/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-44898dd [2022-02-15 14:48:46,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 14:48:46,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 14:48:46,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 14:48:46,573 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-02-15 14:48:46,597 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 14:48:46,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 14:48:46,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-15 14:48:46,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-15 14:48:46,599 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-15 14:48:46,599 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-15 14:48:46,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-15 14:48:46,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-15 14:48:46,599 INFO L138 SettingsManager]: * Use SBE=true [2022-02-15 14:48:46,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 14:48:46,600 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 14:48:46,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 14:48:46,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 14:48:46,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 14:48:46,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 14:48:46,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 14:48:46,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 14:48:46,601 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 14:48:46,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 14:48:46,601 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 14:48:46,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 14:48:46,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 14:48:46,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 14:48:46,601 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 14:48:46,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 14:48:46,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 14:48:46,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 14:48:46,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-15 14:48:46,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-15 14:48:46,602 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-15 14:48:46,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-15 14:48:46,602 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-15 14:48:46,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 14:48:46,602 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-15 14:48:46,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 14:48:46,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 14:48:46,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 14:48:46,836 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-15 14:48:46,837 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-15 14:48:46,838 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl [2022-02-15 14:48:46,838 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl' [2022-02-15 14:48:46,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 14:48:46,866 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 14:48:46,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-15 14:48:46,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-15 14:48:46,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-15 14:48:46,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:46" (1/1) ... [2022-02-15 14:48:46,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:46" (1/1) ... [2022-02-15 14:48:46,889 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-15 14:48:46,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-15 14:48:46,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 14:48:46,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 14:48:46,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 14:48:46,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:46" (1/1) ... [2022-02-15 14:48:46,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:46" (1/1) ... [2022-02-15 14:48:46,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:46" (1/1) ... [2022-02-15 14:48:46,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:46" (1/1) ... [2022-02-15 14:48:46,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:46" (1/1) ... [2022-02-15 14:48:46,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:46" (1/1) ... [2022-02-15 14:48:46,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:46" (1/1) ... [2022-02-15 14:48:46,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 14:48:46,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 14:48:46,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 14:48:46,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 14:48:46,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:46" (1/1) ... [2022-02-15 14:48:46,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 14:48:46,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:46,940 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 14:48:46,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 14:48:46,992 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-15 14:48:46,992 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-15 14:48:46,992 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-15 14:48:46,992 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-15 14:48:46,992 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-15 14:48:46,992 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-15 14:48:46,993 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-15 14:48:46,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 14:48:46,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 14:48:46,993 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-15 14:48:46,993 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-15 14:48:46,993 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-15 14:48:46,993 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-02-15 14:48:46,993 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-02-15 14:48:46,993 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-02-15 14:48:46,996 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-15 14:48:47,034 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 14:48:47,036 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 14:48:47,160 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 14:48:47,174 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 14:48:47,175 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-15 14:48:47,179 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:48:47 BoogieIcfgContainer [2022-02-15 14:48:47,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 14:48:47,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 14:48:47,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 14:48:47,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 14:48:47,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:46" (1/2) ... [2022-02-15 14:48:47,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d6d47f and model type hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:48:47, skipping insertion in model container [2022-02-15 14:48:47,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:48:47" (2/2) ... [2022-02-15 14:48:47,185 INFO L111 eAbstractionObserver]: Analyzing ICFG hard1.wvr.bpl [2022-02-15 14:48:47,200 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-15 14:48:47,201 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-15 14:48:47,201 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 14:48:47,201 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-15 14:48:47,274 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-02-15 14:48:47,337 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 14:48:47,342 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 [2022-02-15 14:48:47,342 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-02-15 14:48:47,349 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2022-02-15 14:48:47,486 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) [2022-02-15 14:48:47,494 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) [2022-02-15 14:48:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 14:48:47,511 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:47,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:47,512 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:47,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:47,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1576666978, now seen corresponding path program 1 times [2022-02-15 14:48:47,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:47,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849108309] [2022-02-15 14:48:47,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:47,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:47,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:47,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849108309] [2022-02-15 14:48:47,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849108309] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:48:47,630 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:48:47,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-15 14:48:47,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428793387] [2022-02-15 14:48:47,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:48:47,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 14:48:47,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:47,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 14:48:47,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 14:48:47,660 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) [2022-02-15 14:48:47,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:47,739 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2022-02-15 14:48:47,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 14:48:47,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-15 14:48:47,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:47,763 INFO L225 Difference]: With dead ends: 854 [2022-02-15 14:48:47,763 INFO L226 Difference]: Without dead ends: 823 [2022-02-15 14:48:47,764 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 [2022-02-15 14:48:47,767 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 [2022-02-15 14:48:47,768 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] [2022-02-15 14:48:47,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-02-15 14:48:47,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2022-02-15 14:48:47,872 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) [2022-02-15 14:48:47,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2022-02-15 14:48:47,876 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2022-02-15 14:48:47,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:47,877 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2022-02-15 14:48:47,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:47,878 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2022-02-15 14:48:47,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:48:47,881 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:47,882 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] [2022-02-15 14:48:47,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 14:48:47,882 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:47,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:47,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1245579906, now seen corresponding path program 1 times [2022-02-15 14:48:47,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:47,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96375112] [2022-02-15 14:48:47,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:47,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:47,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:47,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96375112] [2022-02-15 14:48:47,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96375112] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:47,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128989241] [2022-02-15 14:48:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:47,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:47,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:47,942 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:47,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-15 14:48:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:47,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-15 14:48:47,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:48,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:48,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128989241] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:48,165 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-15 14:48:48,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 7 [2022-02-15 14:48:48,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966696984] [2022-02-15 14:48:48,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:48:48,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 14:48:48,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:48,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 14:48:48,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-15 14:48:48,167 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) [2022-02-15 14:48:48,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:48,251 INFO L93 Difference]: Finished difference Result 1262 states and 4751 transitions. [2022-02-15 14:48:48,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 14:48:48,252 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 [2022-02-15 14:48:48,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:48,259 INFO L225 Difference]: With dead ends: 1262 [2022-02-15 14:48:48,259 INFO L226 Difference]: Without dead ends: 1262 [2022-02-15 14:48:48,259 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 [2022-02-15 14:48:48,262 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 [2022-02-15 14:48:48,263 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] [2022-02-15 14:48:48,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2022-02-15 14:48:48,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 692. [2022-02-15 14:48:48,294 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) [2022-02-15 14:48:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2738 transitions. [2022-02-15 14:48:48,297 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2738 transitions. Word has length 21 [2022-02-15 14:48:48,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:48,298 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 2738 transitions. [2022-02-15 14:48:48,298 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) [2022-02-15 14:48:48,299 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2738 transitions. [2022-02-15 14:48:48,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:48:48,301 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:48,302 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] [2022-02-15 14:48:48,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:48,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:48,503 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:48,505 INFO L85 PathProgramCache]: Analyzing trace with hash 117815332, now seen corresponding path program 1 times [2022-02-15 14:48:48,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:48,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412580973] [2022-02-15 14:48:48,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:48,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:48,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:48,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412580973] [2022-02-15 14:48:48,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412580973] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:48,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183473787] [2022-02-15 14:48:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:48,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:48,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:48,558 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:48,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-15 14:48:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:48,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-15 14:48:48,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:48,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:48,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183473787] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:48,744 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-15 14:48:48,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2022-02-15 14:48:48,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322317171] [2022-02-15 14:48:48,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:48:48,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 14:48:48,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:48,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 14:48:48,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-02-15 14:48:48,745 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) [2022-02-15 14:48:48,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:48,802 INFO L93 Difference]: Finished difference Result 1343 states and 5074 transitions. [2022-02-15 14:48:48,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 14:48:48,803 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 [2022-02-15 14:48:48,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:48,810 INFO L225 Difference]: With dead ends: 1343 [2022-02-15 14:48:48,810 INFO L226 Difference]: Without dead ends: 1343 [2022-02-15 14:48:48,810 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 [2022-02-15 14:48:48,811 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 [2022-02-15 14:48:48,812 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] [2022-02-15 14:48:48,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2022-02-15 14:48:48,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 797. [2022-02-15 14:48:48,838 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) [2022-02-15 14:48:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 3189 transitions. [2022-02-15 14:48:48,841 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 3189 transitions. Word has length 21 [2022-02-15 14:48:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:48,842 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 3189 transitions. [2022-02-15 14:48:48,842 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) [2022-02-15 14:48:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 3189 transitions. [2022-02-15 14:48:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:48:48,844 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:48,844 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] [2022-02-15 14:48:48,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:49,058 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 [2022-02-15 14:48:49,059 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:49,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:49,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1519093540, now seen corresponding path program 1 times [2022-02-15 14:48:49,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:49,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833378828] [2022-02-15 14:48:49,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:49,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:49,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:49,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833378828] [2022-02-15 14:48:49,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833378828] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:48:49,097 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:48:49,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 14:48:49,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985598659] [2022-02-15 14:48:49,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:48:49,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 14:48:49,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:49,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 14:48:49,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:48:49,098 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) [2022-02-15 14:48:49,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:49,192 INFO L93 Difference]: Finished difference Result 1019 states and 3647 transitions. [2022-02-15 14:48:49,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 14:48:49,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 14:48:49,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:49,197 INFO L225 Difference]: With dead ends: 1019 [2022-02-15 14:48:49,197 INFO L226 Difference]: Without dead ends: 906 [2022-02-15 14:48:49,197 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 [2022-02-15 14:48:49,199 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-15 14:48:49,200 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] [2022-02-15 14:48:49,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2022-02-15 14:48:49,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 775. [2022-02-15 14:48:49,218 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) [2022-02-15 14:48:49,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2894 transitions. [2022-02-15 14:48:49,221 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2894 transitions. Word has length 21 [2022-02-15 14:48:49,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:49,222 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2894 transitions. [2022-02-15 14:48:49,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:49,222 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2894 transitions. [2022-02-15 14:48:49,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:48:49,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:49,226 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] [2022-02-15 14:48:49,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 14:48:49,226 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:49,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:49,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1969827620, now seen corresponding path program 2 times [2022-02-15 14:48:49,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:49,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088782684] [2022-02-15 14:48:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:49,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:49,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:49,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088782684] [2022-02-15 14:48:49,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088782684] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:48:49,280 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:48:49,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 14:48:49,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798741437] [2022-02-15 14:48:49,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:48:49,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 14:48:49,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:49,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 14:48:49,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:48:49,283 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) [2022-02-15 14:48:49,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:49,327 INFO L93 Difference]: Finished difference Result 930 states and 3513 transitions. [2022-02-15 14:48:49,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 14:48:49,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 14:48:49,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:49,339 INFO L225 Difference]: With dead ends: 930 [2022-02-15 14:48:49,339 INFO L226 Difference]: Without dead ends: 930 [2022-02-15 14:48:49,340 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 [2022-02-15 14:48:49,342 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 [2022-02-15 14:48:49,342 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] [2022-02-15 14:48:49,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-02-15 14:48:49,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 658. [2022-02-15 14:48:49,358 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) [2022-02-15 14:48:49,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2507 transitions. [2022-02-15 14:48:49,360 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2507 transitions. Word has length 21 [2022-02-15 14:48:49,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:49,361 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2507 transitions. [2022-02-15 14:48:49,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:49,361 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2507 transitions. [2022-02-15 14:48:49,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 14:48:49,362 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:49,363 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] [2022-02-15 14:48:49,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 14:48:49,363 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:49,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:49,364 INFO L85 PathProgramCache]: Analyzing trace with hash -229280956, now seen corresponding path program 1 times [2022-02-15 14:48:49,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:49,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512818955] [2022-02-15 14:48:49,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:49,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:49,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:49,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512818955] [2022-02-15 14:48:49,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512818955] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:49,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209225275] [2022-02-15 14:48:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:49,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:49,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:49,428 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:49,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-15 14:48:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:49,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 14:48:49,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:49,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:49,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209225275] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:49,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:49,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2022-02-15 14:48:49,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170513863] [2022-02-15 14:48:49,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:49,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 14:48:49,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:49,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 14:48:49,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-02-15 14:48:49,637 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) [2022-02-15 14:48:49,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:49,801 INFO L93 Difference]: Finished difference Result 1938 states and 7091 transitions. [2022-02-15 14:48:49,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 14:48:49,801 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 [2022-02-15 14:48:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:49,813 INFO L225 Difference]: With dead ends: 1938 [2022-02-15 14:48:49,814 INFO L226 Difference]: Without dead ends: 1938 [2022-02-15 14:48:49,814 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 [2022-02-15 14:48:49,814 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 [2022-02-15 14:48:49,815 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] [2022-02-15 14:48:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2022-02-15 14:48:49,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 916. [2022-02-15 14:48:49,842 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) [2022-02-15 14:48:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3477 transitions. [2022-02-15 14:48:49,846 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3477 transitions. Word has length 23 [2022-02-15 14:48:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:49,846 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 3477 transitions. [2022-02-15 14:48:49,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:49,846 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3477 transitions. [2022-02-15 14:48:49,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 14:48:49,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:49,848 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] [2022-02-15 14:48:49,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:50,060 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 [2022-02-15 14:48:50,060 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:50,060 INFO L85 PathProgramCache]: Analyzing trace with hash 869839812, now seen corresponding path program 1 times [2022-02-15 14:48:50,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:50,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069046770] [2022-02-15 14:48:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:50,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:50,118 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:50,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069046770] [2022-02-15 14:48:50,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069046770] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:50,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131968953] [2022-02-15 14:48:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:50,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:50,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:50,121 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:50,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-15 14:48:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:50,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 14:48:50,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:50,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:50,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131968953] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:50,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:50,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-15 14:48:50,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176245868] [2022-02-15 14:48:50,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:50,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 14:48:50,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:50,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 14:48:50,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 14:48:50,311 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) [2022-02-15 14:48:50,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:50,569 INFO L93 Difference]: Finished difference Result 2103 states and 7751 transitions. [2022-02-15 14:48:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 14:48:50,569 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 [2022-02-15 14:48:50,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:50,581 INFO L225 Difference]: With dead ends: 2103 [2022-02-15 14:48:50,581 INFO L226 Difference]: Without dead ends: 1818 [2022-02-15 14:48:50,582 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 [2022-02-15 14:48:50,583 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:50,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 191 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:48:50,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2022-02-15 14:48:50,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1131. [2022-02-15 14:48:50,616 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) [2022-02-15 14:48:50,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 4342 transitions. [2022-02-15 14:48:50,623 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 4342 transitions. Word has length 23 [2022-02-15 14:48:50,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:50,625 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 4342 transitions. [2022-02-15 14:48:50,626 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) [2022-02-15 14:48:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 4342 transitions. [2022-02-15 14:48:50,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 14:48:50,631 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:50,631 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] [2022-02-15 14:48:50,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:50,847 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 [2022-02-15 14:48:50,847 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:50,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:50,848 INFO L85 PathProgramCache]: Analyzing trace with hash -640056498, now seen corresponding path program 2 times [2022-02-15 14:48:50,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:50,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150451966] [2022-02-15 14:48:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:50,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:50,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:50,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150451966] [2022-02-15 14:48:50,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150451966] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:50,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216843718] [2022-02-15 14:48:50,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:48:50,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:50,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:50,923 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:50,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-15 14:48:50,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:48:50,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:50,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 14:48:50,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:51,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:51,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216843718] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:51,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:51,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-02-15 14:48:51,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895041992] [2022-02-15 14:48:51,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:51,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 14:48:51,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:51,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 14:48:51,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-15 14:48:51,135 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) [2022-02-15 14:48:51,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:51,390 INFO L93 Difference]: Finished difference Result 1972 states and 7446 transitions. [2022-02-15 14:48:51,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 14:48:51,390 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 [2022-02-15 14:48:51,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:51,399 INFO L225 Difference]: With dead ends: 1972 [2022-02-15 14:48:51,399 INFO L226 Difference]: Without dead ends: 1887 [2022-02-15 14:48:51,400 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 [2022-02-15 14:48:51,400 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:51,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 87 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:48:51,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2022-02-15 14:48:51,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1293. [2022-02-15 14:48:51,428 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) [2022-02-15 14:48:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 5009 transitions. [2022-02-15 14:48:51,432 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 5009 transitions. Word has length 23 [2022-02-15 14:48:51,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:51,432 INFO L470 AbstractCegarLoop]: Abstraction has 1293 states and 5009 transitions. [2022-02-15 14:48:51,432 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) [2022-02-15 14:48:51,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 5009 transitions. [2022-02-15 14:48:51,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 14:48:51,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:51,435 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] [2022-02-15 14:48:51,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:51,657 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 [2022-02-15 14:48:51,657 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:51,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:51,658 INFO L85 PathProgramCache]: Analyzing trace with hash -151839806, now seen corresponding path program 3 times [2022-02-15 14:48:51,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:51,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701635022] [2022-02-15 14:48:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:51,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:48:51,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:51,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701635022] [2022-02-15 14:48:51,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701635022] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:51,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342105214] [2022-02-15 14:48:51,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:48:51,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:51,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:51,715 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:51,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-15 14:48:51,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:48:51,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:51,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 14:48:51,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:48:51,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:48:51,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342105214] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:51,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:51,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-02-15 14:48:51,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136285527] [2022-02-15 14:48:51,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:51,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 14:48:51,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:51,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 14:48:51,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-15 14:48:51,913 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) [2022-02-15 14:48:52,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:52,099 INFO L93 Difference]: Finished difference Result 2093 states and 7918 transitions. [2022-02-15 14:48:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 14:48:52,100 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 [2022-02-15 14:48:52,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:52,122 INFO L225 Difference]: With dead ends: 2093 [2022-02-15 14:48:52,122 INFO L226 Difference]: Without dead ends: 2038 [2022-02-15 14:48:52,123 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 [2022-02-15 14:48:52,124 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 [2022-02-15 14:48:52,124 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] [2022-02-15 14:48:52,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2022-02-15 14:48:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1558. [2022-02-15 14:48:52,159 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) [2022-02-15 14:48:52,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 6069 transitions. [2022-02-15 14:48:52,163 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 6069 transitions. Word has length 23 [2022-02-15 14:48:52,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:52,164 INFO L470 AbstractCegarLoop]: Abstraction has 1558 states and 6069 transitions. [2022-02-15 14:48:52,164 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) [2022-02-15 14:48:52,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 6069 transitions. [2022-02-15 14:48:52,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 14:48:52,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:52,169 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] [2022-02-15 14:48:52,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:52,388 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 [2022-02-15 14:48:52,388 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:52,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:52,388 INFO L85 PathProgramCache]: Analyzing trace with hash -277999770, now seen corresponding path program 1 times [2022-02-15 14:48:52,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:52,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977678366] [2022-02-15 14:48:52,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:52,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:52,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:52,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977678366] [2022-02-15 14:48:52,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977678366] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:52,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437227728] [2022-02-15 14:48:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:52,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:52,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:52,450 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:52,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-15 14:48:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:52,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 14:48:52,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:52,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:52,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437227728] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:52,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:52,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-15 14:48:52,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424577508] [2022-02-15 14:48:52,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:52,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 14:48:52,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:52,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 14:48:52,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 14:48:52,606 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) [2022-02-15 14:48:52,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:52,768 INFO L93 Difference]: Finished difference Result 3079 states and 11859 transitions. [2022-02-15 14:48:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 14:48:52,769 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 [2022-02-15 14:48:52,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:52,777 INFO L225 Difference]: With dead ends: 3079 [2022-02-15 14:48:52,777 INFO L226 Difference]: Without dead ends: 3024 [2022-02-15 14:48:52,777 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 [2022-02-15 14:48:52,778 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 [2022-02-15 14:48:52,778 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] [2022-02-15 14:48:52,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2022-02-15 14:48:52,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 1833. [2022-02-15 14:48:52,817 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) [2022-02-15 14:48:52,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 7321 transitions. [2022-02-15 14:48:52,822 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 7321 transitions. Word has length 23 [2022-02-15 14:48:52,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:52,822 INFO L470 AbstractCegarLoop]: Abstraction has 1833 states and 7321 transitions. [2022-02-15 14:48:52,823 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) [2022-02-15 14:48:52,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 7321 transitions. [2022-02-15 14:48:52,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 14:48:52,827 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:52,827 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] [2022-02-15 14:48:52,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-15 14:48:53,042 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 [2022-02-15 14:48:53,043 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:53,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:53,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1737160546, now seen corresponding path program 2 times [2022-02-15 14:48:53,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:53,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72211683] [2022-02-15 14:48:53,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:53,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:48:53,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:53,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72211683] [2022-02-15 14:48:53,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72211683] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:53,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014312004] [2022-02-15 14:48:53,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:48:53,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:53,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:53,082 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:53,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-15 14:48:53,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:48:53,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:53,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 14:48:53,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:48:53,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:48:53,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014312004] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:53,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:53,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-02-15 14:48:53,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940058165] [2022-02-15 14:48:53,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:53,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 14:48:53,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:53,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 14:48:53,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-15 14:48:53,259 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) [2022-02-15 14:48:53,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:53,417 INFO L93 Difference]: Finished difference Result 2822 states and 11041 transitions. [2022-02-15 14:48:53,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 14:48:53,418 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 [2022-02-15 14:48:53,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:53,425 INFO L225 Difference]: With dead ends: 2822 [2022-02-15 14:48:53,425 INFO L226 Difference]: Without dead ends: 2704 [2022-02-15 14:48:53,425 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 [2022-02-15 14:48:53,426 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 [2022-02-15 14:48:53,426 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] [2022-02-15 14:48:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2022-02-15 14:48:53,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2151. [2022-02-15 14:48:53,465 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) [2022-02-15 14:48:53,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 8709 transitions. [2022-02-15 14:48:53,472 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 8709 transitions. Word has length 23 [2022-02-15 14:48:53,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:53,472 INFO L470 AbstractCegarLoop]: Abstraction has 2151 states and 8709 transitions. [2022-02-15 14:48:53,472 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) [2022-02-15 14:48:53,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 8709 transitions. [2022-02-15 14:48:53,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 14:48:53,477 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:53,477 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] [2022-02-15 14:48:53,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:53,692 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 [2022-02-15 14:48:53,693 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:53,693 INFO L85 PathProgramCache]: Analyzing trace with hash 786210190, now seen corresponding path program 3 times [2022-02-15 14:48:53,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:53,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721623378] [2022-02-15 14:48:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:53,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:48:53,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:53,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721623378] [2022-02-15 14:48:53,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721623378] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:53,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433334067] [2022-02-15 14:48:53,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:48:53,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:53,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:53,737 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:53,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:48:53,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:53,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 14:48:53,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:53,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-15 14:48:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:48:53,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:48:53,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433334067] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:53,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:53,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-02-15 14:48:53,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506232181] [2022-02-15 14:48:53,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:53,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 14:48:53,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:53,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 14:48:53,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-15 14:48:53,950 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) [2022-02-15 14:48:54,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:54,114 INFO L93 Difference]: Finished difference Result 3397 states and 13566 transitions. [2022-02-15 14:48:54,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 14:48:54,114 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 [2022-02-15 14:48:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:54,125 INFO L225 Difference]: With dead ends: 3397 [2022-02-15 14:48:54,125 INFO L226 Difference]: Without dead ends: 3342 [2022-02-15 14:48:54,125 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 [2022-02-15 14:48:54,126 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 [2022-02-15 14:48:54,126 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] [2022-02-15 14:48:54,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2022-02-15 14:48:54,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 2343. [2022-02-15 14:48:54,196 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) [2022-02-15 14:48:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 9655 transitions. [2022-02-15 14:48:54,205 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 9655 transitions. Word has length 23 [2022-02-15 14:48:54,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:54,205 INFO L470 AbstractCegarLoop]: Abstraction has 2343 states and 9655 transitions. [2022-02-15 14:48:54,206 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) [2022-02-15 14:48:54,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 9655 transitions. [2022-02-15 14:48:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 14:48:54,212 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:54,212 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] [2022-02-15 14:48:54,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:54,425 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 [2022-02-15 14:48:54,425 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:54,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:54,425 INFO L85 PathProgramCache]: Analyzing trace with hash 33636326, now seen corresponding path program 1 times [2022-02-15 14:48:54,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:54,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525710930] [2022-02-15 14:48:54,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:54,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:54,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:54,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525710930] [2022-02-15 14:48:54,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525710930] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:48:54,444 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:48:54,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 14:48:54,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897788742] [2022-02-15 14:48:54,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:48:54,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 14:48:54,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:54,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 14:48:54,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:48:54,445 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) [2022-02-15 14:48:54,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:54,500 INFO L93 Difference]: Finished difference Result 2180 states and 8842 transitions. [2022-02-15 14:48:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 14:48:54,500 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 [2022-02-15 14:48:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:54,506 INFO L225 Difference]: With dead ends: 2180 [2022-02-15 14:48:54,506 INFO L226 Difference]: Without dead ends: 2137 [2022-02-15 14:48:54,506 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 [2022-02-15 14:48:54,506 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 [2022-02-15 14:48:54,506 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] [2022-02-15 14:48:54,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2022-02-15 14:48:54,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1749. [2022-02-15 14:48:54,533 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) [2022-02-15 14:48:54,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 7098 transitions. [2022-02-15 14:48:54,538 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 7098 transitions. Word has length 23 [2022-02-15 14:48:54,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:54,538 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 7098 transitions. [2022-02-15 14:48:54,538 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) [2022-02-15 14:48:54,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 7098 transitions. [2022-02-15 14:48:54,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 14:48:54,542 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:54,542 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] [2022-02-15 14:48:54,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 14:48:54,542 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:54,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:54,542 INFO L85 PathProgramCache]: Analyzing trace with hash -25922294, now seen corresponding path program 2 times [2022-02-15 14:48:54,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:54,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191150504] [2022-02-15 14:48:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:54,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:54,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:54,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191150504] [2022-02-15 14:48:54,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191150504] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:54,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284618952] [2022-02-15 14:48:54,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:48:54,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:54,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:54,563 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:54,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-15 14:48:54,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:48:54,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:54,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 14:48:54,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:54,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:54,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284618952] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:54,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:54,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-02-15 14:48:54,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326798165] [2022-02-15 14:48:54,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:54,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 14:48:54,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:54,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 14:48:54,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-15 14:48:54,718 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) [2022-02-15 14:48:54,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:54,944 INFO L93 Difference]: Finished difference Result 4870 states and 18610 transitions. [2022-02-15 14:48:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 14:48:54,945 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 [2022-02-15 14:48:54,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:54,994 INFO L225 Difference]: With dead ends: 4870 [2022-02-15 14:48:54,994 INFO L226 Difference]: Without dead ends: 4870 [2022-02-15 14:48:54,994 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 [2022-02-15 14:48:54,995 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:54,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 101 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:48:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4870 states. [2022-02-15 14:48:55,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4870 to 2341. [2022-02-15 14:48:55,047 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) [2022-02-15 14:48:55,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 9852 transitions. [2022-02-15 14:48:55,054 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 9852 transitions. Word has length 23 [2022-02-15 14:48:55,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:55,054 INFO L470 AbstractCegarLoop]: Abstraction has 2341 states and 9852 transitions. [2022-02-15 14:48:55,054 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) [2022-02-15 14:48:55,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 9852 transitions. [2022-02-15 14:48:55,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 14:48:55,060 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:55,060 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] [2022-02-15 14:48:55,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:55,267 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 [2022-02-15 14:48:55,267 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:55,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:55,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1475647550, now seen corresponding path program 3 times [2022-02-15 14:48:55,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:55,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311890158] [2022-02-15 14:48:55,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:55,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:55,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:55,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311890158] [2022-02-15 14:48:55,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311890158] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:55,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075120483] [2022-02-15 14:48:55,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:48:55,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:55,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:55,286 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:55,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-15 14:48:55,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:48:55,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:55,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 14:48:55,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:55,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:55,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075120483] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:55,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:55,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-02-15 14:48:55,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201147800] [2022-02-15 14:48:55,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:55,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 14:48:55,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:55,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 14:48:55,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-02-15 14:48:55,464 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) [2022-02-15 14:48:55,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:55,716 INFO L93 Difference]: Finished difference Result 4654 states and 18685 transitions. [2022-02-15 14:48:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 14:48:55,717 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 [2022-02-15 14:48:55,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:55,730 INFO L225 Difference]: With dead ends: 4654 [2022-02-15 14:48:55,730 INFO L226 Difference]: Without dead ends: 4654 [2022-02-15 14:48:55,731 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 [2022-02-15 14:48:55,731 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 [2022-02-15 14:48:55,731 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] [2022-02-15 14:48:55,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2022-02-15 14:48:55,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 2562. [2022-02-15 14:48:55,786 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) [2022-02-15 14:48:55,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 11038 transitions. [2022-02-15 14:48:55,796 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 11038 transitions. Word has length 23 [2022-02-15 14:48:55,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:55,796 INFO L470 AbstractCegarLoop]: Abstraction has 2562 states and 11038 transitions. [2022-02-15 14:48:55,797 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) [2022-02-15 14:48:55,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 11038 transitions. [2022-02-15 14:48:55,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 14:48:55,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:55,803 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] [2022-02-15 14:48:55,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:56,019 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 [2022-02-15 14:48:56,019 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:56,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:56,020 INFO L85 PathProgramCache]: Analyzing trace with hash 970212618, now seen corresponding path program 2 times [2022-02-15 14:48:56,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:56,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583452212] [2022-02-15 14:48:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:56,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:56,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:56,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583452212] [2022-02-15 14:48:56,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583452212] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:56,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586946638] [2022-02-15 14:48:56,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:48:56,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:56,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:56,051 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:56,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-15 14:48:56,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:48:56,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:56,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 14:48:56,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:56,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:56,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586946638] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:56,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:56,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2022-02-15 14:48:56,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548484886] [2022-02-15 14:48:56,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:56,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 14:48:56,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:56,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 14:48:56,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-02-15 14:48:56,204 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) [2022-02-15 14:48:56,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:56,380 INFO L93 Difference]: Finished difference Result 4928 states and 20191 transitions. [2022-02-15 14:48:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 14:48:56,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-15 14:48:56,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:56,393 INFO L225 Difference]: With dead ends: 4928 [2022-02-15 14:48:56,393 INFO L226 Difference]: Without dead ends: 4928 [2022-02-15 14:48:56,394 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 [2022-02-15 14:48:56,394 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 [2022-02-15 14:48:56,394 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] [2022-02-15 14:48:56,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2022-02-15 14:48:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 2970. [2022-02-15 14:48:56,449 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) [2022-02-15 14:48:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 12730 transitions. [2022-02-15 14:48:56,457 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 12730 transitions. Word has length 23 [2022-02-15 14:48:56,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:56,457 INFO L470 AbstractCegarLoop]: Abstraction has 2970 states and 12730 transitions. [2022-02-15 14:48:56,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:56,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 12730 transitions. [2022-02-15 14:48:56,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 14:48:56,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:56,463 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] [2022-02-15 14:48:56,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:56,679 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 [2022-02-15 14:48:56,679 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:56,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:56,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1118399754, now seen corresponding path program 3 times [2022-02-15 14:48:56,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:56,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922472979] [2022-02-15 14:48:56,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:56,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:56,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:56,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922472979] [2022-02-15 14:48:56,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922472979] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:56,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907347687] [2022-02-15 14:48:56,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:48:56,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:56,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:56,702 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:56,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:48:56,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:56,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 14:48:56,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:56,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-15 14:48:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:56,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:56,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907347687] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:56,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:56,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-02-15 14:48:56,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506558326] [2022-02-15 14:48:56,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:56,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 14:48:56,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:56,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 14:48:56,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-15 14:48:56,892 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) [2022-02-15 14:48:57,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:57,181 INFO L93 Difference]: Finished difference Result 7558 states and 30662 transitions. [2022-02-15 14:48:57,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 14:48:57,182 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 [2022-02-15 14:48:57,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:57,201 INFO L225 Difference]: With dead ends: 7558 [2022-02-15 14:48:57,201 INFO L226 Difference]: Without dead ends: 7558 [2022-02-15 14:48:57,201 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 [2022-02-15 14:48:57,202 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 [2022-02-15 14:48:57,202 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] [2022-02-15 14:48:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7558 states. [2022-02-15 14:48:57,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7558 to 4354. [2022-02-15 14:48:57,318 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) [2022-02-15 14:48:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 19166 transitions. [2022-02-15 14:48:57,331 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 19166 transitions. Word has length 23 [2022-02-15 14:48:57,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:57,331 INFO L470 AbstractCegarLoop]: Abstraction has 4354 states and 19166 transitions. [2022-02-15 14:48:57,331 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) [2022-02-15 14:48:57,331 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 19166 transitions. [2022-02-15 14:48:57,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 14:48:57,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:57,341 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] [2022-02-15 14:48:57,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:57,555 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 [2022-02-15 14:48:57,555 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:57,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:57,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1188293318, now seen corresponding path program 4 times [2022-02-15 14:48:57,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:57,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263791810] [2022-02-15 14:48:57,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:57,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:57,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:57,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:57,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263791810] [2022-02-15 14:48:57,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263791810] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:57,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108106307] [2022-02-15 14:48:57,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:48:57,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:57,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:57,574 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:57,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-15 14:48:57,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:48:57,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:57,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 14:48:57,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:57,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:57,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108106307] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:57,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:57,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-02-15 14:48:57,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567392622] [2022-02-15 14:48:57,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:57,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 14:48:57,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:57,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 14:48:57,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-02-15 14:48:57,737 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) [2022-02-15 14:48:58,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:58,034 INFO L93 Difference]: Finished difference Result 7822 states and 32925 transitions. [2022-02-15 14:48:58,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 14:48:58,039 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 [2022-02-15 14:48:58,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:58,058 INFO L225 Difference]: With dead ends: 7822 [2022-02-15 14:48:58,058 INFO L226 Difference]: Without dead ends: 7822 [2022-02-15 14:48:58,058 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 [2022-02-15 14:48:58,059 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 184 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-15 14:48:58,059 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] [2022-02-15 14:48:58,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7822 states. [2022-02-15 14:48:58,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7822 to 4648. [2022-02-15 14:48:58,196 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) [2022-02-15 14:48:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 20747 transitions. [2022-02-15 14:48:58,213 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 20747 transitions. Word has length 23 [2022-02-15 14:48:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:58,213 INFO L470 AbstractCegarLoop]: Abstraction has 4648 states and 20747 transitions. [2022-02-15 14:48:58,213 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) [2022-02-15 14:48:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 20747 transitions. [2022-02-15 14:48:58,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:48:58,224 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:58,224 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] [2022-02-15 14:48:58,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:58,439 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 [2022-02-15 14:48:58,439 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:58,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:58,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1541563518, now seen corresponding path program 4 times [2022-02-15 14:48:58,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:58,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322311972] [2022-02-15 14:48:58,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:58,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:58,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:58,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322311972] [2022-02-15 14:48:58,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322311972] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:58,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580704664] [2022-02-15 14:48:58,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:48:58,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:58,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:58,476 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:58,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-15 14:48:58,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:48:58,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:58,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:48:58,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:58,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:58,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580704664] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:58,726 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-15 14:48:58,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-02-15 14:48:58,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728342647] [2022-02-15 14:48:58,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:48:58,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 14:48:58,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:58,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 14:48:58,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-02-15 14:48:58,728 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) [2022-02-15 14:48:58,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:58,887 INFO L93 Difference]: Finished difference Result 7073 states and 30775 transitions. [2022-02-15 14:48:58,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 14:48:58,887 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 25 [2022-02-15 14:48:58,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:58,905 INFO L225 Difference]: With dead ends: 7073 [2022-02-15 14:48:58,906 INFO L226 Difference]: Without dead ends: 7073 [2022-02-15 14:48:58,906 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 [2022-02-15 14:48:58,906 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 [2022-02-15 14:48:58,906 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] [2022-02-15 14:48:58,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7073 states. [2022-02-15 14:48:58,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7073 to 4730. [2022-02-15 14:48:58,997 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) [2022-02-15 14:48:59,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 21080 transitions. [2022-02-15 14:48:59,012 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 21080 transitions. Word has length 25 [2022-02-15 14:48:59,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:59,012 INFO L470 AbstractCegarLoop]: Abstraction has 4730 states and 21080 transitions. [2022-02-15 14:48:59,012 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) [2022-02-15 14:48:59,012 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 21080 transitions. [2022-02-15 14:48:59,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:48:59,022 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:59,022 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] [2022-02-15 14:48:59,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:59,235 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 [2022-02-15 14:48:59,236 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:48:59,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:59,236 INFO L85 PathProgramCache]: Analyzing trace with hash -231361658, now seen corresponding path program 4 times [2022-02-15 14:48:59,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:59,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526907583] [2022-02-15 14:48:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:59,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:59,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:59,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526907583] [2022-02-15 14:48:59,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526907583] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:59,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868543919] [2022-02-15 14:48:59,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:48:59,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:59,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:59,290 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:59,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-15 14:48:59,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:48:59,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:59,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 14:48:59,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:59,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:59,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868543919] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:59,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:59,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-02-15 14:48:59,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826888490] [2022-02-15 14:48:59,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:59,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 14:48:59,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:59,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 14:48:59,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-15 14:48:59,517 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) [2022-02-15 14:48:59,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:59,833 INFO L93 Difference]: Finished difference Result 6959 states and 29620 transitions. [2022-02-15 14:48:59,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 14:48:59,834 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 [2022-02-15 14:48:59,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:59,853 INFO L225 Difference]: With dead ends: 6959 [2022-02-15 14:48:59,853 INFO L226 Difference]: Without dead ends: 6862 [2022-02-15 14:48:59,853 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 [2022-02-15 14:48:59,854 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 [2022-02-15 14:48:59,854 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] [2022-02-15 14:48:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6862 states. [2022-02-15 14:48:59,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6862 to 5203. [2022-02-15 14:48:59,957 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) [2022-02-15 14:48:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5203 states to 5203 states and 23140 transitions. [2022-02-15 14:48:59,974 INFO L78 Accepts]: Start accepts. Automaton has 5203 states and 23140 transitions. Word has length 25 [2022-02-15 14:48:59,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:59,974 INFO L470 AbstractCegarLoop]: Abstraction has 5203 states and 23140 transitions. [2022-02-15 14:48:59,974 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) [2022-02-15 14:48:59,974 INFO L276 IsEmpty]: Start isEmpty. Operand 5203 states and 23140 transitions. [2022-02-15 14:48:59,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:48:59,986 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:59,986 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] [2022-02-15 14:49:00,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:00,202 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 [2022-02-15 14:49:00,202 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:49:00,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:00,203 INFO L85 PathProgramCache]: Analyzing trace with hash 867759110, now seen corresponding path program 1 times [2022-02-15 14:49:00,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:00,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754958850] [2022-02-15 14:49:00,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:00,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:00,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:00,229 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:00,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754958850] [2022-02-15 14:49:00,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754958850] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:00,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63269242] [2022-02-15 14:49:00,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:00,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:00,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:00,230 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:00,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-15 14:49:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:00,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:49:00,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:00,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:00,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63269242] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:00,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:00,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2022-02-15 14:49:00,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65272959] [2022-02-15 14:49:00,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:00,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 14:49:00,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:00,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 14:49:00,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-02-15 14:49:00,451 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) [2022-02-15 14:49:01,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:01,171 INFO L93 Difference]: Finished difference Result 16617 states and 68830 transitions. [2022-02-15 14:49:01,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:49:01,172 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 [2022-02-15 14:49:01,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:01,219 INFO L225 Difference]: With dead ends: 16617 [2022-02-15 14:49:01,219 INFO L226 Difference]: Without dead ends: 16551 [2022-02-15 14:49:01,220 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 [2022-02-15 14:49:01,221 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 [2022-02-15 14:49:01,221 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] [2022-02-15 14:49:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16551 states. [2022-02-15 14:49:01,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16551 to 7204. [2022-02-15 14:49:01,487 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) [2022-02-15 14:49:01,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7204 states to 7204 states and 32615 transitions. [2022-02-15 14:49:01,511 INFO L78 Accepts]: Start accepts. Automaton has 7204 states and 32615 transitions. Word has length 25 [2022-02-15 14:49:01,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:01,511 INFO L470 AbstractCegarLoop]: Abstraction has 7204 states and 32615 transitions. [2022-02-15 14:49:01,511 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) [2022-02-15 14:49:01,511 INFO L276 IsEmpty]: Start isEmpty. Operand 7204 states and 32615 transitions. [2022-02-15 14:49:01,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:49:01,528 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:01,528 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] [2022-02-15 14:49:01,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-02-15 14:49:01,743 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 [2022-02-15 14:49:01,743 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:49:01,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:01,744 INFO L85 PathProgramCache]: Analyzing trace with hash 937652674, now seen corresponding path program 2 times [2022-02-15 14:49:01,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:01,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561688322] [2022-02-15 14:49:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:01,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:01,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:01,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561688322] [2022-02-15 14:49:01,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561688322] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:01,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489317261] [2022-02-15 14:49:01,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:49:01,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:01,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:01,788 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:01,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-15 14:49:01,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:49:01,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:01,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:49:01,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:01,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:02,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489317261] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:02,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:02,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2022-02-15 14:49:02,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206901107] [2022-02-15 14:49:02,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:02,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 14:49:02,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:02,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 14:49:02,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-02-15 14:49:02,041 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) [2022-02-15 14:49:02,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:02,802 INFO L93 Difference]: Finished difference Result 15330 states and 66058 transitions. [2022-02-15 14:49:02,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 14:49:02,802 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 [2022-02-15 14:49:02,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:02,946 INFO L225 Difference]: With dead ends: 15330 [2022-02-15 14:49:02,946 INFO L226 Difference]: Without dead ends: 15330 [2022-02-15 14:49:02,947 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 [2022-02-15 14:49:02,948 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 [2022-02-15 14:49:02,948 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] [2022-02-15 14:49:02,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15330 states. [2022-02-15 14:49:03,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15330 to 9308. [2022-02-15 14:49:03,256 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) [2022-02-15 14:49:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9308 states to 9308 states and 42501 transitions. [2022-02-15 14:49:03,290 INFO L78 Accepts]: Start accepts. Automaton has 9308 states and 42501 transitions. Word has length 25 [2022-02-15 14:49:03,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:03,291 INFO L470 AbstractCegarLoop]: Abstraction has 9308 states and 42501 transitions. [2022-02-15 14:49:03,291 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) [2022-02-15 14:49:03,291 INFO L276 IsEmpty]: Start isEmpty. Operand 9308 states and 42501 transitions. [2022-02-15 14:49:03,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:49:03,312 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:03,313 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] [2022-02-15 14:49:03,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-02-15 14:49:03,513 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 [2022-02-15 14:49:03,513 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:49:03,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:03,514 INFO L85 PathProgramCache]: Analyzing trace with hash 599012682, now seen corresponding path program 3 times [2022-02-15 14:49:03,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:03,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522879107] [2022-02-15 14:49:03,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:03,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:03,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:03,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522879107] [2022-02-15 14:49:03,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522879107] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:03,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819650056] [2022-02-15 14:49:03,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:49:03,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:03,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:03,556 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:03,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-15 14:49:03,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:49:03,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:03,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 14:49:03,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:03,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:03,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819650056] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:03,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:03,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-02-15 14:49:03,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391057239] [2022-02-15 14:49:03,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:03,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 14:49:03,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:03,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 14:49:03,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:49:03,963 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) [2022-02-15 14:49:05,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:05,516 INFO L93 Difference]: Finished difference Result 43349 states and 187926 transitions. [2022-02-15 14:49:05,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 14:49:05,516 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 [2022-02-15 14:49:05,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:05,728 INFO L225 Difference]: With dead ends: 43349 [2022-02-15 14:49:05,728 INFO L226 Difference]: Without dead ends: 43226 [2022-02-15 14:49:05,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1109, Invalid=2673, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 14:49:05,729 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 890 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-02-15 14:49:05,730 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] [2022-02-15 14:49:05,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43226 states. [2022-02-15 14:49:06,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43226 to 18163. [2022-02-15 14:49:06,490 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) [2022-02-15 14:49:06,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18163 states to 18163 states and 84680 transitions. [2022-02-15 14:49:06,554 INFO L78 Accepts]: Start accepts. Automaton has 18163 states and 84680 transitions. Word has length 25 [2022-02-15 14:49:06,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:06,554 INFO L470 AbstractCegarLoop]: Abstraction has 18163 states and 84680 transitions. [2022-02-15 14:49:06,554 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) [2022-02-15 14:49:06,554 INFO L276 IsEmpty]: Start isEmpty. Operand 18163 states and 84680 transitions. [2022-02-15 14:49:06,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:49:06,593 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:06,594 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] [2022-02-15 14:49:06,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-02-15 14:49:06,794 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 [2022-02-15 14:49:06,794 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:49:06,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:06,795 INFO L85 PathProgramCache]: Analyzing trace with hash 816040672, now seen corresponding path program 4 times [2022-02-15 14:49:06,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:06,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769671239] [2022-02-15 14:49:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:06,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:06,848 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:06,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769671239] [2022-02-15 14:49:06,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769671239] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:06,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531868327] [2022-02-15 14:49:06,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:49:06,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:06,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:06,849 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:06,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-15 14:49:06,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:49:06,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:06,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 14:49:06,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:06,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:07,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531868327] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:07,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:07,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-02-15 14:49:07,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131614413] [2022-02-15 14:49:07,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:07,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 14:49:07,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:07,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 14:49:07,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:49:07,173 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) [2022-02-15 14:49:08,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:08,954 INFO L93 Difference]: Finished difference Result 42110 states and 182030 transitions. [2022-02-15 14:49:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 14:49:08,955 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 [2022-02-15 14:49:08,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:09,185 INFO L225 Difference]: With dead ends: 42110 [2022-02-15 14:49:09,185 INFO L226 Difference]: Without dead ends: 41954 [2022-02-15 14:49:09,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1036, Invalid=2746, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 14:49:09,186 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 701 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:09,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 273 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:49:09,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41954 states. [2022-02-15 14:49:09,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41954 to 19283. [2022-02-15 14:49:09,849 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) [2022-02-15 14:49:10,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19283 states to 19283 states and 89227 transitions. [2022-02-15 14:49:10,055 INFO L78 Accepts]: Start accepts. Automaton has 19283 states and 89227 transitions. Word has length 25 [2022-02-15 14:49:10,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:10,055 INFO L470 AbstractCegarLoop]: Abstraction has 19283 states and 89227 transitions. [2022-02-15 14:49:10,055 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) [2022-02-15 14:49:10,055 INFO L276 IsEmpty]: Start isEmpty. Operand 19283 states and 89227 transitions. [2022-02-15 14:49:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:49:10,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:10,108 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] [2022-02-15 14:49:10,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:10,308 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 [2022-02-15 14:49:10,308 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:49:10,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:10,309 INFO L85 PathProgramCache]: Analyzing trace with hash -249609790, now seen corresponding path program 5 times [2022-02-15 14:49:10,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:10,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073166486] [2022-02-15 14:49:10,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:10,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:10,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:10,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073166486] [2022-02-15 14:49:10,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073166486] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:10,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430751962] [2022-02-15 14:49:10,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:49:10,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:10,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:10,478 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:10,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-15 14:49:10,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:49:10,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:10,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 14:49:10,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:10,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:11,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430751962] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:11,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:11,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-15 14:49:11,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545957533] [2022-02-15 14:49:11,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:11,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 14:49:11,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:11,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 14:49:11,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-02-15 14:49:11,036 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) [2022-02-15 14:49:12,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:12,721 INFO L93 Difference]: Finished difference Result 40327 states and 177681 transitions. [2022-02-15 14:49:12,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 14:49:12,721 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 [2022-02-15 14:49:12,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:12,857 INFO L225 Difference]: With dead ends: 40327 [2022-02-15 14:49:12,857 INFO L226 Difference]: Without dead ends: 40123 [2022-02-15 14:49:12,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=498, Invalid=1224, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 14:49:12,858 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 392 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:12,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 225 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:49:12,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40123 states. [2022-02-15 14:49:13,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40123 to 20179. [2022-02-15 14:49:13,614 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) [2022-02-15 14:49:13,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20179 states to 20179 states and 94052 transitions. [2022-02-15 14:49:13,692 INFO L78 Accepts]: Start accepts. Automaton has 20179 states and 94052 transitions. Word has length 25 [2022-02-15 14:49:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:13,692 INFO L470 AbstractCegarLoop]: Abstraction has 20179 states and 94052 transitions. [2022-02-15 14:49:13,693 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) [2022-02-15 14:49:13,693 INFO L276 IsEmpty]: Start isEmpty. Operand 20179 states and 94052 transitions. [2022-02-15 14:49:13,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:49:13,741 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:13,741 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] [2022-02-15 14:49:13,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:13,953 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 [2022-02-15 14:49:13,954 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:49:13,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:13,954 INFO L85 PathProgramCache]: Analyzing trace with hash -629764328, now seen corresponding path program 6 times [2022-02-15 14:49:13,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:13,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941481432] [2022-02-15 14:49:13,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:13,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:14,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:14,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941481432] [2022-02-15 14:49:14,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941481432] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:14,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97686733] [2022-02-15 14:49:14,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:49:14,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:14,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:14,027 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:14,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-15 14:49:14,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:49:14,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:14,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 14:49:14,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:14,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:14,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97686733] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:14,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:14,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-15 14:49:14,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698652653] [2022-02-15 14:49:14,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:14,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 14:49:14,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:14,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 14:49:14,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-02-15 14:49:14,725 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) [2022-02-15 14:49:16,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:16,814 INFO L93 Difference]: Finished difference Result 39840 states and 175243 transitions. [2022-02-15 14:49:16,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 14:49:16,815 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 [2022-02-15 14:49:16,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:16,976 INFO L225 Difference]: With dead ends: 39840 [2022-02-15 14:49:16,976 INFO L226 Difference]: Without dead ends: 38961 [2022-02-15 14:49:16,977 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 [2022-02-15 14:49:16,977 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 423 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:16,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 301 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:49:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38961 states. [2022-02-15 14:49:17,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38961 to 20002. [2022-02-15 14:49:17,619 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) [2022-02-15 14:49:17,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20002 states to 20002 states and 92893 transitions. [2022-02-15 14:49:17,788 INFO L78 Accepts]: Start accepts. Automaton has 20002 states and 92893 transitions. Word has length 25 [2022-02-15 14:49:17,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:17,789 INFO L470 AbstractCegarLoop]: Abstraction has 20002 states and 92893 transitions. [2022-02-15 14:49:17,789 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) [2022-02-15 14:49:17,789 INFO L276 IsEmpty]: Start isEmpty. Operand 20002 states and 92893 transitions. [2022-02-15 14:49:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:49:17,836 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:17,836 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] [2022-02-15 14:49:17,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:18,037 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 [2022-02-15 14:49:18,038 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:49:18,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:18,038 INFO L85 PathProgramCache]: Analyzing trace with hash 50816006, now seen corresponding path program 7 times [2022-02-15 14:49:18,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:18,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587027594] [2022-02-15 14:49:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:18,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:18,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:18,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587027594] [2022-02-15 14:49:18,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587027594] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:18,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385914104] [2022-02-15 14:49:18,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:49:18,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:18,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:18,089 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:18,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-15 14:49:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:18,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 14:49:18,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:18,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:18,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385914104] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:18,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:18,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-02-15 14:49:18,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352577406] [2022-02-15 14:49:18,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:18,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 14:49:18,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:18,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 14:49:18,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:49:18,411 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) [2022-02-15 14:49:19,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:19,681 INFO L93 Difference]: Finished difference Result 52489 states and 232133 transitions. [2022-02-15 14:49:19,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:49:19,681 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 [2022-02-15 14:49:19,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:20,053 INFO L225 Difference]: With dead ends: 52489 [2022-02-15 14:49:20,053 INFO L226 Difference]: Without dead ends: 52306 [2022-02-15 14:49:20,054 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 [2022-02-15 14:49:20,054 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 663 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-02-15 14:49:20,054 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] [2022-02-15 14:49:20,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52306 states. [2022-02-15 14:49:21,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52306 to 25506. [2022-02-15 14:49:21,067 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) [2022-02-15 14:49:21,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25506 states to 25506 states and 119717 transitions. [2022-02-15 14:49:21,327 INFO L78 Accepts]: Start accepts. Automaton has 25506 states and 119717 transitions. Word has length 25 [2022-02-15 14:49:21,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:21,328 INFO L470 AbstractCegarLoop]: Abstraction has 25506 states and 119717 transitions. [2022-02-15 14:49:21,328 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) [2022-02-15 14:49:21,328 INFO L276 IsEmpty]: Start isEmpty. Operand 25506 states and 119717 transitions. [2022-02-15 14:49:21,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:49:21,400 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:21,400 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] [2022-02-15 14:49:21,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:21,615 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 [2022-02-15 14:49:21,615 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:49:21,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:21,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2095354754, now seen corresponding path program 8 times [2022-02-15 14:49:21,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:21,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704559904] [2022-02-15 14:49:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:21,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:21,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:21,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704559904] [2022-02-15 14:49:21,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704559904] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:21,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401370425] [2022-02-15 14:49:21,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:49:21,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:21,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:21,702 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:21,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-15 14:49:21,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:49:21,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:21,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 14:49:21,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:21,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:22,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401370425] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:22,345 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:22,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-15 14:49:22,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260992609] [2022-02-15 14:49:22,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:22,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 14:49:22,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:22,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 14:49:22,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-02-15 14:49:22,346 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) [2022-02-15 14:49:24,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:24,211 INFO L93 Difference]: Finished difference Result 47186 states and 211684 transitions. [2022-02-15 14:49:24,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 14:49:24,211 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 [2022-02-15 14:49:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:24,390 INFO L225 Difference]: With dead ends: 47186 [2022-02-15 14:49:24,390 INFO L226 Difference]: Without dead ends: 46797 [2022-02-15 14:49:24,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:49:24,391 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 [2022-02-15 14:49:24,391 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] [2022-02-15 14:49:24,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46797 states. [2022-02-15 14:49:25,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46797 to 25503. [2022-02-15 14:49:25,216 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) [2022-02-15 14:49:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25503 states to 25503 states and 119680 transitions. [2022-02-15 14:49:25,311 INFO L78 Accepts]: Start accepts. Automaton has 25503 states and 119680 transitions. Word has length 25 [2022-02-15 14:49:25,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:25,311 INFO L470 AbstractCegarLoop]: Abstraction has 25503 states and 119680 transitions. [2022-02-15 14:49:25,311 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) [2022-02-15 14:49:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 25503 states and 119680 transitions. [2022-02-15 14:49:25,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:49:25,367 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:25,367 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] [2022-02-15 14:49:25,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-02-15 14:49:25,571 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 [2022-02-15 14:49:25,571 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:49:25,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:25,572 INFO L85 PathProgramCache]: Analyzing trace with hash 863019782, now seen corresponding path program 1 times [2022-02-15 14:49:25,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:25,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631322274] [2022-02-15 14:49:25,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:25,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:25,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:25,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631322274] [2022-02-15 14:49:25,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631322274] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:25,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966265693] [2022-02-15 14:49:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:25,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:25,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:25,600 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:25,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-15 14:49:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:25,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:49:25,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:25,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:25,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966265693] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:25,822 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-15 14:49:25,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 6] total 14 [2022-02-15 14:49:25,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160346502] [2022-02-15 14:49:25,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:49:25,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 14:49:25,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:25,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 14:49:25,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-02-15 14:49:25,823 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) [2022-02-15 14:49:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:26,279 INFO L93 Difference]: Finished difference Result 30985 states and 143944 transitions. [2022-02-15 14:49:26,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 14:49:26,280 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 [2022-02-15 14:49:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:26,396 INFO L225 Difference]: With dead ends: 30985 [2022-02-15 14:49:26,397 INFO L226 Difference]: Without dead ends: 30967 [2022-02-15 14:49:26,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2022-02-15 14:49:26,397 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 [2022-02-15 14:49:26,398 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] [2022-02-15 14:49:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30967 states. [2022-02-15 14:49:27,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30967 to 25809. [2022-02-15 14:49:27,098 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) [2022-02-15 14:49:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25809 states to 25809 states and 121080 transitions. [2022-02-15 14:49:27,199 INFO L78 Accepts]: Start accepts. Automaton has 25809 states and 121080 transitions. Word has length 25 [2022-02-15 14:49:27,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:27,199 INFO L470 AbstractCegarLoop]: Abstraction has 25809 states and 121080 transitions. [2022-02-15 14:49:27,199 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) [2022-02-15 14:49:27,199 INFO L276 IsEmpty]: Start isEmpty. Operand 25809 states and 121080 transitions. [2022-02-15 14:49:27,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:49:27,258 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:27,258 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] [2022-02-15 14:49:27,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-02-15 14:49:27,459 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 [2022-02-15 14:49:27,459 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:49:27,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:27,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1313753862, now seen corresponding path program 2 times [2022-02-15 14:49:27,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:27,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565586760] [2022-02-15 14:49:27,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:27,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:27,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:27,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565586760] [2022-02-15 14:49:27,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565586760] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:27,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642947900] [2022-02-15 14:49:27,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:49:27,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:27,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:27,488 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:27,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-15 14:49:27,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:49:27,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:27,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:49:27,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:27,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:27,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642947900] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:27,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:27,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 14 [2022-02-15 14:49:27,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890098444] [2022-02-15 14:49:27,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:27,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 14:49:27,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:27,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 14:49:27,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-02-15 14:49:27,709 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) [2022-02-15 14:49:28,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:28,458 INFO L93 Difference]: Finished difference Result 42598 states and 191600 transitions. [2022-02-15 14:49:28,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 14:49:28,459 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 [2022-02-15 14:49:28,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:28,630 INFO L225 Difference]: With dead ends: 42598 [2022-02-15 14:49:28,630 INFO L226 Difference]: Without dead ends: 42549 [2022-02-15 14:49:28,630 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 [2022-02-15 14:49:28,631 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:28,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 149 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:49:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42549 states. [2022-02-15 14:49:29,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42549 to 28164. [2022-02-15 14:49:29,669 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) [2022-02-15 14:49:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28164 states to 28164 states and 131990 transitions. [2022-02-15 14:49:29,777 INFO L78 Accepts]: Start accepts. Automaton has 28164 states and 131990 transitions. Word has length 25 [2022-02-15 14:49:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:29,777 INFO L470 AbstractCegarLoop]: Abstraction has 28164 states and 131990 transitions. [2022-02-15 14:49:29,777 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) [2022-02-15 14:49:29,777 INFO L276 IsEmpty]: Start isEmpty. Operand 28164 states and 131990 transitions. [2022-02-15 14:49:29,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:49:29,841 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:29,841 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] [2022-02-15 14:49:29,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-02-15 14:49:30,041 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 [2022-02-15 14:49:30,041 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:49:30,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:30,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1690592450, now seen corresponding path program 3 times [2022-02-15 14:49:30,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:30,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123397974] [2022-02-15 14:49:30,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:30,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:30,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:30,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123397974] [2022-02-15 14:49:30,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123397974] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:30,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340785301] [2022-02-15 14:49:30,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:49:30,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:30,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:30,075 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:30,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-15 14:49:30,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:49:30,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:30,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:49:30,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:30,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-15 14:49:30,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340785301] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:49:30,156 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-15 14:49:30,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2022-02-15 14:49:30,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837215267] [2022-02-15 14:49:30,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:49:30,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 14:49:30,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:30,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 14:49:30,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-02-15 14:49:30,157 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) [2022-02-15 14:49:30,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:30,704 INFO L93 Difference]: Finished difference Result 37387 states and 169578 transitions. [2022-02-15 14:49:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 14:49:30,704 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 [2022-02-15 14:49:30,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:30,841 INFO L225 Difference]: With dead ends: 37387 [2022-02-15 14:49:30,841 INFO L226 Difference]: Without dead ends: 37305 [2022-02-15 14:49:30,842 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 [2022-02-15 14:49:30,842 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 [2022-02-15 14:49:30,842 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] [2022-02-15 14:49:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37305 states. [2022-02-15 14:49:31,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37305 to 28147. [2022-02-15 14:49:31,697 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) [2022-02-15 14:49:31,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28147 states to 28147 states and 131708 transitions. [2022-02-15 14:49:31,835 INFO L78 Accepts]: Start accepts. Automaton has 28147 states and 131708 transitions. Word has length 25 [2022-02-15 14:49:31,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:31,835 INFO L470 AbstractCegarLoop]: Abstraction has 28147 states and 131708 transitions. [2022-02-15 14:49:31,835 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) [2022-02-15 14:49:31,835 INFO L276 IsEmpty]: Start isEmpty. Operand 28147 states and 131708 transitions. [2022-02-15 14:49:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:49:31,914 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:31,914 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] [2022-02-15 14:49:31,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-15 14:49:32,127 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 [2022-02-15 14:49:32,127 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:49:32,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:32,128 INFO L85 PathProgramCache]: Analyzing trace with hash -48618236, now seen corresponding path program 5 times [2022-02-15 14:49:32,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:32,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464057701] [2022-02-15 14:49:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:32,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:32,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:32,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464057701] [2022-02-15 14:49:32,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464057701] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:32,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966171300] [2022-02-15 14:49:32,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:49:32,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:32,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:32,184 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:32,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-15 14:49:32,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:49:32,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:32,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 14:49:32,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:32,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:32,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966171300] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:32,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:32,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-02-15 14:49:32,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629991821] [2022-02-15 14:49:32,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:32,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 14:49:32,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:32,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 14:49:32,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-15 14:49:32,558 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) [2022-02-15 14:49:33,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:33,013 INFO L93 Difference]: Finished difference Result 30690 states and 141720 transitions. [2022-02-15 14:49:33,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 14:49:33,013 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 [2022-02-15 14:49:33,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:33,114 INFO L225 Difference]: With dead ends: 30690 [2022-02-15 14:49:33,114 INFO L226 Difference]: Without dead ends: 30593 [2022-02-15 14:49:33,114 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 [2022-02-15 14:49:33,115 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 [2022-02-15 14:49:33,115 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] [2022-02-15 14:49:33,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30593 states. [2022-02-15 14:49:33,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30593 to 28417. [2022-02-15 14:49:33,808 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) [2022-02-15 14:49:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28417 states to 28417 states and 133067 transitions. [2022-02-15 14:49:33,915 INFO L78 Accepts]: Start accepts. Automaton has 28417 states and 133067 transitions. Word has length 25 [2022-02-15 14:49:33,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:33,915 INFO L470 AbstractCegarLoop]: Abstraction has 28417 states and 133067 transitions. [2022-02-15 14:49:33,916 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) [2022-02-15 14:49:33,916 INFO L276 IsEmpty]: Start isEmpty. Operand 28417 states and 133067 transitions. [2022-02-15 14:49:33,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:49:33,979 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:33,979 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] [2022-02-15 14:49:33,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:34,179 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 [2022-02-15 14:49:34,180 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:49:34,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:34,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1120396096, now seen corresponding path program 9 times [2022-02-15 14:49:34,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:34,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92999622] [2022-02-15 14:49:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:34,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:34,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:34,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92999622] [2022-02-15 14:49:34,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92999622] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:34,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252881982] [2022-02-15 14:49:34,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:49:34,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:34,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:34,207 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:34,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-15 14:49:34,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:49:34,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:34,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:49:34,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:34,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:34,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252881982] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:34,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:34,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2022-02-15 14:49:34,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649196423] [2022-02-15 14:49:34,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:34,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 14:49:34,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:34,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 14:49:34,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-02-15 14:49:34,428 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) [2022-02-15 14:49:35,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:35,683 INFO L93 Difference]: Finished difference Result 69496 states and 320413 transitions. [2022-02-15 14:49:35,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 14:49:35,684 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 [2022-02-15 14:49:35,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:36,017 INFO L225 Difference]: With dead ends: 69496 [2022-02-15 14:49:36,017 INFO L226 Difference]: Without dead ends: 69496 [2022-02-15 14:49:36,017 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 [2022-02-15 14:49:36,018 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 238 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:36,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 111 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 14:49:36,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69496 states. [2022-02-15 14:49:37,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69496 to 47698. [2022-02-15 14:49:37,458 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) [2022-02-15 14:49:37,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47698 states to 47698 states and 225626 transitions. [2022-02-15 14:49:37,655 INFO L78 Accepts]: Start accepts. Automaton has 47698 states and 225626 transitions. Word has length 25 [2022-02-15 14:49:37,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:37,655 INFO L470 AbstractCegarLoop]: Abstraction has 47698 states and 225626 transitions. [2022-02-15 14:49:37,656 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) [2022-02-15 14:49:37,656 INFO L276 IsEmpty]: Start isEmpty. Operand 47698 states and 225626 transitions. [2022-02-15 14:49:37,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:49:37,970 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:37,970 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] [2022-02-15 14:49:37,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-02-15 14:49:38,185 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 [2022-02-15 14:49:38,185 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:49:38,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:38,186 INFO L85 PathProgramCache]: Analyzing trace with hash -362078012, now seen corresponding path program 6 times [2022-02-15 14:49:38,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:38,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962550021] [2022-02-15 14:49:38,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:38,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:38,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:38,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962550021] [2022-02-15 14:49:38,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962550021] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:38,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395697571] [2022-02-15 14:49:38,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:49:38,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:38,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:38,259 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:38,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-15 14:49:38,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:49:38,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:38,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 14:49:38,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:38,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:38,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395697571] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:38,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:38,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-15 14:49:38,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291614835] [2022-02-15 14:49:38,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:38,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 14:49:38,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:38,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 14:49:38,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-15 14:49:38,516 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) [2022-02-15 14:49:39,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:39,366 INFO L93 Difference]: Finished difference Result 49499 states and 232603 transitions. [2022-02-15 14:49:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 14:49:39,367 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 [2022-02-15 14:49:39,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:39,594 INFO L225 Difference]: With dead ends: 49499 [2022-02-15 14:49:39,594 INFO L226 Difference]: Without dead ends: 49305 [2022-02-15 14:49:39,594 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 [2022-02-15 14:49:39,595 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 [2022-02-15 14:49:39,595 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] [2022-02-15 14:49:39,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49305 states. [2022-02-15 14:49:40,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49305 to 47824. [2022-02-15 14:49:40,661 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) [2022-02-15 14:49:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47824 states to 47824 states and 226239 transitions. [2022-02-15 14:49:41,064 INFO L78 Accepts]: Start accepts. Automaton has 47824 states and 226239 transitions. Word has length 25 [2022-02-15 14:49:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:41,064 INFO L470 AbstractCegarLoop]: Abstraction has 47824 states and 226239 transitions. [2022-02-15 14:49:41,064 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) [2022-02-15 14:49:41,064 INFO L276 IsEmpty]: Start isEmpty. Operand 47824 states and 226239 transitions. [2022-02-15 14:49:41,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:49:41,210 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:41,210 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] [2022-02-15 14:49:41,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:41,411 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 [2022-02-15 14:49:41,411 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:49:41,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:41,411 INFO L85 PathProgramCache]: Analyzing trace with hash 994663360, now seen corresponding path program 7 times [2022-02-15 14:49:41,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:41,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13328872] [2022-02-15 14:49:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:41,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:49:41,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:41,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13328872] [2022-02-15 14:49:41,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13328872] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:41,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267608937] [2022-02-15 14:49:41,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:49:41,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:41,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:41,491 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:41,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-15 14:49:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:41,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 14:49:41,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:49:41,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:49:41,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267608937] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:41,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:41,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-15 14:49:41,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898537831] [2022-02-15 14:49:41,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:41,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 14:49:41,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:41,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 14:49:41,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-15 14:49:41,753 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) [2022-02-15 14:49:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:42,570 INFO L93 Difference]: Finished difference Result 49199 states and 231557 transitions. [2022-02-15 14:49:42,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 14:49:42,570 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 [2022-02-15 14:49:42,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:42,758 INFO L225 Difference]: With dead ends: 49199 [2022-02-15 14:49:42,758 INFO L226 Difference]: Without dead ends: 49026 [2022-02-15 14:49:42,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-02-15 14:49:42,758 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 80 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:42,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 207 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:49:42,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49026 states. [2022-02-15 14:49:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49026 to 47970. [2022-02-15 14:49:43,895 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) [2022-02-15 14:49:44,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47970 states to 47970 states and 226967 transitions. [2022-02-15 14:49:44,293 INFO L78 Accepts]: Start accepts. Automaton has 47970 states and 226967 transitions. Word has length 25 [2022-02-15 14:49:44,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:44,294 INFO L470 AbstractCegarLoop]: Abstraction has 47970 states and 226967 transitions. [2022-02-15 14:49:44,294 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) [2022-02-15 14:49:44,294 INFO L276 IsEmpty]: Start isEmpty. Operand 47970 states and 226967 transitions. [2022-02-15 14:49:44,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:49:44,432 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:44,432 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] [2022-02-15 14:49:44,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-15 14:49:44,635 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 [2022-02-15 14:49:44,635 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:49:44,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:44,636 INFO L85 PathProgramCache]: Analyzing trace with hash -417418548, now seen corresponding path program 10 times [2022-02-15 14:49:44,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:44,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995600442] [2022-02-15 14:49:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:44,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:44,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:44,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995600442] [2022-02-15 14:49:44,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995600442] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:44,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113256089] [2022-02-15 14:49:44,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:49:44,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:44,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:44,673 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:44,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-15 14:49:44,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:49:44,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:44,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:49:44,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:44,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:44,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113256089] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:44,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:44,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2022-02-15 14:49:44,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55541046] [2022-02-15 14:49:44,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:44,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 14:49:44,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:44,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 14:49:44,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-02-15 14:49:44,894 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) [2022-02-15 14:49:46,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:46,343 INFO L93 Difference]: Finished difference Result 108096 states and 492688 transitions. [2022-02-15 14:49:46,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 14:49:46,344 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 [2022-02-15 14:49:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:47,117 INFO L225 Difference]: With dead ends: 108096 [2022-02-15 14:49:47,117 INFO L226 Difference]: Without dead ends: 107887 [2022-02-15 14:49:47,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=677, Unknown=0, NotChecked=0, Total=992 [2022-02-15 14:49:47,117 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, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:47,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 234 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:49:47,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107887 states. [2022-02-15 14:49:49,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107887 to 93158. [2022-02-15 14:49:49,798 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) [2022-02-15 14:49:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93158 states to 93158 states and 431093 transitions. [2022-02-15 14:49:50,857 INFO L78 Accepts]: Start accepts. Automaton has 93158 states and 431093 transitions. Word has length 25 [2022-02-15 14:49:50,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:50,857 INFO L470 AbstractCegarLoop]: Abstraction has 93158 states and 431093 transitions. [2022-02-15 14:49:50,857 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) [2022-02-15 14:49:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 93158 states and 431093 transitions. [2022-02-15 14:49:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:49:51,142 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:51,142 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] [2022-02-15 14:49:51,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:51,358 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 [2022-02-15 14:49:51,358 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:49:51,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:51,359 INFO L85 PathProgramCache]: Analyzing trace with hash -823215352, now seen corresponding path program 11 times [2022-02-15 14:49:51,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:51,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547426845] [2022-02-15 14:49:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:51,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:51,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:51,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547426845] [2022-02-15 14:49:51,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547426845] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:51,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57876000] [2022-02-15 14:49:51,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:49:51,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:51,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:51,477 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:51,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-15 14:49:51,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:49:51,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:51,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 14:49:51,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:51,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:52,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57876000] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:52,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:52,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-02-15 14:49:52,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785012974] [2022-02-15 14:49:52,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:52,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 14:49:52,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:52,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 14:49:52,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:49:52,027 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) [2022-02-15 14:49:56,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:56,309 INFO L93 Difference]: Finished difference Result 262758 states and 1182106 transitions. [2022-02-15 14:49:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 14:49:56,309 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 [2022-02-15 14:49:56,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:58,108 INFO L225 Difference]: With dead ends: 262758 [2022-02-15 14:49:58,109 INFO L226 Difference]: Without dead ends: 262524 [2022-02-15 14:49:58,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1397, Invalid=3159, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 14:49:58,110 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 573 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2022-02-15 14:49:58,110 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] [2022-02-15 14:49:58,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262524 states. [2022-02-15 14:50:05,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262524 to 153519. [2022-02-15 14:50:05,767 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) [2022-02-15 14:50:07,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153519 states to 153519 states and 703997 transitions. [2022-02-15 14:50:07,322 INFO L78 Accepts]: Start accepts. Automaton has 153519 states and 703997 transitions. Word has length 25 [2022-02-15 14:50:07,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:50:07,322 INFO L470 AbstractCegarLoop]: Abstraction has 153519 states and 703997 transitions. [2022-02-15 14:50:07,322 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) [2022-02-15 14:50:07,322 INFO L276 IsEmpty]: Start isEmpty. Operand 153519 states and 703997 transitions. [2022-02-15 14:50:07,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:50:07,740 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:50:07,740 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] [2022-02-15 14:50:07,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-02-15 14:50:07,940 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 [2022-02-15 14:50:07,940 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:50:07,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:50:07,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1589133496, now seen corresponding path program 12 times [2022-02-15 14:50:07,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:50:07,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329336838] [2022-02-15 14:50:07,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:50:07,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:50:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:50:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:07,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:50:07,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329336838] [2022-02-15 14:50:07,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329336838] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:50:07,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314527677] [2022-02-15 14:50:07,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:50:07,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:07,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:50:07,994 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:50:07,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-15 14:50:08,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:50:08,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:50:08,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 14:50:08,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:50:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:08,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:50:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:08,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314527677] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:50:08,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:50:08,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-02-15 14:50:08,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635498215] [2022-02-15 14:50:08,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:50:08,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 14:50:08,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:50:08,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 14:50:08,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:50:08,353 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) [2022-02-15 14:50:13,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:50:13,472 INFO L93 Difference]: Finished difference Result 330266 states and 1479418 transitions. [2022-02-15 14:50:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 14:50:13,474 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 [2022-02-15 14:50:13,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:50:15,813 INFO L225 Difference]: With dead ends: 330266 [2022-02-15 14:50:15,813 INFO L226 Difference]: Without dead ends: 330266 [2022-02-15 14:50:15,814 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 [2022-02-15 14:50:15,814 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 [2022-02-15 14:50:15,815 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] [2022-02-15 14:50:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330266 states. [2022-02-15 14:50:25,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330266 to 199056. [2022-02-15 14:50:26,173 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) [2022-02-15 14:50:28,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199056 states to 199056 states and 917201 transitions. [2022-02-15 14:50:28,009 INFO L78 Accepts]: Start accepts. Automaton has 199056 states and 917201 transitions. Word has length 25 [2022-02-15 14:50:28,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:50:28,009 INFO L470 AbstractCegarLoop]: Abstraction has 199056 states and 917201 transitions. [2022-02-15 14:50:28,009 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) [2022-02-15 14:50:28,009 INFO L276 IsEmpty]: Start isEmpty. Operand 199056 states and 917201 transitions. [2022-02-15 14:50:28,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:50:28,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:50:28,822 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] [2022-02-15 14:50:28,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-15 14:50:29,031 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 [2022-02-15 14:50:29,031 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-15 14:50:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:50:29,032 INFO L85 PathProgramCache]: Analyzing trace with hash -606187362, now seen corresponding path program 13 times [2022-02-15 14:50:29,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:50:29,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446662038] [2022-02-15 14:50:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:50:29,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:50:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:50:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:29,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:50:29,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446662038] [2022-02-15 14:50:29,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446662038] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:50:29,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424390016] [2022-02-15 14:50:29,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:50:29,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:29,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:50:29,115 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:50:29,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-15 14:50:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:50:29,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 14:50:29,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:50:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:29,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:50:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:29,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424390016] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:50:29,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:50:29,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-02-15 14:50:29,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922518677] [2022-02-15 14:50:29,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:50:29,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 14:50:29,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:50:29,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 14:50:29,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:50:29,488 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) [2022-02-15 14:50:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:50:35,202 INFO L93 Difference]: Finished difference Result 272500 states and 1225177 transitions. [2022-02-15 14:50:35,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 14:50:35,208 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 [2022-02-15 14:50:35,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted.