/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/test/hard1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 20:18:57,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 20:18:57,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 20:18:58,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 20:18:58,075 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-03 20:18:58,092 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 20:18:58,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 20:18:58,092 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 20:18:58,092 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 20:18:58,093 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 20:18:58,093 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 20:18:58,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 20:18:58,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 20:18:58,093 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 20:18:58,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 20:18:58,094 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 20:18:58,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 20:18:58,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 20:18:58,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 20:18:58,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 20:18:58,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 20:18:58,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 20:18:58,094 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 20:18:58,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 20:18:58,095 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 20:18:58,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 20:18:58,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 20:18:58,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 20:18:58,101 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 20:18:58,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 20:18:58,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 20:18:58,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 20:18:58,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 20:18:58,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 20:18:58,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 20:18:58,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 20:18:58,102 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 20:18:58,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 20:18:58,103 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 20:18:58,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 20:18:58,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 20:18:58,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 20:18:58,284 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 20:18:58,285 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 20:18:58,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl [2022-03-03 20:18:58,286 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl' [2022-03-03 20:18:58,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 20:18:58,302 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 20:18:58,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 20:18:58,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 20:18:58,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 20:18:58,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:18:58" (1/1) ... [2022-03-03 20:18:58,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:18:58" (1/1) ... [2022-03-03 20:18:58,325 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 20:18:58,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 20:18:58,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 20:18:58,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 20:18:58,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 20:18:58,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:18:58" (1/1) ... [2022-03-03 20:18:58,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:18:58" (1/1) ... [2022-03-03 20:18:58,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:18:58" (1/1) ... [2022-03-03 20:18:58,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:18:58" (1/1) ... [2022-03-03 20:18:58,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:18:58" (1/1) ... [2022-03-03 20:18:58,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:18:58" (1/1) ... [2022-03-03 20:18:58,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:18:58" (1/1) ... [2022-03-03 20:18:58,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 20:18:58,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 20:18:58,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 20:18:58,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 20:18:58,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:18:58" (1/1) ... [2022-03-03 20:18:58,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 20:18:58,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:58,362 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-03 20:18:58,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-03 20:18:58,388 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 20:18:58,388 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 20:18:58,388 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 20:18:58,388 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 20:18:58,388 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 20:18:58,388 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 20:18:58,388 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 20:18:58,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 20:18:58,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 20:18:58,389 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 20:18:58,389 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 20:18:58,389 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 20:18:58,389 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-03 20:18:58,389 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-03 20:18:58,389 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-03 20:18:58,390 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 20:18:58,419 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 20:18:58,420 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 20:18:58,545 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 20:18:58,558 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 20:18:58,558 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 20:18:58,562 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 08:18:58 BoogieIcfgContainer [2022-03-03 20:18:58,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 20:18:58,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 20:18:58,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 20:18:58,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 20:18:58,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:18:58" (1/2) ... [2022-03-03 20:18:58,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d40346f and model type hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 08:18:58, skipping insertion in model container [2022-03-03 20:18:58,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 08:18:58" (2/2) ... [2022-03-03 20:18:58,571 INFO L111 eAbstractionObserver]: Analyzing ICFG hard1.wvr.bpl [2022-03-03 20:18:58,579 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 20:18:58,579 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 20:18:58,579 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 20:18:58,579 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 20:18:58,633 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-03-03 20:18:58,669 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 20:18:58,682 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 20:18:58,683 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-03-03 20:18:58,693 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2022-03-03 20:18:58,790 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:58,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 20:18:58,810 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:58,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:58,811 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:18:58,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:58,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1576666978, now seen corresponding path program 1 times [2022-03-03 20:18:58,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:58,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947843663] [2022-03-03 20:18:58,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:58,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:58,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:58,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947843663] [2022-03-03 20:18:58,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947843663] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:18:58,915 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:18:58,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-03 20:18:58,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622765284] [2022-03-03 20:18:58,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:18:58,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 20:18:58,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:58,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 20:18:58,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 20:18:58,939 INFO L87 Difference]: Start difference. First operand has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:58,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:58,990 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2022-03-03 20:18:58,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 20:18:58,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 20:18:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:59,008 INFO L225 Difference]: With dead ends: 854 [2022-03-03 20:18:59,008 INFO L226 Difference]: Without dead ends: 823 [2022-03-03 20:18:59,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 20:18:59,012 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:59,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 28 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:18:59,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-03-03 20:18:59,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2022-03-03 20:18:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2022-03-03 20:18:59,138 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2022-03-03 20:18:59,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:59,138 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2022-03-03 20:18:59,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:59,139 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2022-03-03 20:18:59,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 20:18:59,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:59,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:59,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 20:18:59,142 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:18:59,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:59,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1245579906, now seen corresponding path program 1 times [2022-03-03 20:18:59,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:59,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614998520] [2022-03-03 20:18:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:59,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:59,205 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:59,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614998520] [2022-03-03 20:18:59,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614998520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:59,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290380748] [2022-03-03 20:18:59,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:59,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:59,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:59,208 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:18:59,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 20:18:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:59,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-03 20:18:59,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:59,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:59,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290380748] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:59,407 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-03 20:18:59,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 7 [2022-03-03 20:18:59,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325221366] [2022-03-03 20:18:59,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:18:59,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 20:18:59,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:59,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 20:18:59,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-03 20:18:59,409 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:59,491 INFO L93 Difference]: Finished difference Result 1262 states and 4751 transitions. [2022-03-03 20:18:59,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 20:18:59,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 20:18:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:59,501 INFO L225 Difference]: With dead ends: 1262 [2022-03-03 20:18:59,501 INFO L226 Difference]: Without dead ends: 1262 [2022-03-03 20:18:59,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-03 20:18:59,503 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:59,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 30 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:18:59,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2022-03-03 20:18:59,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 692. [2022-03-03 20:18:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.962373371924747) internal successors, (2738), 691 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2738 transitions. [2022-03-03 20:18:59,549 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2738 transitions. Word has length 21 [2022-03-03 20:18:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:59,549 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 2738 transitions. [2022-03-03 20:18:59,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2738 transitions. [2022-03-03 20:18:59,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 20:18:59,552 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:59,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:59,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-03 20:18:59,767 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 [2022-03-03 20:18:59,768 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:18:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:59,769 INFO L85 PathProgramCache]: Analyzing trace with hash 117815332, now seen corresponding path program 1 times [2022-03-03 20:18:59,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:59,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134816719] [2022-03-03 20:18:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:59,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:59,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:59,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134816719] [2022-03-03 20:18:59,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134816719] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:59,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968322787] [2022-03-03 20:18:59,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:59,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:59,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:59,819 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:18:59,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 20:18:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:59,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-03 20:18:59,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:59,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:59,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968322787] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:59,973 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-03 20:18:59,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2022-03-03 20:18:59,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646398881] [2022-03-03 20:18:59,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:18:59,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 20:18:59,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:59,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 20:18:59,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-03-03 20:18:59,975 INFO L87 Difference]: Start difference. First operand 692 states and 2738 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:00,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:00,028 INFO L93 Difference]: Finished difference Result 1343 states and 5074 transitions. [2022-03-03 20:19:00,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 20:19:00,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 20:19:00,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:00,035 INFO L225 Difference]: With dead ends: 1343 [2022-03-03 20:19:00,035 INFO L226 Difference]: Without dead ends: 1343 [2022-03-03 20:19:00,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-03-03 20:19:00,037 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:00,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 29 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:19:00,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2022-03-03 20:19:00,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 797. [2022-03-03 20:19:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 4.006281407035176) internal successors, (3189), 796 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 3189 transitions. [2022-03-03 20:19:00,066 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 3189 transitions. Word has length 21 [2022-03-03 20:19:00,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:00,066 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 3189 transitions. [2022-03-03 20:19:00,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:00,066 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 3189 transitions. [2022-03-03 20:19:00,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 20:19:00,068 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:00,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:00,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:00,271 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,SelfDestructingSolverStorable2 [2022-03-03 20:19:00,272 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:00,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:00,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1519093540, now seen corresponding path program 1 times [2022-03-03 20:19:00,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:00,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949904782] [2022-03-03 20:19:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:00,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:00,321 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:00,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949904782] [2022-03-03 20:19:00,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949904782] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:19:00,322 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:19:00,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 20:19:00,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838171187] [2022-03-03 20:19:00,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:19:00,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 20:19:00,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:00,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 20:19:00,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:19:00,323 INFO L87 Difference]: Start difference. First operand 797 states and 3189 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:00,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:00,391 INFO L93 Difference]: Finished difference Result 1019 states and 3647 transitions. [2022-03-03 20:19:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 20:19:00,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 20:19:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:00,396 INFO L225 Difference]: With dead ends: 1019 [2022-03-03 20:19:00,396 INFO L226 Difference]: Without dead ends: 906 [2022-03-03 20:19:00,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:19:00,400 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:00,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 35 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:19:00,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2022-03-03 20:19:00,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 775. [2022-03-03 20:19:00,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.739018087855297) internal successors, (2894), 774 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:00,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2894 transitions. [2022-03-03 20:19:00,421 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2894 transitions. Word has length 21 [2022-03-03 20:19:00,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:00,422 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2894 transitions. [2022-03-03 20:19:00,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:00,422 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2894 transitions. [2022-03-03 20:19:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 20:19:00,425 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:00,425 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:00,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-03 20:19:00,425 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:00,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:00,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1969827620, now seen corresponding path program 2 times [2022-03-03 20:19:00,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:00,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062034383] [2022-03-03 20:19:00,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:00,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:00,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:00,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062034383] [2022-03-03 20:19:00,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062034383] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:19:00,486 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:19:00,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 20:19:00,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161021479] [2022-03-03 20:19:00,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:19:00,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 20:19:00,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:00,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 20:19:00,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:19:00,487 INFO L87 Difference]: Start difference. First operand 775 states and 2894 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:00,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:00,533 INFO L93 Difference]: Finished difference Result 930 states and 3513 transitions. [2022-03-03 20:19:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 20:19:00,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 20:19:00,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:00,543 INFO L225 Difference]: With dead ends: 930 [2022-03-03 20:19:00,543 INFO L226 Difference]: Without dead ends: 930 [2022-03-03 20:19:00,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:19:00,545 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:00,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 28 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:19:00,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-03-03 20:19:00,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 658. [2022-03-03 20:19:00,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.8158295281582952) internal successors, (2507), 657 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:00,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2507 transitions. [2022-03-03 20:19:00,563 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2507 transitions. Word has length 21 [2022-03-03 20:19:00,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:00,564 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2507 transitions. [2022-03-03 20:19:00,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:00,564 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2507 transitions. [2022-03-03 20:19:00,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:19:00,566 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:00,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:00,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-03 20:19:00,566 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:00,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:00,567 INFO L85 PathProgramCache]: Analyzing trace with hash -229280956, now seen corresponding path program 1 times [2022-03-03 20:19:00,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:00,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379817907] [2022-03-03 20:19:00,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:00,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:00,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:00,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379817907] [2022-03-03 20:19:00,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379817907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:00,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076396108] [2022-03-03 20:19:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:00,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:00,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:00,631 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:00,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 20:19:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:00,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:19:00,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:00,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:00,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076396108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:00,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:00,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2022-03-03 20:19:00,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362509420] [2022-03-03 20:19:00,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:00,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 20:19:00,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:00,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 20:19:00,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-03 20:19:00,812 INFO L87 Difference]: Start difference. First operand 658 states and 2507 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:00,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:00,990 INFO L93 Difference]: Finished difference Result 1938 states and 7091 transitions. [2022-03-03 20:19:00,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:19:00,990 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:19:00,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:00,999 INFO L225 Difference]: With dead ends: 1938 [2022-03-03 20:19:01,000 INFO L226 Difference]: Without dead ends: 1938 [2022-03-03 20:19:01,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:19:01,001 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 142 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:01,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 82 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:19:01,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2022-03-03 20:19:01,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 916. [2022-03-03 20:19:01,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.8) internal successors, (3477), 915 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:01,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3477 transitions. [2022-03-03 20:19:01,029 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3477 transitions. Word has length 23 [2022-03-03 20:19:01,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:01,029 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 3477 transitions. [2022-03-03 20:19:01,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:01,029 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3477 transitions. [2022-03-03 20:19:01,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:19:01,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:01,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:01,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:01,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:01,247 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:01,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:01,248 INFO L85 PathProgramCache]: Analyzing trace with hash 869839812, now seen corresponding path program 1 times [2022-03-03 20:19:01,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:01,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681868748] [2022-03-03 20:19:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:01,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:01,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:01,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681868748] [2022-03-03 20:19:01,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681868748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:01,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607756147] [2022-03-03 20:19:01,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:01,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:01,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:01,317 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:01,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 20:19:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:01,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:19:01,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:01,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:01,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607756147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:01,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:01,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-03 20:19:01,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873013439] [2022-03-03 20:19:01,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:01,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 20:19:01,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:01,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 20:19:01,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-03 20:19:01,518 INFO L87 Difference]: Start difference. First operand 916 states and 3477 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:01,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:01,760 INFO L93 Difference]: Finished difference Result 2103 states and 7751 transitions. [2022-03-03 20:19:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:19:01,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:19:01,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:01,770 INFO L225 Difference]: With dead ends: 2103 [2022-03-03 20:19:01,770 INFO L226 Difference]: Without dead ends: 1818 [2022-03-03 20:19:01,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:19:01,770 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 64 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:01,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 191 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:19:01,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2022-03-03 20:19:01,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1131. [2022-03-03 20:19:01,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 3.842477876106195) internal successors, (4342), 1130 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 4342 transitions. [2022-03-03 20:19:01,800 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 4342 transitions. Word has length 23 [2022-03-03 20:19:01,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:01,800 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 4342 transitions. [2022-03-03 20:19:01,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:01,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 4342 transitions. [2022-03-03 20:19:01,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:19:01,803 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:01,803 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:01,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:02,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:02,025 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:02,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:02,026 INFO L85 PathProgramCache]: Analyzing trace with hash -640056498, now seen corresponding path program 2 times [2022-03-03 20:19:02,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:02,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99744375] [2022-03-03 20:19:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:02,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:02,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:02,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99744375] [2022-03-03 20:19:02,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99744375] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:02,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365043182] [2022-03-03 20:19:02,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:19:02,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:02,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:02,077 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:02,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 20:19:02,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:19:02,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:02,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:19:02,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:02,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:02,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365043182] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:02,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:02,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-03 20:19:02,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128342127] [2022-03-03 20:19:02,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:02,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 20:19:02,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:02,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 20:19:02,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-03 20:19:02,284 INFO L87 Difference]: Start difference. First operand 1131 states and 4342 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) [2022-03-03 20:19:02,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:02,504 INFO L93 Difference]: Finished difference Result 1972 states and 7446 transitions. [2022-03-03 20:19:02,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:19:02,505 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:19:02,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:02,514 INFO L225 Difference]: With dead ends: 1972 [2022-03-03 20:19:02,514 INFO L226 Difference]: Without dead ends: 1887 [2022-03-03 20:19:02,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:19:02,515 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 87 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:02,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 87 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:19:02,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2022-03-03 20:19:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1293. [2022-03-03 20:19:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 3.876934984520124) internal successors, (5009), 1292 states have internal predecessors, (5009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:02,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 5009 transitions. [2022-03-03 20:19:02,559 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 5009 transitions. Word has length 23 [2022-03-03 20:19:02,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:02,559 INFO L470 AbstractCegarLoop]: Abstraction has 1293 states and 5009 transitions. [2022-03-03 20:19:02,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) [2022-03-03 20:19:02,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 5009 transitions. [2022-03-03 20:19:02,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:19:02,563 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:02,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:02,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:02,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:02,779 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:02,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:02,780 INFO L85 PathProgramCache]: Analyzing trace with hash -151839806, now seen corresponding path program 3 times [2022-03-03 20:19:02,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:02,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940351550] [2022-03-03 20:19:02,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:02,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:19:02,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:02,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940351550] [2022-03-03 20:19:02,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940351550] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:02,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685949935] [2022-03-03 20:19:02,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:19:02,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:02,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:02,835 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:02,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 20:19:02,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 20:19:02,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:02,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:19:02,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:19:02,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:19:03,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685949935] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:03,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:03,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-03 20:19:03,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171690993] [2022-03-03 20:19:03,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:03,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 20:19:03,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:03,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 20:19:03,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-03 20:19:03,065 INFO L87 Difference]: Start difference. First operand 1293 states and 5009 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2022-03-03 20:19:03,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:03,244 INFO L93 Difference]: Finished difference Result 2093 states and 7918 transitions. [2022-03-03 20:19:03,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 20:19:03,245 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 23 [2022-03-03 20:19:03,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:03,255 INFO L225 Difference]: With dead ends: 2093 [2022-03-03 20:19:03,255 INFO L226 Difference]: Without dead ends: 2038 [2022-03-03 20:19:03,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-03-03 20:19:03,255 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:03,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 87 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:19:03,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2022-03-03 20:19:03,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1558. [2022-03-03 20:19:03,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1557 states have (on average 3.897880539499037) internal successors, (6069), 1557 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:03,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 6069 transitions. [2022-03-03 20:19:03,293 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 6069 transitions. Word has length 23 [2022-03-03 20:19:03,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:03,293 INFO L470 AbstractCegarLoop]: Abstraction has 1558 states and 6069 transitions. [2022-03-03 20:19:03,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2022-03-03 20:19:03,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 6069 transitions. [2022-03-03 20:19:03,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:19:03,297 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:03,297 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:03,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:03,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:03,513 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:03,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:03,513 INFO L85 PathProgramCache]: Analyzing trace with hash -277999770, now seen corresponding path program 1 times [2022-03-03 20:19:03,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:03,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416726697] [2022-03-03 20:19:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:03,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:03,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:03,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416726697] [2022-03-03 20:19:03,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416726697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:03,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704944718] [2022-03-03 20:19:03,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:03,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:03,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:03,560 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:03,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 20:19:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:03,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:19:03,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:03,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:03,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704944718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:03,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:03,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-03 20:19:03,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014606109] [2022-03-03 20:19:03,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:03,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 20:19:03,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:03,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 20:19:03,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-03 20:19:03,737 INFO L87 Difference]: Start difference. First operand 1558 states and 6069 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:03,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:03,886 INFO L93 Difference]: Finished difference Result 3079 states and 11859 transitions. [2022-03-03 20:19:03,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 20:19:03,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:19:03,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:03,897 INFO L225 Difference]: With dead ends: 3079 [2022-03-03 20:19:03,897 INFO L226 Difference]: Without dead ends: 3024 [2022-03-03 20:19:03,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-03 20:19:03,897 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 68 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:03,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 151 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:19:03,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2022-03-03 20:19:03,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 1833. [2022-03-03 20:19:03,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.99617903930131) internal successors, (7321), 1832 states have internal predecessors, (7321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 7321 transitions. [2022-03-03 20:19:03,949 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 7321 transitions. Word has length 23 [2022-03-03 20:19:03,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:03,949 INFO L470 AbstractCegarLoop]: Abstraction has 1833 states and 7321 transitions. [2022-03-03 20:19:03,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:03,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 7321 transitions. [2022-03-03 20:19:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:19:03,953 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:03,953 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:03,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:04,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:04,167 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:04,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:04,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1737160546, now seen corresponding path program 2 times [2022-03-03 20:19:04,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:04,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846753347] [2022-03-03 20:19:04,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:04,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:19:04,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:04,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846753347] [2022-03-03 20:19:04,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846753347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:04,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623244856] [2022-03-03 20:19:04,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:19:04,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:04,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:04,208 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:04,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 20:19:04,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:19:04,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:04,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:19:04,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:19:04,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:19:04,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623244856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:04,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:04,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-03 20:19:04,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272917992] [2022-03-03 20:19:04,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:04,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 20:19:04,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:04,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 20:19:04,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-03 20:19:04,422 INFO L87 Difference]: Start difference. First operand 1833 states and 7321 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2022-03-03 20:19:04,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:04,590 INFO L93 Difference]: Finished difference Result 2822 states and 11041 transitions. [2022-03-03 20:19:04,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 20:19:04,591 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 23 [2022-03-03 20:19:04,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:04,598 INFO L225 Difference]: With dead ends: 2822 [2022-03-03 20:19:04,599 INFO L226 Difference]: Without dead ends: 2704 [2022-03-03 20:19:04,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:19:04,599 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 76 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:04,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 124 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:19:04,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2022-03-03 20:19:04,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2151. [2022-03-03 20:19:04,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2150 states have (on average 4.050697674418605) internal successors, (8709), 2150 states have internal predecessors, (8709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:04,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 8709 transitions. [2022-03-03 20:19:04,659 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 8709 transitions. Word has length 23 [2022-03-03 20:19:04,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:04,660 INFO L470 AbstractCegarLoop]: Abstraction has 2151 states and 8709 transitions. [2022-03-03 20:19:04,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2022-03-03 20:19:04,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 8709 transitions. [2022-03-03 20:19:04,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:19:04,664 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:04,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:04,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:04,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-03 20:19:04,880 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:04,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:04,881 INFO L85 PathProgramCache]: Analyzing trace with hash 786210190, now seen corresponding path program 3 times [2022-03-03 20:19:04,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:04,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121937406] [2022-03-03 20:19:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:04,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:19:04,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:04,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121937406] [2022-03-03 20:19:04,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121937406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:04,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651309298] [2022-03-03 20:19:04,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:19:04,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:04,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:04,918 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:04,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 20:19:04,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 20:19:04,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:04,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:19:04,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:19:04,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:19:05,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651309298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:05,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:05,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-03 20:19:05,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829516062] [2022-03-03 20:19:05,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:05,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 20:19:05,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:05,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 20:19:05,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-03 20:19:05,094 INFO L87 Difference]: Start difference. First operand 2151 states and 8709 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2022-03-03 20:19:05,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:05,261 INFO L93 Difference]: Finished difference Result 3397 states and 13566 transitions. [2022-03-03 20:19:05,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 20:19:05,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 23 [2022-03-03 20:19:05,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:05,271 INFO L225 Difference]: With dead ends: 3397 [2022-03-03 20:19:05,272 INFO L226 Difference]: Without dead ends: 3342 [2022-03-03 20:19:05,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:19:05,272 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 64 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:05,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 125 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:19:05,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2022-03-03 20:19:05,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 2343. [2022-03-03 20:19:05,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 4.122544833475662) internal successors, (9655), 2342 states have internal predecessors, (9655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:05,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 9655 transitions. [2022-03-03 20:19:05,339 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 9655 transitions. Word has length 23 [2022-03-03 20:19:05,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:05,339 INFO L470 AbstractCegarLoop]: Abstraction has 2343 states and 9655 transitions. [2022-03-03 20:19:05,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2022-03-03 20:19:05,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 9655 transitions. [2022-03-03 20:19:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:19:05,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:05,345 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:05,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:05,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:05,562 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:05,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:05,562 INFO L85 PathProgramCache]: Analyzing trace with hash 33636326, now seen corresponding path program 1 times [2022-03-03 20:19:05,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:05,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916163133] [2022-03-03 20:19:05,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:05,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:05,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:05,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916163133] [2022-03-03 20:19:05,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916163133] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:19:05,597 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:19:05,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 20:19:05,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824841470] [2022-03-03 20:19:05,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:19:05,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 20:19:05,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:05,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 20:19:05,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:19:05,598 INFO L87 Difference]: Start difference. First operand 2343 states and 9655 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:05,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:05,658 INFO L93 Difference]: Finished difference Result 2180 states and 8842 transitions. [2022-03-03 20:19:05,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 20:19:05,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:19:05,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:05,664 INFO L225 Difference]: With dead ends: 2180 [2022-03-03 20:19:05,664 INFO L226 Difference]: Without dead ends: 2137 [2022-03-03 20:19:05,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:19:05,664 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:05,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 24 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:19:05,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2022-03-03 20:19:05,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1749. [2022-03-03 20:19:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 4.060640732265446) internal successors, (7098), 1748 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:05,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 7098 transitions. [2022-03-03 20:19:05,708 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 7098 transitions. Word has length 23 [2022-03-03 20:19:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:05,708 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 7098 transitions. [2022-03-03 20:19:05,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 7098 transitions. [2022-03-03 20:19:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:19:05,712 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:05,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:05,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-03 20:19:05,712 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:05,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:05,712 INFO L85 PathProgramCache]: Analyzing trace with hash -25922294, now seen corresponding path program 2 times [2022-03-03 20:19:05,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:05,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524004643] [2022-03-03 20:19:05,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:05,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:05,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:05,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524004643] [2022-03-03 20:19:05,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524004643] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:05,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805819420] [2022-03-03 20:19:05,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:19:05,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:05,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:05,735 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:05,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 20:19:05,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:19:05,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:05,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:19:05,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:05,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:05,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805819420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:05,915 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:05,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-03-03 20:19:05,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156734882] [2022-03-03 20:19:05,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:05,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:19:05,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:05,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:19:05,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:19:05,916 INFO L87 Difference]: Start difference. First operand 1749 states and 7098 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:06,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:06,163 INFO L93 Difference]: Finished difference Result 4870 states and 18610 transitions. [2022-03-03 20:19:06,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 20:19:06,163 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:19:06,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:06,177 INFO L225 Difference]: With dead ends: 4870 [2022-03-03 20:19:06,177 INFO L226 Difference]: Without dead ends: 4870 [2022-03-03 20:19:06,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:19:06,178 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 242 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:06,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 101 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:19:06,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4870 states. [2022-03-03 20:19:06,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4870 to 2341. [2022-03-03 20:19:06,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 2340 states have (on average 4.21025641025641) internal successors, (9852), 2340 states have internal predecessors, (9852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:06,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 9852 transitions. [2022-03-03 20:19:06,245 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 9852 transitions. Word has length 23 [2022-03-03 20:19:06,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:06,245 INFO L470 AbstractCegarLoop]: Abstraction has 2341 states and 9852 transitions. [2022-03-03 20:19:06,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:06,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 9852 transitions. [2022-03-03 20:19:06,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:19:06,251 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:06,251 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:06,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:06,467 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 [2022-03-03 20:19:06,467 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:06,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:06,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1475647550, now seen corresponding path program 3 times [2022-03-03 20:19:06,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:06,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438362298] [2022-03-03 20:19:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:06,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:06,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:06,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438362298] [2022-03-03 20:19:06,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438362298] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:06,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939478259] [2022-03-03 20:19:06,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:19:06,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:06,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:06,496 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:06,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 20:19:06,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 20:19:06,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:06,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:19:06,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:06,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:06,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939478259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:06,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:06,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-03-03 20:19:06,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787759468] [2022-03-03 20:19:06,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:06,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:19:06,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:06,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:19:06,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:19:06,657 INFO L87 Difference]: Start difference. First operand 2341 states and 9852 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:06,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:06,913 INFO L93 Difference]: Finished difference Result 4654 states and 18685 transitions. [2022-03-03 20:19:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 20:19:06,913 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:19:06,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:06,926 INFO L225 Difference]: With dead ends: 4654 [2022-03-03 20:19:06,926 INFO L226 Difference]: Without dead ends: 4654 [2022-03-03 20:19:06,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:19:06,926 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 266 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:06,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 62 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:19:06,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2022-03-03 20:19:06,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 2562. [2022-03-03 20:19:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2562 states, 2561 states have (on average 4.310035142522453) internal successors, (11038), 2561 states have internal predecessors, (11038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:06,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 11038 transitions. [2022-03-03 20:19:06,990 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 11038 transitions. Word has length 23 [2022-03-03 20:19:06,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:06,991 INFO L470 AbstractCegarLoop]: Abstraction has 2562 states and 11038 transitions. [2022-03-03 20:19:06,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:06,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 11038 transitions. [2022-03-03 20:19:06,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:19:06,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:06,996 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:07,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:07,212 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 [2022-03-03 20:19:07,212 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:07,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:07,213 INFO L85 PathProgramCache]: Analyzing trace with hash 970212618, now seen corresponding path program 2 times [2022-03-03 20:19:07,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:07,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393480214] [2022-03-03 20:19:07,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:07,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:07,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:07,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393480214] [2022-03-03 20:19:07,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393480214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:07,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822659932] [2022-03-03 20:19:07,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:19:07,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:07,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:07,235 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:07,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 20:19:07,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:19:07,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:07,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:19:07,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:07,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:07,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822659932] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:07,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:07,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2022-03-03 20:19:07,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647892666] [2022-03-03 20:19:07,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:07,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 20:19:07,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:07,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 20:19:07,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-03 20:19:07,378 INFO L87 Difference]: Start difference. First operand 2562 states and 11038 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:07,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:07,546 INFO L93 Difference]: Finished difference Result 4928 states and 20191 transitions. [2022-03-03 20:19:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:19:07,546 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:19:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:07,562 INFO L225 Difference]: With dead ends: 4928 [2022-03-03 20:19:07,562 INFO L226 Difference]: Without dead ends: 4928 [2022-03-03 20:19:07,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:19:07,563 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 113 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:07,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 87 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:19:07,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2022-03-03 20:19:07,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 2970. [2022-03-03 20:19:07,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 4.287638935668575) internal successors, (12730), 2969 states have internal predecessors, (12730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:07,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 12730 transitions. [2022-03-03 20:19:07,640 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 12730 transitions. Word has length 23 [2022-03-03 20:19:07,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:07,641 INFO L470 AbstractCegarLoop]: Abstraction has 2970 states and 12730 transitions. [2022-03-03 20:19:07,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:07,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 12730 transitions. [2022-03-03 20:19:07,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:19:07,647 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:07,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:07,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:07,863 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 [2022-03-03 20:19:07,864 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:07,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:07,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1118399754, now seen corresponding path program 3 times [2022-03-03 20:19:07,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:07,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470214315] [2022-03-03 20:19:07,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:07,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:07,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:07,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470214315] [2022-03-03 20:19:07,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470214315] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:07,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231775186] [2022-03-03 20:19:07,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:19:07,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:07,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:07,884 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:07,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 20:19:07,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:19:07,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:07,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:19:07,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:07,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:08,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231775186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:08,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:08,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-03-03 20:19:08,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892525949] [2022-03-03 20:19:08,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:08,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:19:08,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:08,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:19:08,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:19:08,035 INFO L87 Difference]: Start difference. First operand 2970 states and 12730 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:08,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:08,295 INFO L93 Difference]: Finished difference Result 7558 states and 30662 transitions. [2022-03-03 20:19:08,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 20:19:08,295 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:19:08,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:08,314 INFO L225 Difference]: With dead ends: 7558 [2022-03-03 20:19:08,314 INFO L226 Difference]: Without dead ends: 7558 [2022-03-03 20:19:08,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:19:08,314 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 187 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:08,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 120 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:19:08,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7558 states. [2022-03-03 20:19:08,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7558 to 4354. [2022-03-03 20:19:08,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 4353 states have (on average 4.402940500804043) internal successors, (19166), 4353 states have internal predecessors, (19166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:08,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 19166 transitions. [2022-03-03 20:19:08,439 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 19166 transitions. Word has length 23 [2022-03-03 20:19:08,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:08,439 INFO L470 AbstractCegarLoop]: Abstraction has 4354 states and 19166 transitions. [2022-03-03 20:19:08,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:08,439 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 19166 transitions. [2022-03-03 20:19:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:19:08,448 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:08,448 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:08,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:08,663 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 [2022-03-03 20:19:08,663 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:08,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:08,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1188293318, now seen corresponding path program 4 times [2022-03-03 20:19:08,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:08,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015394840] [2022-03-03 20:19:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:08,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:08,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:08,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015394840] [2022-03-03 20:19:08,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015394840] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:08,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251338043] [2022-03-03 20:19:08,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:19:08,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:08,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:08,686 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:08,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 20:19:08,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:19:08,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:08,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:19:08,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:08,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:08,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251338043] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:08,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:08,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-03-03 20:19:08,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661599792] [2022-03-03 20:19:08,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:08,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:19:08,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:08,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:19:08,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:19:08,859 INFO L87 Difference]: Start difference. First operand 4354 states and 19166 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:09,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:09,165 INFO L93 Difference]: Finished difference Result 7822 states and 32925 transitions. [2022-03-03 20:19:09,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 20:19:09,165 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:19:09,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:09,185 INFO L225 Difference]: With dead ends: 7822 [2022-03-03 20:19:09,185 INFO L226 Difference]: Without dead ends: 7822 [2022-03-03 20:19:09,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:19:09,186 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 184 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:09,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 77 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:19:09,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7822 states. [2022-03-03 20:19:09,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7822 to 4648. [2022-03-03 20:19:09,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 4647 states have (on average 4.46460081773187) internal successors, (20747), 4647 states have internal predecessors, (20747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:09,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 20747 transitions. [2022-03-03 20:19:09,324 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 20747 transitions. Word has length 23 [2022-03-03 20:19:09,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:09,324 INFO L470 AbstractCegarLoop]: Abstraction has 4648 states and 20747 transitions. [2022-03-03 20:19:09,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:09,324 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 20747 transitions. [2022-03-03 20:19:09,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:19:09,334 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:09,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:09,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:09,551 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 [2022-03-03 20:19:09,551 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:09,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:09,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1541563518, now seen corresponding path program 4 times [2022-03-03 20:19:09,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:09,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142193934] [2022-03-03 20:19:09,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:09,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:09,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:09,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142193934] [2022-03-03 20:19:09,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142193934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:09,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310046875] [2022-03-03 20:19:09,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:19:09,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:09,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:09,584 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:09,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 20:19:09,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:19:09,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:09,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:19:09,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:09,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:09,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310046875] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:09,797 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-03 20:19:09,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-03-03 20:19:09,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319921070] [2022-03-03 20:19:09,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:19:09,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 20:19:09,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:09,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 20:19:09,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:19:09,797 INFO L87 Difference]: Start difference. First operand 4648 states and 20747 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:10,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:10,014 INFO L93 Difference]: Finished difference Result 7073 states and 30775 transitions. [2022-03-03 20:19:10,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 20:19:10,014 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:19:10,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:10,032 INFO L225 Difference]: With dead ends: 7073 [2022-03-03 20:19:10,032 INFO L226 Difference]: Without dead ends: 7073 [2022-03-03 20:19:10,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:19:10,033 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:10,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 59 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:19:10,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7073 states. [2022-03-03 20:19:10,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7073 to 4730. [2022-03-03 20:19:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4730 states, 4729 states have (on average 4.45760203002749) internal successors, (21080), 4729 states have internal predecessors, (21080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:10,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 21080 transitions. [2022-03-03 20:19:10,134 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 21080 transitions. Word has length 25 [2022-03-03 20:19:10,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:10,134 INFO L470 AbstractCegarLoop]: Abstraction has 4730 states and 21080 transitions. [2022-03-03 20:19:10,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:10,135 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 21080 transitions. [2022-03-03 20:19:10,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:19:10,144 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:10,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:10,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-03 20:19:10,359 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 [2022-03-03 20:19:10,360 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:10,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:10,360 INFO L85 PathProgramCache]: Analyzing trace with hash -231361658, now seen corresponding path program 4 times [2022-03-03 20:19:10,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:10,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922742743] [2022-03-03 20:19:10,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:10,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:10,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:10,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922742743] [2022-03-03 20:19:10,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922742743] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:10,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642267000] [2022-03-03 20:19:10,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:19:10,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:10,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:10,407 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:10,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 20:19:10,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:19:10,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:10,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 20:19:10,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:10,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:10,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642267000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:10,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:10,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-03 20:19:10,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037256073] [2022-03-03 20:19:10,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:10,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 20:19:10,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:10,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 20:19:10,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:19:10,599 INFO L87 Difference]: Start difference. First operand 4730 states and 21080 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:10,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:10,933 INFO L93 Difference]: Finished difference Result 6959 states and 29620 transitions. [2022-03-03 20:19:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 20:19:10,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:19:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:10,953 INFO L225 Difference]: With dead ends: 6959 [2022-03-03 20:19:10,954 INFO L226 Difference]: Without dead ends: 6862 [2022-03-03 20:19:10,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:19:10,956 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 116 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:10,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 384 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:19:10,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6862 states. [2022-03-03 20:19:11,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6862 to 5203. [2022-03-03 20:19:11,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5203 states, 5202 states have (on average 4.448289119569396) internal successors, (23140), 5202 states have internal predecessors, (23140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5203 states to 5203 states and 23140 transitions. [2022-03-03 20:19:11,092 INFO L78 Accepts]: Start accepts. Automaton has 5203 states and 23140 transitions. Word has length 25 [2022-03-03 20:19:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:11,093 INFO L470 AbstractCegarLoop]: Abstraction has 5203 states and 23140 transitions. [2022-03-03 20:19:11,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:11,093 INFO L276 IsEmpty]: Start isEmpty. Operand 5203 states and 23140 transitions. [2022-03-03 20:19:11,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:19:11,105 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:11,105 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:11,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:11,319 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 [2022-03-03 20:19:11,319 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:11,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:11,320 INFO L85 PathProgramCache]: Analyzing trace with hash 867759110, now seen corresponding path program 1 times [2022-03-03 20:19:11,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:11,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005608922] [2022-03-03 20:19:11,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:11,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:11,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:11,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005608922] [2022-03-03 20:19:11,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005608922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:11,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893456885] [2022-03-03 20:19:11,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:11,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:11,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:11,349 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:11,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:19:11,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:11,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 20:19:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:11,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:11,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893456885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:11,576 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:11,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2022-03-03 20:19:11,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254509034] [2022-03-03 20:19:11,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:11,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:19:11,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:11,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:19:11,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:19:11,577 INFO L87 Difference]: Start difference. First operand 5203 states and 23140 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:12,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:12,336 INFO L93 Difference]: Finished difference Result 16617 states and 68830 transitions. [2022-03-03 20:19:12,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 20:19:12,337 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:19:12,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:12,384 INFO L225 Difference]: With dead ends: 16617 [2022-03-03 20:19:12,384 INFO L226 Difference]: Without dead ends: 16551 [2022-03-03 20:19:12,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=442, Invalid=890, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 20:19:12,385 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 487 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:12,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 179 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:19:12,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16551 states. [2022-03-03 20:19:12,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16551 to 7204. [2022-03-03 20:19:12,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7204 states, 7203 states have (on average 4.527974455088158) internal successors, (32615), 7203 states have internal predecessors, (32615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7204 states to 7204 states and 32615 transitions. [2022-03-03 20:19:12,648 INFO L78 Accepts]: Start accepts. Automaton has 7204 states and 32615 transitions. Word has length 25 [2022-03-03 20:19:12,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:12,649 INFO L470 AbstractCegarLoop]: Abstraction has 7204 states and 32615 transitions. [2022-03-03 20:19:12,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:12,649 INFO L276 IsEmpty]: Start isEmpty. Operand 7204 states and 32615 transitions. [2022-03-03 20:19:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:19:12,664 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:12,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:12,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-03 20:19:12,867 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 [2022-03-03 20:19:12,867 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:12,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:12,868 INFO L85 PathProgramCache]: Analyzing trace with hash 937652674, now seen corresponding path program 2 times [2022-03-03 20:19:12,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:12,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783402341] [2022-03-03 20:19:12,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:12,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:12,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:12,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783402341] [2022-03-03 20:19:12,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783402341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:12,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103861863] [2022-03-03 20:19:12,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:19:12,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:12,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:12,899 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:12,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 20:19:12,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:19:12,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:12,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:19:12,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:12,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:13,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:13,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103861863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:13,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:13,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2022-03-03 20:19:13,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854654488] [2022-03-03 20:19:13,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:13,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:19:13,139 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:13,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:19:13,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:19:13,139 INFO L87 Difference]: Start difference. First operand 7204 states and 32615 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:13,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:13,895 INFO L93 Difference]: Finished difference Result 15330 states and 66058 transitions. [2022-03-03 20:19:13,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 20:19:13,895 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:19:13,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:13,940 INFO L225 Difference]: With dead ends: 15330 [2022-03-03 20:19:13,940 INFO L226 Difference]: Without dead ends: 15330 [2022-03-03 20:19:13,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=505, Invalid=977, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 20:19:13,941 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 542 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:13,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 143 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:19:13,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15330 states. [2022-03-03 20:19:14,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15330 to 9308. [2022-03-03 20:19:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9308 states, 9307 states have (on average 4.566562802191899) internal successors, (42501), 9307 states have internal predecessors, (42501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9308 states to 9308 states and 42501 transitions. [2022-03-03 20:19:14,262 INFO L78 Accepts]: Start accepts. Automaton has 9308 states and 42501 transitions. Word has length 25 [2022-03-03 20:19:14,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:14,262 INFO L470 AbstractCegarLoop]: Abstraction has 9308 states and 42501 transitions. [2022-03-03 20:19:14,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 9308 states and 42501 transitions. [2022-03-03 20:19:14,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:19:14,283 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:14,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:14,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-03 20:19:14,484 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 [2022-03-03 20:19:14,484 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:14,484 INFO L85 PathProgramCache]: Analyzing trace with hash 599012682, now seen corresponding path program 3 times [2022-03-03 20:19:14,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:14,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008665551] [2022-03-03 20:19:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:14,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:14,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:14,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008665551] [2022-03-03 20:19:14,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008665551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:14,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262120742] [2022-03-03 20:19:14,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:19:14,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:14,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:14,545 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:14,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 20:19:14,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 20:19:14,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:14,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 20:19:14,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:14,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:14,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262120742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:14,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:14,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-03-03 20:19:14,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081877825] [2022-03-03 20:19:14,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:14,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 20:19:14,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:14,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 20:19:14,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:19:14,918 INFO L87 Difference]: Start difference. First operand 9308 states and 42501 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:16,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:16,410 INFO L93 Difference]: Finished difference Result 43349 states and 187926 transitions. [2022-03-03 20:19:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 20:19:16,410 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:19:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:16,644 INFO L225 Difference]: With dead ends: 43349 [2022-03-03 20:19:16,644 INFO L226 Difference]: Without dead ends: 43226 [2022-03-03 20:19:16,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1109, Invalid=2673, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 20:19:16,645 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 890 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:16,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 196 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:19:16,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43226 states. [2022-03-03 20:19:17,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43226 to 18163. [2022-03-03 20:19:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18163 states, 18162 states have (on average 4.662482105494989) internal successors, (84680), 18162 states have internal predecessors, (84680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:17,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18163 states to 18163 states and 84680 transitions. [2022-03-03 20:19:17,590 INFO L78 Accepts]: Start accepts. Automaton has 18163 states and 84680 transitions. Word has length 25 [2022-03-03 20:19:17,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:17,590 INFO L470 AbstractCegarLoop]: Abstraction has 18163 states and 84680 transitions. [2022-03-03 20:19:17,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:17,590 INFO L276 IsEmpty]: Start isEmpty. Operand 18163 states and 84680 transitions. [2022-03-03 20:19:17,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:19:17,651 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:17,651 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:17,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:17,853 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 [2022-03-03 20:19:17,853 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:17,854 INFO L85 PathProgramCache]: Analyzing trace with hash 816040672, now seen corresponding path program 4 times [2022-03-03 20:19:17,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:17,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290821683] [2022-03-03 20:19:17,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:17,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:17,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:17,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290821683] [2022-03-03 20:19:17,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290821683] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:17,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062386748] [2022-03-03 20:19:17,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:19:17,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:17,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:17,989 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:17,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 20:19:18,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:19:18,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:18,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 20:19:18,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:18,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:18,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062386748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:18,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:18,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-03-03 20:19:18,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139310318] [2022-03-03 20:19:18,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:18,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 20:19:18,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:18,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 20:19:18,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:19:18,323 INFO L87 Difference]: Start difference. First operand 18163 states and 84680 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:19,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:19,875 INFO L93 Difference]: Finished difference Result 42110 states and 182030 transitions. [2022-03-03 20:19:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 20:19:19,875 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:19:19,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:20,042 INFO L225 Difference]: With dead ends: 42110 [2022-03-03 20:19:20,042 INFO L226 Difference]: Without dead ends: 41954 [2022-03-03 20:19:20,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1036, Invalid=2746, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 20:19:20,043 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 701 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:20,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 273 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:19:20,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41954 states. [2022-03-03 20:19:20,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41954 to 19283. [2022-03-03 20:19:20,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19283 states, 19282 states have (on average 4.627476402862774) internal successors, (89227), 19282 states have internal predecessors, (89227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:20,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19283 states to 19283 states and 89227 transitions. [2022-03-03 20:19:20,907 INFO L78 Accepts]: Start accepts. Automaton has 19283 states and 89227 transitions. Word has length 25 [2022-03-03 20:19:20,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:20,907 INFO L470 AbstractCegarLoop]: Abstraction has 19283 states and 89227 transitions. [2022-03-03 20:19:20,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:20,907 INFO L276 IsEmpty]: Start isEmpty. Operand 19283 states and 89227 transitions. [2022-03-03 20:19:20,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:19:20,954 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:20,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:20,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-03 20:19:21,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-03 20:19:21,155 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:21,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:21,155 INFO L85 PathProgramCache]: Analyzing trace with hash -249609790, now seen corresponding path program 5 times [2022-03-03 20:19:21,155 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:21,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081554438] [2022-03-03 20:19:21,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:21,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:21,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:21,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081554438] [2022-03-03 20:19:21,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081554438] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:21,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151097846] [2022-03-03 20:19:21,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:19:21,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:21,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:21,243 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:21,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 20:19:21,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:19:21,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:21,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 20:19:21,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:21,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:21,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151097846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:21,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:21,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:19:21,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338300281] [2022-03-03 20:19:21,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:21,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:19:21,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:21,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:19:21,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:19:21,755 INFO L87 Difference]: Start difference. First operand 19283 states and 89227 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:23,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:23,547 INFO L93 Difference]: Finished difference Result 40327 states and 177681 transitions. [2022-03-03 20:19:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 20:19:23,548 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:19:23,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:23,715 INFO L225 Difference]: With dead ends: 40327 [2022-03-03 20:19:23,715 INFO L226 Difference]: Without dead ends: 40123 [2022-03-03 20:19:23,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=498, Invalid=1224, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 20:19:23,716 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 392 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:23,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 225 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:19:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40123 states. [2022-03-03 20:19:24,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40123 to 20179. [2022-03-03 20:19:24,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20179 states, 20178 states have (on average 4.661116067003667) internal successors, (94052), 20178 states have internal predecessors, (94052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20179 states to 20179 states and 94052 transitions. [2022-03-03 20:19:24,674 INFO L78 Accepts]: Start accepts. Automaton has 20179 states and 94052 transitions. Word has length 25 [2022-03-03 20:19:24,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:24,674 INFO L470 AbstractCegarLoop]: Abstraction has 20179 states and 94052 transitions. [2022-03-03 20:19:24,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:24,675 INFO L276 IsEmpty]: Start isEmpty. Operand 20179 states and 94052 transitions. [2022-03-03 20:19:24,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:19:24,721 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:24,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:24,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:24,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-03 20:19:24,922 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:24,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:24,922 INFO L85 PathProgramCache]: Analyzing trace with hash -629764328, now seen corresponding path program 6 times [2022-03-03 20:19:24,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:24,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226799756] [2022-03-03 20:19:24,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:24,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:24,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:24,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226799756] [2022-03-03 20:19:24,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226799756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:24,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63361888] [2022-03-03 20:19:24,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:19:24,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:24,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:25,000 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:25,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 20:19:25,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:19:25,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:25,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 20:19:25,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:25,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:25,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63361888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:25,505 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:25,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:19:25,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859780739] [2022-03-03 20:19:25,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:25,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:19:25,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:25,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:19:25,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:19:25,506 INFO L87 Difference]: Start difference. First operand 20179 states and 94052 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:27,556 INFO L93 Difference]: Finished difference Result 39840 states and 175243 transitions. [2022-03-03 20:19:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:19:27,556 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:19:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:27,696 INFO L225 Difference]: With dead ends: 39840 [2022-03-03 20:19:27,696 INFO L226 Difference]: Without dead ends: 38961 [2022-03-03 20:19:27,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=604, Invalid=1748, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 20:19:27,697 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 423 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:27,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 301 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:19:27,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38961 states. [2022-03-03 20:19:28,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38961 to 20002. [2022-03-03 20:19:28,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20002 states, 20001 states have (on average 4.644417779111045) internal successors, (92893), 20001 states have internal predecessors, (92893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:28,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20002 states to 20002 states and 92893 transitions. [2022-03-03 20:19:28,531 INFO L78 Accepts]: Start accepts. Automaton has 20002 states and 92893 transitions. Word has length 25 [2022-03-03 20:19:28,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:28,531 INFO L470 AbstractCegarLoop]: Abstraction has 20002 states and 92893 transitions. [2022-03-03 20:19:28,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:28,531 INFO L276 IsEmpty]: Start isEmpty. Operand 20002 states and 92893 transitions. [2022-03-03 20:19:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:19:28,584 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:28,584 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:28,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:28,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-03 20:19:28,791 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:28,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:28,791 INFO L85 PathProgramCache]: Analyzing trace with hash 50816006, now seen corresponding path program 7 times [2022-03-03 20:19:28,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:28,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088628480] [2022-03-03 20:19:28,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:28,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:28,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:28,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088628480] [2022-03-03 20:19:28,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088628480] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:28,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140523640] [2022-03-03 20:19:28,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:19:28,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:28,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:28,846 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:28,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 20:19:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:28,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 20:19:28,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:28,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:29,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140523640] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:29,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:29,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-03-03 20:19:29,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862552598] [2022-03-03 20:19:29,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:29,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 20:19:29,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:29,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 20:19:29,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:19:29,168 INFO L87 Difference]: Start difference. First operand 20002 states and 92893 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:30,456 INFO L93 Difference]: Finished difference Result 52489 states and 232133 transitions. [2022-03-03 20:19:30,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 20:19:30,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:19:30,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:30,847 INFO L225 Difference]: With dead ends: 52489 [2022-03-03 20:19:30,847 INFO L226 Difference]: Without dead ends: 52306 [2022-03-03 20:19:30,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=573, Invalid=1407, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 20:19:30,848 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 663 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:30,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 283 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:19:30,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52306 states. [2022-03-03 20:19:31,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52306 to 25506. [2022-03-03 20:19:31,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25506 states, 25505 states have (on average 4.6938639482454425) internal successors, (119717), 25505 states have internal predecessors, (119717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:31,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25506 states to 25506 states and 119717 transitions. [2022-03-03 20:19:31,963 INFO L78 Accepts]: Start accepts. Automaton has 25506 states and 119717 transitions. Word has length 25 [2022-03-03 20:19:31,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:31,963 INFO L470 AbstractCegarLoop]: Abstraction has 25506 states and 119717 transitions. [2022-03-03 20:19:31,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:31,963 INFO L276 IsEmpty]: Start isEmpty. Operand 25506 states and 119717 transitions. [2022-03-03 20:19:32,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:19:32,033 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:32,033 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:32,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:32,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:32,247 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:32,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:32,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2095354754, now seen corresponding path program 8 times [2022-03-03 20:19:32,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:32,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668972794] [2022-03-03 20:19:32,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:32,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:32,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:32,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668972794] [2022-03-03 20:19:32,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668972794] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:32,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870291113] [2022-03-03 20:19:32,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:19:32,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:32,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:32,324 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:32,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 20:19:32,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:19:32,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:32,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 20:19:32,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:32,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:33,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870291113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:33,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:33,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:19:33,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017144459] [2022-03-03 20:19:33,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:33,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:19:33,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:33,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:19:33,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:19:33,033 INFO L87 Difference]: Start difference. First operand 25506 states and 119717 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:34,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:34,900 INFO L93 Difference]: Finished difference Result 47186 states and 211684 transitions. [2022-03-03 20:19:34,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 20:19:34,900 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:19:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:35,087 INFO L225 Difference]: With dead ends: 47186 [2022-03-03 20:19:35,087 INFO L226 Difference]: Without dead ends: 46797 [2022-03-03 20:19:35,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 20:19:35,088 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 362 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1819 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:35,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 392 Invalid, 1928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1819 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 20:19:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46797 states. [2022-03-03 20:19:35,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46797 to 25503. [2022-03-03 20:19:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25503 states, 25502 states have (on average 4.692965257626853) internal successors, (119680), 25502 states have internal predecessors, (119680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25503 states to 25503 states and 119680 transitions. [2022-03-03 20:19:36,046 INFO L78 Accepts]: Start accepts. Automaton has 25503 states and 119680 transitions. Word has length 25 [2022-03-03 20:19:36,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:36,046 INFO L470 AbstractCegarLoop]: Abstraction has 25503 states and 119680 transitions. [2022-03-03 20:19:36,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:36,046 INFO L276 IsEmpty]: Start isEmpty. Operand 25503 states and 119680 transitions. [2022-03-03 20:19:36,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:19:36,115 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:36,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:36,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:36,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-03 20:19:36,315 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:36,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:36,316 INFO L85 PathProgramCache]: Analyzing trace with hash 863019782, now seen corresponding path program 1 times [2022-03-03 20:19:36,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:36,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582604470] [2022-03-03 20:19:36,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:36,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:36,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:36,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582604470] [2022-03-03 20:19:36,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582604470] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:36,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046934] [2022-03-03 20:19:36,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:36,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:36,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:36,344 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:36,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 20:19:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:36,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:19:36,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:36,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:36,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:36,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046934] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:36,727 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-03 20:19:36,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 6] total 14 [2022-03-03 20:19:36,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011712316] [2022-03-03 20:19:36,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:19:36,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 20:19:36,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:36,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 20:19:36,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:19:36,728 INFO L87 Difference]: Start difference. First operand 25503 states and 119680 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:37,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:37,211 INFO L93 Difference]: Finished difference Result 30985 states and 143944 transitions. [2022-03-03 20:19:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 20:19:37,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:19:37,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:37,337 INFO L225 Difference]: With dead ends: 30985 [2022-03-03 20:19:37,337 INFO L226 Difference]: Without dead ends: 30967 [2022-03-03 20:19:37,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:19:37,338 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 99 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:37,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 36 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:19:37,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30967 states. [2022-03-03 20:19:37,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30967 to 25809. [2022-03-03 20:19:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25809 states, 25808 states have (on average 4.691568505889647) internal successors, (121080), 25808 states have internal predecessors, (121080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:38,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25809 states to 25809 states and 121080 transitions. [2022-03-03 20:19:38,048 INFO L78 Accepts]: Start accepts. Automaton has 25809 states and 121080 transitions. Word has length 25 [2022-03-03 20:19:38,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:38,048 INFO L470 AbstractCegarLoop]: Abstraction has 25809 states and 121080 transitions. [2022-03-03 20:19:38,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:38,048 INFO L276 IsEmpty]: Start isEmpty. Operand 25809 states and 121080 transitions. [2022-03-03 20:19:38,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:19:38,113 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:38,113 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:38,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:38,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-03 20:19:38,314 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:38,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:38,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1313753862, now seen corresponding path program 2 times [2022-03-03 20:19:38,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:38,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157118603] [2022-03-03 20:19:38,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:38,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:38,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:38,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157118603] [2022-03-03 20:19:38,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157118603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:38,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770503894] [2022-03-03 20:19:38,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:19:38,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:38,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:38,344 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:38,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 20:19:38,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:19:38,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:38,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:19:38,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:38,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:38,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770503894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:38,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:38,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 14 [2022-03-03 20:19:38,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810740047] [2022-03-03 20:19:38,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:38,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:19:38,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:38,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:19:38,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:19:38,692 INFO L87 Difference]: Start difference. First operand 25809 states and 121080 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:39,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:39,448 INFO L93 Difference]: Finished difference Result 42598 states and 191600 transitions. [2022-03-03 20:19:39,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 20:19:39,448 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:19:39,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:39,636 INFO L225 Difference]: With dead ends: 42598 [2022-03-03 20:19:39,636 INFO L226 Difference]: Without dead ends: 42549 [2022-03-03 20:19:39,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:19:39,637 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 363 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:39,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 149 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:19:39,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42549 states. [2022-03-03 20:19:40,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42549 to 28164. [2022-03-03 20:19:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28164 states, 28163 states have (on average 4.6866455988353515) internal successors, (131990), 28163 states have internal predecessors, (131990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:40,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28164 states to 28164 states and 131990 transitions. [2022-03-03 20:19:40,606 INFO L78 Accepts]: Start accepts. Automaton has 28164 states and 131990 transitions. Word has length 25 [2022-03-03 20:19:40,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:40,606 INFO L470 AbstractCegarLoop]: Abstraction has 28164 states and 131990 transitions. [2022-03-03 20:19:40,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 28164 states and 131990 transitions. [2022-03-03 20:19:40,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:19:40,675 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:40,675 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:40,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:40,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:40,876 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:40,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:40,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1690592450, now seen corresponding path program 3 times [2022-03-03 20:19:40,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:40,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115721880] [2022-03-03 20:19:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:40,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:40,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:40,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115721880] [2022-03-03 20:19:40,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115721880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:40,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027309166] [2022-03-03 20:19:40,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:19:40,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:40,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:40,905 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:40,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 20:19:40,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 20:19:40,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:40,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:19:40,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:40,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 20:19:40,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027309166] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:19:40,976 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 20:19:40,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2022-03-03 20:19:40,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512311377] [2022-03-03 20:19:40,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:19:40,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 20:19:40,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:40,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 20:19:40,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:19:40,977 INFO L87 Difference]: Start difference. First operand 28164 states and 131990 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:41,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:41,500 INFO L93 Difference]: Finished difference Result 37387 states and 169578 transitions. [2022-03-03 20:19:41,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 20:19:41,500 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:19:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:41,635 INFO L225 Difference]: With dead ends: 37387 [2022-03-03 20:19:41,635 INFO L226 Difference]: Without dead ends: 37305 [2022-03-03 20:19:41,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:19:41,635 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 113 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:41,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 98 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:19:41,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37305 states. [2022-03-03 20:19:42,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37305 to 28147. [2022-03-03 20:19:42,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28147 states, 28146 states have (on average 4.679457116464151) internal successors, (131708), 28146 states have internal predecessors, (131708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:42,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28147 states to 28147 states and 131708 transitions. [2022-03-03 20:19:42,728 INFO L78 Accepts]: Start accepts. Automaton has 28147 states and 131708 transitions. Word has length 25 [2022-03-03 20:19:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:42,728 INFO L470 AbstractCegarLoop]: Abstraction has 28147 states and 131708 transitions. [2022-03-03 20:19:42,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand 28147 states and 131708 transitions. [2022-03-03 20:19:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:19:42,805 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:42,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:42,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:43,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:43,007 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:43,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:43,008 INFO L85 PathProgramCache]: Analyzing trace with hash -48618236, now seen corresponding path program 5 times [2022-03-03 20:19:43,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:43,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588093261] [2022-03-03 20:19:43,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:43,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:43,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:43,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588093261] [2022-03-03 20:19:43,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588093261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:43,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651582532] [2022-03-03 20:19:43,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:19:43,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:43,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:43,079 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:43,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 20:19:43,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:19:43,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:43,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 20:19:43,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:43,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:43,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651582532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:43,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:43,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-03 20:19:43,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357066111] [2022-03-03 20:19:43,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:43,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 20:19:43,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:43,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 20:19:43,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:19:43,265 INFO L87 Difference]: Start difference. First operand 28147 states and 131708 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:43,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:43,880 INFO L93 Difference]: Finished difference Result 30690 states and 141720 transitions. [2022-03-03 20:19:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:19:43,880 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:19:43,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:43,988 INFO L225 Difference]: With dead ends: 30690 [2022-03-03 20:19:43,988 INFO L226 Difference]: Without dead ends: 30593 [2022-03-03 20:19:43,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 12 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:19:43,989 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 93 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:43,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 268 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:19:44,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30593 states. [2022-03-03 20:19:44,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30593 to 28417. [2022-03-03 20:19:44,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28417 states, 28416 states have (on average 4.682819538288288) internal successors, (133067), 28416 states have internal predecessors, (133067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:44,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28417 states to 28417 states and 133067 transitions. [2022-03-03 20:19:44,836 INFO L78 Accepts]: Start accepts. Automaton has 28417 states and 133067 transitions. Word has length 25 [2022-03-03 20:19:44,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:44,836 INFO L470 AbstractCegarLoop]: Abstraction has 28417 states and 133067 transitions. [2022-03-03 20:19:44,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:44,836 INFO L276 IsEmpty]: Start isEmpty. Operand 28417 states and 133067 transitions. [2022-03-03 20:19:44,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:19:44,911 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:44,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:44,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:45,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:45,112 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:45,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:45,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1120396096, now seen corresponding path program 9 times [2022-03-03 20:19:45,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:45,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551385766] [2022-03-03 20:19:45,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:45,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:45,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:45,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551385766] [2022-03-03 20:19:45,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551385766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:45,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773636359] [2022-03-03 20:19:45,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:19:45,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:45,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:45,146 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:45,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 20:19:45,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 20:19:45,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:45,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:19:45,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:45,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:45,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773636359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:45,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:45,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2022-03-03 20:19:45,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880389084] [2022-03-03 20:19:45,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:45,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:19:45,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:45,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:19:45,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:19:45,379 INFO L87 Difference]: Start difference. First operand 28417 states and 133067 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:46,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:46,456 INFO L93 Difference]: Finished difference Result 69496 states and 320413 transitions. [2022-03-03 20:19:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 20:19:46,456 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:19:46,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:46,933 INFO L225 Difference]: With dead ends: 69496 [2022-03-03 20:19:46,933 INFO L226 Difference]: Without dead ends: 69496 [2022-03-03 20:19:46,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=336, Invalid=656, Unknown=0, NotChecked=0, Total=992 [2022-03-03 20:19:46,934 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 238 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:46,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 111 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:19:46,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69496 states. [2022-03-03 20:19:48,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69496 to 47698. [2022-03-03 20:19:48,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47698 states, 47697 states have (on average 4.730402331383525) internal successors, (225626), 47697 states have internal predecessors, (225626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47698 states to 47698 states and 225626 transitions. [2022-03-03 20:19:48,749 INFO L78 Accepts]: Start accepts. Automaton has 47698 states and 225626 transitions. Word has length 25 [2022-03-03 20:19:48,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:48,749 INFO L470 AbstractCegarLoop]: Abstraction has 47698 states and 225626 transitions. [2022-03-03 20:19:48,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 47698 states and 225626 transitions. [2022-03-03 20:19:48,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:19:48,868 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:48,868 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:48,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:49,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:49,069 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:49,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:49,069 INFO L85 PathProgramCache]: Analyzing trace with hash -362078012, now seen corresponding path program 6 times [2022-03-03 20:19:49,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:49,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746642157] [2022-03-03 20:19:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:49,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:49,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:49,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746642157] [2022-03-03 20:19:49,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746642157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:49,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777747125] [2022-03-03 20:19:49,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:19:49,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:49,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:49,147 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:49,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 20:19:49,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:19:49,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:49,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 20:19:49,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:49,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:49,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777747125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:49,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:49,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 20:19:49,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037462280] [2022-03-03 20:19:49,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:49,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:19:49,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:49,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:19:49,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:19:49,380 INFO L87 Difference]: Start difference. First operand 47698 states and 225626 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:50,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:50,217 INFO L93 Difference]: Finished difference Result 49499 states and 232603 transitions. [2022-03-03 20:19:50,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:19:50,217 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:19:50,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:50,428 INFO L225 Difference]: With dead ends: 49499 [2022-03-03 20:19:50,428 INFO L226 Difference]: Without dead ends: 49305 [2022-03-03 20:19:50,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:19:50,429 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 110 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:50,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 212 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:19:50,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49305 states. [2022-03-03 20:19:51,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49305 to 47824. [2022-03-03 20:19:51,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47824 states, 47823 states have (on average 4.73075716705351) internal successors, (226239), 47823 states have internal predecessors, (226239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47824 states to 47824 states and 226239 transitions. [2022-03-03 20:19:52,015 INFO L78 Accepts]: Start accepts. Automaton has 47824 states and 226239 transitions. Word has length 25 [2022-03-03 20:19:52,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:52,015 INFO L470 AbstractCegarLoop]: Abstraction has 47824 states and 226239 transitions. [2022-03-03 20:19:52,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:52,015 INFO L276 IsEmpty]: Start isEmpty. Operand 47824 states and 226239 transitions. [2022-03-03 20:19:52,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:19:52,136 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:52,136 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:52,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:52,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-03 20:19:52,337 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:52,338 INFO L85 PathProgramCache]: Analyzing trace with hash 994663360, now seen corresponding path program 7 times [2022-03-03 20:19:52,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:52,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333604939] [2022-03-03 20:19:52,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:52,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:19:52,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:52,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333604939] [2022-03-03 20:19:52,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333604939] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:52,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423035658] [2022-03-03 20:19:52,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:19:52,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:52,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:52,409 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:52,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 20:19:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:52,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 20:19:52,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:19:52,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:19:52,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423035658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:52,651 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:52,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 20:19:52,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290683179] [2022-03-03 20:19:52,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:52,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:19:52,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:52,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:19:52,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:19:52,652 INFO L87 Difference]: Start difference. First operand 47824 states and 226239 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:53,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:53,372 INFO L93 Difference]: Finished difference Result 49199 states and 231557 transitions. [2022-03-03 20:19:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 20:19:53,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:19:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:53,719 INFO L225 Difference]: With dead ends: 49199 [2022-03-03 20:19:53,720 INFO L226 Difference]: Without dead ends: 49026 [2022-03-03 20:19:53,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:19:53,720 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 80 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:53,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 207 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:19:53,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49026 states. [2022-03-03 20:19:54,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49026 to 47970. [2022-03-03 20:19:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47970 states, 47969 states have (on average 4.731534949654986) internal successors, (226967), 47969 states have internal predecessors, (226967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47970 states to 47970 states and 226967 transitions. [2022-03-03 20:19:55,057 INFO L78 Accepts]: Start accepts. Automaton has 47970 states and 226967 transitions. Word has length 25 [2022-03-03 20:19:55,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:55,057 INFO L470 AbstractCegarLoop]: Abstraction has 47970 states and 226967 transitions. [2022-03-03 20:19:55,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:55,057 INFO L276 IsEmpty]: Start isEmpty. Operand 47970 states and 226967 transitions. [2022-03-03 20:19:55,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:19:55,175 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:55,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:55,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-03 20:19:55,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:55,376 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:19:55,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:55,376 INFO L85 PathProgramCache]: Analyzing trace with hash -417418548, now seen corresponding path program 10 times [2022-03-03 20:19:55,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:55,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212452918] [2022-03-03 20:19:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:55,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:55,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:55,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212452918] [2022-03-03 20:19:55,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212452918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:55,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492749488] [2022-03-03 20:19:55,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:19:55,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:55,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:55,417 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:55,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 20:19:55,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:19:55,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:55,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:19:55,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:55,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:55,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492749488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:55,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:55,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2022-03-03 20:19:55,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407214830] [2022-03-03 20:19:55,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:55,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:19:55,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:55,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:19:55,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:19:55,622 INFO L87 Difference]: Start difference. First operand 47970 states and 226967 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:57,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:57,193 INFO L93 Difference]: Finished difference Result 108096 states and 492688 transitions. [2022-03-03 20:19:57,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 20:19:57,193 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:19:57,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:57,965 INFO L225 Difference]: With dead ends: 108096 [2022-03-03 20:19:57,965 INFO L226 Difference]: Without dead ends: 107887 [2022-03-03 20:19:57,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=677, Unknown=0, NotChecked=0, Total=992 [2022-03-03 20:19:57,966 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 290 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:57,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 234 Invalid, 798 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [114 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:19:58,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107887 states. [2022-03-03 20:20:00,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107887 to 93158. [2022-03-03 20:20:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93158 states, 93157 states have (on average 4.627596423242483) internal successors, (431093), 93157 states have internal predecessors, (431093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:01,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93158 states to 93158 states and 431093 transitions. [2022-03-03 20:20:01,425 INFO L78 Accepts]: Start accepts. Automaton has 93158 states and 431093 transitions. Word has length 25 [2022-03-03 20:20:01,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:01,425 INFO L470 AbstractCegarLoop]: Abstraction has 93158 states and 431093 transitions. [2022-03-03 20:20:01,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:01,426 INFO L276 IsEmpty]: Start isEmpty. Operand 93158 states and 431093 transitions. [2022-03-03 20:20:01,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:20:01,961 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:01,961 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:01,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-03 20:20:02,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:02,175 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:20:02,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:02,176 INFO L85 PathProgramCache]: Analyzing trace with hash -823215352, now seen corresponding path program 11 times [2022-03-03 20:20:02,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:02,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011591277] [2022-03-03 20:20:02,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:02,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:02,227 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:02,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011591277] [2022-03-03 20:20:02,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011591277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:02,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945131081] [2022-03-03 20:20:02,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:20:02,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:02,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:02,228 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:02,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 20:20:02,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:20:02,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:20:02,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 20:20:02,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:02,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:02,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945131081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:02,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:02,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-03-03 20:20:02,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893573756] [2022-03-03 20:20:02,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:02,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 20:20:02,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:02,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 20:20:02,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:20:02,666 INFO L87 Difference]: Start difference. First operand 93158 states and 431093 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:07,229 INFO L93 Difference]: Finished difference Result 262758 states and 1182106 transitions. [2022-03-03 20:20:07,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-03 20:20:07,229 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:20:07,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:09,015 INFO L225 Difference]: With dead ends: 262758 [2022-03-03 20:20:09,015 INFO L226 Difference]: Without dead ends: 262524 [2022-03-03 20:20:09,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1397, Invalid=3159, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 20:20:09,016 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 573 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:09,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 338 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:20:09,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262524 states. [2022-03-03 20:20:16,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262524 to 153519. [2022-03-03 20:20:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153519 states, 153518 states have (on average 4.58576193019711) internal successors, (703997), 153518 states have internal predecessors, (703997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153519 states to 153519 states and 703997 transitions. [2022-03-03 20:20:17,824 INFO L78 Accepts]: Start accepts. Automaton has 153519 states and 703997 transitions. Word has length 25 [2022-03-03 20:20:17,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:17,825 INFO L470 AbstractCegarLoop]: Abstraction has 153519 states and 703997 transitions. [2022-03-03 20:20:17,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 153519 states and 703997 transitions. [2022-03-03 20:20:18,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:20:18,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:18,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:18,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-03 20:20:18,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-03 20:20:18,391 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:20:18,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:18,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1589133496, now seen corresponding path program 12 times [2022-03-03 20:20:18,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:18,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825046827] [2022-03-03 20:20:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:18,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:18,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:18,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825046827] [2022-03-03 20:20:18,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825046827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:18,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622539539] [2022-03-03 20:20:18,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:20:18,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:18,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:18,444 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:18,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 20:20:18,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 20:20:18,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:20:18,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 20:20:18,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:18,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:19,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622539539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:19,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:19,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-03-03 20:20:19,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556917198] [2022-03-03 20:20:19,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:19,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 20:20:19,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:19,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 20:20:19,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:20:19,018 INFO L87 Difference]: Start difference. First operand 153519 states and 703997 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:23,831 INFO L93 Difference]: Finished difference Result 330266 states and 1479418 transitions. [2022-03-03 20:20:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 20:20:23,831 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:20:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:26,401 INFO L225 Difference]: With dead ends: 330266 [2022-03-03 20:20:26,401 INFO L226 Difference]: Without dead ends: 330266 [2022-03-03 20:20:26,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1342, Invalid=3214, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 20:20:26,403 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 747 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:26,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 314 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:20:26,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330266 states. [2022-03-03 20:20:35,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330266 to 199056. [2022-03-03 20:20:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199056 states, 199055 states have (on average 4.607776745120695) internal successors, (917201), 199055 states have internal predecessors, (917201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199056 states to 199056 states and 917201 transitions. [2022-03-03 20:20:38,021 INFO L78 Accepts]: Start accepts. Automaton has 199056 states and 917201 transitions. Word has length 25 [2022-03-03 20:20:38,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:38,022 INFO L470 AbstractCegarLoop]: Abstraction has 199056 states and 917201 transitions. [2022-03-03 20:20:38,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:38,022 INFO L276 IsEmpty]: Start isEmpty. Operand 199056 states and 917201 transitions. [2022-03-03 20:20:38,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:20:38,758 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:38,758 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:38,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-03 20:20:38,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-03 20:20:38,963 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:20:38,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:38,964 INFO L85 PathProgramCache]: Analyzing trace with hash -606187362, now seen corresponding path program 13 times [2022-03-03 20:20:38,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:38,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914187611] [2022-03-03 20:20:38,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:38,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:39,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:39,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914187611] [2022-03-03 20:20:39,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914187611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:39,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487770166] [2022-03-03 20:20:39,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:20:39,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:39,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:39,016 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:39,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 20:20:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:39,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 20:20:39,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:39,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:39,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:39,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487770166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:39,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:39,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-03-03 20:20:39,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942029356] [2022-03-03 20:20:39,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:39,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 20:20:39,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:39,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 20:20:39,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:20:39,361 INFO L87 Difference]: Start difference. First operand 199056 states and 917201 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:44,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:44,265 INFO L93 Difference]: Finished difference Result 272500 states and 1225177 transitions. [2022-03-03 20:20:44,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 20:20:44,279 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:20:44,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:47,064 INFO L225 Difference]: With dead ends: 272500 [2022-03-03 20:20:47,065 INFO L226 Difference]: Without dead ends: 272269 [2022-03-03 20:20:47,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=928, Invalid=2264, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 20:20:47,065 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 547 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:47,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 487 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:20:47,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272269 states. [2022-03-03 20:20:55,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272269 to 201570. [2022-03-03 20:20:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201570 states, 201569 states have (on average 4.602304917918926) internal successors, (927682), 201569 states have internal predecessors, (927682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:57,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201570 states to 201570 states and 927682 transitions. [2022-03-03 20:20:57,145 INFO L78 Accepts]: Start accepts. Automaton has 201570 states and 927682 transitions. Word has length 25 [2022-03-03 20:20:57,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:57,145 INFO L470 AbstractCegarLoop]: Abstraction has 201570 states and 927682 transitions. [2022-03-03 20:20:57,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:57,145 INFO L276 IsEmpty]: Start isEmpty. Operand 201570 states and 927682 transitions. [2022-03-03 20:20:57,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:20:57,622 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:57,622 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:57,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-03 20:20:57,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-03 20:20:57,823 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:20:57,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:57,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1468668168, now seen corresponding path program 14 times [2022-03-03 20:20:57,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:57,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380085876] [2022-03-03 20:20:57,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:57,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:57,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:57,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380085876] [2022-03-03 20:20:57,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380085876] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:57,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982043040] [2022-03-03 20:20:57,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:20:57,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:57,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:57,884 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:57,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 20:20:57,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:20:57,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:20:57,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 20:20:57,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:58,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:58,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982043040] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:58,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:58,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2022-03-03 20:20:58,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33118698] [2022-03-03 20:20:58,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:58,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:20:58,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:58,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:20:58,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:20:58,602 INFO L87 Difference]: Start difference. First operand 201570 states and 927682 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:02,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:21:02,609 INFO L93 Difference]: Finished difference Result 266946 states and 1207930 transitions. [2022-03-03 20:21:02,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 20:21:02,609 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:21:02,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:21:04,475 INFO L225 Difference]: With dead ends: 266946 [2022-03-03 20:21:04,475 INFO L226 Difference]: Without dead ends: 266520 [2022-03-03 20:21:04,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=606, Invalid=1286, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 20:21:04,476 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 362 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:21:04,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 293 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:21:05,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266520 states. [2022-03-03 20:21:11,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266520 to 207040. [2022-03-03 20:21:11,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207040 states, 207039 states have (on average 4.61873366853588) internal successors, (956258), 207039 states have internal predecessors, (956258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:13,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207040 states to 207040 states and 956258 transitions. [2022-03-03 20:21:13,732 INFO L78 Accepts]: Start accepts. Automaton has 207040 states and 956258 transitions. Word has length 25 [2022-03-03 20:21:13,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:21:13,733 INFO L470 AbstractCegarLoop]: Abstraction has 207040 states and 956258 transitions. [2022-03-03 20:21:13,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:13,733 INFO L276 IsEmpty]: Start isEmpty. Operand 207040 states and 956258 transitions. [2022-03-03 20:21:14,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:21:14,605 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:21:14,605 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:21:14,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-03 20:21:14,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-03 20:21:14,819 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 20:21:14,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:21:14,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1088513630, now seen corresponding path program 15 times [2022-03-03 20:21:14,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:21:14,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261832662] [2022-03-03 20:21:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:21:14,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:21:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:21:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:14,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:21:14,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261832662] [2022-03-03 20:21:14,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261832662] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:21:14,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386368100] [2022-03-03 20:21:14,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:21:14,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:14,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:21:14,924 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:21:14,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 20:21:14,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 20:21:14,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:21:14,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 20:21:14,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:21:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:15,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:21:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:15,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386368100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:21:15,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:21:15,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2022-03-03 20:21:15,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457977506] [2022-03-03 20:21:15,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:21:15,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:21:15,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:21:15,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:21:15,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:21:15,782 INFO L87 Difference]: Start difference. First operand 207040 states and 956258 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)