/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 07:08:38,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 07:08:38,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 07:08:38,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 07:08:38,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 07:08:38,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 07:08:38,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 07:08:38,375 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-01-18 07:08:38,401 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 07:08:38,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 07:08:38,401 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 07:08:38,402 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 07:08:38,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 07:08:38,402 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 07:08:38,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 07:08:38,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 07:08:38,403 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 07:08:38,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 07:08:38,403 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 07:08:38,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 07:08:38,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 07:08:38,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 07:08:38,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 07:08:38,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 07:08:38,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 07:08:38,403 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 07:08:38,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 07:08:38,404 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 07:08:38,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 07:08:38,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 07:08:38,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 07:08:38,404 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 07:08:38,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 07:08:38,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 07:08:38,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 07:08:38,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 07:08:38,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 07:08:38,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 07:08:38,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 07:08:38,405 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 07:08:38,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 07:08:38,405 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 07:08:38,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 07:08:38,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 07:08:38,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 07:08:38,623 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 07:08:38,624 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 07:08:38,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl [2022-01-18 07:08:38,625 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl' [2022-01-18 07:08:38,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 07:08:38,656 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 07:08:38,657 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 07:08:38,657 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 07:08:38,657 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 07:08:38,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:08:38" (1/1) ... [2022-01-18 07:08:38,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:08:38" (1/1) ... [2022-01-18 07:08:38,683 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 07:08:38,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 07:08:38,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 07:08:38,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 07:08:38,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 07:08:38,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:08:38" (1/1) ... [2022-01-18 07:08:38,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:08:38" (1/1) ... [2022-01-18 07:08:38,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:08:38" (1/1) ... [2022-01-18 07:08:38,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:08:38" (1/1) ... [2022-01-18 07:08:38,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:08:38" (1/1) ... [2022-01-18 07:08:38,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:08:38" (1/1) ... [2022-01-18 07:08:38,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:08:38" (1/1) ... [2022-01-18 07:08:38,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 07:08:38,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 07:08:38,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 07:08:38,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 07:08:38,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:08:38" (1/1) ... [2022-01-18 07:08:38,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 07:08:38,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:38,738 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 07:08:38,753 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 07:08:38,773 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 07:08:38,773 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 07:08:38,773 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 07:08:38,773 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 07:08:38,773 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 07:08:38,773 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 07:08:38,774 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 07:08:38,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 07:08:38,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 07:08:38,774 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 07:08:38,774 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 07:08:38,774 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 07:08:38,775 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 07:08:38,808 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 07:08:38,808 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 07:08:38,875 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 07:08:38,886 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 07:08:38,886 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 07:08:38,888 INFO L202 PluginConnector]: Adding new model mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 07:08:38 BoogieIcfgContainer [2022-01-18 07:08:38,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 07:08:38,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 07:08:38,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 07:08:38,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 07:08:38,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:08:38" (1/2) ... [2022-01-18 07:08:38,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a909a7f and model type mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 07:08:38, skipping insertion in model container [2022-01-18 07:08:38,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 07:08:38" (2/2) ... [2022-01-18 07:08:38,897 INFO L111 eAbstractionObserver]: Analyzing ICFG mts-array.wvr.bpl [2022-01-18 07:08:38,905 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 07:08:38,906 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 07:08:38,906 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 07:08:38,906 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 07:08:38,963 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 07:08:39,009 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 07:08:39,022 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 07:08:39,035 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 07:08:39,041 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-01-18 07:08:39,080 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states 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 07:08:39,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states 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 07:08:39,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 07:08:39,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:39,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:39,091 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:39,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:39,096 INFO L85 PathProgramCache]: Analyzing trace with hash -427804195, now seen corresponding path program 1 times [2022-01-18 07:08:39,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:39,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789330748] [2022-01-18 07:08:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:39,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:39,260 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 07:08:39,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:39,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789330748] [2022-01-18 07:08:39,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789330748] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 07:08:39,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 07:08:39,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 07:08:39,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494812407] [2022-01-18 07:08:39,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:08:39,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 07:08:39,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:39,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 07:08:39,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 07:08:39,320 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 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 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 07:08:39,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:39,392 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2022-01-18 07:08:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 07:08:39,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 18 [2022-01-18 07:08:39,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:39,407 INFO L225 Difference]: With dead ends: 154 [2022-01-18 07:08:39,407 INFO L226 Difference]: Without dead ends: 154 [2022-01-18 07:08:39,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 07:08:39,415 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 77 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:39,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 07:08:39,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-18 07:08:39,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2022-01-18 07:08:39,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 07:08:39,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-01-18 07:08:39,472 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2022-01-18 07:08:39,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:39,473 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-01-18 07:08:39,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 07:08:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-01-18 07:08:39,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 07:08:39,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:39,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:39,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 07:08:39,482 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:39,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:39,483 INFO L85 PathProgramCache]: Analyzing trace with hash -436737251, now seen corresponding path program 1 times [2022-01-18 07:08:39,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:39,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656633341] [2022-01-18 07:08:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:39,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:08:39,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:39,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656633341] [2022-01-18 07:08:39,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656633341] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 07:08:39,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 07:08:39,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 07:08:39,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755710332] [2022-01-18 07:08:39,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:08:39,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 07:08:39,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:39,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 07:08:39,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 07:08:39,540 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 07:08:39,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:39,586 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2022-01-18 07:08:39,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 07:08:39,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 07:08:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:39,592 INFO L225 Difference]: With dead ends: 158 [2022-01-18 07:08:39,592 INFO L226 Difference]: Without dead ends: 158 [2022-01-18 07:08:39,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:08:39,593 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:39,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 07:08:39,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-18 07:08:39,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-01-18 07:08:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states 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 07:08:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-01-18 07:08:39,612 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-01-18 07:08:39,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:39,612 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-01-18 07:08:39,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 07:08:39,612 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-01-18 07:08:39,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 07:08:39,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:39,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:39,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 07:08:39,614 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:39,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:39,614 INFO L85 PathProgramCache]: Analyzing trace with hash 277137723, now seen corresponding path program 1 times [2022-01-18 07:08:39,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:39,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923942598] [2022-01-18 07:08:39,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:39,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:39,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:39,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923942598] [2022-01-18 07:08:39,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923942598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:39,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330074323] [2022-01-18 07:08:39,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:39,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:39,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:39,992 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 07:08:40,031 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 07:08:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:40,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 07:08:40,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:40,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:08:40,646 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 40 [2022-01-18 07:08:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:40,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:41,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:08:41,291 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 95 [2022-01-18 07:08:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:42,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330074323] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:42,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:42,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 19 [2022-01-18 07:08:42,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651969350] [2022-01-18 07:08:42,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:42,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 07:08:42,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:42,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 07:08:42,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 07:08:42,042 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:42,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:42,450 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-01-18 07:08:42,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 07:08:42,451 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 07:08:42,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:42,455 INFO L225 Difference]: With dead ends: 366 [2022-01-18 07:08:42,455 INFO L226 Difference]: Without dead ends: 351 [2022-01-18 07:08:42,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:08:42,461 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 198 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:42,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 84 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 309 Invalid, 0 Unknown, 1 Unchecked, 0.2s Time] [2022-01-18 07:08:42,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-01-18 07:08:42,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-01-18 07:08:42,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states 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 07:08:42,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-01-18 07:08:42,486 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-01-18 07:08:42,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:42,486 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-01-18 07:08:42,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:42,486 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-01-18 07:08:42,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 07:08:42,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:42,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:42,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-18 07:08:42,696 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 07:08:42,696 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:42,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:42,697 INFO L85 PathProgramCache]: Analyzing trace with hash 109328631, now seen corresponding path program 2 times [2022-01-18 07:08:42,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:42,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247577745] [2022-01-18 07:08:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:42,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:43,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:43,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247577745] [2022-01-18 07:08:43,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247577745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:43,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237023397] [2022-01-18 07:08:43,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:08:43,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:43,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:43,027 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 07:08:43,028 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 07:08:43,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:08:43,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:08:43,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 07:08:43,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:43,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:08:43,355 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 44 [2022-01-18 07:08:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:43,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:43,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:08:43,826 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 69 [2022-01-18 07:08:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:44,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237023397] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:44,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:44,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 20 [2022-01-18 07:08:44,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986856348] [2022-01-18 07:08:44,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:44,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 07:08:44,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:44,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 07:08:44,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-18 07:08:44,195 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:44,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:44,978 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-01-18 07:08:44,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 07:08:44,979 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 07:08:44,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:44,981 INFO L225 Difference]: With dead ends: 478 [2022-01-18 07:08:44,981 INFO L226 Difference]: Without dead ends: 463 [2022-01-18 07:08:44,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 07:08:44,982 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 230 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:44,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 126 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 590 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-01-18 07:08:44,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-18 07:08:44,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-01-18 07:08:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-01-18 07:08:44,991 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-01-18 07:08:44,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:44,992 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-01-18 07:08:44,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:44,992 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-01-18 07:08:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 07:08:44,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:44,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:45,023 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 07:08:45,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-18 07:08:45,207 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:45,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:45,208 INFO L85 PathProgramCache]: Analyzing trace with hash 408102079, now seen corresponding path program 3 times [2022-01-18 07:08:45,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:45,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509061360] [2022-01-18 07:08:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:45,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:45,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:45,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509061360] [2022-01-18 07:08:45,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509061360] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:45,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834182351] [2022-01-18 07:08:45,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:08:45,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:45,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:45,401 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 07:08:45,402 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 07:08:45,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 07:08:45,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:08:45,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 07:08:45,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:45,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 40 [2022-01-18 07:08:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:45,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:45,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:08:45,974 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 99 [2022-01-18 07:08:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:46,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834182351] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:46,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:46,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2022-01-18 07:08:46,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108775215] [2022-01-18 07:08:46,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:46,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 07:08:46,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:46,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 07:08:46,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-01-18 07:08:46,430 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:47,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:47,026 INFO L93 Difference]: Finished difference Result 433 states and 1240 transitions. [2022-01-18 07:08:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 07:08:47,026 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 07:08:47,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:47,028 INFO L225 Difference]: With dead ends: 433 [2022-01-18 07:08:47,028 INFO L226 Difference]: Without dead ends: 418 [2022-01-18 07:08:47,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:08:47,029 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 111 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:47,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 147 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 377 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-01-18 07:08:47,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-18 07:08:47,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 241. [2022-01-18 07:08:47,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states 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 07:08:47,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-01-18 07:08:47,040 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-01-18 07:08:47,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:47,040 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-01-18 07:08:47,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:47,040 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-01-18 07:08:47,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 07:08:47,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:47,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:47,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 07:08:47,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:47,254 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:47,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:47,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1978927679, now seen corresponding path program 4 times [2022-01-18 07:08:47,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:47,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981114455] [2022-01-18 07:08:47,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:47,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:47,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:47,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981114455] [2022-01-18 07:08:47,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981114455] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:47,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99898467] [2022-01-18 07:08:47,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:08:47,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:47,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:47,443 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 07:08:47,444 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 07:08:47,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:08:47,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:08:47,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 07:08:47,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:47,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:08:47,669 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 46 [2022-01-18 07:08:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:47,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:48,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:08:48,150 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 99 [2022-01-18 07:08:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:48,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99898467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:48,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:48,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 07:08:48,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607378757] [2022-01-18 07:08:48,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:48,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 07:08:48,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:48,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 07:08:48,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-01-18 07:08:48,394 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:48,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:48,712 INFO L93 Difference]: Finished difference Result 374 states and 1089 transitions. [2022-01-18 07:08:48,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 07:08:48,713 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 07:08:48,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:48,714 INFO L225 Difference]: With dead ends: 374 [2022-01-18 07:08:48,714 INFO L226 Difference]: Without dead ends: 359 [2022-01-18 07:08:48,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:08:48,715 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:48,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 152 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 380 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-18 07:08:48,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-18 07:08:48,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 245. [2022-01-18 07:08:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.9262295081967213) internal successors, (714), 244 states have internal predecessors, (714), 0 states have call successors, (0), 0 states 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 07:08:48,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 714 transitions. [2022-01-18 07:08:48,720 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 714 transitions. Word has length 22 [2022-01-18 07:08:48,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:48,721 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 714 transitions. [2022-01-18 07:08:48,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:48,721 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 714 transitions. [2022-01-18 07:08:48,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 07:08:48,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:48,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:48,739 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 07:08:48,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:48,932 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:48,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:48,933 INFO L85 PathProgramCache]: Analyzing trace with hash 2069580027, now seen corresponding path program 5 times [2022-01-18 07:08:48,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:48,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204619301] [2022-01-18 07:08:48,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:48,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:49,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:49,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204619301] [2022-01-18 07:08:49,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204619301] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:49,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450874055] [2022-01-18 07:08:49,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:08:49,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:49,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:49,118 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 07:08:49,119 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 07:08:49,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:08:49,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:08:49,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 07:08:49,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:49,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:08:49,335 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 81 treesize of output 62 [2022-01-18 07:08:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:49,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:49,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:08:49,714 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 99 [2022-01-18 07:08:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:50,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450874055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:50,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:50,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2022-01-18 07:08:50,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909030945] [2022-01-18 07:08:50,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:50,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 07:08:50,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:50,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 07:08:50,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-01-18 07:08:50,039 INFO L87 Difference]: Start difference. First operand 245 states and 714 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:51,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:51,248 INFO L93 Difference]: Finished difference Result 941 states and 2727 transitions. [2022-01-18 07:08:51,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 07:08:51,249 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 07:08:51,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:51,252 INFO L225 Difference]: With dead ends: 941 [2022-01-18 07:08:51,252 INFO L226 Difference]: Without dead ends: 926 [2022-01-18 07:08:51,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 07:08:51,253 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 183 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:51,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 265 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 452 Invalid, 0 Unknown, 158 Unchecked, 0.3s Time] [2022-01-18 07:08:51,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-01-18 07:08:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 247. [2022-01-18 07:08:51,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states 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 07:08:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-01-18 07:08:51,261 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-01-18 07:08:51,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:51,261 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-01-18 07:08:51,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:51,261 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-01-18 07:08:51,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 07:08:51,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:51,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:51,280 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 07:08:51,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:51,463 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:51,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:51,463 INFO L85 PathProgramCache]: Analyzing trace with hash -809004765, now seen corresponding path program 6 times [2022-01-18 07:08:51,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:51,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932366519] [2022-01-18 07:08:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:51,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:51,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:51,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932366519] [2022-01-18 07:08:51,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932366519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:51,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685847293] [2022-01-18 07:08:51,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:08:51,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:51,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:51,698 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 07:08:51,699 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 07:08:51,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 07:08:51,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:08:51,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 07:08:51,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:51,976 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 07:08:51,976 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 81 treesize of output 57 [2022-01-18 07:08:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:52,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:52,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:08:52,406 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 99 [2022-01-18 07:08:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:52,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685847293] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:52,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:52,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2022-01-18 07:08:52,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9736828] [2022-01-18 07:08:52,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:52,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 07:08:52,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:52,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 07:08:52,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-01-18 07:08:52,946 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:53,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:53,869 INFO L93 Difference]: Finished difference Result 697 states and 2001 transitions. [2022-01-18 07:08:53,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 07:08:53,869 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 07:08:53,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:53,872 INFO L225 Difference]: With dead ends: 697 [2022-01-18 07:08:53,872 INFO L226 Difference]: Without dead ends: 682 [2022-01-18 07:08:53,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=206, Invalid=786, Unknown=0, NotChecked=0, Total=992 [2022-01-18 07:08:53,872 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 134 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:53,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 211 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 348 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-01-18 07:08:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-01-18 07:08:53,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 247. [2022-01-18 07:08:53,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states 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 07:08:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-01-18 07:08:53,880 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-01-18 07:08:53,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:53,880 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-01-18 07:08:53,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:53,881 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-01-18 07:08:53,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 07:08:53,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:53,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:53,907 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 07:08:54,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:54,083 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:54,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:54,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1770731385, now seen corresponding path program 7 times [2022-01-18 07:08:54,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:54,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424921515] [2022-01-18 07:08:54,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:54,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:54,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:54,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424921515] [2022-01-18 07:08:54,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424921515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:54,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931312608] [2022-01-18 07:08:54,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:08:54,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:54,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:54,294 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 07:08:54,295 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 07:08:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:54,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 07:08:54,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:54,641 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 07:08:54,641 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 81 treesize of output 55 [2022-01-18 07:08:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:54,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:55,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:08:55,067 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 99 [2022-01-18 07:08:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:55,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931312608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:55,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:55,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2022-01-18 07:08:55,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276547965] [2022-01-18 07:08:55,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:55,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 07:08:55,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:55,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 07:08:55,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-18 07:08:55,565 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:56,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:56,587 INFO L93 Difference]: Finished difference Result 713 states and 2059 transitions. [2022-01-18 07:08:56,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 07:08:56,587 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 07:08:56,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:56,590 INFO L225 Difference]: With dead ends: 713 [2022-01-18 07:08:56,590 INFO L226 Difference]: Without dead ends: 698 [2022-01-18 07:08:56,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 07:08:56,591 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 151 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:56,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 236 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 424 Invalid, 0 Unknown, 280 Unchecked, 0.2s Time] [2022-01-18 07:08:56,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-01-18 07:08:56,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 247. [2022-01-18 07:08:56,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states 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 07:08:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-01-18 07:08:56,597 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-01-18 07:08:56,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:56,597 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-01-18 07:08:56,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:56,598 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-01-18 07:08:56,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:08:56,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:56,598 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:56,614 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 07:08:56,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:56,811 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:56,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:56,811 INFO L85 PathProgramCache]: Analyzing trace with hash -973582823, now seen corresponding path program 8 times [2022-01-18 07:08:56,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:56,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612143919] [2022-01-18 07:08:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:56,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:56,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:56,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612143919] [2022-01-18 07:08:56,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612143919] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:56,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727541773] [2022-01-18 07:08:56,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:08:56,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:56,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:56,867 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 07:08:56,868 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 07:08:56,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:08:56,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:08:56,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:08:56,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:56,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:57,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727541773] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:57,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:57,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 07:08:57,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309099060] [2022-01-18 07:08:57,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:57,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 07:08:57,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:57,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 07:08:57,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 07:08:57,070 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:57,823 INFO L93 Difference]: Finished difference Result 1099 states and 3110 transitions. [2022-01-18 07:08:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 07:08:57,823 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:08:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:57,828 INFO L225 Difference]: With dead ends: 1099 [2022-01-18 07:08:57,828 INFO L226 Difference]: Without dead ends: 1099 [2022-01-18 07:08:57,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 07:08:57,830 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 267 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:57,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 206 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:08:57,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-01-18 07:08:57,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 311. [2022-01-18 07:08:57,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.141935483870968) internal successors, (974), 310 states have internal predecessors, (974), 0 states have call successors, (0), 0 states 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 07:08:57,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 974 transitions. [2022-01-18 07:08:57,845 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 974 transitions. Word has length 24 [2022-01-18 07:08:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:57,845 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 974 transitions. [2022-01-18 07:08:57,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:57,846 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 974 transitions. [2022-01-18 07:08:57,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:08:57,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:57,847 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:57,887 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 07:08:58,067 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,SelfDestructingSolverStorable9 [2022-01-18 07:08:58,067 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:58,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:58,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1949901667, now seen corresponding path program 9 times [2022-01-18 07:08:58,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:58,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053957789] [2022-01-18 07:08:58,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:58,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:58,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:58,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053957789] [2022-01-18 07:08:58,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053957789] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:58,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587282641] [2022-01-18 07:08:58,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:08:58,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:58,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:58,131 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 07:08:58,159 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 07:08:58,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:08:58,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:08:58,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:08:58,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:58,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:58,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587282641] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:58,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:58,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 07:08:58,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330486259] [2022-01-18 07:08:58,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:58,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 07:08:58,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:58,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 07:08:58,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 07:08:58,350 INFO L87 Difference]: Start difference. First operand 311 states and 974 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:00,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:00,048 INFO L93 Difference]: Finished difference Result 1794 states and 5013 transitions. [2022-01-18 07:09:00,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 07:09:00,048 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:00,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:00,068 INFO L225 Difference]: With dead ends: 1794 [2022-01-18 07:09:00,068 INFO L226 Difference]: Without dead ends: 1794 [2022-01-18 07:09:00,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 07:09:00,071 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 411 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:00,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 333 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 07:09:00,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-01-18 07:09:00,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 315. [2022-01-18 07:09:00,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states 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 07:09:00,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-01-18 07:09:00,092 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-01-18 07:09:00,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:00,092 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-01-18 07:09:00,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:00,093 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-01-18 07:09:00,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:00,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:00,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:00,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-18 07:09:00,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:00,307 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:00,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:00,308 INFO L85 PathProgramCache]: Analyzing trace with hash -420997023, now seen corresponding path program 10 times [2022-01-18 07:09:00,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:00,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920813024] [2022-01-18 07:09:00,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:00,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:00,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:00,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920813024] [2022-01-18 07:09:00,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920813024] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:00,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360908004] [2022-01-18 07:09:00,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:09:00,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:00,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:00,357 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 07:09:00,358 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 07:09:00,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:09:00,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:00,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:00,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:00,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:00,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360908004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:00,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:00,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 07:09:00,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500301679] [2022-01-18 07:09:00,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:00,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 07:09:00,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:00,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 07:09:00,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-18 07:09:00,587 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:01,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:01,434 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-01-18 07:09:01,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 07:09:01,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:01,439 INFO L225 Difference]: With dead ends: 1470 [2022-01-18 07:09:01,439 INFO L226 Difference]: Without dead ends: 1470 [2022-01-18 07:09:01,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 07:09:01,441 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 388 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:01,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 257 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:09:01,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-01-18 07:09:01,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-01-18 07:09:01,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 07:09:01,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-01-18 07:09:01,461 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-01-18 07:09:01,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:01,461 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-01-18 07:09:01,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:01,461 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-01-18 07:09:01,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:01,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:01,462 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:01,480 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 07:09:01,675 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,SelfDestructingSolverStorable11 [2022-01-18 07:09:01,675 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:01,675 INFO L85 PathProgramCache]: Analyzing trace with hash -446810915, now seen corresponding path program 1 times [2022-01-18 07:09:01,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:01,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560940425] [2022-01-18 07:09:01,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:01,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:09:01,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:01,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560940425] [2022-01-18 07:09:01,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560940425] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:01,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165061984] [2022-01-18 07:09:01,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:01,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:01,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:01,707 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 07:09:01,708 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 07:09:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:01,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 07:09:01,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:09:01,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:09:01,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165061984] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:01,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:01,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 07:09:01,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715698977] [2022-01-18 07:09:01,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:01,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 07:09:01,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:01,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 07:09:01,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-18 07:09:01,905 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:02,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:02,031 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-01-18 07:09:02,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 07:09:02,031 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:02,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:02,033 INFO L225 Difference]: With dead ends: 685 [2022-01-18 07:09:02,033 INFO L226 Difference]: Without dead ends: 679 [2022-01-18 07:09:02,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:09:02,034 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 146 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:02,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 40 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:09:02,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-18 07:09:02,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-01-18 07:09:02,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states 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 07:09:02,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-01-18 07:09:02,043 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-01-18 07:09:02,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:02,043 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-01-18 07:09:02,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:02,043 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-01-18 07:09:02,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:02,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:02,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:02,061 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 07:09:02,259 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,SelfDestructingSolverStorable12 [2022-01-18 07:09:02,259 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:02,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:02,260 INFO L85 PathProgramCache]: Analyzing trace with hash -883779623, now seen corresponding path program 11 times [2022-01-18 07:09:02,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:02,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199274573] [2022-01-18 07:09:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:02,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:02,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:02,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199274573] [2022-01-18 07:09:02,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199274573] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:02,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923101232] [2022-01-18 07:09:02,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:09:02,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:02,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:02,303 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 07:09:02,304 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 07:09:02,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:09:02,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:02,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:02,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:02,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:02,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923101232] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:02,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:02,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 07:09:02,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313981548] [2022-01-18 07:09:02,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:02,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 07:09:02,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:02,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 07:09:02,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-18 07:09:02,468 INFO L87 Difference]: Start difference. First operand 429 states and 1387 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 07:09:02,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:02,764 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-01-18 07:09:02,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 07:09:02,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:02,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:02,768 INFO L225 Difference]: With dead ends: 1159 [2022-01-18 07:09:02,768 INFO L226 Difference]: Without dead ends: 1111 [2022-01-18 07:09:02,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-01-18 07:09:02,769 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 272 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:02,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 118 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:09:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-01-18 07:09:02,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-01-18 07:09:02,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states 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 07:09:02,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-01-18 07:09:02,792 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-01-18 07:09:02,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:02,792 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-01-18 07:09:02,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 07:09:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-01-18 07:09:02,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:02,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:02,794 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:02,838 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 07:09:02,994 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,SelfDestructingSolverStorable13 [2022-01-18 07:09:02,994 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:02,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:02,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1589736955, now seen corresponding path program 2 times [2022-01-18 07:09:02,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:02,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744610392] [2022-01-18 07:09:02,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:02,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:09:03,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:03,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744610392] [2022-01-18 07:09:03,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744610392] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:03,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106000569] [2022-01-18 07:09:03,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:09:03,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:03,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:03,041 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 07:09:03,059 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 07:09:03,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:09:03,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:03,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 07:09:03,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:09:03,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:09:03,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106000569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:03,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:03,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 07:09:03,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716189990] [2022-01-18 07:09:03,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:03,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 07:09:03,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:03,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 07:09:03,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 07:09:03,219 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:03,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:03,390 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-01-18 07:09:03,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 07:09:03,391 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:03,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:03,395 INFO L225 Difference]: With dead ends: 1267 [2022-01-18 07:09:03,395 INFO L226 Difference]: Without dead ends: 1267 [2022-01-18 07:09:03,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-01-18 07:09:03,396 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 201 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:03,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 61 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:09:03,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-01-18 07:09:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-01-18 07:09:03,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states 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 07:09:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-01-18 07:09:03,409 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-01-18 07:09:03,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:03,409 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-01-18 07:09:03,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-01-18 07:09:03,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:03,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:03,411 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:03,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-18 07:09:03,626 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,SelfDestructingSolverStorable14 [2022-01-18 07:09:03,626 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:03,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:03,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1358548775, now seen corresponding path program 12 times [2022-01-18 07:09:03,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:03,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384598437] [2022-01-18 07:09:03,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:03,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:03,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:03,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384598437] [2022-01-18 07:09:03,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384598437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:03,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897777693] [2022-01-18 07:09:03,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:09:03,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:03,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:03,667 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 07:09:03,668 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 07:09:03,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:09:03,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:03,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:03,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:03,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:03,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897777693] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:03,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:03,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 07:09:03,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166819576] [2022-01-18 07:09:03,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:03,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 07:09:03,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:03,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 07:09:03,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-18 07:09:03,826 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 07:09:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:04,325 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-01-18 07:09:04,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 07:09:04,325 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-01-18 07:09:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:04,332 INFO L225 Difference]: With dead ends: 2268 [2022-01-18 07:09:04,332 INFO L226 Difference]: Without dead ends: 2268 [2022-01-18 07:09:04,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 07:09:04,333 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 227 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:04,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 168 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:09:04,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-01-18 07:09:04,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-01-18 07:09:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states 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 07:09:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-01-18 07:09:04,353 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-01-18 07:09:04,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:04,353 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-01-18 07:09:04,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 07:09:04,353 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-01-18 07:09:04,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:04,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:04,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:04,375 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 07:09:04,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:04,569 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:04,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:04,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2143462869, now seen corresponding path program 13 times [2022-01-18 07:09:04,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:04,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348371336] [2022-01-18 07:09:04,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:04,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:04,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:04,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348371336] [2022-01-18 07:09:04,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348371336] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:04,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570738386] [2022-01-18 07:09:04,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:09:04,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:04,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:04,610 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 07:09:04,611 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 07:09:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:04,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:04,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:04,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:04,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570738386] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:04,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:04,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 07:09:04,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382270673] [2022-01-18 07:09:04,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:04,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 07:09:04,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:04,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 07:09:04,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 07:09:04,774 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 07:09:05,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:05,348 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-01-18 07:09:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 07:09:05,348 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-01-18 07:09:05,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:05,376 INFO L225 Difference]: With dead ends: 2256 [2022-01-18 07:09:05,376 INFO L226 Difference]: Without dead ends: 2256 [2022-01-18 07:09:05,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 07:09:05,377 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 280 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:05,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 158 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:09:05,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-01-18 07:09:05,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-01-18 07:09:05,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states 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 07:09:05,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-01-18 07:09:05,412 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-01-18 07:09:05,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:05,412 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-01-18 07:09:05,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 07:09:05,412 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-01-18 07:09:05,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:05,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:05,424 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:05,475 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 07:09:05,665 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,SelfDestructingSolverStorable16 [2022-01-18 07:09:05,665 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:05,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:05,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1763448965, now seen corresponding path program 14 times [2022-01-18 07:09:05,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:05,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197970179] [2022-01-18 07:09:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:05,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:05,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:05,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197970179] [2022-01-18 07:09:05,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197970179] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:05,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492473358] [2022-01-18 07:09:05,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:09:05,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:05,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:05,727 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 07:09:05,753 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 07:09:05,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:09:05,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:05,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:05,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:05,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:05,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492473358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:05,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:05,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-01-18 07:09:05,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854180833] [2022-01-18 07:09:05,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:05,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 07:09:05,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:05,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 07:09:05,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-18 07:09:05,912 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:06,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:06,186 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-01-18 07:09:06,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 07:09:06,186 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:06,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:06,195 INFO L225 Difference]: With dead ends: 1611 [2022-01-18 07:09:06,195 INFO L226 Difference]: Without dead ends: 1611 [2022-01-18 07:09:06,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-01-18 07:09:06,198 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 188 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:06,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 152 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:09:06,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-01-18 07:09:06,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-01-18 07:09:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states 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 07:09:06,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-01-18 07:09:06,238 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-01-18 07:09:06,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:06,238 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-01-18 07:09:06,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:06,238 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-01-18 07:09:06,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:06,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:06,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:06,275 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 07:09:06,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 07:09:06,460 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:06,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:06,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1205384683, now seen corresponding path program 15 times [2022-01-18 07:09:06,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:06,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117778301] [2022-01-18 07:09:06,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:06,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:06,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:06,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117778301] [2022-01-18 07:09:06,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117778301] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:06,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732022770] [2022-01-18 07:09:06,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:09:06,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:06,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:06,525 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 07:09:06,527 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 07:09:06,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 07:09:06,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:06,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:06,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:06,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:06,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732022770] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:06,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:06,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 07:09:06,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422030916] [2022-01-18 07:09:06,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:06,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 07:09:06,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:06,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 07:09:06,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 07:09:06,775 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 07:09:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:07,357 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-01-18 07:09:07,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 07:09:07,358 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-01-18 07:09:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:07,362 INFO L225 Difference]: With dead ends: 2408 [2022-01-18 07:09:07,362 INFO L226 Difference]: Without dead ends: 2404 [2022-01-18 07:09:07,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 07:09:07,386 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 264 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:07,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 165 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:09:07,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-01-18 07:09:07,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-01-18 07:09:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states 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 07:09:07,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-01-18 07:09:07,424 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-01-18 07:09:07,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:07,425 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-01-18 07:09:07,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 07:09:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-01-18 07:09:07,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:07,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:07,427 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:07,449 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 07:09:07,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:07,643 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:07,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:07,643 INFO L85 PathProgramCache]: Analyzing trace with hash 287738009, now seen corresponding path program 16 times [2022-01-18 07:09:07,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:07,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329717988] [2022-01-18 07:09:07,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:07,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:07,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:07,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329717988] [2022-01-18 07:09:07,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329717988] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:07,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724751674] [2022-01-18 07:09:07,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:09:07,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:07,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:07,690 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 07:09:07,691 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 07:09:07,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:09:07,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:07,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:07,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:07,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:07,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724751674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:07,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:07,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 07:09:07,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132717633] [2022-01-18 07:09:07,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:07,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 07:09:07,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:07,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 07:09:07,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:09:07,892 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 07:09:08,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:08,694 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-01-18 07:09:08,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 07:09:08,695 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:08,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:08,702 INFO L225 Difference]: With dead ends: 3509 [2022-01-18 07:09:08,702 INFO L226 Difference]: Without dead ends: 3509 [2022-01-18 07:09:08,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 07:09:08,703 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 427 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:08,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 278 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:09:08,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-01-18 07:09:08,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-01-18 07:09:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states 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 07:09:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-01-18 07:09:08,748 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-01-18 07:09:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:08,749 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-01-18 07:09:08,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 07:09:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-01-18 07:09:08,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:08,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:08,751 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:08,781 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 07:09:08,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:08,967 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:08,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:08,967 INFO L85 PathProgramCache]: Analyzing trace with hash -767639385, now seen corresponding path program 17 times [2022-01-18 07:09:08,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:08,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092283587] [2022-01-18 07:09:08,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:08,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:08,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:08,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092283587] [2022-01-18 07:09:08,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092283587] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:08,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230036237] [2022-01-18 07:09:08,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:09:08,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:08,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:09,000 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 07:09:09,003 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 07:09:09,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 07:09:09,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:09,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:09,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:09,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:09,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230036237] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:09,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:09,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 07:09:09,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157889582] [2022-01-18 07:09:09,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:09,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 07:09:09,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:09,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 07:09:09,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:09:09,219 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 07:09:10,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:10,463 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-01-18 07:09:10,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 07:09:10,463 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:10,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:10,483 INFO L225 Difference]: With dead ends: 3211 [2022-01-18 07:09:10,483 INFO L226 Difference]: Without dead ends: 3207 [2022-01-18 07:09:10,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 07:09:10,485 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 421 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:10,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 288 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 07:09:10,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-01-18 07:09:10,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-01-18 07:09:10,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states 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 07:09:10,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-01-18 07:09:10,512 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-01-18 07:09:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:10,512 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-01-18 07:09:10,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 07:09:10,513 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-01-18 07:09:10,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:10,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:10,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:10,531 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 07:09:10,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:10,731 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:10,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1330941631, now seen corresponding path program 3 times [2022-01-18 07:09:10,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:10,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782200223] [2022-01-18 07:09:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:10,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:09:10,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:10,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782200223] [2022-01-18 07:09:10,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782200223] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:10,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310674632] [2022-01-18 07:09:10,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:09:10,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:10,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:10,768 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 07:09:10,772 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 07:09:10,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 07:09:10,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:10,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 07:09:10,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:09:10,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:09:10,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310674632] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:10,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:10,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-01-18 07:09:10,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647454100] [2022-01-18 07:09:10,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:10,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 07:09:10,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:10,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 07:09:10,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-18 07:09:10,905 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 07:09:11,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:11,022 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-01-18 07:09:11,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 07:09:11,022 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 24 [2022-01-18 07:09:11,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:11,025 INFO L225 Difference]: With dead ends: 1333 [2022-01-18 07:09:11,025 INFO L226 Difference]: Without dead ends: 1333 [2022-01-18 07:09:11,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-01-18 07:09:11,025 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 93 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:11,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 61 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:09:11,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-01-18 07:09:11,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-01-18 07:09:11,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states 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 07:09:11,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-01-18 07:09:11,040 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-01-18 07:09:11,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:11,040 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-01-18 07:09:11,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 07:09:11,041 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-01-18 07:09:11,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:11,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:11,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:11,061 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 07:09:11,258 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,SelfDestructingSolverStorable21 [2022-01-18 07:09:11,258 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:11,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:11,258 INFO L85 PathProgramCache]: Analyzing trace with hash -400741887, now seen corresponding path program 18 times [2022-01-18 07:09:11,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:11,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483964952] [2022-01-18 07:09:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:11,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:11,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:11,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483964952] [2022-01-18 07:09:11,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483964952] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:11,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356460757] [2022-01-18 07:09:11,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:09:11,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:11,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:11,302 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 07:09:11,303 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 07:09:11,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:09:11,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:11,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:11,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:11,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:11,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356460757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:11,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:11,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 07:09:11,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943054622] [2022-01-18 07:09:11,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:11,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 07:09:11,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:11,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 07:09:11,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-18 07:09:11,446 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 07:09:11,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:11,786 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-01-18 07:09:11,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 07:09:11,786 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 24 [2022-01-18 07:09:11,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:11,791 INFO L225 Difference]: With dead ends: 2129 [2022-01-18 07:09:11,791 INFO L226 Difference]: Without dead ends: 2129 [2022-01-18 07:09:11,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 07:09:11,791 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 180 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:11,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 131 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:09:11,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-01-18 07:09:11,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-01-18 07:09:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states 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 07:09:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-01-18 07:09:11,813 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-01-18 07:09:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:11,813 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-01-18 07:09:11,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 07:09:11,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-01-18 07:09:11,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:11,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:11,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:11,837 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 07:09:12,027 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,SelfDestructingSolverStorable22 [2022-01-18 07:09:12,027 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:12,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:12,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1501937565, now seen corresponding path program 19 times [2022-01-18 07:09:12,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:12,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724196034] [2022-01-18 07:09:12,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:12,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:12,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:12,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724196034] [2022-01-18 07:09:12,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724196034] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:12,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120727006] [2022-01-18 07:09:12,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:09:12,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:12,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:12,066 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 07:09:12,067 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 07:09:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:12,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:12,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:12,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:12,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120727006] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:12,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:12,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 07:09:12,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928299381] [2022-01-18 07:09:12,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:12,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 07:09:12,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:12,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 07:09:12,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 07:09:12,194 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 07:09:12,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:12,525 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-01-18 07:09:12,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 07:09:12,525 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-01-18 07:09:12,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:12,529 INFO L225 Difference]: With dead ends: 2262 [2022-01-18 07:09:12,529 INFO L226 Difference]: Without dead ends: 2262 [2022-01-18 07:09:12,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 07:09:12,529 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 184 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:12,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 115 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:09:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-01-18 07:09:12,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-01-18 07:09:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states 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 07:09:12,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-01-18 07:09:12,551 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-01-18 07:09:12,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:12,551 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-01-18 07:09:12,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 07:09:12,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-01-18 07:09:12,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:12,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:12,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:12,568 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 07:09:12,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:12,768 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:12,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:12,768 INFO L85 PathProgramCache]: Analyzing trace with hash 418914909, now seen corresponding path program 20 times [2022-01-18 07:09:12,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:12,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356510911] [2022-01-18 07:09:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:12,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:12,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:12,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356510911] [2022-01-18 07:09:12,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356510911] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:12,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570791206] [2022-01-18 07:09:12,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:09:12,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:12,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:12,812 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 07:09:12,813 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 07:09:12,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:09:12,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:12,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:12,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:12,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:09:12,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570791206] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:12,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:12,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-01-18 07:09:12,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275390069] [2022-01-18 07:09:12,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:12,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 07:09:12,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:12,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 07:09:12,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-18 07:09:12,973 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:13,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:13,202 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-01-18 07:09:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 07:09:13,202 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:13,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:13,205 INFO L225 Difference]: With dead ends: 1474 [2022-01-18 07:09:13,205 INFO L226 Difference]: Without dead ends: 1464 [2022-01-18 07:09:13,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-01-18 07:09:13,206 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 172 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:13,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 90 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:09:13,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-01-18 07:09:13,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-01-18 07:09:13,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states 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 07:09:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-01-18 07:09:13,222 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-01-18 07:09:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:13,222 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-01-18 07:09:13,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:13,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-01-18 07:09:13,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:13,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:13,225 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:13,240 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 07:09:13,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:13,440 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:13,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:13,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1846909987, now seen corresponding path program 21 times [2022-01-18 07:09:13,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:13,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201551009] [2022-01-18 07:09:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:13,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:09:13,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:13,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201551009] [2022-01-18 07:09:13,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201551009] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:13,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581663016] [2022-01-18 07:09:13,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:09:13,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:13,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:13,472 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 07:09:13,473 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 07:09:13,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:09:13,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:13,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:13,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:09:13,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:09:13,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581663016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:13,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:13,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 07:09:13,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767301591] [2022-01-18 07:09:13,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:13,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 07:09:13,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:13,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 07:09:13,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 07:09:13,607 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 07:09:13,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:13,871 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-01-18 07:09:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 07:09:13,871 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-01-18 07:09:13,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:13,875 INFO L225 Difference]: With dead ends: 2318 [2022-01-18 07:09:13,875 INFO L226 Difference]: Without dead ends: 2314 [2022-01-18 07:09:13,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-01-18 07:09:13,875 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 220 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:13,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 99 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:09:13,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-01-18 07:09:13,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-01-18 07:09:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states 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 07:09:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-01-18 07:09:13,896 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-01-18 07:09:13,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:13,896 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-01-18 07:09:13,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 07:09:13,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-01-18 07:09:13,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:13,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:13,898 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:13,914 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 07:09:14,113 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,SelfDestructingSolverStorable25 [2022-01-18 07:09:14,113 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:14,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:14,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1526355169, now seen corresponding path program 22 times [2022-01-18 07:09:14,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:14,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320399561] [2022-01-18 07:09:14,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:14,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:14,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:14,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320399561] [2022-01-18 07:09:14,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320399561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:14,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175003960] [2022-01-18 07:09:14,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:09:14,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:14,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:14,150 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 07:09:14,151 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 07:09:14,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:09:14,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:14,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:14,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:14,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:14,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175003960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:14,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:14,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 07:09:14,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157114962] [2022-01-18 07:09:14,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:14,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 07:09:14,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:14,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 07:09:14,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 07:09:14,286 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 07:09:14,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:14,582 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-01-18 07:09:14,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 07:09:14,582 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 24 [2022-01-18 07:09:14,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:14,586 INFO L225 Difference]: With dead ends: 2302 [2022-01-18 07:09:14,586 INFO L226 Difference]: Without dead ends: 2290 [2022-01-18 07:09:14,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-01-18 07:09:14,587 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:14,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 124 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:09:14,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-01-18 07:09:14,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-01-18 07:09:14,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states 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 07:09:14,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-01-18 07:09:14,607 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-01-18 07:09:14,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:14,607 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-01-18 07:09:14,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 07:09:14,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-01-18 07:09:14,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:14,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:14,609 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:14,625 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 07:09:14,824 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,SelfDestructingSolverStorable26 [2022-01-18 07:09:14,825 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:14,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1528032797, now seen corresponding path program 23 times [2022-01-18 07:09:14,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:14,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080464932] [2022-01-18 07:09:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:14,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:14,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:14,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080464932] [2022-01-18 07:09:14,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080464932] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:14,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431856514] [2022-01-18 07:09:14,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:09:14,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:14,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:14,865 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 07:09:14,866 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 07:09:14,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:09:14,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:14,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:14,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:14,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:09:15,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431856514] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:15,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:15,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 07:09:15,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236391584] [2022-01-18 07:09:15,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:15,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 07:09:15,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:15,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 07:09:15,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:09:15,071 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:15,805 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-01-18 07:09:15,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 07:09:15,805 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:15,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:15,812 INFO L225 Difference]: With dead ends: 4760 [2022-01-18 07:09:15,812 INFO L226 Difference]: Without dead ends: 4760 [2022-01-18 07:09:15,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 07:09:15,814 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 316 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:15,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 262 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:09:15,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-01-18 07:09:15,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-01-18 07:09:15,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states 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 07:09:15,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-01-18 07:09:15,850 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-01-18 07:09:15,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:15,850 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-01-18 07:09:15,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-01-18 07:09:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:15,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:15,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:15,868 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 07:09:16,068 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,SelfDestructingSolverStorable27 [2022-01-18 07:09:16,068 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:16,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:16,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1238029855, now seen corresponding path program 24 times [2022-01-18 07:09:16,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:16,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945021264] [2022-01-18 07:09:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:16,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:16,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:16,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945021264] [2022-01-18 07:09:16,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945021264] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:16,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836006535] [2022-01-18 07:09:16,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:09:16,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:16,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:16,128 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 07:09:16,163 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 07:09:16,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:09:16,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:16,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:16,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:16,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:09:16,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836006535] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:16,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:16,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 07:09:16,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399599516] [2022-01-18 07:09:16,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:16,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 07:09:16,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:16,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 07:09:16,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:09:16,358 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:16,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:16,996 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-01-18 07:09:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 07:09:16,996 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:16,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:17,003 INFO L225 Difference]: With dead ends: 4260 [2022-01-18 07:09:17,003 INFO L226 Difference]: Without dead ends: 4260 [2022-01-18 07:09:17,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 07:09:17,008 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 478 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:17,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 173 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:09:17,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-01-18 07:09:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-01-18 07:09:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states 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 07:09:17,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-01-18 07:09:17,082 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-01-18 07:09:17,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:17,082 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-01-18 07:09:17,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:17,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-01-18 07:09:17,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:17,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:17,085 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:17,151 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 07:09:17,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 07:09:17,285 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:17,285 INFO L85 PathProgramCache]: Analyzing trace with hash 922639019, now seen corresponding path program 25 times [2022-01-18 07:09:17,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:17,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672417512] [2022-01-18 07:09:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:17,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:17,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:17,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672417512] [2022-01-18 07:09:17,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672417512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:17,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526362274] [2022-01-18 07:09:17,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:09:17,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:17,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:17,330 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 07:09:17,331 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 07:09:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:17,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:17,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:17,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:17,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526362274] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:17,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:17,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 07:09:17,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592775935] [2022-01-18 07:09:17,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:17,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 07:09:17,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:17,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 07:09:17,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 07:09:17,471 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 07:09:18,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:18,030 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-01-18 07:09:18,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 07:09:18,031 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:18,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:18,040 INFO L225 Difference]: With dead ends: 4602 [2022-01-18 07:09:18,040 INFO L226 Difference]: Without dead ends: 4602 [2022-01-18 07:09:18,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 07:09:18,041 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 344 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:18,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 199 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:09:18,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-01-18 07:09:18,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-01-18 07:09:18,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states 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 07:09:18,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-01-18 07:09:18,092 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-01-18 07:09:18,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:18,092 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-01-18 07:09:18,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 07:09:18,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-01-18 07:09:18,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:18,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:18,095 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:18,127 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 07:09:18,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:18,318 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:18,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:18,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1994955993, now seen corresponding path program 26 times [2022-01-18 07:09:18,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:18,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044770085] [2022-01-18 07:09:18,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:18,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:18,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:18,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:18,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044770085] [2022-01-18 07:09:18,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044770085] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:18,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883849872] [2022-01-18 07:09:18,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:09:18,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:18,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:18,351 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 07:09:18,352 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 07:09:18,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:09:18,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:18,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:18,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:18,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:18,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883849872] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:18,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:18,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 07:09:18,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362280387] [2022-01-18 07:09:18,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:18,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 07:09:18,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:18,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 07:09:18,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 07:09:18,489 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 07:09:18,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:18,942 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-01-18 07:09:18,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 07:09:18,942 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:18,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:18,952 INFO L225 Difference]: With dead ends: 4348 [2022-01-18 07:09:18,952 INFO L226 Difference]: Without dead ends: 4344 [2022-01-18 07:09:18,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 07:09:18,953 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 380 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:18,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 175 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:09:18,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-01-18 07:09:18,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-01-18 07:09:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states 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 07:09:19,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-18 07:09:19,004 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-18 07:09:19,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:19,005 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-18 07:09:19,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 07:09:19,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-18 07:09:19,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:19,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:19,008 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:19,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 07:09:19,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:19,209 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:19,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:19,209 INFO L85 PathProgramCache]: Analyzing trace with hash -10861731, now seen corresponding path program 27 times [2022-01-18 07:09:19,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:19,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188522938] [2022-01-18 07:09:19,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:19,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:19,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:19,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188522938] [2022-01-18 07:09:19,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188522938] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:19,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936866165] [2022-01-18 07:09:19,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:09:19,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:19,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:19,297 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 07:09:19,298 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 07:09:19,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:09:19,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:19,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:19,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:19,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:09:19,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936866165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:19,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:19,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 07:09:19,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514745023] [2022-01-18 07:09:19,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:19,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 07:09:19,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:19,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 07:09:19,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:09:19,471 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 07:09:19,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:19,946 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-01-18 07:09:19,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 07:09:19,946 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:19,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:19,955 INFO L225 Difference]: With dead ends: 4035 [2022-01-18 07:09:19,955 INFO L226 Difference]: Without dead ends: 4035 [2022-01-18 07:09:19,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 07:09:19,956 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 380 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:19,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 225 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:09:19,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-01-18 07:09:20,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-01-18 07:09:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states 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 07:09:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-01-18 07:09:20,012 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-01-18 07:09:20,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:20,012 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-01-18 07:09:20,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 07:09:20,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-01-18 07:09:20,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:20,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:20,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:20,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 07:09:20,227 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,SelfDestructingSolverStorable31 [2022-01-18 07:09:20,227 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:20,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:20,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1066239125, now seen corresponding path program 28 times [2022-01-18 07:09:20,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:20,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531097555] [2022-01-18 07:09:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:20,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:20,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:20,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531097555] [2022-01-18 07:09:20,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531097555] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:20,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886428792] [2022-01-18 07:09:20,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:09:20,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:20,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:20,267 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 07:09:20,269 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 07:09:20,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:09:20,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:20,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:20,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:20,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:09:20,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886428792] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:20,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:20,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 07:09:20,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312627001] [2022-01-18 07:09:20,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:20,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 07:09:20,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:20,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 07:09:20,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:09:20,465 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 07:09:21,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:21,215 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-01-18 07:09:21,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 07:09:21,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:21,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:21,221 INFO L225 Difference]: With dead ends: 3794 [2022-01-18 07:09:21,221 INFO L226 Difference]: Without dead ends: 3790 [2022-01-18 07:09:21,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 07:09:21,222 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 386 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:21,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 172 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:09:21,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-01-18 07:09:21,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-01-18 07:09:21,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states 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 07:09:21,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-18 07:09:21,253 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-18 07:09:21,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:21,253 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-18 07:09:21,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 07:09:21,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-18 07:09:21,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:21,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:21,255 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:21,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-18 07:09:21,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:21,470 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:21,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:21,471 INFO L85 PathProgramCache]: Analyzing trace with hash 286172165, now seen corresponding path program 29 times [2022-01-18 07:09:21,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:21,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326291262] [2022-01-18 07:09:21,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:21,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:21,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:21,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326291262] [2022-01-18 07:09:21,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326291262] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:21,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986167235] [2022-01-18 07:09:21,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:09:21,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:21,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:21,508 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 07:09:21,509 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 07:09:21,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:09:21,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:21,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:21,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:21,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:21,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986167235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:21,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:21,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 07:09:21,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977741645] [2022-01-18 07:09:21,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:21,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 07:09:21,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:21,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 07:09:21,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 07:09:21,667 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:22,318 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-01-18 07:09:22,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 07:09:22,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:22,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:22,325 INFO L225 Difference]: With dead ends: 3978 [2022-01-18 07:09:22,325 INFO L226 Difference]: Without dead ends: 3978 [2022-01-18 07:09:22,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 07:09:22,326 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 214 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:22,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 186 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:09:22,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-01-18 07:09:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-01-18 07:09:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states 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 07:09:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-01-18 07:09:22,358 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-01-18 07:09:22,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:22,358 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-01-18 07:09:22,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:22,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-01-18 07:09:22,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:22,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:22,361 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:22,378 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 07:09:22,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:22,565 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:22,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:22,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1358489139, now seen corresponding path program 30 times [2022-01-18 07:09:22,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:22,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692506345] [2022-01-18 07:09:22,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:22,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:22,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:22,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:22,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692506345] [2022-01-18 07:09:22,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692506345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:22,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93370055] [2022-01-18 07:09:22,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:09:22,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:22,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:22,623 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 07:09:22,624 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 07:09:22,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:09:22,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:22,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:22,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:22,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:22,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93370055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:22,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:22,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 07:09:22,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086986471] [2022-01-18 07:09:22,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:22,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 07:09:22,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:22,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 07:09:22,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 07:09:22,737 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:23,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:23,154 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-01-18 07:09:23,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 07:09:23,155 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:23,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:23,160 INFO L225 Difference]: With dead ends: 3706 [2022-01-18 07:09:23,160 INFO L226 Difference]: Without dead ends: 3702 [2022-01-18 07:09:23,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 07:09:23,161 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 227 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:23,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 152 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:09:23,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-01-18 07:09:23,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-01-18 07:09:23,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states 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 07:09:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-01-18 07:09:23,193 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-01-18 07:09:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:23,193 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-01-18 07:09:23,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:23,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-01-18 07:09:23,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:23,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:23,195 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:23,211 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 07:09:23,410 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,SelfDestructingSolverStorable34 [2022-01-18 07:09:23,411 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:23,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:23,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1675641631, now seen corresponding path program 31 times [2022-01-18 07:09:23,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:23,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120923202] [2022-01-18 07:09:23,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:23,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:23,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:23,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120923202] [2022-01-18 07:09:23,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120923202] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:23,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274452712] [2022-01-18 07:09:23,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:09:23,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:23,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:23,445 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 07:09:23,446 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 07:09:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:23,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:23,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:23,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:23,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274452712] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:23,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:23,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 07:09:23,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722996117] [2022-01-18 07:09:23,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:23,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 07:09:23,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:23,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 07:09:23,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-18 07:09:23,590 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:24,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:24,135 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-01-18 07:09:24,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 07:09:24,135 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:24,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:24,141 INFO L225 Difference]: With dead ends: 4114 [2022-01-18 07:09:24,141 INFO L226 Difference]: Without dead ends: 4102 [2022-01-18 07:09:24,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 07:09:24,142 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 333 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:24,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 169 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:09:24,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-01-18 07:09:24,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-01-18 07:09:24,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states 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 07:09:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-01-18 07:09:24,176 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-01-18 07:09:24,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:24,176 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-01-18 07:09:24,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:24,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-01-18 07:09:24,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:24,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:24,179 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:24,196 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 07:09:24,394 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,SelfDestructingSolverStorable35 [2022-01-18 07:09:24,394 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:24,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:24,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1003355295, now seen corresponding path program 32 times [2022-01-18 07:09:24,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:24,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890061144] [2022-01-18 07:09:24,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:24,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:24,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:24,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890061144] [2022-01-18 07:09:24,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890061144] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:24,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284117074] [2022-01-18 07:09:24,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:09:24,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:24,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:24,456 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 07:09:24,456 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 07:09:24,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:09:24,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:24,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:24,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:24,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:24,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284117074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:24,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:24,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 07:09:24,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185575184] [2022-01-18 07:09:24,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:24,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 07:09:24,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:24,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 07:09:24,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-01-18 07:09:24,673 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 07:09:25,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:25,335 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-01-18 07:09:25,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 07:09:25,335 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:25,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:25,340 INFO L225 Difference]: With dead ends: 3694 [2022-01-18 07:09:25,341 INFO L226 Difference]: Without dead ends: 3694 [2022-01-18 07:09:25,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 07:09:25,341 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 349 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:25,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 269 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:09:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-01-18 07:09:25,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-01-18 07:09:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states 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 07:09:25,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-01-18 07:09:25,375 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-01-18 07:09:25,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:25,376 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-01-18 07:09:25,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 07:09:25,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-01-18 07:09:25,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:25,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:25,378 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:25,396 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 07:09:25,589 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,SelfDestructingSolverStorable36 [2022-01-18 07:09:25,589 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:25,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:25,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2058732689, now seen corresponding path program 33 times [2022-01-18 07:09:25,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:25,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786384839] [2022-01-18 07:09:25,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:25,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:25,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:25,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786384839] [2022-01-18 07:09:25,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786384839] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:25,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225666689] [2022-01-18 07:09:25,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:09:25,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:25,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:25,640 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 07:09:25,640 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 07:09:25,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:09:25,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:25,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:25,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:25,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:25,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225666689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:25,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:25,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 07:09:25,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771300707] [2022-01-18 07:09:25,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:25,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 07:09:25,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:25,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 07:09:25,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-01-18 07:09:25,861 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 07:09:26,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:26,636 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-01-18 07:09:26,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 07:09:26,637 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:26,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:26,642 INFO L225 Difference]: With dead ends: 3420 [2022-01-18 07:09:26,642 INFO L226 Difference]: Without dead ends: 3416 [2022-01-18 07:09:26,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 07:09:26,643 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 355 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:26,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 205 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:09:26,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-01-18 07:09:26,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-01-18 07:09:26,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states 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 07:09:26,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-01-18 07:09:26,675 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-01-18 07:09:26,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:26,675 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-01-18 07:09:26,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 07:09:26,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-01-18 07:09:26,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:09:26,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:26,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:26,695 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 07:09:26,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:26,891 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:26,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:26,891 INFO L85 PathProgramCache]: Analyzing trace with hash -575597751, now seen corresponding path program 34 times [2022-01-18 07:09:26,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:26,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359061416] [2022-01-18 07:09:26,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:26,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:26,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:26,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359061416] [2022-01-18 07:09:26,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359061416] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:26,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290152019] [2022-01-18 07:09:26,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:09:26,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:26,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:26,934 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 07:09:26,935 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 07:09:26,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:09:26,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:26,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:09:26,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:27,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:27,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290152019] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:09:27,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:09:27,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 07:09:27,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046398494] [2022-01-18 07:09:27,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:09:27,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 07:09:27,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:09:27,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 07:09:27,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-18 07:09:27,106 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:27,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:09:27,733 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-01-18 07:09:27,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 07:09:27,733 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 07:09:27,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:09:27,738 INFO L225 Difference]: With dead ends: 3256 [2022-01-18 07:09:27,738 INFO L226 Difference]: Without dead ends: 3244 [2022-01-18 07:09:27,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 07:09:27,739 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 242 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:09:27,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 197 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:09:27,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-01-18 07:09:27,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-01-18 07:09:27,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states 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 07:09:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-01-18 07:09:27,769 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-01-18 07:09:27,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:09:27,769 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-01-18 07:09:27,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:09:27,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-01-18 07:09:27,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:09:27,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:09:27,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:09:27,789 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 07:09:27,987 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,SelfDestructingSolverStorable38 [2022-01-18 07:09:27,987 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:09:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:09:27,987 INFO L85 PathProgramCache]: Analyzing trace with hash 201587259, now seen corresponding path program 4 times [2022-01-18 07:09:27,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:09:27,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371355546] [2022-01-18 07:09:27,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:09:27,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:09:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:09:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:28,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:09:28,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371355546] [2022-01-18 07:09:28,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371355546] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:09:28,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289328940] [2022-01-18 07:09:28,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:09:28,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:09:28,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:09:28,717 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 07:09:28,718 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 07:09:28,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:09:28,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:09:28,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 07:09:28,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:09:29,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:09:29,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:09:29,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 84 [2022-01-18 07:09:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:09:29,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:09:30,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:09:30,666 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:09:30,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 295 treesize of output 245 [2022-01-18 07:10:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:10:16,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289328940] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:10:16,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:10:16,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 07:10:16,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584778966] [2022-01-18 07:10:16,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:10:16,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:10:16,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:10:16,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:10:16,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:10:16,417 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 07:10:23,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:10:23,144 INFO L93 Difference]: Finished difference Result 3711 states and 11925 transitions. [2022-01-18 07:10:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 07:10:23,144 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:10:23,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:10:23,152 INFO L225 Difference]: With dead ends: 3711 [2022-01-18 07:10:23,152 INFO L226 Difference]: Without dead ends: 3651 [2022-01-18 07:10:23,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=796, Invalid=3494, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 07:10:23,153 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 516 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:10:23,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 248 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1079 Invalid, 0 Unknown, 82 Unchecked, 1.0s Time] [2022-01-18 07:10:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2022-01-18 07:10:23,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 1749. [2022-01-18 07:10:23,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.5720823798627004) internal successors, (6244), 1748 states have internal predecessors, (6244), 0 states have call successors, (0), 0 states 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 07:10:23,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 6244 transitions. [2022-01-18 07:10:23,199 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 6244 transitions. Word has length 26 [2022-01-18 07:10:23,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:10:23,199 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 6244 transitions. [2022-01-18 07:10:23,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 07:10:23,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 6244 transitions. [2022-01-18 07:10:23,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:10:23,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:10:23,203 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:10:23,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 07:10:23,426 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,SelfDestructingSolverStorable39 [2022-01-18 07:10:23,426 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:10:23,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:10:23,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1826810757, now seen corresponding path program 5 times [2022-01-18 07:10:23,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:10:23,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858459872] [2022-01-18 07:10:23,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:10:23,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:10:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:10:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:10:24,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:10:24,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858459872] [2022-01-18 07:10:24,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858459872] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:10:24,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931240892] [2022-01-18 07:10:24,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:10:24,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:10:24,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:10:24,498 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 07:10:24,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 07:10:24,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:10:24,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:10:24,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 07:10:24,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:10:25,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:10:25,414 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-01-18 07:10:25,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 205 treesize of output 116 [2022-01-18 07:10:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:10:25,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:10:26,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:10:26,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:10:26,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 295 treesize of output 245 [2022-01-18 07:10:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:10:55,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931240892] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:10:55,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:10:55,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 07:10:55,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454498191] [2022-01-18 07:10:55,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:10:55,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:10:55,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:10:55,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:10:55,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:10:55,266 INFO L87 Difference]: Start difference. First operand 1749 states and 6244 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:11:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:11:01,841 INFO L93 Difference]: Finished difference Result 3933 states and 12668 transitions. [2022-01-18 07:11:01,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 07:11:01,842 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:11:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:11:01,848 INFO L225 Difference]: With dead ends: 3933 [2022-01-18 07:11:01,848 INFO L226 Difference]: Without dead ends: 3903 [2022-01-18 07:11:01,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=828, Invalid=3594, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 07:11:01,852 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 523 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:11:01,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 313 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1339 Invalid, 0 Unknown, 61 Unchecked, 1.0s Time] [2022-01-18 07:11:01,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2022-01-18 07:11:01,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 1825. [2022-01-18 07:11:01,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1824 states have (on average 3.5822368421052633) internal successors, (6534), 1824 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states 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 07:11:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 6534 transitions. [2022-01-18 07:11:01,887 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 6534 transitions. Word has length 26 [2022-01-18 07:11:01,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:11:01,887 INFO L470 AbstractCegarLoop]: Abstraction has 1825 states and 6534 transitions. [2022-01-18 07:11:01,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:11:01,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 6534 transitions. [2022-01-18 07:11:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:11:01,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:11:01,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:11:01,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 07:11:02,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:11:02,107 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:11:02,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:11:02,108 INFO L85 PathProgramCache]: Analyzing trace with hash -235381449, now seen corresponding path program 35 times [2022-01-18 07:11:02,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:11:02,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605694041] [2022-01-18 07:11:02,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:11:02,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:11:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:11:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:11:02,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:11:02,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605694041] [2022-01-18 07:11:02,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605694041] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:11:02,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789687827] [2022-01-18 07:11:02,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:11:02,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:11:02,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:11:02,671 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 07:11:02,671 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 07:11:02,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:11:02,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:11:02,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 07:11:02,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:11:03,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:11:03,331 INFO L353 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2022-01-18 07:11:03,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 367 treesize of output 163 [2022-01-18 07:11:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:11:03,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:11:04,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:11:04,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:11:04,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:11:04,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:11:04,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 359 treesize of output 243 [2022-01-18 07:11:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:11:06,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789687827] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:11:06,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:11:06,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 28 [2022-01-18 07:11:06,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367525374] [2022-01-18 07:11:06,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:11:06,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 07:11:06,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:11:06,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 07:11:06,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-01-18 07:11:06,159 INFO L87 Difference]: Start difference. First operand 1825 states and 6534 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:11:15,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:11:15,068 INFO L93 Difference]: Finished difference Result 3811 states and 12266 transitions. [2022-01-18 07:11:15,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 07:11:15,068 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:11:15,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:11:15,075 INFO L225 Difference]: With dead ends: 3811 [2022-01-18 07:11:15,075 INFO L226 Difference]: Without dead ends: 3766 [2022-01-18 07:11:15,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1913 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=860, Invalid=5782, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 07:11:15,083 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 442 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 2385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:11:15,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 485 Invalid, 2385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2109 Invalid, 0 Unknown, 195 Unchecked, 1.5s Time] [2022-01-18 07:11:15,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2022-01-18 07:11:15,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 2078. [2022-01-18 07:11:15,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2077 states have (on average 3.5185363505055367) internal successors, (7308), 2077 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states 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 07:11:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 7308 transitions. [2022-01-18 07:11:15,143 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 7308 transitions. Word has length 26 [2022-01-18 07:11:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:11:15,143 INFO L470 AbstractCegarLoop]: Abstraction has 2078 states and 7308 transitions. [2022-01-18 07:11:15,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:11:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 7308 transitions. [2022-01-18 07:11:15,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:11:15,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:11:15,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:11:15,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 07:11:15,361 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,SelfDestructingSolverStorable41 [2022-01-18 07:11:15,362 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:11:15,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:11:15,362 INFO L85 PathProgramCache]: Analyzing trace with hash 569665727, now seen corresponding path program 6 times [2022-01-18 07:11:15,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:11:15,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612048748] [2022-01-18 07:11:15,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:11:15,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:11:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:11:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:11:16,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:11:16,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612048748] [2022-01-18 07:11:16,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612048748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:11:16,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838124659] [2022-01-18 07:11:16,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:11:16,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:11:16,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:11:16,171 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 07:11:16,172 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 07:11:16,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:11:16,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:11:16,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 07:11:16,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:11:16,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:11:16,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:11:16,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 84 [2022-01-18 07:11:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:11:17,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:11:18,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:11:18,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:11:18,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 297 treesize of output 247 [2022-01-18 07:11:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:11:59,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838124659] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:11:59,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:11:59,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 07:11:59,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597553979] [2022-01-18 07:11:59,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:11:59,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 07:11:59,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:11:59,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 07:11:59,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-01-18 07:11:59,484 INFO L87 Difference]: Start difference. First operand 2078 states and 7308 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:12:05,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:12:05,637 INFO L93 Difference]: Finished difference Result 3852 states and 12395 transitions. [2022-01-18 07:12:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 07:12:05,637 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:12:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:12:05,647 INFO L225 Difference]: With dead ends: 3852 [2022-01-18 07:12:05,647 INFO L226 Difference]: Without dead ends: 3822 [2022-01-18 07:12:05,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=580, Invalid=2612, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 07:12:05,649 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 427 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 510 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 07:12:05,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 352 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1079 Invalid, 0 Unknown, 510 Unchecked, 0.9s Time] [2022-01-18 07:12:05,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2022-01-18 07:12:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 2123. [2022-01-18 07:12:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 3.5089538171536288) internal successors, (7446), 2122 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states 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 07:12:05,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 7446 transitions. [2022-01-18 07:12:05,684 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 7446 transitions. Word has length 26 [2022-01-18 07:12:05,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:12:05,686 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 7446 transitions. [2022-01-18 07:12:05,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:12:05,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 7446 transitions. [2022-01-18 07:12:05,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:12:05,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:12:05,689 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:12:05,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 07:12:05,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:12:05,899 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:12:05,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:12:05,899 INFO L85 PathProgramCache]: Analyzing trace with hash -941338781, now seen corresponding path program 7 times [2022-01-18 07:12:05,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:12:05,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788582584] [2022-01-18 07:12:05,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:12:05,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:12:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:12:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:12:06,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:12:06,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788582584] [2022-01-18 07:12:06,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788582584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:12:06,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690128368] [2022-01-18 07:12:06,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:12:06,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:12:06,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:12:06,589 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 07:12:06,590 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 07:12:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:12:06,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 07:12:06,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:12:07,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:12:07,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:12:07,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 84 [2022-01-18 07:12:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:12:07,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:12:08,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:12:08,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:12:08,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 295 treesize of output 245 [2022-01-18 07:12:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:12:31,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690128368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:12:31,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:12:31,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 07:12:31,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556948777] [2022-01-18 07:12:31,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:12:31,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:12:31,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:12:31,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:12:31,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:12:31,159 INFO L87 Difference]: Start difference. First operand 2123 states and 7446 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 07:12:36,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:12:36,921 INFO L93 Difference]: Finished difference Result 4333 states and 13845 transitions. [2022-01-18 07:12:36,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 07:12:36,922 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:12:36,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:12:36,929 INFO L225 Difference]: With dead ends: 4333 [2022-01-18 07:12:36,929 INFO L226 Difference]: Without dead ends: 4273 [2022-01-18 07:12:36,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=713, Invalid=3069, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 07:12:36,931 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 407 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:12:36,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 308 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 07:12:36,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4273 states. [2022-01-18 07:12:36,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4273 to 2151. [2022-01-18 07:12:36,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2150 states have (on average 3.5051162790697674) internal successors, (7536), 2150 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states 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 07:12:36,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 7536 transitions. [2022-01-18 07:12:36,986 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 7536 transitions. Word has length 26 [2022-01-18 07:12:36,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:12:36,986 INFO L470 AbstractCegarLoop]: Abstraction has 2151 states and 7536 transitions. [2022-01-18 07:12:36,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 07:12:36,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 7536 transitions. [2022-01-18 07:12:36,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:12:36,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:12:36,990 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:12:37,021 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 07:12:37,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:12:37,205 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:12:37,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:12:37,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1325230499, now seen corresponding path program 8 times [2022-01-18 07:12:37,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:12:37,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393772197] [2022-01-18 07:12:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:12:37,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:12:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:12:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:12:38,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:12:38,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393772197] [2022-01-18 07:12:38,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393772197] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:12:38,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281179522] [2022-01-18 07:12:38,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:12:38,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:12:38,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:12:38,093 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 07:12:38,094 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 07:12:38,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:12:38,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:12:38,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 07:12:38,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:12:38,768 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 07:12:38,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 245 treesize of output 136 [2022-01-18 07:12:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:12:39,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:12:40,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:12:40,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:12:40,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:12:40,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 295 treesize of output 237 [2022-01-18 07:13:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:13:14,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281179522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:13:14,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:13:14,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 07:13:14,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054248203] [2022-01-18 07:13:14,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:13:14,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 07:13:14,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:13:14,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 07:13:14,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-01-18 07:13:14,969 INFO L87 Difference]: Start difference. First operand 2151 states and 7536 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 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 07:13:27,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:13:27,143 INFO L93 Difference]: Finished difference Result 4496 states and 14868 transitions. [2022-01-18 07:13:27,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 07:13:27,143 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 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) Word has length 26 [2022-01-18 07:13:27,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:13:27,150 INFO L225 Difference]: With dead ends: 4496 [2022-01-18 07:13:27,150 INFO L226 Difference]: Without dead ends: 4466 [2022-01-18 07:13:27,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2297 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=1282, Invalid=5858, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 07:13:27,151 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 486 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 2492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 931 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:13:27,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 604 Invalid, 2492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1485 Invalid, 0 Unknown, 931 Unchecked, 1.2s Time] [2022-01-18 07:13:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4466 states. [2022-01-18 07:13:27,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4466 to 2187. [2022-01-18 07:13:27,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2186 states have (on average 3.515096065873742) internal successors, (7684), 2186 states have internal predecessors, (7684), 0 states have call successors, (0), 0 states 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 07:13:27,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 7684 transitions. [2022-01-18 07:13:27,190 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 7684 transitions. Word has length 26 [2022-01-18 07:13:27,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:13:27,190 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 7684 transitions. [2022-01-18 07:13:27,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 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 07:13:27,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 7684 transitions. [2022-01-18 07:13:27,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:13:27,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:13:27,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:13:27,209 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 07:13:27,404 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,SelfDestructingSolverStorable44 [2022-01-18 07:13:27,404 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:13:27,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:13:27,405 INFO L85 PathProgramCache]: Analyzing trace with hash -612179209, now seen corresponding path program 9 times [2022-01-18 07:13:27,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:13:27,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988682532] [2022-01-18 07:13:27,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:13:27,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:13:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:13:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:13:28,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:13:28,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988682532] [2022-01-18 07:13:28,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988682532] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:13:28,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863937881] [2022-01-18 07:13:28,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:13:28,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:13:28,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:13:28,232 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 07:13:28,233 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 07:13:28,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:13:28,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:13:28,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 07:13:28,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:13:28,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:13:28,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:13:28,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 84 [2022-01-18 07:13:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:13:29,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:13:29,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:13:29,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:13:29,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 295 treesize of output 245 [2022-01-18 07:13:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:13:48,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863937881] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:13:48,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:13:48,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 27 [2022-01-18 07:13:48,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285279440] [2022-01-18 07:13:48,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:13:48,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 07:13:48,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:13:48,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 07:13:48,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-01-18 07:13:48,524 INFO L87 Difference]: Start difference. First operand 2187 states and 7684 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 07:13:59,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:13:59,546 INFO L93 Difference]: Finished difference Result 5136 states and 16323 transitions. [2022-01-18 07:13:59,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 07:13:59,546 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:13:59,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:13:59,555 INFO L225 Difference]: With dead ends: 5136 [2022-01-18 07:13:59,555 INFO L226 Difference]: Without dead ends: 5076 [2022-01-18 07:13:59,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1120, Invalid=4886, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 07:13:59,556 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 619 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:13:59,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 417 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1725 Invalid, 0 Unknown, 1 Unchecked, 1.6s Time] [2022-01-18 07:13:59,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2022-01-18 07:13:59,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 2218. [2022-01-18 07:13:59,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 3.527740189445196) internal successors, (7821), 2217 states have internal predecessors, (7821), 0 states have call successors, (0), 0 states 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 07:13:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 7821 transitions. [2022-01-18 07:13:59,615 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 7821 transitions. Word has length 26 [2022-01-18 07:13:59,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:13:59,615 INFO L470 AbstractCegarLoop]: Abstraction has 2218 states and 7821 transitions. [2022-01-18 07:13:59,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 07:13:59,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 7821 transitions. [2022-01-18 07:13:59,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:13:59,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:13:59,619 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:13:59,635 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 07:13:59,831 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,SelfDestructingSolverStorable45 [2022-01-18 07:13:59,831 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:13:59,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:13:59,832 INFO L85 PathProgramCache]: Analyzing trace with hash -779988301, now seen corresponding path program 10 times [2022-01-18 07:13:59,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:13:59,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591825886] [2022-01-18 07:13:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:13:59,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:13:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:14:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:00,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:14:00,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591825886] [2022-01-18 07:14:00,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591825886] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:14:00,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193266994] [2022-01-18 07:14:00,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:14:00,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:14:00,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:14:00,505 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 07:14:00,506 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 07:14:00,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:14:00,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:14:00,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 07:14:00,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:14:01,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:14:01,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:14:01,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 84 [2022-01-18 07:14:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:01,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:14:02,577 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 07:14:02,577 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 295 treesize of output 245 [2022-01-18 07:14:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:10,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193266994] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:14:10,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:14:10,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 24 [2022-01-18 07:14:10,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126533573] [2022-01-18 07:14:10,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:14:10,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:14:10,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:14:10,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:14:10,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:14:10,254 INFO L87 Difference]: Start difference. First operand 2218 states and 7821 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:14:12,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:14:12,342 INFO L93 Difference]: Finished difference Result 3323 states and 10969 transitions. [2022-01-18 07:14:12,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 07:14:12,343 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:14:12,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:14:12,348 INFO L225 Difference]: With dead ends: 3323 [2022-01-18 07:14:12,348 INFO L226 Difference]: Without dead ends: 3308 [2022-01-18 07:14:12,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 07:14:12,349 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 190 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 07:14:12,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 257 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1027 Invalid, 0 Unknown, 83 Unchecked, 0.7s Time] [2022-01-18 07:14:12,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3308 states. [2022-01-18 07:14:12,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3308 to 2224. [2022-01-18 07:14:12,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 3.5276653171390016) internal successors, (7842), 2223 states have internal predecessors, (7842), 0 states have call successors, (0), 0 states 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 07:14:12,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 7842 transitions. [2022-01-18 07:14:12,383 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 7842 transitions. Word has length 26 [2022-01-18 07:14:12,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:14:12,383 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 7842 transitions. [2022-01-18 07:14:12,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:14:12,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 7842 transitions. [2022-01-18 07:14:12,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:14:12,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:14:12,386 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:14:12,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 07:14:12,598 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,SelfDestructingSolverStorable46 [2022-01-18 07:14:12,598 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:14:12,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:14:12,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1447462967, now seen corresponding path program 11 times [2022-01-18 07:14:12,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:14:12,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045972037] [2022-01-18 07:14:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:14:12,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:14:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:14:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:13,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:14:13,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045972037] [2022-01-18 07:14:13,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045972037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:14:13,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908922122] [2022-01-18 07:14:13,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:14:13,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:14:13,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:14:13,265 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 07:14:13,266 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 07:14:13,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:14:13,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:14:13,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 07:14:13,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:14:13,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:14:13,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:14:13,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 96 [2022-01-18 07:14:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:14,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:14:15,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:14:15,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:14:15,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 319 treesize of output 263 [2022-01-18 07:15:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:20,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908922122] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:15:20,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:15:20,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 07:15:20,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636695662] [2022-01-18 07:15:20,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:15:20,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 07:15:20,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:15:20,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 07:15:20,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 07:15:20,080 INFO L87 Difference]: Start difference. First operand 2224 states and 7842 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:45,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:15:45,865 INFO L93 Difference]: Finished difference Result 5709 states and 18272 transitions. [2022-01-18 07:15:45,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 07:15:45,866 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:15:45,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:15:45,883 INFO L225 Difference]: With dead ends: 5709 [2022-01-18 07:15:45,884 INFO L226 Difference]: Without dead ends: 5635 [2022-01-18 07:15:45,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3705 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=1923, Invalid=9207, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 07:15:45,885 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 695 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 2753 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 3217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:15:45,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 663 Invalid, 3217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 2753 Invalid, 0 Unknown, 307 Unchecked, 2.3s Time] [2022-01-18 07:15:45,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5635 states. [2022-01-18 07:15:45,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5635 to 2294. [2022-01-18 07:15:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2293 states have (on average 3.554295682511993) internal successors, (8150), 2293 states have internal predecessors, (8150), 0 states have call successors, (0), 0 states 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 07:15:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 8150 transitions. [2022-01-18 07:15:45,966 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 8150 transitions. Word has length 26 [2022-01-18 07:15:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:15:45,967 INFO L470 AbstractCegarLoop]: Abstraction has 2294 states and 8150 transitions. [2022-01-18 07:15:45,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 8150 transitions. [2022-01-18 07:15:45,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:15:45,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:15:45,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:15:45,987 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 07:15:46,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:46,172 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:15:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:15:46,172 INFO L85 PathProgramCache]: Analyzing trace with hash 950741607, now seen corresponding path program 12 times [2022-01-18 07:15:46,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:15:46,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441301342] [2022-01-18 07:15:46,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:15:46,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:15:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:15:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:46,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:15:46,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441301342] [2022-01-18 07:15:46,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441301342] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:15:46,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523152220] [2022-01-18 07:15:46,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:15:46,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:46,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:15:46,865 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 07:15:46,866 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 07:15:46,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:15:46,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:15:46,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 07:15:46,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:15:47,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:15:47,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:15:47,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 92 [2022-01-18 07:15:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:47,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:15:48,883 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 07:15:48,883 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 346 treesize of output 284 [2022-01-18 07:16:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:16:11,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523152220] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:16:11,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:16:11,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 07:16:11,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272832217] [2022-01-18 07:16:11,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:16:11,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:16:11,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:16:11,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:16:11,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:16:11,198 INFO L87 Difference]: Start difference. First operand 2294 states and 8150 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:16:26,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:16:26,786 INFO L93 Difference]: Finished difference Result 4837 states and 15745 transitions. [2022-01-18 07:16:26,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 07:16:26,786 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:16:26,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:16:26,793 INFO L225 Difference]: With dead ends: 4837 [2022-01-18 07:16:26,793 INFO L226 Difference]: Without dead ends: 4807 [2022-01-18 07:16:26,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3139 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=1372, Invalid=8134, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 07:16:26,794 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 522 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:16:26,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 467 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2213 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 07:16:26,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2022-01-18 07:16:26,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 2302. [2022-01-18 07:16:26,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 3.5567144719687094) internal successors, (8184), 2301 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states 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 07:16:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 8184 transitions. [2022-01-18 07:16:26,838 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 8184 transitions. Word has length 26 [2022-01-18 07:16:26,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:16:26,838 INFO L470 AbstractCegarLoop]: Abstraction has 2302 states and 8184 transitions. [2022-01-18 07:16:26,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:16:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 8184 transitions. [2022-01-18 07:16:26,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:16:26,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:16:26,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:16:26,859 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 07:16:27,057 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,SelfDestructingSolverStorable48 [2022-01-18 07:16:27,057 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:16:27,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:16:27,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1845411963, now seen corresponding path program 13 times [2022-01-18 07:16:27,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:16:27,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845227086] [2022-01-18 07:16:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:16:27,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:16:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:16:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:16:27,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:16:27,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845227086] [2022-01-18 07:16:27,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845227086] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:16:27,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490753184] [2022-01-18 07:16:27,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:16:27,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:16:27,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:16:27,632 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 07:16:27,633 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 07:16:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:16:27,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 07:16:27,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:16:28,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:16:28,347 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-01-18 07:16:28,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 240 treesize of output 135 [2022-01-18 07:16:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:16:28,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:16:29,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:16:29,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:16:29,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 319 treesize of output 263 [2022-01-18 07:17:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:10,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490753184] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:17:10,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:17:10,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 07:17:10,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665462660] [2022-01-18 07:17:10,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:17:10,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:17:10,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:17:10,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:17:10,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:17:10,657 INFO L87 Difference]: Start difference. First operand 2302 states and 8184 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:17:25,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:17:25,215 INFO L93 Difference]: Finished difference Result 8575 states and 27772 transitions. [2022-01-18 07:17:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 07:17:25,216 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:17:25,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:17:25,232 INFO L225 Difference]: With dead ends: 8575 [2022-01-18 07:17:25,232 INFO L226 Difference]: Without dead ends: 8530 [2022-01-18 07:17:25,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=1324, Invalid=5648, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 07:17:25,233 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 567 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 583 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:17:25,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 465 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1388 Invalid, 0 Unknown, 583 Unchecked, 1.3s Time] [2022-01-18 07:17:25,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8530 states. [2022-01-18 07:17:25,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8530 to 2325. [2022-01-18 07:17:25,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 2324 states have (on average 3.5654044750430294) internal successors, (8286), 2324 states have internal predecessors, (8286), 0 states have call successors, (0), 0 states 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 07:17:25,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 8286 transitions. [2022-01-18 07:17:25,307 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 8286 transitions. Word has length 26 [2022-01-18 07:17:25,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:17:25,308 INFO L470 AbstractCegarLoop]: Abstraction has 2325 states and 8286 transitions. [2022-01-18 07:17:25,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:17:25,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 8286 transitions. [2022-01-18 07:17:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:17:25,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:17:25,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:17:25,327 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 07:17:25,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 07:17:25,521 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:17:25,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:17:25,521 INFO L85 PathProgramCache]: Analyzing trace with hash -899173769, now seen corresponding path program 36 times [2022-01-18 07:17:25,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:17:25,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592423693] [2022-01-18 07:17:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:17:25,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:17:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:17:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:26,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:17:26,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592423693] [2022-01-18 07:17:26,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592423693] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:17:26,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088209673] [2022-01-18 07:17:26,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:17:26,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:17:26,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:17:26,083 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 07:17:26,084 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 07:17:26,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:17:26,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:17:26,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 07:17:26,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:17:27,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:17:27,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:17:27,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:17:27,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 118 [2022-01-18 07:17:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:28,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:17:30,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:17:30,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:17:30,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:17:30,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:17:30,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 359 treesize of output 213 [2022-01-18 07:17:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:31,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088209673] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:17:31,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:17:31,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2022-01-18 07:17:31,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138916042] [2022-01-18 07:17:31,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:17:31,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 07:17:31,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:17:31,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 07:17:31,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-01-18 07:17:31,943 INFO L87 Difference]: Start difference. First operand 2325 states and 8286 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:17:41,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:17:41,780 INFO L93 Difference]: Finished difference Result 4419 states and 14621 transitions. [2022-01-18 07:17:41,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 07:17:41,781 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:17:41,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:17:41,789 INFO L225 Difference]: With dead ends: 4419 [2022-01-18 07:17:41,789 INFO L226 Difference]: Without dead ends: 4398 [2022-01-18 07:17:41,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2135 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1071, Invalid=6238, Unknown=1, NotChecked=0, Total=7310 [2022-01-18 07:17:41,790 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 387 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 3021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1130 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:17:41,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 636 Invalid, 3021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1830 Invalid, 0 Unknown, 1130 Unchecked, 1.3s Time] [2022-01-18 07:17:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4398 states. [2022-01-18 07:17:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4398 to 2432. [2022-01-18 07:17:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 3.5549156725627316) internal successors, (8642), 2431 states have internal predecessors, (8642), 0 states have call successors, (0), 0 states 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 07:17:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 8642 transitions. [2022-01-18 07:17:41,836 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 8642 transitions. Word has length 26 [2022-01-18 07:17:41,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:17:41,836 INFO L470 AbstractCegarLoop]: Abstraction has 2432 states and 8642 transitions. [2022-01-18 07:17:41,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:17:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 8642 transitions. [2022-01-18 07:17:41,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:17:41,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:17:41,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:17:41,859 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 07:17:42,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:17:42,055 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:17:42,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:17:42,056 INFO L85 PathProgramCache]: Analyzing trace with hash -859684957, now seen corresponding path program 14 times [2022-01-18 07:17:42,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:17:42,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770935095] [2022-01-18 07:17:42,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:17:42,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:17:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:17:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:42,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:17:42,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770935095] [2022-01-18 07:17:42,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770935095] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:17:42,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144302267] [2022-01-18 07:17:42,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:17:42,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:17:42,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:17:42,755 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 07:17:42,756 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 07:17:42,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:17:42,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:17:42,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 07:17:42,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:17:43,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:17:43,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:17:43,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 120 treesize of output 100 [2022-01-18 07:17:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:44,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:17:45,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:17:45,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:17:45,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:17:45,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 277 treesize of output 235 [2022-01-18 07:17:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:48,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144302267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:17:48,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:17:48,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-01-18 07:17:48,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888852686] [2022-01-18 07:17:48,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:17:48,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 07:17:48,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:17:48,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 07:17:48,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-01-18 07:17:48,284 INFO L87 Difference]: Start difference. First operand 2432 states and 8642 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 07:18:18,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:18:18,864 INFO L93 Difference]: Finished difference Result 6481 states and 22193 transitions. [2022-01-18 07:18:18,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-18 07:18:18,864 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:18:18,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:18:18,875 INFO L225 Difference]: With dead ends: 6481 [2022-01-18 07:18:18,875 INFO L226 Difference]: Without dead ends: 6451 [2022-01-18 07:18:18,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7873 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=2818, Invalid=17488, Unknown=0, NotChecked=0, Total=20306 [2022-01-18 07:18:18,876 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 559 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 2770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 733 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 07:18:18,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 738 Invalid, 2770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1928 Invalid, 0 Unknown, 733 Unchecked, 1.7s Time] [2022-01-18 07:18:18,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2022-01-18 07:18:18,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 2588. [2022-01-18 07:18:18,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2588 states, 2587 states have (on average 3.5879396984924625) internal successors, (9282), 2587 states have internal predecessors, (9282), 0 states have call successors, (0), 0 states 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 07:18:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2588 states to 2588 states and 9282 transitions. [2022-01-18 07:18:18,930 INFO L78 Accepts]: Start accepts. Automaton has 2588 states and 9282 transitions. Word has length 26 [2022-01-18 07:18:18,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:18:18,930 INFO L470 AbstractCegarLoop]: Abstraction has 2588 states and 9282 transitions. [2022-01-18 07:18:18,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 07:18:18,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2588 states and 9282 transitions. [2022-01-18 07:18:18,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:18:18,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:18:18,934 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:18:18,949 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 07:18:19,142 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,SelfDestructingSolverStorable51 [2022-01-18 07:18:19,143 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:18:19,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:18:19,143 INFO L85 PathProgramCache]: Analyzing trace with hash -948313093, now seen corresponding path program 15 times [2022-01-18 07:18:19,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:18:19,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402232056] [2022-01-18 07:18:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:18:19,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:18:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:18:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:18:19,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:18:19,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402232056] [2022-01-18 07:18:19,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402232056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:18:19,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467338092] [2022-01-18 07:18:19,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:18:19,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:18:19,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:18:19,742 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 07:18:19,742 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 07:18:19,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:18:19,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:18:19,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 07:18:19,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:18:20,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:18:20,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:18:20,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 96 [2022-01-18 07:18:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:18:20,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:18:21,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:18:21,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:18:21,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 319 treesize of output 263 [2022-01-18 07:18:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:18:58,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467338092] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:18:58,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:18:58,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 07:18:58,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055666053] [2022-01-18 07:18:58,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:18:58,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 07:18:58,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:18:58,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 07:18:58,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-01-18 07:18:58,232 INFO L87 Difference]: Start difference. First operand 2588 states and 9282 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:19:14,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:19:14,048 INFO L93 Difference]: Finished difference Result 7226 states and 22911 transitions. [2022-01-18 07:19:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 07:19:14,048 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:19:14,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:19:14,061 INFO L225 Difference]: With dead ends: 7226 [2022-01-18 07:19:14,061 INFO L226 Difference]: Without dead ends: 7196 [2022-01-18 07:19:14,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 36 SyntacticMatches, 21 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4425 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=2101, Invalid=7999, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 07:19:14,062 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 770 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 07:19:14,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [770 Valid, 686 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2140 Invalid, 0 Unknown, 268 Unchecked, 1.9s Time] [2022-01-18 07:19:14,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7196 states. [2022-01-18 07:19:14,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7196 to 2668. [2022-01-18 07:19:14,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 2667 states have (on average 3.6141732283464565) internal successors, (9639), 2667 states have internal predecessors, (9639), 0 states have call successors, (0), 0 states 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 07:19:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 9639 transitions. [2022-01-18 07:19:14,152 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 9639 transitions. Word has length 26 [2022-01-18 07:19:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:19:14,153 INFO L470 AbstractCegarLoop]: Abstraction has 2668 states and 9639 transitions. [2022-01-18 07:19:14,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:19:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 9639 transitions. [2022-01-18 07:19:14,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:19:14,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:19:14,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:19:14,173 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 07:19:14,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:19:14,358 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:19:14,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:19:14,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1335219989, now seen corresponding path program 37 times [2022-01-18 07:19:14,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:19:14,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928843649] [2022-01-18 07:19:14,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:19:14,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:19:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:19:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:14,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:19:14,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928843649] [2022-01-18 07:19:14,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928843649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:19:14,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257311295] [2022-01-18 07:19:14,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:19:14,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:19:14,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:19:14,872 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 07:19:14,872 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 07:19:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:19:14,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 07:19:14,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:19:15,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:19:15,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:19:15,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:19:15,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:19:15,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 106 [2022-01-18 07:19:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:16,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:19:17,241 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 07:19:17,241 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 359 treesize of output 249 [2022-01-18 07:19:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:24,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257311295] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:19:24,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:19:24,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2022-01-18 07:19:24,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085156348] [2022-01-18 07:19:24,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:19:24,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:19:24,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:19:24,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:19:24,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:19:24,083 INFO L87 Difference]: Start difference. First operand 2668 states and 9639 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:19:42,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:19:42,870 INFO L93 Difference]: Finished difference Result 5826 states and 19475 transitions. [2022-01-18 07:19:42,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-18 07:19:42,870 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:19:42,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:19:42,880 INFO L225 Difference]: With dead ends: 5826 [2022-01-18 07:19:42,880 INFO L226 Difference]: Without dead ends: 5764 [2022-01-18 07:19:42,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5891 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=2294, Invalid=13456, Unknown=0, NotChecked=0, Total=15750 [2022-01-18 07:19:42,885 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 466 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 2537 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 2794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:19:42,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 607 Invalid, 2794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2537 Invalid, 0 Unknown, 145 Unchecked, 2.0s Time] [2022-01-18 07:19:42,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5764 states. [2022-01-18 07:19:42,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5764 to 2775. [2022-01-18 07:19:42,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 3.627974044700793) internal successors, (10064), 2774 states have internal predecessors, (10064), 0 states have call successors, (0), 0 states 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 07:19:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 10064 transitions. [2022-01-18 07:19:42,943 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 10064 transitions. Word has length 26 [2022-01-18 07:19:42,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:19:42,943 INFO L470 AbstractCegarLoop]: Abstraction has 2775 states and 10064 transitions. [2022-01-18 07:19:42,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:19:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 10064 transitions. [2022-01-18 07:19:42,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:19:42,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:19:42,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:19:42,965 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 07:19:43,155 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,SelfDestructingSolverStorable53 [2022-01-18 07:19:43,155 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:19:43,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:19:43,156 INFO L85 PathProgramCache]: Analyzing trace with hash -673180245, now seen corresponding path program 38 times [2022-01-18 07:19:43,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:19:43,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372461765] [2022-01-18 07:19:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:19:43,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:19:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:19:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:43,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:19:43,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372461765] [2022-01-18 07:19:43,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372461765] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:19:43,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873779693] [2022-01-18 07:19:43,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:19:43,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:19:43,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:19:43,673 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 07:19:43,674 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 07:19:43,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:19:43,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:19:43,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 07:19:43,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:19:44,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:19:44,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:19:44,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:19:44,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 118 [2022-01-18 07:19:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:44,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:19:45,897 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 07:19:45,897 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 359 treesize of output 249 [2022-01-18 07:19:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:49,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873779693] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:19:49,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:19:49,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 27 [2022-01-18 07:19:49,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106478674] [2022-01-18 07:19:49,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:19:49,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 07:19:49,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:19:49,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 07:19:49,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-01-18 07:19:49,927 INFO L87 Difference]: Start difference. First operand 2775 states and 10064 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:20:09,588 WARN L228 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 188 DAG size of output: 154 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:20:18,103 WARN L228 SmtUtils]: Spent 7.22s on a formula simplification. DAG size of input: 208 DAG size of output: 177 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:20:29,735 WARN L228 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 220 DAG size of output: 180 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:20:38,056 WARN L228 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 193 DAG size of output: 161 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:20:47,225 WARN L228 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 190 DAG size of output: 159 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:20:55,133 WARN L228 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 211 DAG size of output: 180 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:21:04,328 WARN L228 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 172 DAG size of output: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:21:11,044 WARN L228 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 191 DAG size of output: 156 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:21:20,040 WARN L228 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 170 DAG size of output: 140 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:21:31,489 WARN L228 SmtUtils]: Spent 9.74s on a formula simplification. DAG size of input: 205 DAG size of output: 175 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:21:38,162 WARN L228 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 153 DAG size of output: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:21:43,669 WARN L228 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 156 DAG size of output: 124 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:21:50,342 WARN L228 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 196 DAG size of output: 164 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:22:01,703 WARN L228 SmtUtils]: Spent 7.18s on a formula simplification. DAG size of input: 193 DAG size of output: 162 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:22:10,690 WARN L228 SmtUtils]: Spent 7.09s on a formula simplification. DAG size of input: 173 DAG size of output: 142 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:22:17,304 WARN L228 SmtUtils]: Spent 6.47s on a formula simplification. DAG size of input: 176 DAG size of output: 145 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:22:28,296 WARN L228 SmtUtils]: Spent 6.98s on a formula simplification. DAG size of input: 173 DAG size of output: 143 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:22:46,497 WARN L228 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 208 DAG size of output: 178 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:23:02,351 WARN L228 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 174 DAG size of output: 142 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 07:23:07,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:23:07,371 INFO L93 Difference]: Finished difference Result 8889 states and 28879 transitions. [2022-01-18 07:23:07,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-01-18 07:23:07,371 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:23:07,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:23:07,386 INFO L225 Difference]: With dead ends: 8889 [2022-01-18 07:23:07,387 INFO L226 Difference]: Without dead ends: 8816 [2022-01-18 07:23:07,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 46 SyntacticMatches, 10 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 35545 ImplicationChecksByTransitivity, 194.9s TimeCoverageRelationStatistics Valid=9291, Invalid=68829, Unknown=0, NotChecked=0, Total=78120 [2022-01-18 07:23:07,396 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 1115 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 3693 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 4394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 3693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 383 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:23:07,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 1059 Invalid, 4394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 3693 Invalid, 0 Unknown, 383 Unchecked, 3.2s Time] [2022-01-18 07:23:07,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8816 states. [2022-01-18 07:23:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8816 to 2819. [2022-01-18 07:23:07,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2818 states have (on average 3.640525195173882) internal successors, (10259), 2818 states have internal predecessors, (10259), 0 states have call successors, (0), 0 states 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 07:23:07,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 10259 transitions. [2022-01-18 07:23:07,492 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 10259 transitions. Word has length 26 [2022-01-18 07:23:07,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:23:07,492 INFO L470 AbstractCegarLoop]: Abstraction has 2819 states and 10259 transitions. [2022-01-18 07:23:07,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:23:07,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 10259 transitions. [2022-01-18 07:23:07,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:23:07,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:23:07,496 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:23:07,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 07:23:07,703 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,SelfDestructingSolverStorable54 [2022-01-18 07:23:07,703 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:23:07,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:23:07,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1182036829, now seen corresponding path program 16 times [2022-01-18 07:23:07,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:23:07,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137221515] [2022-01-18 07:23:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:23:07,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:23:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:23:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:23:08,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:23:08,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137221515] [2022-01-18 07:23:08,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137221515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:23:08,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028854498] [2022-01-18 07:23:08,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:23:08,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:23:08,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:23:08,556 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 07:23:08,557 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 07:23:08,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:23:08,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:23:08,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 07:23:08,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:23:09,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:23:09,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:23:09,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 84 [2022-01-18 07:23:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:23:09,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:23:10,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:23:10,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:23:10,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 295 treesize of output 245 Received shutdown request... [2022-01-18 07:23:12,536 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-18 07:23:12,538 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 07:23:12,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 07:23:12,562 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 07:23:12,562 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 07:23:12,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:23:12,747 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 2ms.. [2022-01-18 07:23:12,749 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 07:23:12,749 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 07:23:12,749 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 07:23:12,751 INFO L732 BasicCegarLoop]: Path program histogram: [38, 16, 1, 1] [2022-01-18 07:23:12,753 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 07:23:12,753 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 07:23:12,754 INFO L202 PluginConnector]: Adding new model mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 07:23:12 BasicIcfg [2022-01-18 07:23:12,754 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 07:23:12,754 INFO L158 Benchmark]: Toolchain (without parser) took 874098.25ms. Allocated memory was 360.7MB in the beginning and 903.9MB in the end (delta: 543.2MB). Free memory was 322.4MB in the beginning and 537.5MB in the end (delta: -215.1MB). Peak memory consumption was 568.7MB. Max. memory is 16.0GB. [2022-01-18 07:23:12,754 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 360.7MB. Free memory is still 323.6MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 07:23:12,754 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.43ms. Allocated memory is still 360.7MB. Free memory was 322.4MB in the beginning and 320.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 07:23:12,754 INFO L158 Benchmark]: Boogie Preprocessor took 14.66ms. Allocated memory is still 360.7MB. Free memory was 320.8MB in the beginning and 319.8MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 07:23:12,755 INFO L158 Benchmark]: RCFGBuilder took 183.05ms. Allocated memory is still 360.7MB. Free memory was 319.8MB in the beginning and 310.2MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 07:23:12,755 INFO L158 Benchmark]: TraceAbstraction took 873865.47ms. Allocated memory was 360.7MB in the beginning and 903.9MB in the end (delta: 543.2MB). Free memory was 309.8MB in the beginning and 537.5MB in the end (delta: -227.7MB). Peak memory consumption was 556.1MB. Max. memory is 16.0GB. [2022-01-18 07:23:12,755 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 0.10ms. Allocated memory is still 360.7MB. Free memory is still 323.6MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 27.43ms. Allocated memory is still 360.7MB. Free memory was 322.4MB in the beginning and 320.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 14.66ms. Allocated memory is still 360.7MB. Free memory was 320.8MB in the beginning and 319.8MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 183.05ms. Allocated memory is still 360.7MB. Free memory was 319.8MB in the beginning and 310.2MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 873865.47ms. Allocated memory was 360.7MB in the beginning and 903.9MB in the end (delta: 543.2MB). Free memory was 309.8MB in the beginning and 537.5MB in the end (delta: -227.7MB). Peak memory consumption was 556.1MB. 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: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 2ms.. - TimeoutResultAtElement [Line: 61]: 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 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 2ms.. - TimeoutResultAtElement [Line: 61]: 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 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 2ms.. - TimeoutResultAtElement [Line: 62]: 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 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 2ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 873.7s, OverallIterations: 56, TraceHistogramMax: 2, PathProgramHistogramMax: 38, EmptinessCheckTime: 0.1s, AutomataDifference: 410.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 18433 SdHoareTripleChecker+Valid, 33.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 18433 mSDsluCounter, 14782 SdHoareTripleChecker+Invalid, 28.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 5951 IncrementalHoareTripleChecker+Unchecked, 25944 mSDsCounter, 3659 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 48768 IncrementalHoareTripleChecker+Invalid, 58378 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3659 mSolverCounterUnsat, 1360 mSDtfsCounter, 48768 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5200 GetRequests, 1993 SyntacticMatches, 139 SemanticMatches, 3068 ConstructedPredicates, 0 IntricatePredicates, 11 DeprecatedPredicates, 102953 ImplicationChecksByTransitivity, 400.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2819occurred in iteration=55, InterpolantAutomatonStates: 2659, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.9s AutomataMinimizationTime, 55 MinimizatonAttempts, 98914 StatesRemovedByMinimization, 54 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 442.3s InterpolantComputationTime, 2618 NumberOfCodeBlocks, 2618 NumberOfCodeBlocksAsserted, 167 NumberOfCheckSat, 3747 ConstructedInterpolants, 67 QuantifiedInterpolants, 119189 SizeOfPredicates, 576 NumberOfNonLiveVariables, 3610 ConjunctsInSsa, 880 ConjunctsInUnsatCore, 161 InterpolantComputations, 2 PerfectInterpolantSequences, 173/787 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