/usr/bin/java -Xmx16000000000 -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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 14:29:38,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 14:29:38,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 14:29:38,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 14:29:38,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 14:29:38,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 14:29:38,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 14:29:38,480 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-Separate.epf [2022-01-18 14:29:38,497 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 14:29:38,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 14:29:38,498 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 14:29:38,498 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 14:29:38,499 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 14:29:38,499 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 14:29:38,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 14:29:38,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 14:29:38,500 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 14:29:38,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 14:29:38,500 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 14:29:38,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 14:29:38,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 14:29:38,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 14:29:38,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 14:29:38,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 14:29:38,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 14:29:38,501 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 14:29:38,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 14:29:38,501 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 14:29:38,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 14:29:38,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 14:29:38,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 14:29:38,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 14:29:38,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 14:29:38,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:29:38,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 14:29:38,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 14:29:38,503 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 14:29:38,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 14:29:38,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 14:29:38,503 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 14:29:38,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 14:29:38,503 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 14:29:38,503 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 14:29:38,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 14:29:38,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 14:29:38,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 14:29:38,724 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 14:29:38,724 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 14:29:38,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl [2022-01-18 14:29:38,725 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl' [2022-01-18 14:29:38,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 14:29:38,752 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 14:29:38,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 14:29:38,753 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 14:29:38,753 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 14:29:38,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:29:38" (1/1) ... [2022-01-18 14:29:38,768 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:29:38" (1/1) ... [2022-01-18 14:29:38,773 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 14:29:38,774 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 14:29:38,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 14:29:38,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 14:29:38,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 14:29:38,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:29:38" (1/1) ... [2022-01-18 14:29:38,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:29:38" (1/1) ... [2022-01-18 14:29:38,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:29:38" (1/1) ... [2022-01-18 14:29:38,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:29:38" (1/1) ... [2022-01-18 14:29:38,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:29:38" (1/1) ... [2022-01-18 14:29:38,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:29:38" (1/1) ... [2022-01-18 14:29:38,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:29:38" (1/1) ... [2022-01-18 14:29:38,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 14:29:38,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 14:29:38,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 14:29:38,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 14:29:38,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:29:38" (1/1) ... [2022-01-18 14:29:38,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:29:38,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:38,824 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 14:29:38,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 14:29:38,863 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 14:29:38,864 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 14:29:38,864 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 14:29:38,864 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 14:29:38,864 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 14:29:38,864 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 14:29:38,864 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 14:29:38,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 14:29:38,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 14:29:38,865 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 14:29:38,907 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 14:29:38,909 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 14:29:39,018 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 14:29:39,046 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 14:29:39,047 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-18 14:29:39,050 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-01-18 14:29:39,050 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-01-18 14:29:39,053 INFO L202 PluginConnector]: Adding new model unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:29:39 BoogieIcfgContainer [2022-01-18 14:29:39,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 14:29:39,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 14:29:39,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 14:29:39,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 14:29:39,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:29:38" (1/2) ... [2022-01-18 14:29:39,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d81f6dc and model type unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 02:29:39, skipping insertion in model container [2022-01-18 14:29:39,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:29:39" (2/2) ... [2022-01-18 14:29:39,064 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.bpl [2022-01-18 14:29:39,069 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 14:29:39,069 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 14:29:39,069 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 14:29:39,069 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 14:29:39,108 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 14:29:39,152 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 14:29:39,159 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 14:29:39,160 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 14:29:39,168 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2022-01-18 14:29:39,181 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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) [2022-01-18 14:29:39,183 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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) [2022-01-18 14:29:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-18 14:29:39,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:39,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:39,189 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:39,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:39,194 INFO L85 PathProgramCache]: Analyzing trace with hash 119764290, now seen corresponding path program 1 times [2022-01-18 14:29:39,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:39,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427602890] [2022-01-18 14:29:39,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:39,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:39,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:39,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427602890] [2022-01-18 14:29:39,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427602890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:29:39,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:29:39,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 14:29:39,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260132332] [2022-01-18 14:29:39,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:29:39,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 14:29:39,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:39,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 14:29:39,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:29:39,425 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:39,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:39,453 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2022-01-18 14:29:39,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 14:29:39,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-01-18 14:29:39,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:39,478 INFO L225 Difference]: With dead ends: 22 [2022-01-18 14:29:39,478 INFO L226 Difference]: Without dead ends: 19 [2022-01-18 14:29:39,479 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 [2022-01-18 14:29:39,482 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:39,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:29:39,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-18 14:29:39,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-18 14:29:39,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:39,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2022-01-18 14:29:39,529 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2022-01-18 14:29:39,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:39,530 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2022-01-18 14:29:39,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:39,530 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2022-01-18 14:29:39,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-18 14:29:39,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:39,531 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:39,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 14:29:39,531 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:39,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:39,532 INFO L85 PathProgramCache]: Analyzing trace with hash -559196125, now seen corresponding path program 1 times [2022-01-18 14:29:39,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:39,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475614018] [2022-01-18 14:29:39,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:39,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:39,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:39,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475614018] [2022-01-18 14:29:39,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475614018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:29:39,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:29:39,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:29:39,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674922788] [2022-01-18 14:29:39,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:29:39,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:29:39,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:39,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:29:39,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:29:39,576 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:39,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:39,624 INFO L93 Difference]: Finished difference Result 19 states and 30 transitions. [2022-01-18 14:29:39,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:29:39,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-01-18 14:29:39,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:39,626 INFO L225 Difference]: With dead ends: 19 [2022-01-18 14:29:39,626 INFO L226 Difference]: Without dead ends: 15 [2022-01-18 14:29:39,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:29:39,628 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:39,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 5 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:29:39,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-18 14:29:39,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-18 14:29:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2022-01-18 14:29:39,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 25 transitions. [2022-01-18 14:29:39,632 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 25 transitions. Word has length 10 [2022-01-18 14:29:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:39,632 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 25 transitions. [2022-01-18 14:29:39,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:39,633 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 25 transitions. [2022-01-18 14:29:39,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-18 14:29:39,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:39,633 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:39,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 14:29:39,634 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:39,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:39,634 INFO L85 PathProgramCache]: Analyzing trace with hash -619427657, now seen corresponding path program 1 times [2022-01-18 14:29:39,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:39,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137377993] [2022-01-18 14:29:39,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:39,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:39,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:39,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137377993] [2022-01-18 14:29:39,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137377993] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:39,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836275912] [2022-01-18 14:29:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:39,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:39,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:39,673 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:39,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 14:29:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:39,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 14:29:39,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:39,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:39,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836275912] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:39,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:39,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-01-18 14:29:39,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251850574] [2022-01-18 14:29:39,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:39,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:29:39,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:39,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:29:39,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:29:39,856 INFO L87 Difference]: Start difference. First operand 15 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:39,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:39,917 INFO L93 Difference]: Finished difference Result 18 states and 31 transitions. [2022-01-18 14:29:39,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:29:39,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 10 [2022-01-18 14:29:39,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:39,919 INFO L225 Difference]: With dead ends: 18 [2022-01-18 14:29:39,920 INFO L226 Difference]: Without dead ends: 18 [2022-01-18 14:29:39,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:29:39,921 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:39,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:29:39,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-18 14:29:39,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-18 14:29:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2022-01-18 14:29:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2022-01-18 14:29:39,925 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2022-01-18 14:29:39,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:39,925 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2022-01-18 14:29:39,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:39,926 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2022-01-18 14:29:39,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-18 14:29:39,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:39,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:39,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:40,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:40,127 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:40,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:40,128 INFO L85 PathProgramCache]: Analyzing trace with hash -585360549, now seen corresponding path program 2 times [2022-01-18 14:29:40,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:40,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029861547] [2022-01-18 14:29:40,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:40,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:40,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:40,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029861547] [2022-01-18 14:29:40,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029861547] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:29:40,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:29:40,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:29:40,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066031785] [2022-01-18 14:29:40,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:29:40,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:29:40,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:40,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:29:40,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:29:40,172 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:40,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:40,192 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2022-01-18 14:29:40,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:29:40,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-01-18 14:29:40,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:40,193 INFO L225 Difference]: With dead ends: 20 [2022-01-18 14:29:40,193 INFO L226 Difference]: Without dead ends: 20 [2022-01-18 14:29:40,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:29:40,195 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:40,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:29:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-18 14:29:40,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-18 14:29:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:40,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2022-01-18 14:29:40,199 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2022-01-18 14:29:40,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:40,199 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2022-01-18 14:29:40,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2022-01-18 14:29:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-18 14:29:40,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:40,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:40,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 14:29:40,200 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:40,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:40,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1999310002, now seen corresponding path program 1 times [2022-01-18 14:29:40,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:40,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526315602] [2022-01-18 14:29:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:40,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:40,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:40,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526315602] [2022-01-18 14:29:40,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526315602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:40,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407723754] [2022-01-18 14:29:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:40,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:40,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:40,239 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:40,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 14:29:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:40,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:29:40,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:40,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:40,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407723754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:40,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:40,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-01-18 14:29:40,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857845622] [2022-01-18 14:29:40,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:40,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:29:40,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:40,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:29:40,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:29:40,430 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:40,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:40,466 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2022-01-18 14:29:40,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:29:40,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-18 14:29:40,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:40,467 INFO L225 Difference]: With dead ends: 24 [2022-01-18 14:29:40,467 INFO L226 Difference]: Without dead ends: 24 [2022-01-18 14:29:40,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:29:40,469 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:40,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:29:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-18 14:29:40,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-18 14:29:40,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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) [2022-01-18 14:29:40,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2022-01-18 14:29:40,474 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2022-01-18 14:29:40,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:40,474 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2022-01-18 14:29:40,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:40,475 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2022-01-18 14:29:40,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-18 14:29:40,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:40,475 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:40,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:40,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:40,679 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:40,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:40,680 INFO L85 PathProgramCache]: Analyzing trace with hash 601800067, now seen corresponding path program 2 times [2022-01-18 14:29:40,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:40,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941899818] [2022-01-18 14:29:40,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:40,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:40,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:40,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941899818] [2022-01-18 14:29:40,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941899818] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:40,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042818831] [2022-01-18 14:29:40,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:29:40,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:40,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:40,738 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:40,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 14:29:40,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:29:40,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:40,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:29:40,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:40,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:29:40,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2022-01-18 14:29:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:40,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:40,954 INFO L353 Elim1Store]: treesize reduction 10, result has 79.6 percent of original size [2022-01-18 14:29:40,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 11 treesize of output 50 [2022-01-18 14:29:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:41,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042818831] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:41,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:41,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-01-18 14:29:41,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396282367] [2022-01-18 14:29:41,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:41,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:29:41,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:41,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:29:41,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:29:41,038 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2022-01-18 14:29:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:41,122 INFO L93 Difference]: Finished difference Result 54 states and 96 transitions. [2022-01-18 14:29:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:29:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 12 [2022-01-18 14:29:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:41,123 INFO L225 Difference]: With dead ends: 54 [2022-01-18 14:29:41,124 INFO L226 Difference]: Without dead ends: 51 [2022-01-18 14:29:41,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:29:41,125 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:41,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 21 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:41,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-18 14:29:41,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2022-01-18 14:29:41,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:41,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2022-01-18 14:29:41,131 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2022-01-18 14:29:41,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:41,131 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2022-01-18 14:29:41,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2022-01-18 14:29:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2022-01-18 14:29:41,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-18 14:29:41,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:41,132 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:41,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-18 14:29:41,347 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 [2022-01-18 14:29:41,348 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:41,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:41,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1835470653, now seen corresponding path program 3 times [2022-01-18 14:29:41,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:41,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878382892] [2022-01-18 14:29:41,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:41,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:41,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:41,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878382892] [2022-01-18 14:29:41,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878382892] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:41,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596209988] [2022-01-18 14:29:41,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:29:41,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:41,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:41,383 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:41,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 14:29:41,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 14:29:41,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:41,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:29:41,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:41,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:29:41,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2022-01-18 14:29:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:41,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:41,545 INFO L353 Elim1Store]: treesize reduction 10, result has 79.6 percent of original size [2022-01-18 14:29:41,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 11 treesize of output 50 [2022-01-18 14:29:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:41,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596209988] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:41,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:41,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-01-18 14:29:41,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976241156] [2022-01-18 14:29:41,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:41,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:29:41,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:41,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:29:41,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:29:41,612 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2022-01-18 14:29:41,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:41,689 INFO L93 Difference]: Finished difference Result 61 states and 117 transitions. [2022-01-18 14:29:41,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:29:41,690 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 12 [2022-01-18 14:29:41,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:41,690 INFO L225 Difference]: With dead ends: 61 [2022-01-18 14:29:41,691 INFO L226 Difference]: Without dead ends: 58 [2022-01-18 14:29:41,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:29:41,692 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:41,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:41,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-18 14:29:41,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2022-01-18 14:29:41,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 87 transitions. [2022-01-18 14:29:41,698 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 87 transitions. Word has length 12 [2022-01-18 14:29:41,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:41,699 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 87 transitions. [2022-01-18 14:29:41,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2022-01-18 14:29:41,699 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 87 transitions. [2022-01-18 14:29:41,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-18 14:29:41,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:41,700 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:41,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:41,913 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 [2022-01-18 14:29:41,913 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:41,914 INFO L85 PathProgramCache]: Analyzing trace with hash 729645499, now seen corresponding path program 4 times [2022-01-18 14:29:41,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:41,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871118062] [2022-01-18 14:29:41,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:41,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:41,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:41,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871118062] [2022-01-18 14:29:41,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871118062] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:41,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154538626] [2022-01-18 14:29:41,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:29:41,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:41,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:41,951 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:41,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 14:29:41,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:29:41,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:41,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:29:41,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:42,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:29:42,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2022-01-18 14:29:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:42,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:42,096 INFO L353 Elim1Store]: treesize reduction 10, result has 79.6 percent of original size [2022-01-18 14:29:42,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 11 treesize of output 50 [2022-01-18 14:29:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:42,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154538626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:42,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:42,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 7 [2022-01-18 14:29:42,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090364508] [2022-01-18 14:29:42,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:42,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:29:42,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:42,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:29:42,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:29:42,166 INFO L87 Difference]: Start difference. First operand 39 states and 87 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:42,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:42,229 INFO L93 Difference]: Finished difference Result 68 states and 138 transitions. [2022-01-18 14:29:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:29:42,229 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 12 [2022-01-18 14:29:42,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:42,230 INFO L225 Difference]: With dead ends: 68 [2022-01-18 14:29:42,231 INFO L226 Difference]: Without dead ends: 65 [2022-01-18 14:29:42,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:29:42,231 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:42,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:42,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-18 14:29:42,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2022-01-18 14:29:42,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.4) internal successors, (108), 45 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:42,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 108 transitions. [2022-01-18 14:29:42,248 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 108 transitions. Word has length 12 [2022-01-18 14:29:42,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:42,248 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 108 transitions. [2022-01-18 14:29:42,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:42,249 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 108 transitions. [2022-01-18 14:29:42,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:29:42,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:42,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:42,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:42,449 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 [2022-01-18 14:29:42,450 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:42,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:42,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1499011074, now seen corresponding path program 5 times [2022-01-18 14:29:42,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:42,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729761495] [2022-01-18 14:29:42,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:42,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:42,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:42,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729761495] [2022-01-18 14:29:42,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729761495] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:42,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545050372] [2022-01-18 14:29:42,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:29:42,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:42,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:42,500 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:42,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 14:29:42,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:29:42,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:42,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:29:42,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:42,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:42,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545050372] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:42,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:42,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 14:29:42,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043870186] [2022-01-18 14:29:42,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:42,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:29:42,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:42,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:29:42,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:29:42,625 INFO L87 Difference]: Start difference. First operand 46 states and 108 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2022-01-18 14:29:42,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:42,719 INFO L93 Difference]: Finished difference Result 84 states and 166 transitions. [2022-01-18 14:29:42,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:29:42,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 13 [2022-01-18 14:29:42,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:42,721 INFO L225 Difference]: With dead ends: 84 [2022-01-18 14:29:42,721 INFO L226 Difference]: Without dead ends: 79 [2022-01-18 14:29:42,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:29:42,724 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 57 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:42,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 19 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:42,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-18 14:29:42,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2022-01-18 14:29:42,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.44) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:42,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 122 transitions. [2022-01-18 14:29:42,730 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 122 transitions. Word has length 13 [2022-01-18 14:29:42,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:42,730 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 122 transitions. [2022-01-18 14:29:42,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2022-01-18 14:29:42,730 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 122 transitions. [2022-01-18 14:29:42,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:29:42,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:42,731 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:42,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-18 14:29:42,939 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 [2022-01-18 14:29:42,939 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:42,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:42,940 INFO L85 PathProgramCache]: Analyzing trace with hash -368166418, now seen corresponding path program 6 times [2022-01-18 14:29:42,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:42,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756567699] [2022-01-18 14:29:42,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:42,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:42,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:42,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756567699] [2022-01-18 14:29:42,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756567699] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:42,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969573588] [2022-01-18 14:29:42,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:29:42,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:42,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:42,989 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:42,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 14:29:43,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:29:43,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:43,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:29:43,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:43,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:43,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969573588] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:43,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:43,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 14:29:43,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385996950] [2022-01-18 14:29:43,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:43,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:29:43,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:43,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:29:43,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:29:43,119 INFO L87 Difference]: Start difference. First operand 51 states and 122 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2022-01-18 14:29:43,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:43,234 INFO L93 Difference]: Finished difference Result 104 states and 194 transitions. [2022-01-18 14:29:43,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:29:43,235 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 13 [2022-01-18 14:29:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:43,236 INFO L225 Difference]: With dead ends: 104 [2022-01-18 14:29:43,236 INFO L226 Difference]: Without dead ends: 102 [2022-01-18 14:29:43,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:29:43,237 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:43,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 37 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:43,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-18 14:29:43,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 56. [2022-01-18 14:29:43,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.418181818181818) internal successors, (133), 55 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 133 transitions. [2022-01-18 14:29:43,245 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 133 transitions. Word has length 13 [2022-01-18 14:29:43,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:43,246 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 133 transitions. [2022-01-18 14:29:43,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2022-01-18 14:29:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 133 transitions. [2022-01-18 14:29:43,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:29:43,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:43,247 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:43,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:43,463 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 [2022-01-18 14:29:43,463 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:43,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:43,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1891151348, now seen corresponding path program 7 times [2022-01-18 14:29:43,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:43,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660028003] [2022-01-18 14:29:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:43,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:43,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:43,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660028003] [2022-01-18 14:29:43,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660028003] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:43,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419698009] [2022-01-18 14:29:43,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:29:43,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:43,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:43,503 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:43,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 14:29:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:43,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:29:43,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:43,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:43,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419698009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:43,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:43,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-18 14:29:43,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97922527] [2022-01-18 14:29:43,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:43,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:29:43,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:43,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:29:43,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:29:43,622 INFO L87 Difference]: Start difference. First operand 56 states and 133 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2022-01-18 14:29:43,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:43,722 INFO L93 Difference]: Finished difference Result 80 states and 164 transitions. [2022-01-18 14:29:43,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:29:43,722 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 13 [2022-01-18 14:29:43,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:43,723 INFO L225 Difference]: With dead ends: 80 [2022-01-18 14:29:43,723 INFO L226 Difference]: Without dead ends: 79 [2022-01-18 14:29:43,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:29:43,724 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:43,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 21 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:43,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-18 14:29:43,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2022-01-18 14:29:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.375) internal successors, (133), 56 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:43,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2022-01-18 14:29:43,741 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 13 [2022-01-18 14:29:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:43,741 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2022-01-18 14:29:43,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2022-01-18 14:29:43,741 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2022-01-18 14:29:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:29:43,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:43,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:43,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:43,955 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 [2022-01-18 14:29:43,955 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:43,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:43,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1030429776, now seen corresponding path program 8 times [2022-01-18 14:29:43,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:43,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381886482] [2022-01-18 14:29:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:43,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:43,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:43,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381886482] [2022-01-18 14:29:43,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381886482] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:43,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081512479] [2022-01-18 14:29:43,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:29:43,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:43,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:43,997 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:44,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 14:29:44,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:29:44,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:44,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:29:44,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:44,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:44,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081512479] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:44,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:44,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-18 14:29:44,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876032831] [2022-01-18 14:29:44,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:44,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:29:44,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:44,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:29:44,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:29:44,131 INFO L87 Difference]: Start difference. First operand 57 states and 133 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2022-01-18 14:29:44,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:44,189 INFO L93 Difference]: Finished difference Result 88 states and 173 transitions. [2022-01-18 14:29:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:29:44,189 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 13 [2022-01-18 14:29:44,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:44,190 INFO L225 Difference]: With dead ends: 88 [2022-01-18 14:29:44,190 INFO L226 Difference]: Without dead ends: 88 [2022-01-18 14:29:44,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:29:44,191 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:44,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:29:44,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-18 14:29:44,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 57. [2022-01-18 14:29:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.375) internal successors, (133), 56 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2022-01-18 14:29:44,194 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 13 [2022-01-18 14:29:44,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:44,194 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2022-01-18 14:29:44,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2022-01-18 14:29:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2022-01-18 14:29:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:29:44,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:44,195 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:44,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:44,415 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 [2022-01-18 14:29:44,416 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:44,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1041937214, now seen corresponding path program 9 times [2022-01-18 14:29:44,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:44,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199516370] [2022-01-18 14:29:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:44,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:44,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:44,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199516370] [2022-01-18 14:29:44,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199516370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:44,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621540171] [2022-01-18 14:29:44,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:29:44,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:44,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:44,452 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:44,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 14:29:44,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 14:29:44,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:44,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:29:44,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:44,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:44,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621540171] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:44,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:44,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-18 14:29:44,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514322306] [2022-01-18 14:29:44,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:44,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:29:44,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:44,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:29:44,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:29:44,587 INFO L87 Difference]: Start difference. First operand 57 states and 133 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2022-01-18 14:29:44,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:44,698 INFO L93 Difference]: Finished difference Result 96 states and 174 transitions. [2022-01-18 14:29:44,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:29:44,698 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 13 [2022-01-18 14:29:44,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:44,699 INFO L225 Difference]: With dead ends: 96 [2022-01-18 14:29:44,699 INFO L226 Difference]: Without dead ends: 92 [2022-01-18 14:29:44,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:29:44,700 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 52 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:44,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 25 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-18 14:29:44,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 57. [2022-01-18 14:29:44,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.3392857142857144) internal successors, (131), 56 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:44,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 131 transitions. [2022-01-18 14:29:44,703 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 131 transitions. Word has length 13 [2022-01-18 14:29:44,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:44,703 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 131 transitions. [2022-01-18 14:29:44,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2022-01-18 14:29:44,704 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 131 transitions. [2022-01-18 14:29:44,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:29:44,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:44,704 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:44,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:44,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 14:29:44,919 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:44,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:44,920 INFO L85 PathProgramCache]: Analyzing trace with hash -240320986, now seen corresponding path program 10 times [2022-01-18 14:29:44,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:44,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985054155] [2022-01-18 14:29:44,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:44,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:44,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:44,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985054155] [2022-01-18 14:29:44,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985054155] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:44,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469720142] [2022-01-18 14:29:44,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:29:44,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:44,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:44,961 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:44,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:29:44,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:44,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 14:29:44,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:29:44,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:45,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:45,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469720142] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:45,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:45,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-18 14:29:45,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541771916] [2022-01-18 14:29:45,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:45,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:29:45,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:45,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:29:45,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:29:45,091 INFO L87 Difference]: Start difference. First operand 57 states and 131 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2022-01-18 14:29:45,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:45,134 INFO L93 Difference]: Finished difference Result 95 states and 188 transitions. [2022-01-18 14:29:45,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:29:45,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 13 [2022-01-18 14:29:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:45,135 INFO L225 Difference]: With dead ends: 95 [2022-01-18 14:29:45,135 INFO L226 Difference]: Without dead ends: 95 [2022-01-18 14:29:45,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:29:45,136 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:45,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 19 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:29:45,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-18 14:29:45,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 60. [2022-01-18 14:29:45,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.389830508474576) internal successors, (141), 59 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 141 transitions. [2022-01-18 14:29:45,140 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 141 transitions. Word has length 13 [2022-01-18 14:29:45,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:45,140 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 141 transitions. [2022-01-18 14:29:45,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2022-01-18 14:29:45,140 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 141 transitions. [2022-01-18 14:29:45,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:29:45,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:45,141 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:45,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:45,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 14:29:45,362 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:45,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:45,363 INFO L85 PathProgramCache]: Analyzing trace with hash 673964804, now seen corresponding path program 11 times [2022-01-18 14:29:45,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:45,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637216766] [2022-01-18 14:29:45,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:45,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:45,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:45,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637216766] [2022-01-18 14:29:45,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637216766] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:45,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909187688] [2022-01-18 14:29:45,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:29:45,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:45,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:45,403 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:45,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 14:29:45,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:29:45,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:45,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:29:45,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:45,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:45,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909187688] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:45,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:45,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-18 14:29:45,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535701313] [2022-01-18 14:29:45,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:45,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:29:45,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:45,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:29:45,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:29:45,520 INFO L87 Difference]: Start difference. First operand 60 states and 141 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2022-01-18 14:29:45,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:45,605 INFO L93 Difference]: Finished difference Result 106 states and 201 transitions. [2022-01-18 14:29:45,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:29:45,605 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 13 [2022-01-18 14:29:45,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:45,606 INFO L225 Difference]: With dead ends: 106 [2022-01-18 14:29:45,606 INFO L226 Difference]: Without dead ends: 105 [2022-01-18 14:29:45,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:29:45,607 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:45,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 25 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:45,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-18 14:29:45,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 60. [2022-01-18 14:29:45,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.3728813559322033) internal successors, (140), 59 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:45,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 140 transitions. [2022-01-18 14:29:45,610 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 140 transitions. Word has length 13 [2022-01-18 14:29:45,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:45,611 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 140 transitions. [2022-01-18 14:29:45,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2022-01-18 14:29:45,611 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 140 transitions. [2022-01-18 14:29:45,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:29:45,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:45,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:45,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:45,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 14:29:45,823 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:45,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:45,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1534686376, now seen corresponding path program 12 times [2022-01-18 14:29:45,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:45,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454240509] [2022-01-18 14:29:45,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:45,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:45,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:45,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454240509] [2022-01-18 14:29:45,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454240509] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:45,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626854533] [2022-01-18 14:29:45,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:29:45,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:45,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:45,860 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:45,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 14:29:45,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:29:45,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:45,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:29:45,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:45,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:46,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626854533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:46,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:46,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-18 14:29:46,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691043506] [2022-01-18 14:29:46,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:46,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:29:46,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:46,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:29:46,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:29:46,006 INFO L87 Difference]: Start difference. First operand 60 states and 140 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2022-01-18 14:29:46,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:46,077 INFO L93 Difference]: Finished difference Result 86 states and 170 transitions. [2022-01-18 14:29:46,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:29:46,077 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 13 [2022-01-18 14:29:46,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:46,077 INFO L225 Difference]: With dead ends: 86 [2022-01-18 14:29:46,078 INFO L226 Difference]: Without dead ends: 86 [2022-01-18 14:29:46,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:29:46,078 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:46,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 27 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:46,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-18 14:29:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2022-01-18 14:29:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.3728813559322033) internal successors, (140), 59 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 140 transitions. [2022-01-18 14:29:46,081 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 140 transitions. Word has length 13 [2022-01-18 14:29:46,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:46,081 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 140 transitions. [2022-01-18 14:29:46,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2022-01-18 14:29:46,081 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 140 transitions. [2022-01-18 14:29:46,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:29:46,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:46,082 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:46,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:46,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 14:29:46,291 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:46,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:46,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1529271458, now seen corresponding path program 13 times [2022-01-18 14:29:46,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:46,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829940199] [2022-01-18 14:29:46,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:46,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:46,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:46,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829940199] [2022-01-18 14:29:46,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829940199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:46,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314828361] [2022-01-18 14:29:46,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:29:46,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:46,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:46,327 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:46,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 14:29:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:46,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:29:46,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:46,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:46,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314828361] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:46,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:46,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 14:29:46,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667336913] [2022-01-18 14:29:46,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:46,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:29:46,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:46,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:29:46,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:29:46,439 INFO L87 Difference]: Start difference. First operand 60 states and 140 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:46,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:46,523 INFO L93 Difference]: Finished difference Result 99 states and 192 transitions. [2022-01-18 14:29:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:29:46,523 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 14:29:46,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:46,524 INFO L225 Difference]: With dead ends: 99 [2022-01-18 14:29:46,524 INFO L226 Difference]: Without dead ends: 97 [2022-01-18 14:29:46,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:29:46,524 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:46,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 23 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-18 14:29:46,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 61. [2022-01-18 14:29:46,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.35) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:46,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 141 transitions. [2022-01-18 14:29:46,527 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 141 transitions. Word has length 13 [2022-01-18 14:29:46,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:46,528 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 141 transitions. [2022-01-18 14:29:46,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:46,528 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 141 transitions. [2022-01-18 14:29:46,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:29:46,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:46,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:46,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:46,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:46,749 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:46,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:46,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1049667612, now seen corresponding path program 14 times [2022-01-18 14:29:46,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:46,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22539526] [2022-01-18 14:29:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:46,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:46,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:46,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22539526] [2022-01-18 14:29:46,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22539526] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:46,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084235825] [2022-01-18 14:29:46,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:29:46,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:46,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:46,783 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:46,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 14:29:46,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:29:46,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:46,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:29:46,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:46,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:46,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084235825] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:46,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:46,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 14:29:46,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764365248] [2022-01-18 14:29:46,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:46,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:29:46,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:46,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:29:46,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:29:46,900 INFO L87 Difference]: Start difference. First operand 61 states and 141 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:46,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:46,996 INFO L93 Difference]: Finished difference Result 92 states and 177 transitions. [2022-01-18 14:29:46,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:29:46,996 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 14:29:46,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:46,997 INFO L225 Difference]: With dead ends: 92 [2022-01-18 14:29:46,997 INFO L226 Difference]: Without dead ends: 92 [2022-01-18 14:29:46,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:29:46,998 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:46,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 19 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:46,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-18 14:29:47,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 61. [2022-01-18 14:29:47,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.35) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:47,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 141 transitions. [2022-01-18 14:29:47,001 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 141 transitions. Word has length 13 [2022-01-18 14:29:47,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:47,001 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 141 transitions. [2022-01-18 14:29:47,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:47,001 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 141 transitions. [2022-01-18 14:29:47,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:29:47,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:47,001 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:47,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:47,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 14:29:47,202 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:47,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:47,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1167252170, now seen corresponding path program 15 times [2022-01-18 14:29:47,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:47,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401088115] [2022-01-18 14:29:47,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:47,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:47,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:47,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401088115] [2022-01-18 14:29:47,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401088115] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:47,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597769229] [2022-01-18 14:29:47,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:29:47,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:47,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:47,237 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:47,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 14:29:47,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:29:47,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:47,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:29:47,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:47,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:47,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597769229] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:47,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:47,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-18 14:29:47,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782737720] [2022-01-18 14:29:47,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:47,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:29:47,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:47,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:29:47,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:29:47,348 INFO L87 Difference]: Start difference. First operand 61 states and 141 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:47,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:47,466 INFO L93 Difference]: Finished difference Result 114 states and 209 transitions. [2022-01-18 14:29:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:29:47,467 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 14:29:47,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:47,467 INFO L225 Difference]: With dead ends: 114 [2022-01-18 14:29:47,467 INFO L226 Difference]: Without dead ends: 110 [2022-01-18 14:29:47,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:29:47,468 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 59 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:47,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 27 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:47,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-18 14:29:47,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 65. [2022-01-18 14:29:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.453125) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:47,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2022-01-18 14:29:47,471 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 13 [2022-01-18 14:29:47,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:47,471 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2022-01-18 14:29:47,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:47,471 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2022-01-18 14:29:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:29:47,472 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:47,472 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:47,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:47,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:47,673 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:47,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1968868398, now seen corresponding path program 16 times [2022-01-18 14:29:47,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:47,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837072715] [2022-01-18 14:29:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:47,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:47,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:47,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837072715] [2022-01-18 14:29:47,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837072715] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:47,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539077000] [2022-01-18 14:29:47,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:29:47,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:47,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:47,704 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:47,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 14:29:47,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:29:47,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:47,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:29:47,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:47,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:47,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539077000] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:47,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:47,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-18 14:29:47,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856817498] [2022-01-18 14:29:47,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:47,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:29:47,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:47,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:29:47,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:29:47,825 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:47,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:47,872 INFO L93 Difference]: Finished difference Result 116 states and 237 transitions. [2022-01-18 14:29:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:29:47,872 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 14:29:47,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:47,873 INFO L225 Difference]: With dead ends: 116 [2022-01-18 14:29:47,873 INFO L226 Difference]: Without dead ends: 116 [2022-01-18 14:29:47,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:29:47,873 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:47,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 21 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:29:47,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-18 14:29:47,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 69. [2022-01-18 14:29:47,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.5294117647058822) internal successors, (172), 68 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:47,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 172 transitions. [2022-01-18 14:29:47,876 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 172 transitions. Word has length 13 [2022-01-18 14:29:47,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:47,877 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 172 transitions. [2022-01-18 14:29:47,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:47,877 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 172 transitions. [2022-01-18 14:29:47,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:29:47,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:47,877 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:47,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:48,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:48,087 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:48,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:48,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1411813108, now seen corresponding path program 17 times [2022-01-18 14:29:48,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:48,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048969912] [2022-01-18 14:29:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:48,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:48,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:48,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048969912] [2022-01-18 14:29:48,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048969912] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:48,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192046416] [2022-01-18 14:29:48,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:29:48,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:48,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:48,126 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:48,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:29:48,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:48,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 14:29:48,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:29:48,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:48,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:48,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192046416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:48,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:48,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-18 14:29:48,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138645375] [2022-01-18 14:29:48,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:48,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:29:48,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:48,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:29:48,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:29:48,255 INFO L87 Difference]: Start difference. First operand 69 states and 172 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:48,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:48,335 INFO L93 Difference]: Finished difference Result 117 states and 236 transitions. [2022-01-18 14:29:48,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:29:48,336 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 14:29:48,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:48,337 INFO L225 Difference]: With dead ends: 117 [2022-01-18 14:29:48,337 INFO L226 Difference]: Without dead ends: 116 [2022-01-18 14:29:48,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:29:48,337 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 64 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:48,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 17 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:48,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-18 14:29:48,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 69. [2022-01-18 14:29:48,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.514705882352941) internal successors, (171), 68 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:48,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2022-01-18 14:29:48,340 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 13 [2022-01-18 14:29:48,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:48,340 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2022-01-18 14:29:48,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:48,341 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2022-01-18 14:29:48,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:29:48,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:48,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:48,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:48,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:48,551 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:48,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:48,552 INFO L85 PathProgramCache]: Analyzing trace with hash -551091536, now seen corresponding path program 18 times [2022-01-18 14:29:48,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:48,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075648972] [2022-01-18 14:29:48,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:48,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:48,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:48,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075648972] [2022-01-18 14:29:48,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075648972] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:48,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141614083] [2022-01-18 14:29:48,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:29:48,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:48,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:48,585 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:48,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 14:29:48,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:29:48,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:48,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:29:48,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:48,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:48,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141614083] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:48,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:48,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-18 14:29:48,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679687907] [2022-01-18 14:29:48,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:48,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:29:48,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:48,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:29:48,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:29:48,722 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:48,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:48,800 INFO L93 Difference]: Finished difference Result 92 states and 191 transitions. [2022-01-18 14:29:48,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:29:48,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 14:29:48,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:48,801 INFO L225 Difference]: With dead ends: 92 [2022-01-18 14:29:48,801 INFO L226 Difference]: Without dead ends: 91 [2022-01-18 14:29:48,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:29:48,802 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:48,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:29:48,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-18 14:29:48,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 67. [2022-01-18 14:29:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.4393939393939394) internal successors, (161), 66 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:48,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 161 transitions. [2022-01-18 14:29:48,805 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 161 transitions. Word has length 13 [2022-01-18 14:29:48,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:48,805 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 161 transitions. [2022-01-18 14:29:48,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:48,805 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 161 transitions. [2022-01-18 14:29:48,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:29:48,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:48,805 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:48,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:49,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:49,011 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:49,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:49,012 INFO L85 PathProgramCache]: Analyzing trace with hash -556506454, now seen corresponding path program 19 times [2022-01-18 14:29:49,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:49,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483085636] [2022-01-18 14:29:49,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:49,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:49,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:49,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483085636] [2022-01-18 14:29:49,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483085636] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:49,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591457877] [2022-01-18 14:29:49,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:29:49,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:49,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:49,048 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:49,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 14:29:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:49,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:29:49,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:49,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:49,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591457877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:49,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:49,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 14:29:49,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540593021] [2022-01-18 14:29:49,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:49,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:29:49,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:49,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:29:49,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:29:49,150 INFO L87 Difference]: Start difference. First operand 67 states and 161 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2022-01-18 14:29:49,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:49,245 INFO L93 Difference]: Finished difference Result 118 states and 229 transitions. [2022-01-18 14:29:49,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:29:49,246 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 13 [2022-01-18 14:29:49,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:49,246 INFO L225 Difference]: With dead ends: 118 [2022-01-18 14:29:49,246 INFO L226 Difference]: Without dead ends: 116 [2022-01-18 14:29:49,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:29:49,247 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 91 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:49,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 17 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:49,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-18 14:29:49,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 67. [2022-01-18 14:29:49,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.4242424242424243) internal successors, (160), 66 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:49,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 160 transitions. [2022-01-18 14:29:49,250 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 160 transitions. Word has length 13 [2022-01-18 14:29:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:49,250 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 160 transitions. [2022-01-18 14:29:49,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2022-01-18 14:29:49,251 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 160 transitions. [2022-01-18 14:29:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:29:49,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:49,251 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:49,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:49,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 14:29:49,463 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:49,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:49,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1159521772, now seen corresponding path program 20 times [2022-01-18 14:29:49,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:49,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119886098] [2022-01-18 14:29:49,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:49,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:49,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:49,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119886098] [2022-01-18 14:29:49,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119886098] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:49,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192651949] [2022-01-18 14:29:49,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:29:49,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:49,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:49,503 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) [2022-01-18 14:29:49,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 14:29:49,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:29:49,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:49,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:29:49,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:49,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:49,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:49,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192651949] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:49,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:49,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 14:29:49,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175607559] [2022-01-18 14:29:49,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:49,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:29:49,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:49,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:29:49,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:29:49,617 INFO L87 Difference]: Start difference. First operand 67 states and 160 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2022-01-18 14:29:49,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:49,729 INFO L93 Difference]: Finished difference Result 107 states and 206 transitions. [2022-01-18 14:29:49,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:29:49,729 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 13 [2022-01-18 14:29:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:49,730 INFO L225 Difference]: With dead ends: 107 [2022-01-18 14:29:49,730 INFO L226 Difference]: Without dead ends: 107 [2022-01-18 14:29:49,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:29:49,731 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 40 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:49,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 43 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:49,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-18 14:29:49,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 67. [2022-01-18 14:29:49,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.4242424242424243) internal successors, (160), 66 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:49,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 160 transitions. [2022-01-18 14:29:49,733 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 160 transitions. Word has length 13 [2022-01-18 14:29:49,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:49,734 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 160 transitions. [2022-01-18 14:29:49,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2022-01-18 14:29:49,734 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 160 transitions. [2022-01-18 14:29:49,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:29:49,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:49,734 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:49,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:49,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-18 14:29:49,955 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:49,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:49,956 INFO L85 PathProgramCache]: Analyzing trace with hash 188196044, now seen corresponding path program 21 times [2022-01-18 14:29:49,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:49,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823447734] [2022-01-18 14:29:49,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:49,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:49,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:49,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823447734] [2022-01-18 14:29:49,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823447734] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:49,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853658332] [2022-01-18 14:29:49,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:29:49,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:49,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:49,989 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) [2022-01-18 14:29:49,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 14:29:50,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:29:50,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:50,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:29:50,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:50,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:50,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853658332] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:50,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:50,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-01-18 14:29:50,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852948223] [2022-01-18 14:29:50,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:50,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:29:50,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:50,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:29:50,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:29:50,091 INFO L87 Difference]: Start difference. First operand 67 states and 160 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:50,171 INFO L93 Difference]: Finished difference Result 101 states and 222 transitions. [2022-01-18 14:29:50,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:29:50,171 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 14:29:50,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:50,172 INFO L225 Difference]: With dead ends: 101 [2022-01-18 14:29:50,172 INFO L226 Difference]: Without dead ends: 98 [2022-01-18 14:29:50,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:29:50,172 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 51 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:50,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 13 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:29:50,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-18 14:29:50,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2022-01-18 14:29:50,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.4307692307692306) internal successors, (158), 65 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 158 transitions. [2022-01-18 14:29:50,175 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 158 transitions. Word has length 13 [2022-01-18 14:29:50,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:50,175 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 158 transitions. [2022-01-18 14:29:50,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:50,175 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 158 transitions. [2022-01-18 14:29:50,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:29:50,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:50,176 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:50,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:50,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:50,376 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:50,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:50,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1646040528, now seen corresponding path program 22 times [2022-01-18 14:29:50,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:50,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612491738] [2022-01-18 14:29:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:50,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:50,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:50,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612491738] [2022-01-18 14:29:50,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612491738] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:50,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459853660] [2022-01-18 14:29:50,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:29:50,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:50,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:50,410 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) [2022-01-18 14:29:50,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 14:29:50,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:29:50,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:50,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:29:50,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:50,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:50,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459853660] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:50,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:50,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-01-18 14:29:50,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995936302] [2022-01-18 14:29:50,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:50,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:29:50,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:50,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:29:50,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:29:50,517 INFO L87 Difference]: Start difference. First operand 66 states and 158 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:50,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:50,603 INFO L93 Difference]: Finished difference Result 93 states and 203 transitions. [2022-01-18 14:29:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:29:50,603 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 14:29:50,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:50,604 INFO L225 Difference]: With dead ends: 93 [2022-01-18 14:29:50,604 INFO L226 Difference]: Without dead ends: 93 [2022-01-18 14:29:50,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:29:50,605 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:50,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 25 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-18 14:29:50,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2022-01-18 14:29:50,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.4507042253521125) internal successors, (174), 71 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:50,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 174 transitions. [2022-01-18 14:29:50,607 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 174 transitions. Word has length 13 [2022-01-18 14:29:50,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:50,608 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 174 transitions. [2022-01-18 14:29:50,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:50,608 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 174 transitions. [2022-01-18 14:29:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 14:29:50,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:50,608 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:50,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 14:29:50,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:50,823 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:50,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:50,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1494821111, now seen corresponding path program 23 times [2022-01-18 14:29:50,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:50,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640677176] [2022-01-18 14:29:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:50,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:29:50,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:50,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640677176] [2022-01-18 14:29:50,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640677176] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:50,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155998704] [2022-01-18 14:29:50,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:29:50,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:50,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:50,859 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) [2022-01-18 14:29:50,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 14:29:50,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:29:50,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:50,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:29:50,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:29:50,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:29:50,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155998704] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:50,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:50,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2022-01-18 14:29:50,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561983562] [2022-01-18 14:29:50,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:50,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:29:50,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:50,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:29:50,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:29:50,969 INFO L87 Difference]: Start difference. First operand 72 states and 174 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:51,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:51,037 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2022-01-18 14:29:51,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:29:51,038 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 14:29:51,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:51,039 INFO L225 Difference]: With dead ends: 164 [2022-01-18 14:29:51,039 INFO L226 Difference]: Without dead ends: 162 [2022-01-18 14:29:51,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:29:51,039 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:51,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 13 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:29:51,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-18 14:29:51,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 90. [2022-01-18 14:29:51,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.460674157303371) internal successors, (219), 89 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 219 transitions. [2022-01-18 14:29:51,043 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 219 transitions. Word has length 14 [2022-01-18 14:29:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:51,043 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 219 transitions. [2022-01-18 14:29:51,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:51,043 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 219 transitions. [2022-01-18 14:29:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:29:51,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:51,044 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:51,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:51,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 14:29:51,244 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:51,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:51,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1364932258, now seen corresponding path program 24 times [2022-01-18 14:29:51,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:51,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336299642] [2022-01-18 14:29:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:51,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:51,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:51,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336299642] [2022-01-18 14:29:51,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336299642] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:51,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107997444] [2022-01-18 14:29:51,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:29:51,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:51,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:51,283 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) [2022-01-18 14:29:51,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 14:29:51,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:29:51,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:51,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:29:51,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:51,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:29:51,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-01-18 14:29:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:51,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:51,703 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-01-18 14:29:51,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-01-18 14:29:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:53,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107997444] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:53,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:53,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 15 [2022-01-18 14:29:53,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422581886] [2022-01-18 14:29:53,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:53,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:29:53,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:53,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:29:53,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:29:53,323 INFO L87 Difference]: Start difference. First operand 90 states and 219 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2022-01-18 14:29:53,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:53,474 INFO L93 Difference]: Finished difference Result 145 states and 324 transitions. [2022-01-18 14:29:53,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:29:53,474 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 15 [2022-01-18 14:29:53,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:53,475 INFO L225 Difference]: With dead ends: 145 [2022-01-18 14:29:53,475 INFO L226 Difference]: Without dead ends: 142 [2022-01-18 14:29:53,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:29:53,475 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 26 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:53,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 33 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:53,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-18 14:29:53,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 114. [2022-01-18 14:29:53,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.4867256637168142) internal successors, (281), 113 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:53,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 281 transitions. [2022-01-18 14:29:53,479 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 281 transitions. Word has length 15 [2022-01-18 14:29:53,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:53,479 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 281 transitions. [2022-01-18 14:29:53,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2022-01-18 14:29:53,479 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 281 transitions. [2022-01-18 14:29:53,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:29:53,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:53,480 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:53,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:53,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 14:29:53,691 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:53,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:53,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1183746428, now seen corresponding path program 25 times [2022-01-18 14:29:53,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:53,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788352236] [2022-01-18 14:29:53,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:53,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:53,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:53,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788352236] [2022-01-18 14:29:53,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788352236] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:53,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299261197] [2022-01-18 14:29:53,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:29:53,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:53,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:53,729 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) [2022-01-18 14:29:53,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 14:29:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:53,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:29:53,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:53,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:29:53,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-01-18 14:29:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:53,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:54,143 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-01-18 14:29:54,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-01-18 14:29:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:57,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299261197] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:57,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:57,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 16 [2022-01-18 14:29:57,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968758359] [2022-01-18 14:29:57,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:57,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:29:57,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:57,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:29:57,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:29:57,302 INFO L87 Difference]: Start difference. First operand 114 states and 281 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:57,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:57,412 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2022-01-18 14:29:57,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:29:57,413 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:29:57,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:57,414 INFO L225 Difference]: With dead ends: 168 [2022-01-18 14:29:57,414 INFO L226 Difference]: Without dead ends: 162 [2022-01-18 14:29:57,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:29:57,415 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:57,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 20 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:57,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-18 14:29:57,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 132. [2022-01-18 14:29:57,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.5801526717557253) internal successors, (338), 131 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 338 transitions. [2022-01-18 14:29:57,419 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 338 transitions. Word has length 15 [2022-01-18 14:29:57,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:57,420 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 338 transitions. [2022-01-18 14:29:57,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:57,420 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 338 transitions. [2022-01-18 14:29:57,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:29:57,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:57,420 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:57,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:57,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 14:29:57,621 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:57,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:57,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1780119344, now seen corresponding path program 26 times [2022-01-18 14:29:57,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:57,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219658382] [2022-01-18 14:29:57,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:57,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:29:57,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:57,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219658382] [2022-01-18 14:29:57,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219658382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:57,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235133142] [2022-01-18 14:29:57,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:29:57,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:57,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:57,657 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) [2022-01-18 14:29:57,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 14:29:57,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:29:57,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:57,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:29:57,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:57,769 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:29:57,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-01-18 14:29:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:57,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:58,015 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-01-18 14:29:58,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-01-18 14:30:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:00,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235133142] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:00,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:00,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 15 [2022-01-18 14:30:00,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3394752] [2022-01-18 14:30:00,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:00,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:30:00,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:00,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:30:00,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:30:00,320 INFO L87 Difference]: Start difference. First operand 132 states and 338 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2022-01-18 14:30:00,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:00,442 INFO L93 Difference]: Finished difference Result 206 states and 494 transitions. [2022-01-18 14:30:00,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:30:00,442 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 15 [2022-01-18 14:30:00,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:00,443 INFO L225 Difference]: With dead ends: 206 [2022-01-18 14:30:00,444 INFO L226 Difference]: Without dead ends: 200 [2022-01-18 14:30:00,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:30:00,444 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:00,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 25 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:00,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-18 14:30:00,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 158. [2022-01-18 14:30:00,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.6751592356687897) internal successors, (420), 157 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:00,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 420 transitions. [2022-01-18 14:30:00,450 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 420 transitions. Word has length 15 [2022-01-18 14:30:00,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:00,450 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 420 transitions. [2022-01-18 14:30:00,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2022-01-18 14:30:00,450 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 420 transitions. [2022-01-18 14:30:00,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:30:00,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:00,451 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:00,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:00,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:00,668 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:00,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:00,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1207156740, now seen corresponding path program 27 times [2022-01-18 14:30:00,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:00,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817546859] [2022-01-18 14:30:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:00,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:00,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:00,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817546859] [2022-01-18 14:30:00,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817546859] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:00,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736527591] [2022-01-18 14:30:00,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:30:00,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:00,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:00,708 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) [2022-01-18 14:30:00,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 14:30:00,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:30:00,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:00,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:30:00,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:00,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:30:00,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-01-18 14:30:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:00,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:01,077 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-01-18 14:30:01,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-01-18 14:30:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:04,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736527591] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:04,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:04,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 14 [2022-01-18 14:30:04,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750369777] [2022-01-18 14:30:04,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:04,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:30:04,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:04,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:30:04,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:30:04,211 INFO L87 Difference]: Start difference. First operand 158 states and 420 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:04,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:04,317 INFO L93 Difference]: Finished difference Result 208 states and 523 transitions. [2022-01-18 14:30:04,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:30:04,317 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 15 [2022-01-18 14:30:04,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:04,318 INFO L225 Difference]: With dead ends: 208 [2022-01-18 14:30:04,318 INFO L226 Difference]: Without dead ends: 205 [2022-01-18 14:30:04,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:30:04,319 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:04,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 16 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:04,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-18 14:30:04,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 176. [2022-01-18 14:30:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.7142857142857144) internal successors, (475), 175 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:04,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 475 transitions. [2022-01-18 14:30:04,324 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 475 transitions. Word has length 15 [2022-01-18 14:30:04,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:04,324 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 475 transitions. [2022-01-18 14:30:04,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:04,324 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 475 transitions. [2022-01-18 14:30:04,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:30:04,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:04,325 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:04,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:04,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:04,546 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:04,547 INFO L85 PathProgramCache]: Analyzing trace with hash -676565168, now seen corresponding path program 28 times [2022-01-18 14:30:04,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:04,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452191614] [2022-01-18 14:30:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:04,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:04,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:04,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452191614] [2022-01-18 14:30:04,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452191614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:04,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133688914] [2022-01-18 14:30:04,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:30:04,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:04,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:04,585 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) [2022-01-18 14:30:04,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:30:04,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:04,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 14:30:04,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:30:04,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:04,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:30:04,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-01-18 14:30:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:04,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:05,015 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-01-18 14:30:05,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-01-18 14:30:08,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:08,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133688914] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:08,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:08,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 13 [2022-01-18 14:30:08,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730268375] [2022-01-18 14:30:08,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:08,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:30:08,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:08,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:30:08,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:30:08,584 INFO L87 Difference]: Start difference. First operand 176 states and 475 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:08,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:08,711 INFO L93 Difference]: Finished difference Result 238 states and 602 transitions. [2022-01-18 14:30:08,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:30:08,711 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 15 [2022-01-18 14:30:08,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:08,712 INFO L225 Difference]: With dead ends: 238 [2022-01-18 14:30:08,712 INFO L226 Difference]: Without dead ends: 235 [2022-01-18 14:30:08,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:30:08,713 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:08,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 30 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:08,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-01-18 14:30:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 201. [2022-01-18 14:30:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.76) internal successors, (552), 200 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:08,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 552 transitions. [2022-01-18 14:30:08,719 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 552 transitions. Word has length 15 [2022-01-18 14:30:08,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:08,719 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 552 transitions. [2022-01-18 14:30:08,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:08,719 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 552 transitions. [2022-01-18 14:30:08,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:08,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:08,720 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:08,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:08,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:08,935 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:08,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:08,936 INFO L85 PathProgramCache]: Analyzing trace with hash -613694781, now seen corresponding path program 29 times [2022-01-18 14:30:08,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:08,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380352396] [2022-01-18 14:30:08,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:08,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:08,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:08,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380352396] [2022-01-18 14:30:08,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380352396] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:08,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413167613] [2022-01-18 14:30:08,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:30:08,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:08,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:08,987 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) [2022-01-18 14:30:09,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 14:30:09,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:30:09,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:09,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:09,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:09,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:09,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413167613] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:09,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:09,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 14:30:09,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800855029] [2022-01-18 14:30:09,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:09,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:30:09,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:09,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:30:09,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:30:09,136 INFO L87 Difference]: Start difference. First operand 201 states and 552 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:09,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:09,291 INFO L93 Difference]: Finished difference Result 299 states and 704 transitions. [2022-01-18 14:30:09,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:30:09,291 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 16 [2022-01-18 14:30:09,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:09,293 INFO L225 Difference]: With dead ends: 299 [2022-01-18 14:30:09,293 INFO L226 Difference]: Without dead ends: 292 [2022-01-18 14:30:09,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:30:09,293 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 127 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:09,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 21 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:09,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-18 14:30:09,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 210. [2022-01-18 14:30:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.77511961722488) internal successors, (580), 209 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:09,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 580 transitions. [2022-01-18 14:30:09,300 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 580 transitions. Word has length 16 [2022-01-18 14:30:09,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:09,300 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 580 transitions. [2022-01-18 14:30:09,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:09,300 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 580 transitions. [2022-01-18 14:30:09,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:09,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:09,301 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:09,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 14:30:09,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-18 14:30:09,515 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:09,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:09,516 INFO L85 PathProgramCache]: Analyzing trace with hash 859673787, now seen corresponding path program 30 times [2022-01-18 14:30:09,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:09,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847181387] [2022-01-18 14:30:09,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:09,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:09,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:09,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847181387] [2022-01-18 14:30:09,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847181387] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:09,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567533573] [2022-01-18 14:30:09,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:30:09,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:09,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:09,562 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) [2022-01-18 14:30:09,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 14:30:09,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:30:09,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:09,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:09,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:09,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:09,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567533573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:09,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:09,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:30:09,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830638924] [2022-01-18 14:30:09,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:09,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:30:09,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:09,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:30:09,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:30:09,694 INFO L87 Difference]: Start difference. First operand 210 states and 580 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) [2022-01-18 14:30:09,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:09,766 INFO L93 Difference]: Finished difference Result 299 states and 707 transitions. [2022-01-18 14:30:09,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:30:09,767 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 16 [2022-01-18 14:30:09,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:09,768 INFO L225 Difference]: With dead ends: 299 [2022-01-18 14:30:09,768 INFO L226 Difference]: Without dead ends: 299 [2022-01-18 14:30:09,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:30:09,769 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 87 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:09,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 25 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:09,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-18 14:30:09,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 211. [2022-01-18 14:30:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.776190476190476) internal successors, (583), 210 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:09,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 583 transitions. [2022-01-18 14:30:09,775 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 583 transitions. Word has length 16 [2022-01-18 14:30:09,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:09,775 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 583 transitions. [2022-01-18 14:30:09,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) [2022-01-18 14:30:09,775 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 583 transitions. [2022-01-18 14:30:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:09,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:09,776 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:09,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:09,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:09,976 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:09,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:09,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1981644577, now seen corresponding path program 31 times [2022-01-18 14:30:09,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:09,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941760574] [2022-01-18 14:30:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:09,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:10,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:10,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941760574] [2022-01-18 14:30:10,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941760574] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:10,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351755165] [2022-01-18 14:30:10,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:30:10,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:10,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:10,018 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) [2022-01-18 14:30:10,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 14:30:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:10,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:10,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:10,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:10,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351755165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:10,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:10,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:30:10,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770147398] [2022-01-18 14:30:10,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:10,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:30:10,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:10,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:30:10,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:30:10,162 INFO L87 Difference]: Start difference. First operand 211 states and 583 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) [2022-01-18 14:30:10,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:10,346 INFO L93 Difference]: Finished difference Result 320 states and 715 transitions. [2022-01-18 14:30:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:30:10,346 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 16 [2022-01-18 14:30:10,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:10,348 INFO L225 Difference]: With dead ends: 320 [2022-01-18 14:30:10,348 INFO L226 Difference]: Without dead ends: 318 [2022-01-18 14:30:10,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=220, Invalid=380, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:30:10,348 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 125 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:10,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 27 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:10,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-01-18 14:30:10,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 211. [2022-01-18 14:30:10,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.761904761904762) internal successors, (580), 210 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:10,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 580 transitions. [2022-01-18 14:30:10,355 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 580 transitions. Word has length 16 [2022-01-18 14:30:10,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:10,355 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 580 transitions. [2022-01-18 14:30:10,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) [2022-01-18 14:30:10,355 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 580 transitions. [2022-01-18 14:30:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:10,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:10,356 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:10,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:10,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:10,567 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:10,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:10,568 INFO L85 PathProgramCache]: Analyzing trace with hash 263300871, now seen corresponding path program 32 times [2022-01-18 14:30:10,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:10,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240053146] [2022-01-18 14:30:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:10,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:10,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:10,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240053146] [2022-01-18 14:30:10,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240053146] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:10,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988558457] [2022-01-18 14:30:10,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:30:10,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:10,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:10,608 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) [2022-01-18 14:30:10,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 14:30:10,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:30:10,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:10,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:10,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:10,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:10,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988558457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:10,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:10,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:30:10,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757222856] [2022-01-18 14:30:10,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:10,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:30:10,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:10,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:30:10,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:30:10,742 INFO L87 Difference]: Start difference. First operand 211 states and 580 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) [2022-01-18 14:30:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:10,835 INFO L93 Difference]: Finished difference Result 329 states and 742 transitions. [2022-01-18 14:30:10,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:30:10,835 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 16 [2022-01-18 14:30:10,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:10,836 INFO L225 Difference]: With dead ends: 329 [2022-01-18 14:30:10,836 INFO L226 Difference]: Without dead ends: 329 [2022-01-18 14:30:10,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:30:10,837 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 85 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:10,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 37 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:10,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-01-18 14:30:10,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 213. [2022-01-18 14:30:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.7641509433962264) internal successors, (586), 212 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 586 transitions. [2022-01-18 14:30:10,843 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 586 transitions. Word has length 16 [2022-01-18 14:30:10,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:10,843 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 586 transitions. [2022-01-18 14:30:10,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) [2022-01-18 14:30:10,843 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 586 transitions. [2022-01-18 14:30:10,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:10,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:10,844 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:10,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:11,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 14:30:11,065 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:11,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:11,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1973914179, now seen corresponding path program 33 times [2022-01-18 14:30:11,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:11,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79092819] [2022-01-18 14:30:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:11,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:11,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:11,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79092819] [2022-01-18 14:30:11,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79092819] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:11,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584147508] [2022-01-18 14:30:11,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:30:11,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:11,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:11,106 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) [2022-01-18 14:30:11,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 14:30:11,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:30:11,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:11,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:11,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:11,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:11,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584147508] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:11,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:11,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 14:30:11,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324541906] [2022-01-18 14:30:11,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:11,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:30:11,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:11,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:30:11,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:30:11,232 INFO L87 Difference]: Start difference. First operand 213 states and 586 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:11,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:11,343 INFO L93 Difference]: Finished difference Result 356 states and 803 transitions. [2022-01-18 14:30:11,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:30:11,343 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 16 [2022-01-18 14:30:11,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:11,345 INFO L225 Difference]: With dead ends: 356 [2022-01-18 14:30:11,345 INFO L226 Difference]: Without dead ends: 356 [2022-01-18 14:30:11,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=233, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:30:11,345 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 93 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:11,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 29 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:11,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-01-18 14:30:11,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 199. [2022-01-18 14:30:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.7222222222222223) internal successors, (539), 198 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:11,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 539 transitions. [2022-01-18 14:30:11,351 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 539 transitions. Word has length 16 [2022-01-18 14:30:11,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:11,351 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 539 transitions. [2022-01-18 14:30:11,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:11,352 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 539 transitions. [2022-01-18 14:30:11,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:11,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:11,352 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:11,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:11,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 14:30:11,573 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:11,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:11,574 INFO L85 PathProgramCache]: Analyzing trace with hash 673953365, now seen corresponding path program 34 times [2022-01-18 14:30:11,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:11,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642277161] [2022-01-18 14:30:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:11,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:11,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:11,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642277161] [2022-01-18 14:30:11,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642277161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:11,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869713619] [2022-01-18 14:30:11,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:30:11,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:11,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:11,616 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) [2022-01-18 14:30:11,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 14:30:11,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:30:11,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:11,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:11,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:11,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:11,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869713619] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:11,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:11,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:30:11,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97425842] [2022-01-18 14:30:11,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:11,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:30:11,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:11,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:30:11,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:30:11,734 INFO L87 Difference]: Start difference. First operand 199 states and 539 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) [2022-01-18 14:30:11,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:11,885 INFO L93 Difference]: Finished difference Result 319 states and 717 transitions. [2022-01-18 14:30:11,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:30:11,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 16 [2022-01-18 14:30:11,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:11,887 INFO L225 Difference]: With dead ends: 319 [2022-01-18 14:30:11,887 INFO L226 Difference]: Without dead ends: 317 [2022-01-18 14:30:11,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:30:11,888 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 123 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:11,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 25 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:11,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-18 14:30:11,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 212. [2022-01-18 14:30:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.744075829383886) internal successors, (579), 211 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:11,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 579 transitions. [2022-01-18 14:30:11,894 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 579 transitions. Word has length 16 [2022-01-18 14:30:11,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:11,894 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 579 transitions. [2022-01-18 14:30:11,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) [2022-01-18 14:30:11,894 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 579 transitions. [2022-01-18 14:30:11,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:11,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:11,895 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:11,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:12,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 14:30:12,116 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:12,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:12,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1044390341, now seen corresponding path program 35 times [2022-01-18 14:30:12,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:12,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043447292] [2022-01-18 14:30:12,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:12,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:12,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043447292] [2022-01-18 14:30:12,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043447292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821185274] [2022-01-18 14:30:12,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:30:12,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:12,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:12,161 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:12,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 14:30:12,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:30:12,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:12,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:12,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:12,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:12,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821185274] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:12,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:12,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:30:12,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752444324] [2022-01-18 14:30:12,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:12,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:30:12,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:12,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:30:12,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:30:12,295 INFO L87 Difference]: Start difference. First operand 212 states and 579 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) [2022-01-18 14:30:12,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:12,415 INFO L93 Difference]: Finished difference Result 302 states and 687 transitions. [2022-01-18 14:30:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:30:12,415 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 16 [2022-01-18 14:30:12,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:12,416 INFO L225 Difference]: With dead ends: 302 [2022-01-18 14:30:12,417 INFO L226 Difference]: Without dead ends: 302 [2022-01-18 14:30:12,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:30:12,417 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 106 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:12,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 23 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:12,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-18 14:30:12,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 208. [2022-01-18 14:30:12,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.7246376811594204) internal successors, (564), 207 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:12,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 564 transitions. [2022-01-18 14:30:12,423 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 564 transitions. Word has length 16 [2022-01-18 14:30:12,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:12,423 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 564 transitions. [2022-01-18 14:30:12,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) [2022-01-18 14:30:12,423 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 564 transitions. [2022-01-18 14:30:12,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:12,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:12,424 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:12,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:12,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 14:30:12,625 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:12,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:12,625 INFO L85 PathProgramCache]: Analyzing trace with hash 666222967, now seen corresponding path program 36 times [2022-01-18 14:30:12,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:12,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345094102] [2022-01-18 14:30:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:12,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:12,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:12,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345094102] [2022-01-18 14:30:12,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345094102] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:12,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892440373] [2022-01-18 14:30:12,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:30:12,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:12,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:12,667 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:12,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 14:30:12,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:30:12,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:12,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:12,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:12,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:12,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892440373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:12,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:12,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-01-18 14:30:12,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311539913] [2022-01-18 14:30:12,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:12,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:30:12,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:12,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:30:12,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:30:12,805 INFO L87 Difference]: Start difference. First operand 208 states and 564 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:12,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:12,955 INFO L93 Difference]: Finished difference Result 362 states and 774 transitions. [2022-01-18 14:30:12,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:30:12,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 16 [2022-01-18 14:30:12,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:12,956 INFO L225 Difference]: With dead ends: 362 [2022-01-18 14:30:12,956 INFO L226 Difference]: Without dead ends: 362 [2022-01-18 14:30:12,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:30:12,957 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 136 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:12,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 47 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:12,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-18 14:30:12,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 188. [2022-01-18 14:30:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.6684491978609626) internal successors, (499), 187 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 499 transitions. [2022-01-18 14:30:12,962 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 499 transitions. Word has length 16 [2022-01-18 14:30:12,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:12,962 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 499 transitions. [2022-01-18 14:30:12,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:12,962 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 499 transitions. [2022-01-18 14:30:12,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:12,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:12,964 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:12,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:13,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 14:30:13,175 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:13,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:13,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2139339333, now seen corresponding path program 37 times [2022-01-18 14:30:13,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:13,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934972556] [2022-01-18 14:30:13,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:13,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:13,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:13,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934972556] [2022-01-18 14:30:13,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934972556] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:13,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834380811] [2022-01-18 14:30:13,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:30:13,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:13,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:13,226 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:13,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 14:30:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:13,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:13,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:13,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:13,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:13,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834380811] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:13,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:13,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-01-18 14:30:13,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304935220] [2022-01-18 14:30:13,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:13,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:30:13,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:13,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:30:13,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:30:13,351 INFO L87 Difference]: Start difference. First operand 188 states and 499 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:13,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:13,444 INFO L93 Difference]: Finished difference Result 348 states and 834 transitions. [2022-01-18 14:30:13,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:30:13,444 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 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 16 [2022-01-18 14:30:13,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:13,445 INFO L225 Difference]: With dead ends: 348 [2022-01-18 14:30:13,445 INFO L226 Difference]: Without dead ends: 348 [2022-01-18 14:30:13,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:30:13,445 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 75 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:13,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 33 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:13,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-18 14:30:13,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 239. [2022-01-18 14:30:13,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.7815126050420167) internal successors, (662), 238 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:13,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 662 transitions. [2022-01-18 14:30:13,451 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 662 transitions. Word has length 16 [2022-01-18 14:30:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:13,451 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 662 transitions. [2022-01-18 14:30:13,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:13,452 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 662 transitions. [2022-01-18 14:30:13,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:13,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:13,452 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:13,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 14:30:13,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-01-18 14:30:13,663 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:13,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:13,664 INFO L85 PathProgramCache]: Analyzing trace with hash -991132413, now seen corresponding path program 38 times [2022-01-18 14:30:13,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:13,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391142080] [2022-01-18 14:30:13,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:13,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:13,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:13,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:13,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391142080] [2022-01-18 14:30:13,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391142080] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:13,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372140212] [2022-01-18 14:30:13,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:30:13,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:13,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:13,702 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:13,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 14:30:13,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:30:13,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:13,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:13,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:13,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:13,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372140212] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:13,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:13,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-01-18 14:30:13,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125519012] [2022-01-18 14:30:13,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:13,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:30:13,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:13,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:30:13,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:30:13,824 INFO L87 Difference]: Start difference. First operand 239 states and 662 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:13,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:13,993 INFO L93 Difference]: Finished difference Result 344 states and 840 transitions. [2022-01-18 14:30:13,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:30:13,993 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 16 [2022-01-18 14:30:13,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:13,994 INFO L225 Difference]: With dead ends: 344 [2022-01-18 14:30:13,994 INFO L226 Difference]: Without dead ends: 340 [2022-01-18 14:30:13,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:30:13,995 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 99 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:13,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 21 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-01-18 14:30:14,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 265. [2022-01-18 14:30:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.8257575757575757) internal successors, (746), 264 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:14,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 746 transitions. [2022-01-18 14:30:14,001 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 746 transitions. Word has length 16 [2022-01-18 14:30:14,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:14,001 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 746 transitions. [2022-01-18 14:30:14,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:14,001 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 746 transitions. [2022-01-18 14:30:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:14,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:14,002 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:14,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 14:30:14,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 14:30:14,215 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:14,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:14,216 INFO L85 PathProgramCache]: Analyzing trace with hash -822185533, now seen corresponding path program 39 times [2022-01-18 14:30:14,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:14,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682984463] [2022-01-18 14:30:14,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:14,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:14,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:14,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682984463] [2022-01-18 14:30:14,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682984463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:14,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706751235] [2022-01-18 14:30:14,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:30:14,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:14,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:14,258 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:14,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 14:30:14,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:30:14,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:14,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:14,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:14,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:14,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706751235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:14,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:14,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-01-18 14:30:14,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526937060] [2022-01-18 14:30:14,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:14,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:30:14,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:14,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:30:14,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:30:14,375 INFO L87 Difference]: Start difference. First operand 265 states and 746 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:14,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:14,501 INFO L93 Difference]: Finished difference Result 418 states and 1002 transitions. [2022-01-18 14:30:14,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:30:14,501 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 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 16 [2022-01-18 14:30:14,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:14,503 INFO L225 Difference]: With dead ends: 418 [2022-01-18 14:30:14,503 INFO L226 Difference]: Without dead ends: 418 [2022-01-18 14:30:14,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:30:14,503 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 81 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:14,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 25 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:14,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-18 14:30:14,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 215. [2022-01-18 14:30:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.7570093457943927) internal successors, (590), 214 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:14,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 590 transitions. [2022-01-18 14:30:14,509 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 590 transitions. Word has length 16 [2022-01-18 14:30:14,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:14,509 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 590 transitions. [2022-01-18 14:30:14,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:14,509 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 590 transitions. [2022-01-18 14:30:14,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:14,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:14,510 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:14,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-18 14:30:14,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-01-18 14:30:14,723 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:14,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1209768543, now seen corresponding path program 40 times [2022-01-18 14:30:14,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:14,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406373589] [2022-01-18 14:30:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:14,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:14,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:14,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406373589] [2022-01-18 14:30:14,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406373589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:14,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434613140] [2022-01-18 14:30:14,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:30:14,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:14,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:14,775 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:14,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 14:30:14,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:30:14,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:14,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:14,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:14,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:14,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434613140] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:14,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:14,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:30:14,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522275318] [2022-01-18 14:30:14,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:14,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:30:14,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:14,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:30:14,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:30:14,890 INFO L87 Difference]: Start difference. First operand 215 states and 590 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) [2022-01-18 14:30:15,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:15,048 INFO L93 Difference]: Finished difference Result 327 states and 744 transitions. [2022-01-18 14:30:15,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:30:15,048 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 16 [2022-01-18 14:30:15,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:15,049 INFO L225 Difference]: With dead ends: 327 [2022-01-18 14:30:15,049 INFO L226 Difference]: Without dead ends: 323 [2022-01-18 14:30:15,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:30:15,050 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 100 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:15,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 35 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-01-18 14:30:15,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 227. [2022-01-18 14:30:15,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.774336283185841) internal successors, (627), 226 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:15,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 627 transitions. [2022-01-18 14:30:15,055 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 627 transitions. Word has length 16 [2022-01-18 14:30:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:15,055 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 627 transitions. [2022-01-18 14:30:15,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) [2022-01-18 14:30:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 627 transitions. [2022-01-18 14:30:15,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:15,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:15,056 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:15,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 14:30:15,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:15,263 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:15,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:15,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1366855047, now seen corresponding path program 41 times [2022-01-18 14:30:15,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:15,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311595024] [2022-01-18 14:30:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:15,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:15,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:15,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311595024] [2022-01-18 14:30:15,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311595024] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:15,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465432168] [2022-01-18 14:30:15,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:30:15,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:15,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:15,300 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:15,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 14:30:15,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:30:15,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:15,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:15,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:15,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:15,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465432168] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:15,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:15,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:30:15,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433327613] [2022-01-18 14:30:15,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:15,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:30:15,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:15,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:30:15,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:30:15,424 INFO L87 Difference]: Start difference. First operand 227 states and 627 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) [2022-01-18 14:30:15,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:15,534 INFO L93 Difference]: Finished difference Result 329 states and 768 transitions. [2022-01-18 14:30:15,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:30:15,538 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 16 [2022-01-18 14:30:15,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:15,539 INFO L225 Difference]: With dead ends: 329 [2022-01-18 14:30:15,539 INFO L226 Difference]: Without dead ends: 329 [2022-01-18 14:30:15,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:30:15,539 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 88 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:15,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 35 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-01-18 14:30:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 228. [2022-01-18 14:30:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.7753303964757707) internal successors, (630), 227 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 630 transitions. [2022-01-18 14:30:15,545 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 630 transitions. Word has length 16 [2022-01-18 14:30:15,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:15,545 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 630 transitions. [2022-01-18 14:30:15,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) [2022-01-18 14:30:15,545 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 630 transitions. [2022-01-18 14:30:15,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:15,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:15,546 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:15,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:15,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:15,763 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:15,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:15,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1217498941, now seen corresponding path program 42 times [2022-01-18 14:30:15,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:15,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029589689] [2022-01-18 14:30:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:15,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:15,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:15,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029589689] [2022-01-18 14:30:15,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029589689] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:15,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865205277] [2022-01-18 14:30:15,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:30:15,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:15,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:15,803 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:15,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 14:30:15,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:30:15,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:15,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:15,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:15,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:15,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865205277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:15,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:15,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 14:30:15,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933489992] [2022-01-18 14:30:15,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:15,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:30:15,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:15,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:30:15,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:30:15,932 INFO L87 Difference]: Start difference. First operand 228 states and 630 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:16,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:16,046 INFO L93 Difference]: Finished difference Result 306 states and 716 transitions. [2022-01-18 14:30:16,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:30:16,046 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 16 [2022-01-18 14:30:16,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:16,047 INFO L225 Difference]: With dead ends: 306 [2022-01-18 14:30:16,047 INFO L226 Difference]: Without dead ends: 306 [2022-01-18 14:30:16,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:30:16,048 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 92 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:16,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 35 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:16,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-01-18 14:30:16,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 219. [2022-01-18 14:30:16,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.743119266055046) internal successors, (598), 218 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 598 transitions. [2022-01-18 14:30:16,052 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 598 transitions. Word has length 16 [2022-01-18 14:30:16,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:16,053 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 598 transitions. [2022-01-18 14:30:16,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:16,053 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 598 transitions. [2022-01-18 14:30:16,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:16,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:16,054 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:16,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:16,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 14:30:16,267 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:16,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:16,268 INFO L85 PathProgramCache]: Analyzing trace with hash 271906055, now seen corresponding path program 43 times [2022-01-18 14:30:16,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:16,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442819608] [2022-01-18 14:30:16,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:16,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:16,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:16,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442819608] [2022-01-18 14:30:16,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442819608] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:16,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169018714] [2022-01-18 14:30:16,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:30:16,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:16,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:16,312 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:16,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 14:30:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:16,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:16,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:16,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:16,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169018714] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:16,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:16,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 14:30:16,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114364290] [2022-01-18 14:30:16,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:16,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:30:16,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:16,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:30:16,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:30:16,427 INFO L87 Difference]: Start difference. First operand 219 states and 598 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:16,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:16,574 INFO L93 Difference]: Finished difference Result 352 states and 786 transitions. [2022-01-18 14:30:16,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:30:16,574 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 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 16 [2022-01-18 14:30:16,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:16,575 INFO L225 Difference]: With dead ends: 352 [2022-01-18 14:30:16,575 INFO L226 Difference]: Without dead ends: 352 [2022-01-18 14:30:16,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=207, Invalid=393, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:30:16,576 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 72 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:16,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 63 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-01-18 14:30:16,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 199. [2022-01-18 14:30:16,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.702020202020202) internal successors, (535), 198 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 535 transitions. [2022-01-18 14:30:16,581 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 535 transitions. Word has length 16 [2022-01-18 14:30:16,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:16,581 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 535 transitions. [2022-01-18 14:30:16,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:16,581 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 535 transitions. [2022-01-18 14:30:16,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:16,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:16,582 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:16,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:16,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 14:30:16,795 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:16,796 INFO L85 PathProgramCache]: Analyzing trace with hash -801179325, now seen corresponding path program 44 times [2022-01-18 14:30:16,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:16,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89658304] [2022-01-18 14:30:16,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:16,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:16,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:16,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89658304] [2022-01-18 14:30:16,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89658304] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:16,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244434775] [2022-01-18 14:30:16,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:30:16,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:16,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:16,847 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:16,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 14:30:16,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:30:16,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:16,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:16,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:16,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:16,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244434775] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:16,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:16,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 14:30:16,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151167146] [2022-01-18 14:30:16,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:16,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:30:16,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:16,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:30:16,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:30:16,974 INFO L87 Difference]: Start difference. First operand 199 states and 535 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:17,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:17,127 INFO L93 Difference]: Finished difference Result 379 states and 925 transitions. [2022-01-18 14:30:17,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 14:30:17,128 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 16 [2022-01-18 14:30:17,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:17,129 INFO L225 Difference]: With dead ends: 379 [2022-01-18 14:30:17,129 INFO L226 Difference]: Without dead ends: 379 [2022-01-18 14:30:17,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:30:17,129 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 49 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:17,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 31 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:17,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-01-18 14:30:17,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 266. [2022-01-18 14:30:17,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.781132075471698) internal successors, (737), 265 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:17,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 737 transitions. [2022-01-18 14:30:17,135 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 737 transitions. Word has length 16 [2022-01-18 14:30:17,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:17,135 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 737 transitions. [2022-01-18 14:30:17,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:17,136 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 737 transitions. [2022-01-18 14:30:17,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:17,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:17,136 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:17,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-18 14:30:17,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-18 14:30:17,357 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:17,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:17,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1185929723, now seen corresponding path program 45 times [2022-01-18 14:30:17,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:17,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550988407] [2022-01-18 14:30:17,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:17,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:17,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:17,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550988407] [2022-01-18 14:30:17,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550988407] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:17,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208819670] [2022-01-18 14:30:17,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:30:17,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:17,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:17,412 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:17,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 14:30:17,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:30:17,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:17,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:17,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:17,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:17,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208819670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:17,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:17,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-01-18 14:30:17,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361676987] [2022-01-18 14:30:17,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:17,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:30:17,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:17,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:30:17,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:30:17,579 INFO L87 Difference]: Start difference. First operand 266 states and 737 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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) [2022-01-18 14:30:17,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:17,767 INFO L93 Difference]: Finished difference Result 356 states and 844 transitions. [2022-01-18 14:30:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 14:30:17,767 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 16 [2022-01-18 14:30:17,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:17,768 INFO L225 Difference]: With dead ends: 356 [2022-01-18 14:30:17,769 INFO L226 Difference]: Without dead ends: 350 [2022-01-18 14:30:17,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:30:17,769 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 88 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:17,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 35 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:17,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-18 14:30:17,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 246. [2022-01-18 14:30:17,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.7714285714285714) internal successors, (679), 245 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:17,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 679 transitions. [2022-01-18 14:30:17,775 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 679 transitions. Word has length 16 [2022-01-18 14:30:17,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:17,775 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 679 transitions. [2022-01-18 14:30:17,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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) [2022-01-18 14:30:17,775 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 679 transitions. [2022-01-18 14:30:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:17,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:17,776 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:17,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:17,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:17,991 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:17,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:17,992 INFO L85 PathProgramCache]: Analyzing trace with hash 524394453, now seen corresponding path program 46 times [2022-01-18 14:30:17,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:17,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540003971] [2022-01-18 14:30:17,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:17,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:18,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:18,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540003971] [2022-01-18 14:30:18,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540003971] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:18,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995750221] [2022-01-18 14:30:18,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:30:18,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:18,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:18,031 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:18,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 14:30:18,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:30:18,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:18,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:18,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:18,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:18,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995750221] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:18,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:18,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:30:18,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223561931] [2022-01-18 14:30:18,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:18,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:30:18,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:18,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:30:18,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:30:18,145 INFO L87 Difference]: Start difference. First operand 246 states and 679 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:18,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:18,284 INFO L93 Difference]: Finished difference Result 341 states and 854 transitions. [2022-01-18 14:30:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:30:18,285 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 16 [2022-01-18 14:30:18,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:18,286 INFO L225 Difference]: With dead ends: 341 [2022-01-18 14:30:18,286 INFO L226 Difference]: Without dead ends: 339 [2022-01-18 14:30:18,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:30:18,287 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 74 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:18,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 21 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:18,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-01-18 14:30:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 282. [2022-01-18 14:30:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.8185053380782916) internal successors, (792), 281 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:18,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 792 transitions. [2022-01-18 14:30:18,293 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 792 transitions. Word has length 16 [2022-01-18 14:30:18,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:18,293 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 792 transitions. [2022-01-18 14:30:18,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:18,293 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 792 transitions. [2022-01-18 14:30:18,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:18,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:18,294 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:18,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:18,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 14:30:18,514 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:18,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:18,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1193949253, now seen corresponding path program 47 times [2022-01-18 14:30:18,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:18,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100457334] [2022-01-18 14:30:18,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:18,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:18,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:18,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100457334] [2022-01-18 14:30:18,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100457334] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:18,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948181041] [2022-01-18 14:30:18,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:30:18,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:18,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:18,555 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:18,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 14:30:18,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:30:18,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:18,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:18,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:18,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:18,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948181041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:18,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:18,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:30:18,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760717189] [2022-01-18 14:30:18,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:18,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:30:18,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:18,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:30:18,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:30:18,720 INFO L87 Difference]: Start difference. First operand 282 states and 792 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:18,829 INFO L93 Difference]: Finished difference Result 350 states and 889 transitions. [2022-01-18 14:30:18,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:30:18,829 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 16 [2022-01-18 14:30:18,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:18,831 INFO L225 Difference]: With dead ends: 350 [2022-01-18 14:30:18,831 INFO L226 Difference]: Without dead ends: 350 [2022-01-18 14:30:18,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:30:18,832 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:18,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 19 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:18,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-18 14:30:18,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 282. [2022-01-18 14:30:18,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.8185053380782916) internal successors, (792), 281 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:18,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 792 transitions. [2022-01-18 14:30:18,838 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 792 transitions. Word has length 16 [2022-01-18 14:30:18,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:18,838 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 792 transitions. [2022-01-18 14:30:18,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:18,838 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 792 transitions. [2022-01-18 14:30:18,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:18,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:18,839 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:18,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:19,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:19,055 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:19,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:19,055 INFO L85 PathProgramCache]: Analyzing trace with hash 516664055, now seen corresponding path program 48 times [2022-01-18 14:30:19,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:19,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652074084] [2022-01-18 14:30:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:19,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:19,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:19,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652074084] [2022-01-18 14:30:19,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652074084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:19,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395929184] [2022-01-18 14:30:19,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:30:19,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:19,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:19,092 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:19,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 14:30:19,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:30:19,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:19,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:19,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:19,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:19,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395929184] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:19,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:19,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 14:30:19,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344191738] [2022-01-18 14:30:19,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:19,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:30:19,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:19,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:30:19,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:30:19,214 INFO L87 Difference]: Start difference. First operand 282 states and 792 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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) [2022-01-18 14:30:19,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:19,346 INFO L93 Difference]: Finished difference Result 357 states and 904 transitions. [2022-01-18 14:30:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:30:19,346 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 16 [2022-01-18 14:30:19,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:19,347 INFO L225 Difference]: With dead ends: 357 [2022-01-18 14:30:19,347 INFO L226 Difference]: Without dead ends: 357 [2022-01-18 14:30:19,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:30:19,348 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 68 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:19,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 19 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:19,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-01-18 14:30:19,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 278. [2022-01-18 14:30:19,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.808664259927798) internal successors, (778), 277 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 778 transitions. [2022-01-18 14:30:19,353 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 778 transitions. Word has length 16 [2022-01-18 14:30:19,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:19,353 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 778 transitions. [2022-01-18 14:30:19,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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) [2022-01-18 14:30:19,353 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 778 transitions. [2022-01-18 14:30:19,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:19,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:19,354 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:19,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:19,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 14:30:19,567 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:19,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:19,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2006069051, now seen corresponding path program 49 times [2022-01-18 14:30:19,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:19,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40477362] [2022-01-18 14:30:19,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:19,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:19,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:19,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40477362] [2022-01-18 14:30:19,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40477362] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:19,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935507073] [2022-01-18 14:30:19,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:30:19,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:19,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:19,614 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:19,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 14:30:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:19,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:19,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:19,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:19,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935507073] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:19,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:19,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 14:30:19,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987393467] [2022-01-18 14:30:19,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:19,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:30:19,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:19,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:30:19,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:30:19,741 INFO L87 Difference]: Start difference. First operand 278 states and 778 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:19,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:19,799 INFO L93 Difference]: Finished difference Result 388 states and 1041 transitions. [2022-01-18 14:30:19,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:30:19,799 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 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 16 [2022-01-18 14:30:19,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:19,800 INFO L225 Difference]: With dead ends: 388 [2022-01-18 14:30:19,800 INFO L226 Difference]: Without dead ends: 388 [2022-01-18 14:30:19,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:30:19,801 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:19,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 17 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:30:19,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-01-18 14:30:19,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 347. [2022-01-18 14:30:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.852601156069364) internal successors, (987), 346 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 987 transitions. [2022-01-18 14:30:19,807 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 987 transitions. Word has length 16 [2022-01-18 14:30:19,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:19,807 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 987 transitions. [2022-01-18 14:30:19,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:19,807 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 987 transitions. [2022-01-18 14:30:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:19,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:19,808 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:19,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:20,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-01-18 14:30:20,023 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:20,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:20,024 INFO L85 PathProgramCache]: Analyzing trace with hash 932983671, now seen corresponding path program 50 times [2022-01-18 14:30:20,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:20,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010467746] [2022-01-18 14:30:20,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:20,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:20,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:20,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010467746] [2022-01-18 14:30:20,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010467746] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:20,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213221227] [2022-01-18 14:30:20,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:30:20,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:20,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:20,071 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:20,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 14:30:20,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:30:20,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:20,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:20,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:20,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:20,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213221227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:20,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:20,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 14:30:20,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925099185] [2022-01-18 14:30:20,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:20,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:30:20,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:20,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:30:20,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:30:20,181 INFO L87 Difference]: Start difference. First operand 347 states and 987 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:20,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:20,295 INFO L93 Difference]: Finished difference Result 423 states and 1116 transitions. [2022-01-18 14:30:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:30:20,295 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 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 16 [2022-01-18 14:30:20,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:20,296 INFO L225 Difference]: With dead ends: 423 [2022-01-18 14:30:20,296 INFO L226 Difference]: Without dead ends: 423 [2022-01-18 14:30:20,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:30:20,297 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 26 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:20,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 23 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:20,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-01-18 14:30:20,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 354. [2022-01-18 14:30:20,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.855524079320113) internal successors, (1008), 353 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:20,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1008 transitions. [2022-01-18 14:30:20,304 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1008 transitions. Word has length 16 [2022-01-18 14:30:20,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:20,304 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 1008 transitions. [2022-01-18 14:30:20,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:20,304 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1008 transitions. [2022-01-18 14:30:20,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:30:20,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:20,305 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:20,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:20,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:20,523 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:20,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:20,523 INFO L85 PathProgramCache]: Analyzing trace with hash 2027075259, now seen corresponding path program 51 times [2022-01-18 14:30:20,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:20,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276910836] [2022-01-18 14:30:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:20,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:20,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:20,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276910836] [2022-01-18 14:30:20,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276910836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:20,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004310065] [2022-01-18 14:30:20,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:30:20,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:20,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:20,570 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:20,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 14:30:20,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:30:20,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:20,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:20,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:20,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:20,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004310065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:20,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:20,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-01-18 14:30:20,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069203800] [2022-01-18 14:30:20,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:20,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:30:20,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:20,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:30:20,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:30:20,670 INFO L87 Difference]: Start difference. First operand 354 states and 1008 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:20,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:20,813 INFO L93 Difference]: Finished difference Result 479 states and 1269 transitions. [2022-01-18 14:30:20,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:30:20,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 16 [2022-01-18 14:30:20,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:20,814 INFO L225 Difference]: With dead ends: 479 [2022-01-18 14:30:20,814 INFO L226 Difference]: Without dead ends: 479 [2022-01-18 14:30:20,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=215, Invalid=435, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:30:20,815 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:20,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 29 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-18 14:30:20,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 373. [2022-01-18 14:30:20,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.8629032258064515) internal successors, (1065), 372 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:20,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1065 transitions. [2022-01-18 14:30:20,822 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1065 transitions. Word has length 16 [2022-01-18 14:30:20,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:20,822 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 1065 transitions. [2022-01-18 14:30:20,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:20,822 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1065 transitions. [2022-01-18 14:30:20,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:30:20,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:20,823 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:20,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:21,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 14:30:21,045 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:21,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:21,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1364208962, now seen corresponding path program 52 times [2022-01-18 14:30:21,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:21,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103589383] [2022-01-18 14:30:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:21,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:21,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:21,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103589383] [2022-01-18 14:30:21,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103589383] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:21,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921657135] [2022-01-18 14:30:21,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:30:21,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:21,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:21,104 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:21,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 14:30:21,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:30:21,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:21,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 14:30:21,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:21,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:21,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921657135] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:21,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:21,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 14:30:21,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665616637] [2022-01-18 14:30:21,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:21,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 14:30:21,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:21,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 14:30:21,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:30:21,248 INFO L87 Difference]: Start difference. First operand 373 states and 1065 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:21,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:21,470 INFO L93 Difference]: Finished difference Result 553 states and 1347 transitions. [2022-01-18 14:30:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:30:21,471 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 14:30:21,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:21,472 INFO L225 Difference]: With dead ends: 553 [2022-01-18 14:30:21,472 INFO L226 Difference]: Without dead ends: 545 [2022-01-18 14:30:21,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=419, Invalid=841, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 14:30:21,473 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 142 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:21,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 59 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:21,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-01-18 14:30:21,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 385. [2022-01-18 14:30:21,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.8046875) internal successors, (1077), 384 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:21,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1077 transitions. [2022-01-18 14:30:21,480 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1077 transitions. Word has length 17 [2022-01-18 14:30:21,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:21,480 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1077 transitions. [2022-01-18 14:30:21,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:21,481 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1077 transitions. [2022-01-18 14:30:21,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:30:21,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:21,487 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:21,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 14:30:21,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 14:30:21,699 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:21,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:21,700 INFO L85 PathProgramCache]: Analyzing trace with hash -11250196, now seen corresponding path program 53 times [2022-01-18 14:30:21,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:21,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125512392] [2022-01-18 14:30:21,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:21,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:21,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:21,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125512392] [2022-01-18 14:30:21,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125512392] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:21,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447797642] [2022-01-18 14:30:21,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:30:21,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:21,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:21,755 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:21,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 14:30:21,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:30:21,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:21,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 14:30:21,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:21,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:21,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447797642] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:21,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:21,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 14:30:21,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970139933] [2022-01-18 14:30:21,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:21,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:30:21,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:21,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:30:21,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:30:21,891 INFO L87 Difference]: Start difference. First operand 385 states and 1077 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:22,056 INFO L93 Difference]: Finished difference Result 543 states and 1402 transitions. [2022-01-18 14:30:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:30:22,056 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 14:30:22,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:22,058 INFO L225 Difference]: With dead ends: 543 [2022-01-18 14:30:22,058 INFO L226 Difference]: Without dead ends: 538 [2022-01-18 14:30:22,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:30:22,058 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 72 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:22,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 33 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-18 14:30:22,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 467. [2022-01-18 14:30:22,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.757510729613734) internal successors, (1285), 466 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1285 transitions. [2022-01-18 14:30:22,066 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1285 transitions. Word has length 17 [2022-01-18 14:30:22,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:22,066 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 1285 transitions. [2022-01-18 14:30:22,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:22,066 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1285 transitions. [2022-01-18 14:30:22,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:30:22,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:22,067 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:22,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:22,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:22,283 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:22,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:22,284 INFO L85 PathProgramCache]: Analyzing trace with hash -677288464, now seen corresponding path program 54 times [2022-01-18 14:30:22,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:22,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482022972] [2022-01-18 14:30:22,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:22,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:22,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:22,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482022972] [2022-01-18 14:30:22,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482022972] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:22,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675334846] [2022-01-18 14:30:22,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:30:22,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:22,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:22,319 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:22,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 14:30:22,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:30:22,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:22,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 14:30:22,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:22,374 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:30:22,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:30:22,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675334846] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:22,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:22,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-18 14:30:22,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302011232] [2022-01-18 14:30:22,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:22,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:30:22,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:22,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:30:22,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:30:22,483 INFO L87 Difference]: Start difference. First operand 467 states and 1285 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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) [2022-01-18 14:30:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:22,566 INFO L93 Difference]: Finished difference Result 774 states and 1910 transitions. [2022-01-18 14:30:22,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:30:22,566 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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 17 [2022-01-18 14:30:22,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:22,568 INFO L225 Difference]: With dead ends: 774 [2022-01-18 14:30:22,568 INFO L226 Difference]: Without dead ends: 772 [2022-01-18 14:30:22,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:30:22,569 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 95 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:22,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 37 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:22,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-01-18 14:30:22,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 495. [2022-01-18 14:30:22,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 2.7611336032388665) internal successors, (1364), 494 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:22,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1364 transitions. [2022-01-18 14:30:22,577 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1364 transitions. Word has length 17 [2022-01-18 14:30:22,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:22,577 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1364 transitions. [2022-01-18 14:30:22,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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) [2022-01-18 14:30:22,577 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1364 transitions. [2022-01-18 14:30:22,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:30:22,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:22,578 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:22,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:22,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:22,799 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:22,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:22,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1092303980, now seen corresponding path program 55 times [2022-01-18 14:30:22,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:22,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210160571] [2022-01-18 14:30:22,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:22,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:22,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:22,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210160571] [2022-01-18 14:30:22,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210160571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:22,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935566398] [2022-01-18 14:30:22,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:30:22,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:22,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:22,840 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:22,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 14:30:22,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:22,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:30:22,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:30:22,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935566398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:22,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:22,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2022-01-18 14:30:22,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253294650] [2022-01-18 14:30:22,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:22,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:30:22,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:22,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:30:22,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:30:22,986 INFO L87 Difference]: Start difference. First operand 495 states and 1364 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:23,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:23,115 INFO L93 Difference]: Finished difference Result 642 states and 1637 transitions. [2022-01-18 14:30:23,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:30:23,115 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 14:30:23,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:23,117 INFO L225 Difference]: With dead ends: 642 [2022-01-18 14:30:23,118 INFO L226 Difference]: Without dead ends: 640 [2022-01-18 14:30:23,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:30:23,118 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 68 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:23,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 31 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:23,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-01-18 14:30:23,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 502. [2022-01-18 14:30:23,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.758483033932136) internal successors, (1382), 501 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:23,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1382 transitions. [2022-01-18 14:30:23,128 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1382 transitions. Word has length 17 [2022-01-18 14:30:23,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:23,128 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1382 transitions. [2022-01-18 14:30:23,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:23,128 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1382 transitions. [2022-01-18 14:30:23,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:30:23,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:23,129 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:23,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:23,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:23,329 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:23,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1837006478, now seen corresponding path program 56 times [2022-01-18 14:30:23,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:23,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122033673] [2022-01-18 14:30:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:23,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:23,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:23,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122033673] [2022-01-18 14:30:23,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122033673] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:23,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938196277] [2022-01-18 14:30:23,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:30:23,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:23,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:23,376 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:23,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 14:30:23,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:30:23,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:23,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:23,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:23,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:23,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938196277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:23,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:23,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2022-01-18 14:30:23,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124254423] [2022-01-18 14:30:23,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:23,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:30:23,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:30:23,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:30:23,495 INFO L87 Difference]: Start difference. First operand 502 states and 1382 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 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) [2022-01-18 14:30:23,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:23,611 INFO L93 Difference]: Finished difference Result 643 states and 1629 transitions. [2022-01-18 14:30:23,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:30:23,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 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 17 [2022-01-18 14:30:23,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:23,613 INFO L225 Difference]: With dead ends: 643 [2022-01-18 14:30:23,613 INFO L226 Difference]: Without dead ends: 640 [2022-01-18 14:30:23,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:30:23,613 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 81 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:23,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 27 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:23,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-01-18 14:30:23,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 502. [2022-01-18 14:30:23,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.7465069860279443) internal successors, (1376), 501 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1376 transitions. [2022-01-18 14:30:23,619 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1376 transitions. Word has length 17 [2022-01-18 14:30:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:23,620 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1376 transitions. [2022-01-18 14:30:23,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 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) [2022-01-18 14:30:23,620 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1376 transitions. [2022-01-18 14:30:23,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:30:23,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:23,621 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:23,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 14:30:23,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 14:30:23,824 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:23,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:23,824 INFO L85 PathProgramCache]: Analyzing trace with hash -847019860, now seen corresponding path program 57 times [2022-01-18 14:30:23,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:23,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120217262] [2022-01-18 14:30:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:23,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:23,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:23,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120217262] [2022-01-18 14:30:23,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120217262] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:23,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023587117] [2022-01-18 14:30:23,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:30:23,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:23,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:23,879 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:23,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 14:30:23,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:30:23,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:23,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 14:30:23,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:23,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:24,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023587117] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:24,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:24,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-18 14:30:24,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018493633] [2022-01-18 14:30:24,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:24,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:30:24,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:24,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:30:24,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:30:24,003 INFO L87 Difference]: Start difference. First operand 502 states and 1376 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:24,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:24,208 INFO L93 Difference]: Finished difference Result 953 states and 2367 transitions. [2022-01-18 14:30:24,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:30:24,209 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 14:30:24,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:24,211 INFO L225 Difference]: With dead ends: 953 [2022-01-18 14:30:24,211 INFO L226 Difference]: Without dead ends: 941 [2022-01-18 14:30:24,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:30:24,212 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 101 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:24,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 31 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-01-18 14:30:24,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 629. [2022-01-18 14:30:24,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.710191082802548) internal successors, (1702), 628 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:24,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1702 transitions. [2022-01-18 14:30:24,223 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1702 transitions. Word has length 17 [2022-01-18 14:30:24,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:24,223 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1702 transitions. [2022-01-18 14:30:24,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:24,223 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1702 transitions. [2022-01-18 14:30:24,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:30:24,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:24,224 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:24,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 14:30:24,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-01-18 14:30:24,438 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:24,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:24,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1468500320, now seen corresponding path program 58 times [2022-01-18 14:30:24,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:24,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623164805] [2022-01-18 14:30:24,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:24,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:24,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:24,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623164805] [2022-01-18 14:30:24,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623164805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:24,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59188711] [2022-01-18 14:30:24,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:30:24,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:24,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:24,492 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:24,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 14:30:24,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:30:24,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:24,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:24,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:24,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:24,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59188711] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:24,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:24,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2022-01-18 14:30:24,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819483420] [2022-01-18 14:30:24,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:24,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:30:24,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:24,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:30:24,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:30:24,624 INFO L87 Difference]: Start difference. First operand 629 states and 1702 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:24,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:24,728 INFO L93 Difference]: Finished difference Result 812 states and 2056 transitions. [2022-01-18 14:30:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:30:24,728 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 14:30:24,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:24,734 INFO L225 Difference]: With dead ends: 812 [2022-01-18 14:30:24,734 INFO L226 Difference]: Without dead ends: 809 [2022-01-18 14:30:24,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:30:24,742 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 122 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:24,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 25 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:24,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-01-18 14:30:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 645. [2022-01-18 14:30:24,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.7158385093167703) internal successors, (1749), 644 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:24,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1749 transitions. [2022-01-18 14:30:24,755 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1749 transitions. Word has length 17 [2022-01-18 14:30:24,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:24,755 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1749 transitions. [2022-01-18 14:30:24,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:24,755 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1749 transitions. [2022-01-18 14:30:24,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:30:24,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:24,756 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:24,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:24,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-01-18 14:30:24,978 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:24,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:24,978 INFO L85 PathProgramCache]: Analyzing trace with hash -723797822, now seen corresponding path program 59 times [2022-01-18 14:30:24,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:24,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602152272] [2022-01-18 14:30:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:24,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:25,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:25,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602152272] [2022-01-18 14:30:25,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602152272] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:25,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945732417] [2022-01-18 14:30:25,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:30:25,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:25,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:25,023 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:25,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 14:30:25,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:30:25,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:25,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:25,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:30:25,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:30:25,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945732417] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:25,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:25,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 14:30:25,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362375474] [2022-01-18 14:30:25,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:25,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:30:25,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:25,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:30:25,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:30:25,151 INFO L87 Difference]: Start difference. First operand 645 states and 1749 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 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) [2022-01-18 14:30:25,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:25,263 INFO L93 Difference]: Finished difference Result 812 states and 2047 transitions. [2022-01-18 14:30:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:30:25,264 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 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 17 [2022-01-18 14:30:25,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:25,266 INFO L225 Difference]: With dead ends: 812 [2022-01-18 14:30:25,266 INFO L226 Difference]: Without dead ends: 807 [2022-01-18 14:30:25,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:30:25,266 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 106 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:25,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 35 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:25,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-01-18 14:30:25,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 653. [2022-01-18 14:30:25,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.7116564417177913) internal successors, (1768), 652 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1768 transitions. [2022-01-18 14:30:25,283 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1768 transitions. Word has length 17 [2022-01-18 14:30:25,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:25,283 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1768 transitions. [2022-01-18 14:30:25,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 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) [2022-01-18 14:30:25,283 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1768 transitions. [2022-01-18 14:30:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:30:25,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:25,284 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:25,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-18 14:30:25,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:25,484 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:25,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:25,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1233457654, now seen corresponding path program 60 times [2022-01-18 14:30:25,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:25,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629313429] [2022-01-18 14:30:25,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:25,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:25,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:25,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629313429] [2022-01-18 14:30:25,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629313429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:25,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642361205] [2022-01-18 14:30:25,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:30:25,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:25,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:25,529 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:25,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 14:30:25,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:30:25,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:25,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:25,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:25,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:25,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642361205] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:25,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:25,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2022-01-18 14:30:25,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292380435] [2022-01-18 14:30:25,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:25,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:30:25,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:25,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:30:25,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:30:25,650 INFO L87 Difference]: Start difference. First operand 653 states and 1768 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:25,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:25,768 INFO L93 Difference]: Finished difference Result 955 states and 2374 transitions. [2022-01-18 14:30:25,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:30:25,769 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 14:30:25,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:25,772 INFO L225 Difference]: With dead ends: 955 [2022-01-18 14:30:25,772 INFO L226 Difference]: Without dead ends: 955 [2022-01-18 14:30:25,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:30:25,772 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 107 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:25,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 73 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:25,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-01-18 14:30:25,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 662. [2022-01-18 14:30:25,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 2.706505295007564) internal successors, (1789), 661 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:25,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1789 transitions. [2022-01-18 14:30:25,782 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1789 transitions. Word has length 17 [2022-01-18 14:30:25,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:25,783 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1789 transitions. [2022-01-18 14:30:25,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:25,783 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1789 transitions. [2022-01-18 14:30:25,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:30:25,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:25,784 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:25,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-18 14:30:25,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:25,984 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:25,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:25,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1018647440, now seen corresponding path program 61 times [2022-01-18 14:30:25,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:25,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368768407] [2022-01-18 14:30:25,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:25,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:25,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:26,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:26,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368768407] [2022-01-18 14:30:26,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368768407] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:26,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065077738] [2022-01-18 14:30:26,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:30:26,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:26,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:26,028 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:26,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 14:30:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:26,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 14:30:26,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:26,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:26,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065077738] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:26,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:26,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-18 14:30:26,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109981335] [2022-01-18 14:30:26,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:26,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:30:26,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:26,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:30:26,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:30:26,183 INFO L87 Difference]: Start difference. First operand 662 states and 1789 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:26,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:26,292 INFO L93 Difference]: Finished difference Result 1104 states and 2756 transitions. [2022-01-18 14:30:26,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:30:26,292 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 14:30:26,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:26,295 INFO L225 Difference]: With dead ends: 1104 [2022-01-18 14:30:26,295 INFO L226 Difference]: Without dead ends: 1104 [2022-01-18 14:30:26,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:30:26,296 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 126 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:26,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 55 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:26,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-01-18 14:30:26,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 852. [2022-01-18 14:30:26,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 2.789659224441833) internal successors, (2374), 851 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2374 transitions. [2022-01-18 14:30:26,311 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2374 transitions. Word has length 17 [2022-01-18 14:30:26,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:26,312 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 2374 transitions. [2022-01-18 14:30:26,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:26,312 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2374 transitions. [2022-01-18 14:30:26,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:30:26,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:26,313 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:26,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:26,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-18 14:30:26,513 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:26,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:26,514 INFO L85 PathProgramCache]: Analyzing trace with hash 750945004, now seen corresponding path program 62 times [2022-01-18 14:30:26,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:26,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024880483] [2022-01-18 14:30:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:26,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:26,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:26,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024880483] [2022-01-18 14:30:26,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024880483] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:26,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312750447] [2022-01-18 14:30:26,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:30:26,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:26,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:26,555 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:26,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 14:30:26,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:30:26,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:26,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:26,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:30:26,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:30:26,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312750447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:26,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:26,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2022-01-18 14:30:26,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162487642] [2022-01-18 14:30:26,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:26,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:30:26,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:26,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:30:26,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:30:26,695 INFO L87 Difference]: Start difference. First operand 852 states and 2374 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:26,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:26,814 INFO L93 Difference]: Finished difference Result 1017 states and 2674 transitions. [2022-01-18 14:30:26,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:30:26,815 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 14:30:26,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:26,817 INFO L225 Difference]: With dead ends: 1017 [2022-01-18 14:30:26,817 INFO L226 Difference]: Without dead ends: 1016 [2022-01-18 14:30:26,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:30:26,818 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 95 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:26,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 29 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:26,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-01-18 14:30:26,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 852. [2022-01-18 14:30:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 2.788484136310223) internal successors, (2373), 851 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2373 transitions. [2022-01-18 14:30:26,832 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2373 transitions. Word has length 17 [2022-01-18 14:30:26,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:26,832 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 2373 transitions. [2022-01-18 14:30:26,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:26,832 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2373 transitions. [2022-01-18 14:30:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:30:26,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:26,833 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:26,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:27,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-18 14:30:27,047 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:27,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:27,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1495647502, now seen corresponding path program 63 times [2022-01-18 14:30:27,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:27,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684787087] [2022-01-18 14:30:27,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:27,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:27,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:27,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684787087] [2022-01-18 14:30:27,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684787087] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:27,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876779750] [2022-01-18 14:30:27,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:30:27,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:27,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:27,098 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:27,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 14:30:27,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:30:27,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:27,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 14:30:27,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:27,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:27,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876779750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:27,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:27,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 14:30:27,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713775585] [2022-01-18 14:30:27,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:27,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:30:27,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:27,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:30:27,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:30:27,234 INFO L87 Difference]: Start difference. First operand 852 states and 2373 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:27,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:27,426 INFO L93 Difference]: Finished difference Result 1340 states and 3447 transitions. [2022-01-18 14:30:27,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 14:30:27,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 14:30:27,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:27,428 INFO L225 Difference]: With dead ends: 1340 [2022-01-18 14:30:27,428 INFO L226 Difference]: Without dead ends: 1335 [2022-01-18 14:30:27,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:30:27,428 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 132 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:27,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 43 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:27,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2022-01-18 14:30:27,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 941. [2022-01-18 14:30:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 2.826595744680851) internal successors, (2657), 940 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:27,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2657 transitions. [2022-01-18 14:30:27,442 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2657 transitions. Word has length 17 [2022-01-18 14:30:27,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:27,442 INFO L470 AbstractCegarLoop]: Abstraction has 941 states and 2657 transitions. [2022-01-18 14:30:27,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2657 transitions. [2022-01-18 14:30:27,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:30:27,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:27,443 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:27,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 14:30:27,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:27,643 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:27,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:27,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1506150606, now seen corresponding path program 64 times [2022-01-18 14:30:27,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:27,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802328581] [2022-01-18 14:30:27,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:27,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:27,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:27,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802328581] [2022-01-18 14:30:27,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802328581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:27,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129488217] [2022-01-18 14:30:27,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:30:27,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:27,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:27,714 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:27,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 14:30:27,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:30:27,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:27,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:27,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:27,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:27,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129488217] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:27,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:27,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-18 14:30:27,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719744630] [2022-01-18 14:30:27,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:27,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:30:27,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:27,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:30:27,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:30:27,837 INFO L87 Difference]: Start difference. First operand 941 states and 2657 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:27,944 INFO L93 Difference]: Finished difference Result 1191 states and 3147 transitions. [2022-01-18 14:30:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:30:27,944 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 14:30:27,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:27,946 INFO L225 Difference]: With dead ends: 1191 [2022-01-18 14:30:27,946 INFO L226 Difference]: Without dead ends: 1183 [2022-01-18 14:30:27,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:30:27,946 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 93 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:27,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 23 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:27,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2022-01-18 14:30:27,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 948. [2022-01-18 14:30:27,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 2.818373812038015) internal successors, (2669), 947 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 2669 transitions. [2022-01-18 14:30:27,960 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 2669 transitions. Word has length 17 [2022-01-18 14:30:27,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:27,960 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 2669 transitions. [2022-01-18 14:30:27,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:27,960 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 2669 transitions. [2022-01-18 14:30:27,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:30:27,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:27,961 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:27,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-18 14:30:28,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-18 14:30:28,161 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:28,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:28,162 INFO L85 PathProgramCache]: Analyzing trace with hash -862782612, now seen corresponding path program 65 times [2022-01-18 14:30:28,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:28,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428151961] [2022-01-18 14:30:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:28,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:28,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:28,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428151961] [2022-01-18 14:30:28,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428151961] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:28,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476161708] [2022-01-18 14:30:28,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:30:28,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:28,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:28,220 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:28,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 14:30:28,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:30:28,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:28,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:30:28,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:28,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:30:28,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476161708] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:30:28,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:30:28,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 14 [2022-01-18 14:30:28,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211131835] [2022-01-18 14:30:28,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:30:28,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:30:28,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:30:28,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:30:28,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:30:28,353 INFO L87 Difference]: Start difference. First operand 948 states and 2669 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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) [2022-01-18 14:30:28,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:30:28,485 INFO L93 Difference]: Finished difference Result 1097 states and 2969 transitions. [2022-01-18 14:30:28,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:30:28,486 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 17 [2022-01-18 14:30:28,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:30:28,488 INFO L225 Difference]: With dead ends: 1097 [2022-01-18 14:30:28,488 INFO L226 Difference]: Without dead ends: 1092 [2022-01-18 14:30:28,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:30:28,488 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 64 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:30:28,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 15 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:30:28,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2022-01-18 14:30:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 948. [2022-01-18 14:30:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 2.8173178458289336) internal successors, (2668), 947 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:30:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 2668 transitions. [2022-01-18 14:30:28,507 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 2668 transitions. Word has length 17 [2022-01-18 14:30:28,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:30:28,507 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 2668 transitions. [2022-01-18 14:30:28,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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) [2022-01-18 14:30:28,508 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 2668 transitions. [2022-01-18 14:30:28,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 14:30:28,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:30:28,509 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:30:28,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 14:30:28,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 14:30:28,726 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:30:28,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:30:28,726 INFO L85 PathProgramCache]: Analyzing trace with hash -636116957, now seen corresponding path program 66 times [2022-01-18 14:30:28,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:30:28,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582681547] [2022-01-18 14:30:28,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:30:28,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:30:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:30:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:28,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:30:28,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582681547] [2022-01-18 14:30:28,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582681547] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:30:28,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072407657] [2022-01-18 14:30:28,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:30:28,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:30:28,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:30:28,779 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:30:28,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 14:30:28,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:30:28,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:30:28,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:30:28,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:30:28,993 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:30:28,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2022-01-18 14:30:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:30:29,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:30:30,015 INFO L353 Elim1Store]: treesize reduction 30, result has 94.3 percent of original size [2022-01-18 14:30:30,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 22 new quantified variables, introduced 66 case distinctions, treesize of input 27 treesize of output 542 [2022-01-18 14:33:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:33:32,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072407657] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:33:32,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:33:32,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 22 [2022-01-18 14:33:32,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767618601] [2022-01-18 14:33:32,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:33:32,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 14:33:32,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:33:32,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 14:33:32,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:33:32,157 INFO L87 Difference]: Start difference. First operand 948 states and 2668 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:33:32,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:33:32,361 INFO L93 Difference]: Finished difference Result 1087 states and 2974 transitions. [2022-01-18 14:33:32,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:33:32,361 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 14:33:32,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:33:32,363 INFO L225 Difference]: With dead ends: 1087 [2022-01-18 14:33:32,363 INFO L226 Difference]: Without dead ends: 1083 [2022-01-18 14:33:32,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:33:32,363 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:33:32,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 55 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:33:32,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-01-18 14:33:32,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1040. [2022-01-18 14:33:32,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 2.798845043310876) internal successors, (2908), 1039 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:33:32,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 2908 transitions. [2022-01-18 14:33:32,375 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 2908 transitions. Word has length 18 [2022-01-18 14:33:32,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:33:32,375 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 2908 transitions. [2022-01-18 14:33:32,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:33:32,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 2908 transitions. [2022-01-18 14:33:32,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 14:33:32,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:33:32,376 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:33:32,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 14:33:32,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 14:33:32,576 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:33:32,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:33:32,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1951492003, now seen corresponding path program 67 times [2022-01-18 14:33:32,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:33:32,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644147523] [2022-01-18 14:33:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:33:32,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:33:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:33:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:33:32,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:33:32,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644147523] [2022-01-18 14:33:32,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644147523] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:33:32,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807129219] [2022-01-18 14:33:32,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:33:32,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:33:32,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:33:32,622 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:33:32,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 14:33:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:33:32,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:33:32,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:33:32,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:33:32,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2022-01-18 14:33:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:33:33,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:33:33,905 INFO L353 Elim1Store]: treesize reduction 30, result has 94.3 percent of original size [2022-01-18 14:33:33,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 22 new quantified variables, introduced 66 case distinctions, treesize of input 27 treesize of output 542 [2022-01-18 14:36:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:36:37,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807129219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:36:37,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:36:37,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 24 [2022-01-18 14:36:37,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318703383] [2022-01-18 14:36:37,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:36:37,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 14:36:37,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:36:37,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 14:36:37,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:36:37,817 INFO L87 Difference]: Start difference. First operand 1040 states and 2908 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 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) [2022-01-18 14:36:38,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:36:38,018 INFO L93 Difference]: Finished difference Result 1204 states and 3288 transitions. [2022-01-18 14:36:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:36:38,018 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 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 18 [2022-01-18 14:36:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:36:38,020 INFO L225 Difference]: With dead ends: 1204 [2022-01-18 14:36:38,020 INFO L226 Difference]: Without dead ends: 1197 [2022-01-18 14:36:38,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:36:38,021 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:36:38,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 42 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:36:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2022-01-18 14:36:38,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1145. [2022-01-18 14:36:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 2.792832167832168) internal successors, (3195), 1144 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:36:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 3195 transitions. [2022-01-18 14:36:38,038 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 3195 transitions. Word has length 18 [2022-01-18 14:36:38,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:36:38,038 INFO L470 AbstractCegarLoop]: Abstraction has 1145 states and 3195 transitions. [2022-01-18 14:36:38,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 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) [2022-01-18 14:36:38,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 3195 transitions. [2022-01-18 14:36:38,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 14:36:38,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:36:38,040 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:36:38,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 14:36:38,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-01-18 14:36:38,253 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:36:38,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:36:38,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2133205787, now seen corresponding path program 68 times [2022-01-18 14:36:38,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:36:38,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987165213] [2022-01-18 14:36:38,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:36:38,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:36:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:36:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:36:38,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:36:38,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987165213] [2022-01-18 14:36:38,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987165213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:36:38,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468732045] [2022-01-18 14:36:38,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:36:38,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:36:38,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:36:38,298 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:36:38,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 14:36:38,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:36:38,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:36:38,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:36:38,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:36:38,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:36:38,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2022-01-18 14:36:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:36:38,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:36:39,373 INFO L353 Elim1Store]: treesize reduction 30, result has 94.3 percent of original size [2022-01-18 14:36:39,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 22 new quantified variables, introduced 66 case distinctions, treesize of input 27 treesize of output 542 [2022-01-18 14:39:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:39:19,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468732045] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:39:19,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:39:19,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 23 [2022-01-18 14:39:19,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36644320] [2022-01-18 14:39:19,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:39:19,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:39:19,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:39:19,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:39:19,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:39:19,695 INFO L87 Difference]: Start difference. First operand 1145 states and 3195 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:39:19,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:39:19,980 INFO L93 Difference]: Finished difference Result 1304 states and 3556 transitions. [2022-01-18 14:39:19,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:39:19,981 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 14:39:19,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:39:19,983 INFO L225 Difference]: With dead ends: 1304 [2022-01-18 14:39:19,983 INFO L226 Difference]: Without dead ends: 1294 [2022-01-18 14:39:19,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:39:19,983 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:39:19,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 74 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:39:19,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-01-18 14:39:19,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1224. [2022-01-18 14:39:19,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 2.8070318887980377) internal successors, (3433), 1223 states have internal predecessors, (3433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:39:19,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 3433 transitions. [2022-01-18 14:39:19,998 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 3433 transitions. Word has length 18 [2022-01-18 14:39:19,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:39:19,998 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 3433 transitions. [2022-01-18 14:39:19,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:39:19,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 3433 transitions. [2022-01-18 14:39:20,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 14:39:20,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:39:20,000 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:39:20,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 14:39:20,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:39:20,222 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:39:20,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:39:20,222 INFO L85 PathProgramCache]: Analyzing trace with hash -823601501, now seen corresponding path program 69 times [2022-01-18 14:39:20,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:39:20,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676335913] [2022-01-18 14:39:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:39:20,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:39:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:39:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:39:20,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:39:20,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676335913] [2022-01-18 14:39:20,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676335913] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:39:20,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006538579] [2022-01-18 14:39:20,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:39:20,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:39:20,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:39:20,275 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:39:20,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 14:39:20,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 14:39:20,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:39:20,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:39:20,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:39:20,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:39:20,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2022-01-18 14:39:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:39:20,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:39:21,397 INFO L353 Elim1Store]: treesize reduction 30, result has 94.3 percent of original size [2022-01-18 14:39:21,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 22 new quantified variables, introduced 66 case distinctions, treesize of input 27 treesize of output 542 [2022-01-18 14:41:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:41:18,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006538579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:41:18,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:41:18,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 22 [2022-01-18 14:41:18,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324713297] [2022-01-18 14:41:18,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:41:18,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 14:41:18,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:41:18,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 14:41:18,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:41:18,239 INFO L87 Difference]: Start difference. First operand 1224 states and 3433 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:41:18,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:41:18,441 INFO L93 Difference]: Finished difference Result 1413 states and 3929 transitions. [2022-01-18 14:41:18,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:41:18,441 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 14:41:18,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:41:18,443 INFO L225 Difference]: With dead ends: 1413 [2022-01-18 14:41:18,443 INFO L226 Difference]: Without dead ends: 1404 [2022-01-18 14:41:18,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:41:18,444 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:41:18,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 40 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:41:18,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-01-18 14:41:18,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1345. [2022-01-18 14:41:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 2.845982142857143) internal successors, (3825), 1344 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:41:18,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 3825 transitions. [2022-01-18 14:41:18,464 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 3825 transitions. Word has length 18 [2022-01-18 14:41:18,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:41:18,465 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 3825 transitions. [2022-01-18 14:41:18,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:41:18,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 3825 transitions. [2022-01-18 14:41:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 14:41:18,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:41:18,466 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:41:18,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-01-18 14:41:18,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:41:18,683 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:41:18,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:41:18,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2004653083, now seen corresponding path program 70 times [2022-01-18 14:41:18,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:41:18,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341158375] [2022-01-18 14:41:18,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:41:18,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:41:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:41:18,724 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:41:18,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:41:18,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341158375] [2022-01-18 14:41:18,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341158375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:41:18,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478758282] [2022-01-18 14:41:18,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:41:18,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:41:18,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:41:18,725 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:41:18,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 14:41:18,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:41:18,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:41:18,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:41:18,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:41:18,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:41:18,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2022-01-18 14:41:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:41:19,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:41:19,723 INFO L353 Elim1Store]: treesize reduction 30, result has 94.3 percent of original size [2022-01-18 14:41:19,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 22 new quantified variables, introduced 66 case distinctions, treesize of input 27 treesize of output 542 Received shutdown request... [2022-01-18 14:43:14,339 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-18 14:43:14,341 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 14:43:14,344 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 14:43:14,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-18 14:43:14,377 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 14:43:14,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:14,541 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 19 with TraceHistMax 6,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 9ms.. [2022-01-18 14:43:14,543 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 14:43:14,543 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 14:43:14,546 INFO L732 BasicCegarLoop]: Path program histogram: [70, 2, 1, 1] [2022-01-18 14:43:14,547 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 14:43:14,548 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 14:43:14,549 INFO L202 PluginConnector]: Adding new model unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 02:43:14 BasicIcfg [2022-01-18 14:43:14,549 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 14:43:14,550 INFO L158 Benchmark]: Toolchain (without parser) took 815797.97ms. Allocated memory was 379.6MB in the beginning and 1.2GB in the end (delta: 851.4MB). Free memory was 341.4MB in the beginning and 819.2MB in the end (delta: -477.7MB). Peak memory consumption was 757.9MB. Max. memory is 16.0GB. [2022-01-18 14:43:14,550 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 379.6MB. Free memory is still 342.5MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 14:43:14,550 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.60ms. Allocated memory is still 379.6MB. Free memory was 341.4MB in the beginning and 339.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 14:43:14,550 INFO L158 Benchmark]: Boogie Preprocessor took 15.04ms. Allocated memory is still 379.6MB. Free memory was 339.8MB in the beginning and 338.9MB in the end (delta: 928.9kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 14:43:14,550 INFO L158 Benchmark]: RCFGBuilder took 260.95ms. Allocated memory is still 379.6MB. Free memory was 338.9MB in the beginning and 329.0MB in the end (delta: 9.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2022-01-18 14:43:14,550 INFO L158 Benchmark]: TraceAbstraction took 815493.06ms. Allocated memory was 379.6MB in the beginning and 1.2GB in the end (delta: 851.4MB). Free memory was 328.6MB in the beginning and 819.2MB in the end (delta: -490.5MB). Peak memory consumption was 745.3MB. Max. memory is 16.0GB. [2022-01-18 14:43:14,550 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 379.6MB. Free memory is still 342.5MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 21.60ms. Allocated memory is still 379.6MB. Free memory was 341.4MB in the beginning and 339.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 15.04ms. Allocated memory is still 379.6MB. Free memory was 339.8MB in the beginning and 338.9MB in the end (delta: 928.9kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 260.95ms. Allocated memory is still 379.6MB. Free memory was 338.9MB in the beginning and 329.0MB in the end (delta: 9.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 815493.06ms. Allocated memory was 379.6MB in the beginning and 1.2GB in the end (delta: 851.4MB). Free memory was 328.6MB in the beginning and 819.2MB in the end (delta: -490.5MB). Peak memory consumption was 745.3MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 19 with TraceHistMax 6,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 9ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 19 with TraceHistMax 6,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 9ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 19 with TraceHistMax 6,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 9ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 815.4s, OverallIterations: 74, TraceHistogramMax: 6, PathProgramHistogramMax: 70, EmptinessCheckTime: 0.1s, AutomataDifference: 8.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4543 SdHoareTripleChecker+Valid, 5.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4543 mSDsluCounter, 2050 SdHoareTripleChecker+Invalid, 4.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6246 mSDsCounter, 1507 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12342 IncrementalHoareTripleChecker+Invalid, 13849 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1507 mSolverCounterUnsat, 361 mSDtfsCounter, 12342 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2936 GetRequests, 1579 SyntacticMatches, 139 SemanticMatches, 1218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6387 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1345occurred in iteration=73, InterpolantAutomatonStates: 1046, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 73 MinimizatonAttempts, 6434 StatesRemovedByMinimization, 68 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 672.8s InterpolantComputationTime, 2145 NumberOfCodeBlocks, 2145 NumberOfCodeBlocksAsserted, 241 NumberOfCheckSat, 2990 ConstructedInterpolants, 0 QuantifiedInterpolants, 16764 SizeOfPredicates, 124 NumberOfNonLiveVariables, 3960 ConjunctsInSsa, 698 ConjunctsInUnsatCore, 213 InterpolantComputations, 3 PerfectInterpolantSequences, 1229/3056 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown