03,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:03,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:20:03,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:03,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:20:03,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:20:03,710 INFO L87 Difference]: Start difference. First operand 55906 states and 253830 transitions. Second operand has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:05,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:05,285 INFO L93 Difference]: Finished difference Result 123288 states and 564276 transitions. [2022-01-28 15:20:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 15:20:05,286 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-28 15:20:05,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:06,224 INFO L225 Difference]: With dead ends: 123288 [2022-01-28 15:20:06,224 INFO L226 Difference]: Without dead ends: 121266 [2022-01-28 15:20:06,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=215, Invalid=435, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:20:06,226 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 301 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:06,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 406 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:20:06,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121266 states. [2022-01-28 15:20:08,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121266 to 80926. [2022-01-28 15:20:08,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80926 states, 80925 states have (on average 4.637899289465555) internal successors, (375322), 80925 states have internal predecessors, (375322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80926 states to 80926 states and 375322 transitions. [2022-01-28 15:20:09,540 INFO L78 Accepts]: Start accepts. Automaton has 80926 states and 375322 transitions. Word has length 36 [2022-01-28 15:20:09,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:09,540 INFO L470 AbstractCegarLoop]: Abstraction has 80926 states and 375322 transitions. [2022-01-28 15:20:09,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 80926 states and 375322 transitions. [2022-01-28 15:20:09,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 15:20:09,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:09,759 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:09,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:09,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:09,961 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:20:09,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:09,962 INFO L85 PathProgramCache]: Analyzing trace with hash 69707247, now seen corresponding path program 13 times [2022-01-28 15:20:09,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:09,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017963183] [2022-01-28 15:20:09,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:09,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:20:10,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:10,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017963183] [2022-01-28 15:20:10,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017963183] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:10,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173270312] [2022-01-28 15:20:10,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:20:10,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:10,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:10,361 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) [2022-01-28 15:20:10,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-28 15:20:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:10,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:20:10,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:20:10,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:20:10,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173270312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:10,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:10,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 9 [2022-01-28 15:20:10,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803916482] [2022-01-28 15:20:10,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:10,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:20:10,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:10,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:20:10,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:20:10,665 INFO L87 Difference]: Start difference. First operand 80926 states and 375322 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:13,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:13,067 INFO L93 Difference]: Finished difference Result 199767 states and 935269 transitions. [2022-01-28 15:20:13,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:20:13,068 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 15:20:13,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:14,630 INFO L225 Difference]: With dead ends: 199767 [2022-01-28 15:20:14,630 INFO L226 Difference]: Without dead ends: 196764 [2022-01-28 15:20:14,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:20:14,631 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 170 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:14,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 571 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:20:14,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196764 states. [2022-01-28 15:20:19,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196764 to 139705. [2022-01-28 15:20:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139705 states, 139704 states have (on average 4.742784744889194) internal successors, (662586), 139704 states have internal predecessors, (662586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139705 states to 139705 states and 662586 transitions. [2022-01-28 15:20:20,764 INFO L78 Accepts]: Start accepts. Automaton has 139705 states and 662586 transitions. Word has length 38 [2022-01-28 15:20:20,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:20,764 INFO L470 AbstractCegarLoop]: Abstraction has 139705 states and 662586 transitions. [2022-01-28 15:20:20,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand 139705 states and 662586 transitions. [2022-01-28 15:20:21,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-28 15:20:21,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:21,285 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:21,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:21,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:21,486 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:20:21,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:21,486 INFO L85 PathProgramCache]: Analyzing trace with hash 7577325, now seen corresponding path program 14 times [2022-01-28 15:20:21,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:21,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912820408] [2022-01-28 15:20:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:21,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:20:21,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:21,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912820408] [2022-01-28 15:20:21,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912820408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:21,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513800088] [2022-01-28 15:20:21,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:20:21,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:21,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:21,561 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) [2022-01-28 15:20:21,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-28 15:20:21,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:20:21,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:21,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 15:20:21,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-28 15:20:21,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-28 15:20:22,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513800088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:22,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:22,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-28 15:20:22,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884964104] [2022-01-28 15:20:22,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:22,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:20:22,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:22,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:20:22,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:20:22,075 INFO L87 Difference]: Start difference. First operand 139705 states and 662586 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:29,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:29,525 INFO L93 Difference]: Finished difference Result 469712 states and 2082413 transitions. [2022-01-28 15:20:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-28 15:20:29,525 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-28 15:20:29,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:33,364 INFO L225 Difference]: With dead ends: 469712 [2022-01-28 15:20:33,365 INFO L226 Difference]: Without dead ends: 463987 [2022-01-28 15:20:33,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4939 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2857, Invalid=9799, Unknown=0, NotChecked=0, Total=12656 [2022-01-28 15:20:33,367 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 874 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:33,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 570 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 15:20:34,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463987 states. [2022-01-28 15:20:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463987 to 225649. [2022-01-28 15:20:46,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225649 states, 225648 states have (on average 4.718725625753386) internal successors, (1064771), 225648 states have internal predecessors, (1064771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:48,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225649 states to 225649 states and 1064771 transitions. [2022-01-28 15:20:48,794 INFO L78 Accepts]: Start accepts. Automaton has 225649 states and 1064771 transitions. Word has length 40 [2022-01-28 15:20:48,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:48,794 INFO L470 AbstractCegarLoop]: Abstraction has 225649 states and 1064771 transitions. [2022-01-28 15:20:48,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:48,794 INFO L276 IsEmpty]: Start isEmpty. Operand 225649 states and 1064771 transitions. [2022-01-28 15:20:49,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-28 15:20:49,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:49,889 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:49,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:50,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:50,091 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:20:50,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:50,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1204202959, now seen corresponding path program 15 times [2022-01-28 15:20:50,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:50,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486196022] [2022-01-28 15:20:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:50,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:20:50,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:50,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486196022] [2022-01-28 15:20:50,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486196022] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:50,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530516106] [2022-01-28 15:20:50,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:20:50,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:50,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:50,154 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) [2022-01-28 15:20:50,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-28 15:20:50,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 15:20:50,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:50,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 15:20:50,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:20:50,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:20:50,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530516106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:50,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:50,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-28 15:20:50,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522760013] [2022-01-28 15:20:50,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:50,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:20:50,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:50,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:20:50,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:20:50,437 INFO L87 Difference]: Start difference. First operand 225649 states and 1064771 transitions. Second operand has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:05,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:05,200 INFO L93 Difference]: Finished difference Result 857172 states and 3917001 transitions. [2022-01-28 15:21:05,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-28 15:21:05,220 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-28 15:21:05,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:15,014 INFO L225 Difference]: With dead ends: 857172 [2022-01-28 15:21:15,014 INFO L226 Difference]: Without dead ends: 830239 [2022-01-28 15:21:15,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1440, Invalid=4880, Unknown=0, NotChecked=0, Total=6320 [2022-01-28 15:21:15,016 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 811 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:15,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 524 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 15:21:16,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830239 states. [2022-01-28 15:21:48,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830239 to 585545. [2022-01-28 15:21:50,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585545 states, 585544 states have (on average 4.753137253562499) internal successors, (2783171), 585544 states have internal predecessors, (2783171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)