/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/sum-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 07:26:41,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 07:26:41,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 07:26:41,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 07:26:41,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 07:26:41,912 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 07:26:41,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 07:26:41,914 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 07:26:41,948 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 07:26:41,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 07:26:41,948 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 07:26:41,948 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 07:26:41,949 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 07:26:41,949 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 07:26:41,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 07:26:41,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 07:26:41,950 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 07:26:41,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 07:26:41,951 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 07:26:41,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 07:26:41,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 07:26:41,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 07:26:41,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 07:26:41,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 07:26:41,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 07:26:41,952 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 07:26:41,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 07:26:41,952 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 07:26:41,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 07:26:41,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 07:26:41,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 07:26:41,952 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 07:26:41,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 07:26:41,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 07:26:41,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 07:26:41,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 07:26:41,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 07:26:41,954 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 07:26:41,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 07:26:41,954 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 07:26:41,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 07:26:41,955 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 07:26:42,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 07:26:42,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 07:26:42,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 07:26:42,189 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 07:26:42,191 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 07:26:42,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array.wvr.bpl [2022-01-18 07:26:42,193 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array.wvr.bpl' [2022-01-18 07:26:42,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 07:26:42,215 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 07:26:42,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 07:26:42,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 07:26:42,223 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 07:26:42,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:26:42" (1/1) ... [2022-01-18 07:26:42,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:26:42" (1/1) ... [2022-01-18 07:26:42,252 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 07:26:42,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 07:26:42,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 07:26:42,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 07:26:42,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 07:26:42,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:26:42" (1/1) ... [2022-01-18 07:26:42,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:26:42" (1/1) ... [2022-01-18 07:26:42,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:26:42" (1/1) ... [2022-01-18 07:26:42,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:26:42" (1/1) ... [2022-01-18 07:26:42,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:26:42" (1/1) ... [2022-01-18 07:26:42,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:26:42" (1/1) ... [2022-01-18 07:26:42,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:26:42" (1/1) ... [2022-01-18 07:26:42,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 07:26:42,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 07:26:42,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 07:26:42,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 07:26:42,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:26:42" (1/1) ... [2022-01-18 07:26:42,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 07:26:42,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:26:42,308 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 07:26:42,311 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 07:26:42,335 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 07:26:42,335 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 07:26:42,335 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 07:26:42,335 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 07:26:42,335 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 07:26:42,335 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 07:26:42,336 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 07:26:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 07:26:42,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 07:26:42,336 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 07:26:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 07:26:42,336 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 07:26:42,337 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 07:26:42,381 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 07:26:42,383 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 07:26:42,452 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 07:26:42,464 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 07:26:42,464 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 07:26:42,466 INFO L202 PluginConnector]: Adding new model sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 07:26:42 BoogieIcfgContainer [2022-01-18 07:26:42,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 07:26:42,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 07:26:42,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 07:26:42,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 07:26:42,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:26:42" (1/2) ... [2022-01-18 07:26:42,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a474fac and model type sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 07:26:42, skipping insertion in model container [2022-01-18 07:26:42,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 07:26:42" (2/2) ... [2022-01-18 07:26:42,472 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-array.wvr.bpl [2022-01-18 07:26:42,487 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 07:26:42,487 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 07:26:42,488 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 07:26:42,488 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 07:26:42,541 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 07:26:42,605 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 07:26:42,612 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 07:26:42,612 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 07:26:42,619 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-01-18 07:26:42,650 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 07:26:42,651 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 07:26:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 07:26:42,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:26:42,660 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 07:26:42,660 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:26:42,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:26:42,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1562983410, now seen corresponding path program 1 times [2022-01-18 07:26:42,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:26:42,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512641110] [2022-01-18 07:26:42,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:26:42,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:26:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:26:42,786 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 07:26:42,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:26:42,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512641110] [2022-01-18 07:26:42,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512641110] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 07:26:42,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 07:26:42,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 07:26:42,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296249493] [2022-01-18 07:26:42,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:26:42,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 07:26:42,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:26:42,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 07:26:42,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 07:26:42,822 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 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 07:26:42,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:26:42,865 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2022-01-18 07:26:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 07:26:42,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 07:26:42,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:26:42,876 INFO L225 Difference]: With dead ends: 217 [2022-01-18 07:26:42,877 INFO L226 Difference]: Without dead ends: 202 [2022-01-18 07:26:42,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 07:26:42,881 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:26:42,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 07:26:42,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-18 07:26:42,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2022-01-18 07:26:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:26:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2022-01-18 07:26:42,967 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2022-01-18 07:26:42,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:26:42,968 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2022-01-18 07:26:42,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 07:26:42,968 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2022-01-18 07:26:42,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 07:26:42,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:26:42,971 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 07:26:42,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 07:26:42,971 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:26:42,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:26:42,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1322843154, now seen corresponding path program 1 times [2022-01-18 07:26:42,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:26:42,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936277698] [2022-01-18 07:26:42,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:26:42,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:26:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:26:43,027 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 07:26:43,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:26:43,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936277698] [2022-01-18 07:26:43,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936277698] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 07:26:43,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 07:26:43,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 07:26:43,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851184324] [2022-01-18 07:26:43,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:26:43,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 07:26:43,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:26:43,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 07:26:43,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 07:26:43,031 INFO L87 Difference]: Start difference. First operand 149 states and 419 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 07:26:43,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:26:43,080 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2022-01-18 07:26:43,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 07:26:43,081 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 07:26:43,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:26:43,083 INFO L225 Difference]: With dead ends: 158 [2022-01-18 07:26:43,083 INFO L226 Difference]: Without dead ends: 158 [2022-01-18 07:26:43,083 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 07:26:43,085 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 07:26:43,085 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 07:26:43,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-18 07:26:43,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-01-18 07:26:43,100 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 07:26:43,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-01-18 07:26:43,102 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2022-01-18 07:26:43,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:26:43,102 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-01-18 07:26:43,102 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 07:26:43,102 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-01-18 07:26:43,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 07:26:43,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:26:43,104 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 07:26:43,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 07:26:43,104 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:26:43,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:26:43,105 INFO L85 PathProgramCache]: Analyzing trace with hash 286241452, now seen corresponding path program 1 times [2022-01-18 07:26:43,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:26:43,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473837673] [2022-01-18 07:26:43,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:26:43,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:26:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:26:43,157 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 07:26:43,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:26:43,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473837673] [2022-01-18 07:26:43,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473837673] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 07:26:43,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 07:26:43,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 07:26:43,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671461699] [2022-01-18 07:26:43,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:26:43,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 07:26:43,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:26:43,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 07:26:43,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 07:26:43,159 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) 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 07:26:43,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:26:43,230 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2022-01-18 07:26:43,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 07:26:43,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) 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 07:26:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:26:43,233 INFO L225 Difference]: With dead ends: 183 [2022-01-18 07:26:43,233 INFO L226 Difference]: Without dead ends: 183 [2022-01-18 07:26:43,233 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 07:26:43,234 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 76 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 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 07:26:43,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 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 07:26:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-18 07:26:43,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-01-18 07:26:43,246 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 07:26:43,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-01-18 07:26:43,248 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-01-18 07:26:43,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:26:43,248 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-01-18 07:26:43,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) 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 07:26:43,249 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-01-18 07:26:43,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 07:26:43,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:26:43,250 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 07:26:43,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 07:26:43,251 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:26:43,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:26:43,252 INFO L85 PathProgramCache]: Analyzing trace with hash -867206516, now seen corresponding path program 1 times [2022-01-18 07:26:43,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:26:43,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384837871] [2022-01-18 07:26:43,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:26:43,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:26:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:26:43,557 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 07:26:43,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:26:43,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384837871] [2022-01-18 07:26:43,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384837871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:26:43,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600164347] [2022-01-18 07:26:43,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:26:43,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:43,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:26:43,564 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 07:26:43,566 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 07:26:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:26:43,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 07:26:43,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:26:44,002 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 07:26:44,003 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 31 treesize of output 27 [2022-01-18 07:26:44,054 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 07:26:44,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:26:44,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:26:44,171 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 11 treesize of output 16 [2022-01-18 07:26:44,193 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 12 treesize of output 5 [2022-01-18 07:26:44,367 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 07:26:44,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600164347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:26:44,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:26:44,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 07:26:44,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631057841] [2022-01-18 07:26:44,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:26:44,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 07:26:44,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:26:44,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 07:26:44,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-18 07:26:44,374 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:26:44,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:26:44,749 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-01-18 07:26:44,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 07:26:44,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 07:26:44,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:26:44,753 INFO L225 Difference]: With dead ends: 366 [2022-01-18 07:26:44,753 INFO L226 Difference]: Without dead ends: 351 [2022-01-18 07:26:44,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:26:44,755 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 195 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:26:44,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 58 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:26:44,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-01-18 07:26:44,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-01-18 07:26:44,773 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 07:26:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-01-18 07:26:44,775 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-01-18 07:26:44,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:26:44,775 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-01-18 07:26:44,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:26:44,776 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-01-18 07:26:44,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 07:26:44,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:26:44,778 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 07:26:44,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 07:26:44,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:44,996 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:26:44,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:26:44,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1035015608, now seen corresponding path program 2 times [2022-01-18 07:26:44,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:26:44,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006954289] [2022-01-18 07:26:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:26:44,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:26:45,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:26:45,198 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 07:26:45,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:26:45,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006954289] [2022-01-18 07:26:45,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006954289] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:26:45,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447679732] [2022-01-18 07:26:45,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:26:45,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:45,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:26:45,200 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 07:26:45,228 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 07:26:45,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:26:45,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:26:45,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 07:26:45,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:26:45,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:26:45,492 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 11 treesize of output 15 [2022-01-18 07:26:45,566 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 07:26:45,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:26:45,678 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:26:45,679 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 11 treesize of output 16 [2022-01-18 07:26:45,694 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 12 treesize of output 5 [2022-01-18 07:26:45,810 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 07:26:45,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447679732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:26:45,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:26:45,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2022-01-18 07:26:45,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690936101] [2022-01-18 07:26:45,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:26:45,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 07:26:45,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:26:45,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 07:26:45,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-01-18 07:26:45,816 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:26:46,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:26:46,522 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-01-18 07:26:46,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 07:26:46,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 07:26:46,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:26:46,525 INFO L225 Difference]: With dead ends: 478 [2022-01-18 07:26:46,526 INFO L226 Difference]: Without dead ends: 463 [2022-01-18 07:26:46,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-01-18 07:26:46,527 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 277 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:26:46,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 109 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:26:46,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-18 07:26:46,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-01-18 07:26:46,538 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 07:26:46,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-01-18 07:26:46,539 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-01-18 07:26:46,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:26:46,540 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-01-18 07:26:46,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:26:46,540 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-01-18 07:26:46,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 07:26:46,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:26:46,542 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:26:46,570 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 07:26:46,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:46,755 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:26:46,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:26:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash -736242160, now seen corresponding path program 3 times [2022-01-18 07:26:46,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:26:46,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698705023] [2022-01-18 07:26:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:26:46,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:26:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:26:46,888 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 07:26:46,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:26:46,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698705023] [2022-01-18 07:26:46,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698705023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:26:46,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745616409] [2022-01-18 07:26:46,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:26:46,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:46,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:26:46,890 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 07:26:46,922 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 07:26:46,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 07:26:46,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:26:46,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 07:26:46,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:26:47,113 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 15 treesize of output 11 [2022-01-18 07:26:47,156 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 07:26:47,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:26:47,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:26:47,245 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 11 treesize of output 16 [2022-01-18 07:26:47,256 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 12 treesize of output 5 [2022-01-18 07:26:47,378 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 07:26:47,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745616409] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:26:47,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:26:47,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 07:26:47,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384022954] [2022-01-18 07:26:47,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:26:47,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 07:26:47,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:26:47,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 07:26:47,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-18 07:26:47,379 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:26:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:26:47,708 INFO L93 Difference]: Finished difference Result 418 states and 1203 transitions. [2022-01-18 07:26:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 07:26:47,709 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 07:26:47,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:26:47,711 INFO L225 Difference]: With dead ends: 418 [2022-01-18 07:26:47,711 INFO L226 Difference]: Without dead ends: 403 [2022-01-18 07:26:47,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-01-18 07:26:47,713 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 104 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:26:47,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 89 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:26:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-01-18 07:26:47,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 241. [2022-01-18 07:26:47,722 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 07:26:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-01-18 07:26:47,723 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-01-18 07:26:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:26:47,723 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-01-18 07:26:47,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:26:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-01-18 07:26:47,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 07:26:47,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:26:47,725 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 07:26:47,749 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 07:26:47,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:47,948 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:26:47,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:26:47,948 INFO L85 PathProgramCache]: Analyzing trace with hash 834583440, now seen corresponding path program 4 times [2022-01-18 07:26:47,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:26:47,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337997447] [2022-01-18 07:26:47,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:26:47,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:26:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:26:48,084 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 07:26:48,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:26:48,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337997447] [2022-01-18 07:26:48,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337997447] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:26:48,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849242474] [2022-01-18 07:26:48,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:26:48,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:48,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:26:48,086 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 07:26:48,088 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 07:26:48,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:26:48,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:26:48,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 07:26:48,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:26:48,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:26:48,279 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 33 treesize of output 34 [2022-01-18 07:26:48,406 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 07:26:48,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:26:48,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:26:48,508 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 11 treesize of output 16 [2022-01-18 07:26:48,524 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 12 treesize of output 5 [2022-01-18 07:26:48,680 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 07:26:48,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849242474] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:26:48,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:26:48,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 07:26:48,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906292581] [2022-01-18 07:26:48,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:26:48,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 07:26:48,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:26:48,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 07:26:48,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-18 07:26:48,686 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:26:48,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:26:48,919 INFO L93 Difference]: Finished difference Result 374 states and 1089 transitions. [2022-01-18 07:26:48,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 07:26:48,920 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 07:26:48,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:26:48,923 INFO L225 Difference]: With dead ends: 374 [2022-01-18 07:26:48,923 INFO L226 Difference]: Without dead ends: 359 [2022-01-18 07:26:48,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-01-18 07:26:48,924 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:26:48,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 113 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 195 Invalid, 0 Unknown, 118 Unchecked, 0.1s Time] [2022-01-18 07:26:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-18 07:26:48,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 245. [2022-01-18 07:26:48,931 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 07:26:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 714 transitions. [2022-01-18 07:26:48,932 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 714 transitions. Word has length 22 [2022-01-18 07:26:48,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:26:48,933 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 714 transitions. [2022-01-18 07:26:48,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:26:48,933 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 714 transitions. [2022-01-18 07:26:48,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 07:26:48,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:26:48,934 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 07:26:48,961 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 07:26:49,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:49,155 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:26:49,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:26:49,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1412835854, now seen corresponding path program 5 times [2022-01-18 07:26:49,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:26:49,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226958947] [2022-01-18 07:26:49,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:26:49,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:26:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:26:49,290 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 07:26:49,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:26:49,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226958947] [2022-01-18 07:26:49,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226958947] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:26:49,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753522403] [2022-01-18 07:26:49,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:26:49,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:49,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:26:49,300 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 07:26:49,301 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 07:26:49,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:26:49,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:26:49,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 07:26:49,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:26:49,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:26:49,527 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 19 treesize of output 23 [2022-01-18 07:26:49,658 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 07:26:49,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:26:49,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:26:49,791 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 11 treesize of output 16 [2022-01-18 07:26:49,810 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 12 treesize of output 5 [2022-01-18 07:26:49,968 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 07:26:49,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753522403] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:26:49,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:26:49,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-01-18 07:26:49,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513450915] [2022-01-18 07:26:49,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:26:49,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 07:26:49,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:26:49,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 07:26:49,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-18 07:26:49,970 INFO L87 Difference]: Start difference. First operand 245 states and 714 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:26:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:26:52,680 INFO L93 Difference]: Finished difference Result 992 states and 3011 transitions. [2022-01-18 07:26:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 07:26:52,681 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 07:26:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:26:52,686 INFO L225 Difference]: With dead ends: 992 [2022-01-18 07:26:52,686 INFO L226 Difference]: Without dead ends: 977 [2022-01-18 07:26:52,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=997, Invalid=3973, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 07:26:52,688 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 332 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:26:52,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 321 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 967 Invalid, 0 Unknown, 118 Unchecked, 0.6s Time] [2022-01-18 07:26:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-01-18 07:26:52,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 255. [2022-01-18 07:26:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.0) internal successors, (762), 254 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:26:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 762 transitions. [2022-01-18 07:26:52,701 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 762 transitions. Word has length 22 [2022-01-18 07:26:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:26:52,701 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 762 transitions. [2022-01-18 07:26:52,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:26:52,701 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 762 transitions. [2022-01-18 07:26:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 07:26:52,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:26:52,702 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 07:26:52,725 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 07:26:52,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:52,925 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:26:52,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:26:52,925 INFO L85 PathProgramCache]: Analyzing trace with hash 151290546, now seen corresponding path program 6 times [2022-01-18 07:26:52,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:26:52,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298292673] [2022-01-18 07:26:52,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:26:52,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:26:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:26:53,066 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 07:26:53,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:26:53,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298292673] [2022-01-18 07:26:53,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298292673] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:26:53,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435927273] [2022-01-18 07:26:53,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:26:53,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:53,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:26:53,067 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 07:26:53,068 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 07:26:53,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 07:26:53,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:26:53,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 07:26:53,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:26:53,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:26:53,242 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 11 treesize of output 15 [2022-01-18 07:26:53,326 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 07:26:53,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:26:53,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:26:53,439 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 11 treesize of output 16 [2022-01-18 07:26:53,451 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 12 treesize of output 5 [2022-01-18 07:26:53,554 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 07:26:53,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435927273] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:26:53,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:26:53,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-01-18 07:26:53,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621195149] [2022-01-18 07:26:53,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:26:53,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 07:26:53,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:26:53,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 07:26:53,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-18 07:26:53,555 INFO L87 Difference]: Start difference. First operand 255 states and 762 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 07:26:54,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:26:54,359 INFO L93 Difference]: Finished difference Result 597 states and 1769 transitions. [2022-01-18 07:26:54,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 07:26:54,359 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 22 [2022-01-18 07:26:54,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:26:54,363 INFO L225 Difference]: With dead ends: 597 [2022-01-18 07:26:54,363 INFO L226 Difference]: Without dead ends: 582 [2022-01-18 07:26:54,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=298, Invalid=824, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 07:26:54,364 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 186 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:26:54,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 128 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:26:54,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-01-18 07:26:54,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 258. [2022-01-18 07:26:54,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9961089494163424) internal successors, (770), 257 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:26:54,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 770 transitions. [2022-01-18 07:26:54,374 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 770 transitions. Word has length 22 [2022-01-18 07:26:54,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:26:54,374 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 770 transitions. [2022-01-18 07:26:54,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 07:26:54,375 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 770 transitions. [2022-01-18 07:26:54,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:26:54,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:26:54,376 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 07:26:54,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 07:26:54,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:54,601 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:26:54,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:26:54,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1176864790, now seen corresponding path program 7 times [2022-01-18 07:26:54,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:26:54,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709741857] [2022-01-18 07:26:54,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:26:54,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:26:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:26:54,667 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 07:26:54,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:26:54,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709741857] [2022-01-18 07:26:54,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709741857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:26:54,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758055531] [2022-01-18 07:26:54,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:26:54,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:54,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:26:54,669 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 07:26:54,671 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 07:26:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:26:54,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:26:54,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:26:54,791 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 07:26:54,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:26:54,891 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 07:26:54,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758055531] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:26:54,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:26:54,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 07:26:54,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280284507] [2022-01-18 07:26:54,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:26:54,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 07:26:54,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:26:54,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 07:26:54,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 07:26:54,895 INFO L87 Difference]: Start difference. First operand 258 states and 770 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 07:26:55,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:26:55,758 INFO L93 Difference]: Finished difference Result 1123 states and 3194 transitions. [2022-01-18 07:26:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 07:26:55,759 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 07:26:55,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:26:55,764 INFO L225 Difference]: With dead ends: 1123 [2022-01-18 07:26:55,764 INFO L226 Difference]: Without dead ends: 1123 [2022-01-18 07:26:55,765 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 07:26:55,766 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 270 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 07:26:55,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 214 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 07:26:55,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-01-18 07:26:55,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 322. [2022-01-18 07:26:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.196261682242991) internal successors, (1026), 321 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:26:55,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1026 transitions. [2022-01-18 07:26:55,781 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1026 transitions. Word has length 24 [2022-01-18 07:26:55,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:26:55,781 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1026 transitions. [2022-01-18 07:26:55,781 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 07:26:55,782 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1026 transitions. [2022-01-18 07:26:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:26:55,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:26:55,783 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 07:26:55,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-18 07:26:56,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:56,005 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:26:56,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:26:56,006 INFO L85 PathProgramCache]: Analyzing trace with hash 2141783662, now seen corresponding path program 8 times [2022-01-18 07:26:56,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:26:56,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078719251] [2022-01-18 07:26:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:26:56,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:26:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:26:56,052 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 07:26:56,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:26:56,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078719251] [2022-01-18 07:26:56,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078719251] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:26:56,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97548557] [2022-01-18 07:26:56,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:26:56,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:56,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:26:56,054 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 07:26:56,080 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 07:26:56,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:26:56,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:26:56,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:26:56,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:26:56,189 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 07:26:56,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:26:56,311 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 07:26:56,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97548557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:26:56,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:26:56,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 07:26:56,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761844132] [2022-01-18 07:26:56,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:26:56,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 07:26:56,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:26:56,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 07:26:56,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 07:26:56,313 INFO L87 Difference]: Start difference. First operand 322 states and 1026 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 07:26:58,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:26:58,218 INFO L93 Difference]: Finished difference Result 1814 states and 5087 transitions. [2022-01-18 07:26:58,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 07:26:58,218 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 07:26:58,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:26:58,242 INFO L225 Difference]: With dead ends: 1814 [2022-01-18 07:26:58,242 INFO L226 Difference]: Without dead ends: 1814 [2022-01-18 07:26:58,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 07:26:58,245 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 475 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:26:58,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 315 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 07:26:58,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2022-01-18 07:26:58,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 315. [2022-01-18 07:26:58,263 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 07:26:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-01-18 07:26:58,265 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-01-18 07:26:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:26:58,265 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-01-18 07:26:58,265 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 07:26:58,265 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-01-18 07:26:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:26:58,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:26:58,267 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 07:26:58,289 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 07:26:58,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-18 07:26:58,480 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:26:58,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:26:58,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1586231554, now seen corresponding path program 9 times [2022-01-18 07:26:58,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:26:58,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465216642] [2022-01-18 07:26:58,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:26:58,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:26:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:26:58,533 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 07:26:58,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:26:58,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465216642] [2022-01-18 07:26:58,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465216642] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:26:58,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737274389] [2022-01-18 07:26:58,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:26:58,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:58,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:26:58,535 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 07:26:58,536 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 07:26:58,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:26:58,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:26:58,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:26:58,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:26:58,663 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 07:26:58,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:26:58,783 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 07:26:58,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737274389] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:26:58,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:26:58,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 07:26:58,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298405902] [2022-01-18 07:26:58,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:26:58,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 07:26:58,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:26:58,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 07:26:58,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-18 07:26:58,785 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 07:26:59,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:26:59,675 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-01-18 07:26:59,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 07:26:59,676 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 07:26:59,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:26:59,682 INFO L225 Difference]: With dead ends: 1470 [2022-01-18 07:26:59,683 INFO L226 Difference]: Without dead ends: 1470 [2022-01-18 07:26:59,684 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 07:26:59,684 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 429 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 07:26:59,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 212 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 07:26:59,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-01-18 07:26:59,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-01-18 07:26:59,699 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 07:26:59,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-01-18 07:26:59,700 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-01-18 07:26:59,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:26:59,700 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-01-18 07:26:59,700 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 07:26:59,700 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-01-18 07:26:59,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:26:59,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:26:59,701 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 07:26:59,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 07:26:59,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:59,915 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:26:59,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:26:59,916 INFO L85 PathProgramCache]: Analyzing trace with hash -650092882, now seen corresponding path program 1 times [2022-01-18 07:26:59,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:26:59,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930324489] [2022-01-18 07:26:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:26:59,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:26:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:26:59,949 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 07:26:59,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:26:59,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930324489] [2022-01-18 07:26:59,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930324489] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:26:59,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761758835] [2022-01-18 07:26:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:26:59,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:59,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:26:59,951 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 07:26:59,953 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 07:26:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:26:59,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 07:26:59,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:00,043 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 07:27:00,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:00,109 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 07:27:00,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761758835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:00,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:00,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 07:27:00,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539578435] [2022-01-18 07:27:00,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:00,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 07:27:00,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:00,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 07:27:00,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-18 07:27:00,110 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 07:27:00,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:00,263 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-01-18 07:27:00,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 07:27:00,263 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 07:27:00,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:00,267 INFO L225 Difference]: With dead ends: 685 [2022-01-18 07:27:00,267 INFO L226 Difference]: Without dead ends: 679 [2022-01-18 07:27:00,267 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 07:27:00,267 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 167 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:00,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 44 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:27:00,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-18 07:27:00,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-01-18 07:27:00,279 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 07:27:00,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-01-18 07:27:00,280 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-01-18 07:27:00,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:00,280 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-01-18 07:27:00,281 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 07:27:00,281 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-01-18 07:27:00,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:00,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:00,282 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 07:27:00,306 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 07:27:00,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 07:27:00,495 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:00,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:00,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1087061590, now seen corresponding path program 10 times [2022-01-18 07:27:00,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:00,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942053186] [2022-01-18 07:27:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:00,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:00,550 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 07:27:00,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:00,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942053186] [2022-01-18 07:27:00,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942053186] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:00,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785789345] [2022-01-18 07:27:00,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:27:00,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:00,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:00,552 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 07:27:00,553 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 07:27:00,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:27:00,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:00,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:00,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:00,688 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 07:27:00,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:00,740 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 07:27:00,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785789345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:00,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:00,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 07:27:00,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016248076] [2022-01-18 07:27:00,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:00,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 07:27:00,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 07:27:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-18 07:27:00,741 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 07:27:01,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:01,032 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-01-18 07:27:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 07:27:01,032 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 07:27:01,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:01,038 INFO L225 Difference]: With dead ends: 1159 [2022-01-18 07:27:01,038 INFO L226 Difference]: Without dead ends: 1111 [2022-01-18 07:27:01,040 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 07:27:01,041 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 296 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:01,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 110 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:27:01,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-01-18 07:27:01,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-01-18 07:27:01,058 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 07:27:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-01-18 07:27:01,060 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-01-18 07:27:01,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:01,060 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-01-18 07:27:01,060 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 07:27:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-01-18 07:27:01,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:01,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:01,062 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 07:27:01,087 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 07:27:01,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 07:27:01,279 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:01,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:01,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1793018922, now seen corresponding path program 2 times [2022-01-18 07:27:01,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:01,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807168916] [2022-01-18 07:27:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:01,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:01,315 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 07:27:01,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:01,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807168916] [2022-01-18 07:27:01,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807168916] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:01,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100531769] [2022-01-18 07:27:01,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:27:01,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:01,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:01,316 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 07:27:01,318 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 07:27:01,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:27:01,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:01,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 07:27:01,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:01,433 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 07:27:01,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:01,510 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 07:27:01,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100531769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:01,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:01,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 07:27:01,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090763644] [2022-01-18 07:27:01,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:01,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 07:27:01,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:01,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 07:27:01,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 07:27:01,512 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 07:27:01,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:01,722 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-01-18 07:27:01,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 07:27:01,723 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 07:27:01,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:01,730 INFO L225 Difference]: With dead ends: 1267 [2022-01-18 07:27:01,730 INFO L226 Difference]: Without dead ends: 1267 [2022-01-18 07:27:01,730 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 07:27:01,731 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 202 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:01,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 64 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:27:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-01-18 07:27:01,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-01-18 07:27:01,762 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 07:27:01,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-01-18 07:27:01,764 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-01-18 07:27:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:01,765 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-01-18 07:27:01,765 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 07:27:01,765 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-01-18 07:27:01,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:01,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:01,767 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 07:27:01,793 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 07:27:01,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 07:27:01,980 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:01,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1155266808, now seen corresponding path program 11 times [2022-01-18 07:27:01,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:01,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334330816] [2022-01-18 07:27:01,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:01,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:02,025 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 07:27:02,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:02,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334330816] [2022-01-18 07:27:02,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334330816] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:02,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092631623] [2022-01-18 07:27:02,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:27:02,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:02,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:02,027 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 07:27:02,053 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 07:27:02,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:27:02,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:02,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:02,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:02,143 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 07:27:02,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:02,215 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 07:27:02,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092631623] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:02,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:02,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 07:27:02,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545769412] [2022-01-18 07:27:02,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:02,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 07:27:02,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:02,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 07:27:02,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-18 07:27:02,216 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 07:27:02,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:02,784 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-01-18 07:27:02,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 07:27:02,785 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 07:27:02,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:02,793 INFO L225 Difference]: With dead ends: 2268 [2022-01-18 07:27:02,793 INFO L226 Difference]: Without dead ends: 2268 [2022-01-18 07:27:02,794 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 07:27:02,795 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 199 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:02,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 212 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:27:02,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-01-18 07:27:02,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-01-18 07:27:02,821 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 07:27:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-01-18 07:27:02,823 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-01-18 07:27:02,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:02,823 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-01-18 07:27:02,824 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 07:27:02,824 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-01-18 07:27:02,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:02,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:02,825 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 07:27:02,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 07:27:03,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 07:27:03,051 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:03,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:03,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1940180902, now seen corresponding path program 12 times [2022-01-18 07:27:03,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:03,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830078237] [2022-01-18 07:27:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:03,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:03,093 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 07:27:03,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:03,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830078237] [2022-01-18 07:27:03,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830078237] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:03,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668847931] [2022-01-18 07:27:03,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:27:03,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:03,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:03,095 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 07:27:03,125 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 07:27:03,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 07:27:03,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:03,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:03,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:03,202 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 07:27:03,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:03,270 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 07:27:03,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668847931] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:03,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:03,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 07:27:03,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522780618] [2022-01-18 07:27:03,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:03,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 07:27:03,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:03,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 07:27:03,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 07:27:03,271 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 07:27:03,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:03,905 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-01-18 07:27:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 07:27:03,907 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 07:27:03,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:03,917 INFO L225 Difference]: With dead ends: 2256 [2022-01-18 07:27:03,917 INFO L226 Difference]: Without dead ends: 2256 [2022-01-18 07:27:03,918 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 07:27:03,919 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 262 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:03,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 162 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:27:03,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-01-18 07:27:03,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-01-18 07:27:03,946 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 07:27:03,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-01-18 07:27:03,948 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-01-18 07:27:03,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:03,948 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-01-18 07:27:03,948 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 07:27:03,948 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-01-18 07:27:03,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:03,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:03,950 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 07:27:03,980 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 07:27:04,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:04,163 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:04,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:04,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1966730932, now seen corresponding path program 13 times [2022-01-18 07:27:04,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:04,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487674800] [2022-01-18 07:27:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:04,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:04,209 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 07:27:04,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:04,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487674800] [2022-01-18 07:27:04,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487674800] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:04,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374087735] [2022-01-18 07:27:04,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:27:04,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:04,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:04,211 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 07:27:04,212 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 07:27:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:04,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:04,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:04,326 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 07:27:04,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:04,369 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 07:27:04,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374087735] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:04,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:04,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-01-18 07:27:04,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188239873] [2022-01-18 07:27:04,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:04,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 07:27:04,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:04,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 07:27:04,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-18 07:27:04,370 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 07:27:04,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:04,634 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-01-18 07:27:04,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 07:27:04,634 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 07:27:04,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:04,639 INFO L225 Difference]: With dead ends: 1611 [2022-01-18 07:27:04,639 INFO L226 Difference]: Without dead ends: 1611 [2022-01-18 07:27:04,639 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 07:27:04,640 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 237 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:04,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 114 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:27:04,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-01-18 07:27:04,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-01-18 07:27:04,661 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 07:27:04,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-01-18 07:27:04,663 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-01-18 07:27:04,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:04,663 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-01-18 07:27:04,664 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 07:27:04,664 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-01-18 07:27:04,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:04,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:04,666 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 07:27:04,691 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 07:27:04,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 07:27:04,879 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:04,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:04,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1895359760, now seen corresponding path program 14 times [2022-01-18 07:27:04,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:04,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741773096] [2022-01-18 07:27:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:04,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:04,923 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 07:27:04,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:04,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741773096] [2022-01-18 07:27:04,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741773096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:04,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392207218] [2022-01-18 07:27:04,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:27:04,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:04,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:04,925 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 07:27:04,937 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 07:27:04,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:27:04,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:04,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:04,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:05,023 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 07:27:05,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:05,089 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 07:27:05,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392207218] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:05,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:05,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 07:27:05,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028075384] [2022-01-18 07:27:05,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:05,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 07:27:05,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:05,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 07:27:05,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 07:27:05,091 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 07:27:05,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:05,574 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-01-18 07:27:05,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 07:27:05,574 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 07:27:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:05,579 INFO L225 Difference]: With dead ends: 2408 [2022-01-18 07:27:05,579 INFO L226 Difference]: Without dead ends: 2404 [2022-01-18 07:27:05,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 07:27:05,583 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 351 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:05,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 134 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:27:05,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-01-18 07:27:05,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-01-18 07:27:05,611 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 07:27:05,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-01-18 07:27:05,614 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-01-18 07:27:05,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:05,614 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-01-18 07:27:05,614 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 07:27:05,614 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-01-18 07:27:05,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:05,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:05,616 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 07:27:05,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-18 07:27:05,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:05,831 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:05,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:05,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2029990096, now seen corresponding path program 15 times [2022-01-18 07:27:05,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:05,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349208031] [2022-01-18 07:27:05,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:05,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:05,870 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 07:27:05,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:05,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349208031] [2022-01-18 07:27:05,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349208031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:05,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043482301] [2022-01-18 07:27:05,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:27:05,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:05,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:05,872 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 07:27:05,882 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 07:27:05,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 07:27:05,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:05,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:05,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:05,994 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 07:27:05,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:06,086 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 07:27:06,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043482301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:06,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:06,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 07:27:06,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947247557] [2022-01-18 07:27:06,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:06,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 07:27:06,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:06,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 07:27:06,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:27:06,089 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 07:27:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:06,941 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-01-18 07:27:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 07:27:06,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 07:27:06,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:06,951 INFO L225 Difference]: With dead ends: 3509 [2022-01-18 07:27:06,951 INFO L226 Difference]: Without dead ends: 3509 [2022-01-18 07:27:06,952 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 07:27:06,953 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 553 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:06,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 223 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 07:27:06,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-01-18 07:27:06,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-01-18 07:27:06,998 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 07:27:07,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-01-18 07:27:07,001 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-01-18 07:27:07,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:07,001 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-01-18 07:27:07,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 07:27:07,002 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-01-18 07:27:07,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:07,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:07,004 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 07:27:07,029 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 07:27:07,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:07,212 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:07,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:07,212 INFO L85 PathProgramCache]: Analyzing trace with hash -621938046, now seen corresponding path program 16 times [2022-01-18 07:27:07,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:07,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209634735] [2022-01-18 07:27:07,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:07,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:07,257 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 07:27:07,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:07,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209634735] [2022-01-18 07:27:07,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209634735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:07,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796785640] [2022-01-18 07:27:07,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:27:07,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:07,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:07,258 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 07:27:07,259 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 07:27:07,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:27:07,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:07,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:07,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:07,359 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 07:27:07,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:07,445 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 07:27:07,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796785640] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:07,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:07,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 07:27:07,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73272129] [2022-01-18 07:27:07,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:07,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 07:27:07,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:07,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 07:27:07,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:27:07,446 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 07:27:08,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:08,629 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-01-18 07:27:08,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 07:27:08,629 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 07:27:08,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:08,638 INFO L225 Difference]: With dead ends: 3211 [2022-01-18 07:27:08,638 INFO L226 Difference]: Without dead ends: 3207 [2022-01-18 07:27:08,640 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 07:27:08,640 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 421 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:08,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 273 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 07:27:08,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-01-18 07:27:08,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-01-18 07:27:08,677 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 07:27:08,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-01-18 07:27:08,680 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-01-18 07:27:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:08,680 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-01-18 07:27:08,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 07:27:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-01-18 07:27:08,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:08,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:08,682 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 07:27:08,704 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 07:27:08,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:08,903 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:08,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:08,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1534223598, now seen corresponding path program 3 times [2022-01-18 07:27:08,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:08,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302694914] [2022-01-18 07:27:08,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:08,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:08,939 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 07:27:08,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:08,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302694914] [2022-01-18 07:27:08,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302694914] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:08,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459306167] [2022-01-18 07:27:08,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:27:08,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:08,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:08,941 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 07:27:08,941 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 07:27:08,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 07:27:08,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:08,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 07:27:08,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:09,024 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 07:27:09,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:09,086 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 07:27:09,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459306167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:09,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:09,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-01-18 07:27:09,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610585242] [2022-01-18 07:27:09,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:09,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 07:27:09,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 07:27:09,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-18 07:27:09,087 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 07:27:09,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:09,210 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-01-18 07:27:09,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 07:27:09,210 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 07:27:09,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:09,217 INFO L225 Difference]: With dead ends: 1333 [2022-01-18 07:27:09,218 INFO L226 Difference]: Without dead ends: 1333 [2022-01-18 07:27:09,218 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 07:27:09,219 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:09,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 60 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:27:09,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-01-18 07:27:09,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-01-18 07:27:09,236 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 07:27:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-01-18 07:27:09,239 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-01-18 07:27:09,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:09,239 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-01-18 07:27:09,239 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 07:27:09,240 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-01-18 07:27:09,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:09,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:09,241 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 07:27:09,266 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 07:27:09,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:09,459 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:09,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:09,460 INFO L85 PathProgramCache]: Analyzing trace with hash -604023854, now seen corresponding path program 17 times [2022-01-18 07:27:09,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:09,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509541995] [2022-01-18 07:27:09,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:09,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:09,503 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 07:27:09,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:09,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509541995] [2022-01-18 07:27:09,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509541995] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:09,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503374069] [2022-01-18 07:27:09,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:27:09,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:09,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:09,504 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 07:27:09,532 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 07:27:09,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:27:09,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:09,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:09,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:09,593 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 07:27:09,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:09,648 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 07:27:09,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503374069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:09,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:09,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 07:27:09,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621594642] [2022-01-18 07:27:09,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:09,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 07:27:09,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:09,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 07:27:09,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-18 07:27:09,649 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 07:27:09,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:09,991 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-01-18 07:27:09,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 07:27:09,991 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 07:27:09,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:09,995 INFO L225 Difference]: With dead ends: 2129 [2022-01-18 07:27:09,995 INFO L226 Difference]: Without dead ends: 2129 [2022-01-18 07:27:09,996 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 07:27:09,996 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 179 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:09,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 132 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:27:09,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-01-18 07:27:10,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-01-18 07:27:10,024 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 07:27:10,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-01-18 07:27:10,026 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-01-18 07:27:10,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:10,027 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-01-18 07:27:10,027 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 07:27:10,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-01-18 07:27:10,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:10,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:10,035 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 07:27:10,083 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 07:27:10,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 07:27:10,259 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:10,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:10,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1298655598, now seen corresponding path program 18 times [2022-01-18 07:27:10,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:10,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963371136] [2022-01-18 07:27:10,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:10,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:10,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:10,298 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 07:27:10,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:10,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963371136] [2022-01-18 07:27:10,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963371136] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:10,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918940189] [2022-01-18 07:27:10,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:27:10,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:10,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:10,300 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 07:27:10,312 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 07:27:10,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:27:10,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:10,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:10,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:10,381 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 07:27:10,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:10,437 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 07:27:10,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918940189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:10,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:10,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 07:27:10,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496023233] [2022-01-18 07:27:10,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:10,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 07:27:10,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:10,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 07:27:10,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 07:27:10,438 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 07:27:10,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:10,772 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-01-18 07:27:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 07:27:10,772 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 07:27:10,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:10,778 INFO L225 Difference]: With dead ends: 2262 [2022-01-18 07:27:10,778 INFO L226 Difference]: Without dead ends: 2262 [2022-01-18 07:27:10,778 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 07:27:10,780 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 159 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:10,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 123 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:27:10,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-01-18 07:27:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-01-18 07:27:10,834 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 07:27:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-01-18 07:27:10,837 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-01-18 07:27:10,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:10,838 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-01-18 07:27:10,838 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 07:27:10,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-01-18 07:27:10,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:10,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:10,840 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 07:27:10,863 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 07:27:11,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-18 07:27:11,051 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:11,052 INFO L85 PathProgramCache]: Analyzing trace with hash 215632942, now seen corresponding path program 19 times [2022-01-18 07:27:11,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:11,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014690388] [2022-01-18 07:27:11,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:11,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:11,093 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 07:27:11,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:11,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014690388] [2022-01-18 07:27:11,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014690388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:11,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257381703] [2022-01-18 07:27:11,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:27:11,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:11,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:11,094 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 07:27:11,126 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 07:27:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:11,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:11,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:11,224 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 07:27:11,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:11,273 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 07:27:11,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257381703] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:11,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:11,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-01-18 07:27:11,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105906170] [2022-01-18 07:27:11,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:11,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 07:27:11,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:11,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 07:27:11,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-18 07:27:11,274 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 07:27:11,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:11,513 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-01-18 07:27:11,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 07:27:11,514 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 07:27:11,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:11,516 INFO L225 Difference]: With dead ends: 1474 [2022-01-18 07:27:11,517 INFO L226 Difference]: Without dead ends: 1464 [2022-01-18 07:27:11,517 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 07:27:11,517 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 160 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:11,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 117 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:27:11,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-01-18 07:27:11,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-01-18 07:27:11,535 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 07:27:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-01-18 07:27:11,538 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-01-18 07:27:11,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:11,538 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-01-18 07:27:11,538 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 07:27:11,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-01-18 07:27:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:11,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:11,541 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:27:11,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-18 07:27:11,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:11,754 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:11,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:11,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1253834456, now seen corresponding path program 20 times [2022-01-18 07:27:11,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:11,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636577256] [2022-01-18 07:27:11,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:11,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:11,795 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 07:27:11,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:11,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636577256] [2022-01-18 07:27:11,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636577256] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:11,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598427406] [2022-01-18 07:27:11,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:27:11,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:11,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:11,797 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 07:27:11,799 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 07:27:11,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:27:11,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:11,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:11,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:11,870 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 07:27:11,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:11,929 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 07:27:11,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598427406] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:11,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:11,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 07:27:11,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165569324] [2022-01-18 07:27:11,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:11,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 07:27:11,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:11,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 07:27:11,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 07:27:11,930 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 07:27:12,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:12,205 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-01-18 07:27:12,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 07:27:12,205 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 07:27:12,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:12,209 INFO L225 Difference]: With dead ends: 2318 [2022-01-18 07:27:12,209 INFO L226 Difference]: Without dead ends: 2314 [2022-01-18 07:27:12,209 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 07:27:12,209 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 185 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:12,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 118 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:27:12,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-01-18 07:27:12,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-01-18 07:27:12,229 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 07:27:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-01-18 07:27:12,232 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-01-18 07:27:12,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:12,232 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-01-18 07:27:12,232 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 07:27:12,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-01-18 07:27:12,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:12,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:12,234 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 07:27:12,252 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 07:27:12,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:12,443 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:12,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:12,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1851171114, now seen corresponding path program 21 times [2022-01-18 07:27:12,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:12,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141553555] [2022-01-18 07:27:12,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:12,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:12,486 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 07:27:12,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:12,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141553555] [2022-01-18 07:27:12,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141553555] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:12,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337975536] [2022-01-18 07:27:12,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:27:12,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:12,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:12,488 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 07:27:12,488 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 07:27:12,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:27:12,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:12,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:12,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:12,565 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 07:27:12,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:12,623 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 07:27:12,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337975536] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:12,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:12,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 07:27:12,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470556586] [2022-01-18 07:27:12,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:12,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 07:27:12,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:12,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 07:27:12,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 07:27:12,625 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 07:27:12,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:12,940 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-01-18 07:27:12,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 07:27:12,940 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 07:27:12,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:12,945 INFO L225 Difference]: With dead ends: 2302 [2022-01-18 07:27:12,945 INFO L226 Difference]: Without dead ends: 2290 [2022-01-18 07:27:12,946 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 07:27:12,946 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 224 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:12,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 129 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:27:12,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-01-18 07:27:12,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-01-18 07:27:12,972 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 07:27:12,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-01-18 07:27:12,975 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-01-18 07:27:12,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:12,975 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-01-18 07:27:12,975 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 07:27:12,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-01-18 07:27:12,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:12,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:12,978 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 07:27:12,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-18 07:27:13,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 07:27:13,183 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:13,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:13,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1324750830, now seen corresponding path program 22 times [2022-01-18 07:27:13,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:13,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958248269] [2022-01-18 07:27:13,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:13,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:13,226 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 07:27:13,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:13,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958248269] [2022-01-18 07:27:13,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958248269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:13,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710061048] [2022-01-18 07:27:13,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:27:13,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:13,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:13,228 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 07:27:13,229 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 07:27:13,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:27:13,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:13,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:13,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:13,349 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 07:27:13,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:13,433 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 07:27:13,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710061048] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:13,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:13,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 07:27:13,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026727416] [2022-01-18 07:27:13,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:13,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 07:27:13,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:13,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 07:27:13,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:27:13,436 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 07:27:14,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:14,283 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-01-18 07:27:14,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 07:27:14,283 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 07:27:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:14,290 INFO L225 Difference]: With dead ends: 4760 [2022-01-18 07:27:14,290 INFO L226 Difference]: Without dead ends: 4760 [2022-01-18 07:27:14,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 07:27:14,292 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 502 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:14,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 203 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:27:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-01-18 07:27:14,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-01-18 07:27:14,327 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 07:27:14,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-01-18 07:27:14,331 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-01-18 07:27:14,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:14,331 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-01-18 07:27:14,331 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 07:27:14,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-01-18 07:27:14,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:14,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:14,334 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 07:27:14,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-18 07:27:14,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 07:27:14,534 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:14,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:14,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1891702910, now seen corresponding path program 23 times [2022-01-18 07:27:14,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:14,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859698780] [2022-01-18 07:27:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:14,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:14,575 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 07:27:14,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:14,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859698780] [2022-01-18 07:27:14,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859698780] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:14,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137069262] [2022-01-18 07:27:14,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:27:14,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:14,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:14,576 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 07:27:14,577 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 07:27:14,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:27:14,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:14,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:14,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:14,687 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 07:27:14,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:14,770 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 07:27:14,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137069262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:14,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:14,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 07:27:14,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401343802] [2022-01-18 07:27:14,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:14,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 07:27:14,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:14,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 07:27:14,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:27:14,771 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 07:27:15,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:15,469 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-01-18 07:27:15,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 07:27:15,469 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 07:27:15,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:15,476 INFO L225 Difference]: With dead ends: 4260 [2022-01-18 07:27:15,476 INFO L226 Difference]: Without dead ends: 4260 [2022-01-18 07:27:15,477 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 07:27:15,478 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 405 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:15,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 186 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:27:15,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-01-18 07:27:15,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-01-18 07:27:15,519 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 07:27:15,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-01-18 07:27:15,523 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-01-18 07:27:15,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:15,523 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-01-18 07:27:15,523 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 07:27:15,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-01-18 07:27:15,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:15,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:15,526 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 07:27:15,547 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 07:27:15,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 07:27:15,747 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:15,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:15,747 INFO L85 PathProgramCache]: Analyzing trace with hash 719357052, now seen corresponding path program 24 times [2022-01-18 07:27:15,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:15,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368672855] [2022-01-18 07:27:15,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:15,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:15,788 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 07:27:15,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:15,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368672855] [2022-01-18 07:27:15,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368672855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:15,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454589305] [2022-01-18 07:27:15,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:27:15,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:15,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:15,790 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 07:27:15,794 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 07:27:15,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:27:15,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:15,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:15,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:15,906 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 07:27:15,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:15,976 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 07:27:15,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454589305] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:15,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:15,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 07:27:15,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471056685] [2022-01-18 07:27:15,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:15,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 07:27:15,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:15,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 07:27:15,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 07:27:15,977 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 07:27:16,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:16,640 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-01-18 07:27:16,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 07:27:16,640 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 07:27:16,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:16,647 INFO L225 Difference]: With dead ends: 4602 [2022-01-18 07:27:16,647 INFO L226 Difference]: Without dead ends: 4602 [2022-01-18 07:27:16,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 07:27:16,648 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 287 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:16,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 204 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:27:16,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-01-18 07:27:16,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-01-18 07:27:16,691 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 07:27:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-01-18 07:27:16,694 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-01-18 07:27:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:16,695 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-01-18 07:27:16,695 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 07:27:16,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-01-18 07:27:16,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:16,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:16,698 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 07:27:16,722 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 07:27:16,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:16,920 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:16,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:16,920 INFO L85 PathProgramCache]: Analyzing trace with hash 800733140, now seen corresponding path program 25 times [2022-01-18 07:27:16,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:16,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473640465] [2022-01-18 07:27:16,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:16,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:16,957 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 07:27:16,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:16,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473640465] [2022-01-18 07:27:16,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473640465] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:16,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709435036] [2022-01-18 07:27:16,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:27:16,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:16,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:16,959 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 07:27:16,959 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 07:27:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:16,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:16,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:17,053 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 07:27:17,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:17,122 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 07:27:17,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709435036] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:17,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:17,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 07:27:17,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000045198] [2022-01-18 07:27:17,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:17,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 07:27:17,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:17,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 07:27:17,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 07:27:17,123 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 07:27:17,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:17,660 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-01-18 07:27:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 07:27:17,660 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 07:27:17,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:17,667 INFO L225 Difference]: With dead ends: 4348 [2022-01-18 07:27:17,667 INFO L226 Difference]: Without dead ends: 4344 [2022-01-18 07:27:17,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 07:27:17,668 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 374 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:17,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 174 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:27:17,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-01-18 07:27:17,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-01-18 07:27:17,704 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 07:27:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-18 07:27:17,706 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-18 07:27:17,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:17,707 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-18 07:27:17,707 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 07:27:17,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-18 07:27:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:17,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:17,709 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 07:27:17,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-18 07:27:17,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:17,910 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:17,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:17,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1731390356, now seen corresponding path program 26 times [2022-01-18 07:27:17,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:17,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962946959] [2022-01-18 07:27:17,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:17,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:17,950 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 07:27:17,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:17,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962946959] [2022-01-18 07:27:17,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962946959] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:17,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295717375] [2022-01-18 07:27:17,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:27:17,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:17,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:17,951 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 07:27:17,954 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 07:27:17,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:27:17,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:17,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:17,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:18,056 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 07:27:18,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:18,132 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 07:27:18,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295717375] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:18,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:18,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 07:27:18,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566957793] [2022-01-18 07:27:18,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:18,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 07:27:18,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:18,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 07:27:18,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:27:18,133 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 07:27:18,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:18,734 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-01-18 07:27:18,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 07:27:18,734 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 07:27:18,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:18,740 INFO L225 Difference]: With dead ends: 4035 [2022-01-18 07:27:18,740 INFO L226 Difference]: Without dead ends: 4035 [2022-01-18 07:27:18,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 07:27:18,741 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 443 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:18,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 229 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:27:18,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-01-18 07:27:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-01-18 07:27:18,773 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 07:27:18,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-01-18 07:27:18,776 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-01-18 07:27:18,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:18,776 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-01-18 07:27:18,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 07:27:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-01-18 07:27:18,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:18,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:18,778 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 07:27:18,793 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 07:27:18,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:18,979 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:18,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:18,979 INFO L85 PathProgramCache]: Analyzing trace with hash -920537786, now seen corresponding path program 27 times [2022-01-18 07:27:18,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:18,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541645062] [2022-01-18 07:27:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:18,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:19,024 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 07:27:19,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:19,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541645062] [2022-01-18 07:27:19,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541645062] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:19,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170484404] [2022-01-18 07:27:19,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:27:19,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:19,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:19,026 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 07:27:19,027 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 07:27:19,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:27:19,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:19,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:19,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:19,128 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 07:27:19,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:19,201 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 07:27:19,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170484404] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:19,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:19,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 07:27:19,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944775476] [2022-01-18 07:27:19,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:19,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 07:27:19,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:19,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 07:27:19,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:27:19,202 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 07:27:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:19,937 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-01-18 07:27:19,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 07:27:19,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 07:27:19,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:19,943 INFO L225 Difference]: With dead ends: 3794 [2022-01-18 07:27:19,943 INFO L226 Difference]: Without dead ends: 3790 [2022-01-18 07:27:19,943 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 07:27:19,944 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 403 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:19,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 178 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:27:19,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-01-18 07:27:19,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-01-18 07:27:19,972 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 07:27:19,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-18 07:27:19,975 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-18 07:27:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:19,975 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-18 07:27:19,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 07:27:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-18 07:27:19,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:19,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:19,977 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 07:27:19,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 07:27:20,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-18 07:27:20,178 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:20,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:20,178 INFO L85 PathProgramCache]: Analyzing trace with hash 82890198, now seen corresponding path program 28 times [2022-01-18 07:27:20,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:20,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394712382] [2022-01-18 07:27:20,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:20,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:20,224 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 07:27:20,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:20,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394712382] [2022-01-18 07:27:20,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394712382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:20,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456992946] [2022-01-18 07:27:20,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:27:20,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:20,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:20,226 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 07:27:20,233 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 07:27:20,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:27:20,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:20,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:20,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:20,317 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 07:27:20,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:20,380 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 07:27:20,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456992946] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:20,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:20,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 07:27:20,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141877557] [2022-01-18 07:27:20,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:20,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 07:27:20,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:20,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 07:27:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 07:27:20,381 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 07:27:21,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:21,022 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-01-18 07:27:21,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 07:27:21,022 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 07:27:21,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:21,030 INFO L225 Difference]: With dead ends: 3978 [2022-01-18 07:27:21,030 INFO L226 Difference]: Without dead ends: 3978 [2022-01-18 07:27:21,030 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 07:27:21,031 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 277 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:21,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 178 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:27:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-01-18 07:27:21,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-01-18 07:27:21,064 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 07:27:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-01-18 07:27:21,069 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-01-18 07:27:21,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:21,069 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-01-18 07:27:21,069 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 07:27:21,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-01-18 07:27:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:21,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:21,073 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 07:27:21,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 07:27:21,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:21,294 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:21,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:21,294 INFO L85 PathProgramCache]: Analyzing trace with hash 164266286, now seen corresponding path program 29 times [2022-01-18 07:27:21,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:21,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923559625] [2022-01-18 07:27:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:21,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:21,334 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 07:27:21,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:21,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923559625] [2022-01-18 07:27:21,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923559625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:21,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503725149] [2022-01-18 07:27:21,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:27:21,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:21,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:21,335 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 07:27:21,336 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 07:27:21,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:27:21,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:21,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:21,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:21,417 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 07:27:21,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:21,483 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 07:27:21,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503725149] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:21,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:21,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 07:27:21,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98286449] [2022-01-18 07:27:21,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:21,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 07:27:21,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:21,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 07:27:21,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 07:27:21,485 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 07:27:21,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:21,975 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-01-18 07:27:21,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 07:27:21,975 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 07:27:21,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:21,981 INFO L225 Difference]: With dead ends: 3706 [2022-01-18 07:27:21,981 INFO L226 Difference]: Without dead ends: 3702 [2022-01-18 07:27:21,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 07:27:21,982 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 284 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:21,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 124 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:27:21,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-01-18 07:27:22,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-01-18 07:27:22,014 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 07:27:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-01-18 07:27:22,018 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-01-18 07:27:22,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:22,019 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-01-18 07:27:22,019 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 07:27:22,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-01-18 07:27:22,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:22,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:22,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:27:22,049 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 07:27:22,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:22,235 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:22,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:22,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1350825686, now seen corresponding path program 30 times [2022-01-18 07:27:22,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:22,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651353452] [2022-01-18 07:27:22,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:22,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:22,288 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 07:27:22,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:22,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651353452] [2022-01-18 07:27:22,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651353452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:22,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547574883] [2022-01-18 07:27:22,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:27:22,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:22,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:22,289 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 07:27:22,309 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 07:27:22,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:27:22,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:22,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:22,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:22,391 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 07:27:22,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:22,469 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 07:27:22,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547574883] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:22,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:22,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 07:27:22,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624025065] [2022-01-18 07:27:22,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:22,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 07:27:22,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:22,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 07:27:22,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-18 07:27:22,470 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 07:27:23,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:23,021 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-01-18 07:27:23,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 07:27:23,021 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 07:27:23,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:23,027 INFO L225 Difference]: With dead ends: 4114 [2022-01-18 07:27:23,027 INFO L226 Difference]: Without dead ends: 4102 [2022-01-18 07:27:23,028 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 07:27:23,028 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 274 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:23,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 193 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:27:23,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-01-18 07:27:23,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-01-18 07:27:23,081 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 07:27:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-01-18 07:27:23,084 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-01-18 07:27:23,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:23,084 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-01-18 07:27:23,084 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 07:27:23,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-01-18 07:27:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:23,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:23,087 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 07:27:23,103 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 07:27:23,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 07:27:23,288 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:23,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:23,288 INFO L85 PathProgramCache]: Analyzing trace with hash 246301030, now seen corresponding path program 31 times [2022-01-18 07:27:23,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:23,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425545952] [2022-01-18 07:27:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:23,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:23,332 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 07:27:23,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:23,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425545952] [2022-01-18 07:27:23,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425545952] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:23,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322912646] [2022-01-18 07:27:23,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:27:23,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:23,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:23,334 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 07:27:23,334 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 07:27:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:23,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:23,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:23,439 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 07:27:23,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:23,526 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 07:27:23,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322912646] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:23,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:23,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 07:27:23,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886912483] [2022-01-18 07:27:23,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:23,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 07:27:23,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:23,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 07:27:23,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-01-18 07:27:23,528 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 07:27:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:24,170 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-01-18 07:27:24,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 07:27:24,170 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 07:27:24,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:24,176 INFO L225 Difference]: With dead ends: 3694 [2022-01-18 07:27:24,176 INFO L226 Difference]: Without dead ends: 3694 [2022-01-18 07:27:24,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 07:27:24,177 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 361 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:24,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 292 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:27:24,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-01-18 07:27:24,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-01-18 07:27:24,208 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 07:27:24,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-01-18 07:27:24,213 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-01-18 07:27:24,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:24,213 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-01-18 07:27:24,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 07:27:24,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-01-18 07:27:24,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:24,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:24,217 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 07:27:24,241 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 07:27:24,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 07:27:24,431 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:24,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:24,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1889340184, now seen corresponding path program 32 times [2022-01-18 07:27:24,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:24,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338461833] [2022-01-18 07:27:24,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:24,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:24,474 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 07:27:24,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:24,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338461833] [2022-01-18 07:27:24,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338461833] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:24,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047517939] [2022-01-18 07:27:24,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:27:24,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:24,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:24,475 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 07:27:24,476 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 07:27:24,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:27:24,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:24,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:24,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:24,579 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 07:27:24,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:24,660 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 07:27:24,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047517939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:24,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:24,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 07:27:24,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022762069] [2022-01-18 07:27:24,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:24,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 07:27:24,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:24,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 07:27:24,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-01-18 07:27:24,661 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 07:27:25,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:25,477 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-01-18 07:27:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 07:27:25,478 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 07:27:25,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:25,483 INFO L225 Difference]: With dead ends: 3420 [2022-01-18 07:27:25,483 INFO L226 Difference]: Without dead ends: 3416 [2022-01-18 07:27:25,484 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 07:27:25,484 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 284 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:25,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 234 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:27:25,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-01-18 07:27:25,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-01-18 07:27:25,532 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 07:27:25,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-01-18 07:27:25,535 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-01-18 07:27:25,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:25,535 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-01-18 07:27:25,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 07:27:25,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-01-18 07:27:25,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 07:27:25,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:25,538 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 07:27:25,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 07:27:25,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 07:27:25,739 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:25,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:25,739 INFO L85 PathProgramCache]: Analyzing trace with hash 621883006, now seen corresponding path program 33 times [2022-01-18 07:27:25,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:25,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116592434] [2022-01-18 07:27:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:25,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:25,789 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 07:27:25,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:25,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116592434] [2022-01-18 07:27:25,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116592434] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:25,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243019417] [2022-01-18 07:27:25,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:27:25,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:25,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:25,791 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 07:27:25,811 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 07:27:25,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:27:25,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:25,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:27:25,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:25,899 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 07:27:25,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:25,984 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 07:27:25,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243019417] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:25,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:25,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 07:27:25,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677472703] [2022-01-18 07:27:25,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:25,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 07:27:25,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:25,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 07:27:25,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-18 07:27:25,985 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 07:27:26,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:26,589 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-01-18 07:27:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 07:27:26,589 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 07:27:26,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:26,594 INFO L225 Difference]: With dead ends: 3256 [2022-01-18 07:27:26,595 INFO L226 Difference]: Without dead ends: 3244 [2022-01-18 07:27:26,595 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 07:27:26,595 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 249 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:26,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 188 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:27:26,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-01-18 07:27:26,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-01-18 07:27:26,624 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 07:27:26,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-01-18 07:27:26,627 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-01-18 07:27:26,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:26,627 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-01-18 07:27:26,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 07:27:26,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-01-18 07:27:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:27:26,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:26,630 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 07:27:26,645 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 07:27:26,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 07:27:26,831 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:26,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:26,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1878950772, now seen corresponding path program 4 times [2022-01-18 07:27:26,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:26,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983692431] [2022-01-18 07:27:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:26,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:27,033 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 07:27:27,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:27,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983692431] [2022-01-18 07:27:27,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983692431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:27,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215454494] [2022-01-18 07:27:27,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:27:27,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:27,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:27,035 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 07:27:27,035 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 07:27:27,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:27:27,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:27,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 07:27:27,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:27,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:27:27,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:27,384 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 26 treesize of output 18 [2022-01-18 07:27:27,409 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 07:27:27,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:27,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:27,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:27:27,615 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 19 treesize of output 54 [2022-01-18 07:27:27,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:27,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:27,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:27:27,788 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 19 treesize of output 46 [2022-01-18 07:27:28,042 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 07:27:28,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215454494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:28,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:28,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 07:27:28,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431847036] [2022-01-18 07:27:28,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:28,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:27:28,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:28,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:27:28,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:27:28,043 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 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 07:27:30,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:30,146 INFO L93 Difference]: Finished difference Result 3835 states and 12416 transitions. [2022-01-18 07:27:30,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 07:27:30,146 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 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 26 [2022-01-18 07:27:30,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:30,152 INFO L225 Difference]: With dead ends: 3835 [2022-01-18 07:27:30,152 INFO L226 Difference]: Without dead ends: 3805 [2022-01-18 07:27:30,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 07:27:30,153 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 501 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:30,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 238 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 07:27:30,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2022-01-18 07:27:30,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 1792. [2022-01-18 07:27:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 3.5907314349525405) internal successors, (6431), 1791 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:27:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 6431 transitions. [2022-01-18 07:27:30,195 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 6431 transitions. Word has length 26 [2022-01-18 07:27:30,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:30,195 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 6431 transitions. [2022-01-18 07:27:30,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 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 07:27:30,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 6431 transitions. [2022-01-18 07:27:30,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:27:30,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:30,198 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 07:27:30,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-18 07:27:30,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 07:27:30,399 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:30,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:30,399 INFO L85 PathProgramCache]: Analyzing trace with hash 387618508, now seen corresponding path program 5 times [2022-01-18 07:27:30,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:30,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673213695] [2022-01-18 07:27:30,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:30,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:30,623 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 07:27:30,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:30,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673213695] [2022-01-18 07:27:30,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673213695] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:30,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099330879] [2022-01-18 07:27:30,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:27:30,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:30,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:30,625 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 07:27:30,626 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 07:27:30,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:27:30,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:30,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 07:27:30,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:30,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:30,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:27:30,982 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 21 treesize of output 13 [2022-01-18 07:27:31,020 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 07:27:31,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:31,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:27:31,254 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 36 treesize of output 69 [2022-01-18 07:27:31,844 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 07:27:31,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099330879] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:31,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:31,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 07:27:31,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67040974] [2022-01-18 07:27:31,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:31,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 07:27:31,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:31,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 07:27:31,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-01-18 07:27:31,845 INFO L87 Difference]: Start difference. First operand 1792 states and 6431 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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 07:27:34,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:34,487 INFO L93 Difference]: Finished difference Result 4707 states and 15469 transitions. [2022-01-18 07:27:34,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 07:27:34,487 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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 26 [2022-01-18 07:27:34,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:34,495 INFO L225 Difference]: With dead ends: 4707 [2022-01-18 07:27:34,495 INFO L226 Difference]: Without dead ends: 4690 [2022-01-18 07:27:34,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=969, Invalid=5837, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 07:27:34,496 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 416 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 578 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:34,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 434 Invalid, 1672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 999 Invalid, 0 Unknown, 578 Unchecked, 0.5s Time] [2022-01-18 07:27:34,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4690 states. [2022-01-18 07:27:34,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4690 to 1853. [2022-01-18 07:27:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 3.603131749460043) internal successors, (6673), 1852 states have internal predecessors, (6673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:27:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 6673 transitions. [2022-01-18 07:27:34,538 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 6673 transitions. Word has length 26 [2022-01-18 07:27:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:34,539 INFO L470 AbstractCegarLoop]: Abstraction has 1853 states and 6673 transitions. [2022-01-18 07:27:34,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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 07:27:34,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 6673 transitions. [2022-01-18 07:27:34,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:27:34,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:34,542 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 07:27:34,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 07:27:34,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-01-18 07:27:34,742 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:34,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:34,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1979047816, now seen corresponding path program 34 times [2022-01-18 07:27:34,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:34,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785056316] [2022-01-18 07:27:34,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:34,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:35,004 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 07:27:35,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:35,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785056316] [2022-01-18 07:27:35,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785056316] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:35,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389010965] [2022-01-18 07:27:35,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:27:35,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:35,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:35,005 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 07:27:35,006 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 07:27:35,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:27:35,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:35,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:27:35,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:35,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:27:35,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:35,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:35,311 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 21 treesize of output 11 [2022-01-18 07:27:35,334 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 07:27:35,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:35,518 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 07:27:35,518 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 21 treesize of output 46 [2022-01-18 07:27:35,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:35,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:35,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:27:35,599 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 22 treesize of output 5 [2022-01-18 07:27:35,688 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 07:27:35,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389010965] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:35,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:35,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 07:27:35,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487093077] [2022-01-18 07:27:35,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:35,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:27:35,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:35,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:27:35,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:27:35,689 INFO L87 Difference]: Start difference. First operand 1853 states and 6673 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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 07:27:38,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:38,560 INFO L93 Difference]: Finished difference Result 3583 states and 12115 transitions. [2022-01-18 07:27:38,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 07:27:38,560 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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 07:27:38,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:38,566 INFO L225 Difference]: With dead ends: 3583 [2022-01-18 07:27:38,566 INFO L226 Difference]: Without dead ends: 3568 [2022-01-18 07:27:38,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=894, Invalid=4656, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 07:27:38,567 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 325 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1875 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:38,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 345 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1875 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 07:27:38,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2022-01-18 07:27:38,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 1900. [2022-01-18 07:27:38,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 3.592943654555029) internal successors, (6823), 1899 states have internal predecessors, (6823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:27:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 6823 transitions. [2022-01-18 07:27:38,625 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 6823 transitions. Word has length 26 [2022-01-18 07:27:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:38,625 INFO L470 AbstractCegarLoop]: Abstraction has 1900 states and 6823 transitions. [2022-01-18 07:27:38,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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 07:27:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 6823 transitions. [2022-01-18 07:27:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:27:38,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:38,629 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 07:27:38,653 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 07:27:38,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 07:27:38,848 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:38,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:38,849 INFO L85 PathProgramCache]: Analyzing trace with hash -498179772, now seen corresponding path program 6 times [2022-01-18 07:27:38,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:38,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194132306] [2022-01-18 07:27:38,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:38,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:39,062 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 07:27:39,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:39,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194132306] [2022-01-18 07:27:39,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194132306] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:39,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656900689] [2022-01-18 07:27:39,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:27:39,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:39,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:39,068 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 07:27:39,069 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 07:27:39,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:27:39,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:39,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 07:27:39,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:39,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:27:39,389 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 19 treesize of output 27 [2022-01-18 07:27:39,664 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 07:27:39,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:39,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:39,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:39,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:27:39,976 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 19 treesize of output 46 [2022-01-18 07:27:40,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:40,019 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 20 treesize of output 5 [2022-01-18 07:27:40,169 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 07:27:40,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656900689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:40,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:40,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 07:27:40,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794440622] [2022-01-18 07:27:40,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:40,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 07:27:40,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:40,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 07:27:40,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-01-18 07:27:40,171 INFO L87 Difference]: Start difference. First operand 1900 states and 6823 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 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 07:27:46,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:46,788 INFO L93 Difference]: Finished difference Result 4754 states and 15532 transitions. [2022-01-18 07:27:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 07:27:46,788 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 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 07:27:46,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:46,796 INFO L225 Difference]: With dead ends: 4754 [2022-01-18 07:27:46,796 INFO L226 Difference]: Without dead ends: 4709 [2022-01-18 07:27:46,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3963 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2010, Invalid=9120, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 07:27:46,798 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 675 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 2255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 506 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:46,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 606 Invalid, 2255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1659 Invalid, 0 Unknown, 506 Unchecked, 1.0s Time] [2022-01-18 07:27:46,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4709 states. [2022-01-18 07:27:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4709 to 1959. [2022-01-18 07:27:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1958 states have (on average 3.594994892747702) internal successors, (7039), 1958 states have internal predecessors, (7039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:27:46,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 7039 transitions. [2022-01-18 07:27:46,844 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 7039 transitions. Word has length 26 [2022-01-18 07:27:46,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:46,844 INFO L470 AbstractCegarLoop]: Abstraction has 1959 states and 7039 transitions. [2022-01-18 07:27:46,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 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 07:27:46,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 7039 transitions. [2022-01-18 07:27:46,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:27:46,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:46,847 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, 1, 1] [2022-01-18 07:27:46,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-18 07:27:47,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-01-18 07:27:47,048 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:47,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:47,048 INFO L85 PathProgramCache]: Analyzing trace with hash -943920224, now seen corresponding path program 7 times [2022-01-18 07:27:47,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:47,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725810887] [2022-01-18 07:27:47,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:47,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:47,267 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 07:27:47,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:47,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725810887] [2022-01-18 07:27:47,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725810887] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:47,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592949838] [2022-01-18 07:27:47,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:27:47,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:47,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:47,268 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 07:27:47,269 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 07:27:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:47,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 07:27:47,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:47,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:27:47,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:47,553 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 23 treesize of output 15 [2022-01-18 07:27:47,584 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 07:27:47,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:47,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:47,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:27:47,762 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 19 treesize of output 54 [2022-01-18 07:27:47,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:47,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:47,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:27:47,915 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 20 treesize of output 47 [2022-01-18 07:27:48,189 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 07:27:48,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592949838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:48,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:48,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 07:27:48,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405271066] [2022-01-18 07:27:48,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:48,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 07:27:48,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:48,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 07:27:48,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-01-18 07:27:48,190 INFO L87 Difference]: Start difference. First operand 1959 states and 7039 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 07:27:50,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:50,727 INFO L93 Difference]: Finished difference Result 4690 states and 14796 transitions. [2022-01-18 07:27:50,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 07:27:50,728 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 07:27:50,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:50,735 INFO L225 Difference]: With dead ends: 4690 [2022-01-18 07:27:50,735 INFO L226 Difference]: Without dead ends: 4675 [2022-01-18 07:27:50,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 07:27:50,736 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 728 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:50,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 383 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1361 Invalid, 0 Unknown, 67 Unchecked, 0.8s Time] [2022-01-18 07:27:50,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2022-01-18 07:27:50,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 2024. [2022-01-18 07:27:50,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 3.583786455758774) internal successors, (7250), 2023 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:27:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 7250 transitions. [2022-01-18 07:27:50,796 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 7250 transitions. Word has length 26 [2022-01-18 07:27:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:50,796 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 7250 transitions. [2022-01-18 07:27:50,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 07:27:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 7250 transitions. [2022-01-18 07:27:50,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:27:50,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:50,800 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 07:27:50,827 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 07:27:51,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:51,015 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:51,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:51,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1290187270, now seen corresponding path program 8 times [2022-01-18 07:27:51,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:51,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073685925] [2022-01-18 07:27:51,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:51,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:51,224 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 07:27:51,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:51,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073685925] [2022-01-18 07:27:51,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073685925] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:51,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377162615] [2022-01-18 07:27:51,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:27:51,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:51,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:51,225 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 07:27:51,226 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 07:27:51,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:27:51,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:51,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 07:27:51,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:51,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:27:51,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:51,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:27:51,454 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2022-01-18 07:27:51,503 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 07:27:51,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:51,743 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 07:27:51,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-01-18 07:27:51,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:51,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:51,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:27:51,866 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 20 treesize of output 47 [2022-01-18 07:27:52,083 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 07:27:52,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377162615] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:52,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:52,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 07:27:52,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970374352] [2022-01-18 07:27:52,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:52,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 07:27:52,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:52,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 07:27:52,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-18 07:27:52,085 INFO L87 Difference]: Start difference. First operand 2024 states and 7250 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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 07:27:56,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:27:56,194 INFO L93 Difference]: Finished difference Result 4691 states and 15051 transitions. [2022-01-18 07:27:56,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 07:27:56,194 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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 07:27:56,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:27:56,202 INFO L225 Difference]: With dead ends: 4691 [2022-01-18 07:27:56,202 INFO L226 Difference]: Without dead ends: 4661 [2022-01-18 07:27:56,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2621 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1102, Invalid=6908, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 07:27:56,202 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 462 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 2568 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:27:56,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 613 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2568 Invalid, 0 Unknown, 358 Unchecked, 1.2s Time] [2022-01-18 07:27:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2022-01-18 07:27:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 2033. [2022-01-18 07:27:56,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.5866141732283463) internal successors, (7288), 2032 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:27:56,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7288 transitions. [2022-01-18 07:27:56,244 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7288 transitions. Word has length 26 [2022-01-18 07:27:56,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:27:56,244 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 7288 transitions. [2022-01-18 07:27:56,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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 07:27:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7288 transitions. [2022-01-18 07:27:56,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:27:56,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:27:56,247 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 07:27:56,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 07:27:56,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:56,448 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:27:56,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:27:56,448 INFO L85 PathProgramCache]: Analyzing trace with hash 39509260, now seen corresponding path program 35 times [2022-01-18 07:27:56,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:27:56,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075736767] [2022-01-18 07:27:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:27:56,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:27:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:27:56,706 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 07:27:56,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:27:56,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075736767] [2022-01-18 07:27:56,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075736767] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:27:56,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065429328] [2022-01-18 07:27:56,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:27:56,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:27:56,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:27:56,707 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 07:27:56,708 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 07:27:56,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:27:56,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:27:56,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 07:27:56,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:27:56,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:27:56,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:27:56,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:56,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:56,980 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 26 treesize of output 16 [2022-01-18 07:27:57,000 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 07:27:57,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:27:57,166 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 07:27:57,166 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 21 treesize of output 46 [2022-01-18 07:27:57,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:57,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:27:57,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:27:57,234 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 22 treesize of output 5 [2022-01-18 07:27:57,312 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 07:27:57,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065429328] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:27:57,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:27:57,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-01-18 07:27:57,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719083529] [2022-01-18 07:27:57,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:27:57,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 07:27:57,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:27:57,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 07:27:57,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 07:27:57,313 INFO L87 Difference]: Start difference. First operand 2033 states and 7288 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:00,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:28:00,964 INFO L93 Difference]: Finished difference Result 4642 states and 15313 transitions. [2022-01-18 07:28:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 07:28:00,964 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 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 07:28:00,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:28:00,971 INFO L225 Difference]: With dead ends: 4642 [2022-01-18 07:28:00,971 INFO L226 Difference]: Without dead ends: 4595 [2022-01-18 07:28:00,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3113 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1504, Invalid=7052, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 07:28:00,972 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 463 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 1857 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 07:28:00,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 427 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1857 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 07:28:00,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4595 states. [2022-01-18 07:28:01,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4595 to 2070. [2022-01-18 07:28:01,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 3.583856935717738) internal successors, (7415), 2069 states have internal predecessors, (7415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 7415 transitions. [2022-01-18 07:28:01,012 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 7415 transitions. Word has length 26 [2022-01-18 07:28:01,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:28:01,013 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 7415 transitions. [2022-01-18 07:28:01,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:01,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 7415 transitions. [2022-01-18 07:28:01,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:28:01,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:28:01,016 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 07:28:01,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-18 07:28:01,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 07:28:01,216 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:28:01,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:28:01,217 INFO L85 PathProgramCache]: Analyzing trace with hash -936809584, now seen corresponding path program 36 times [2022-01-18 07:28:01,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:28:01,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757394749] [2022-01-18 07:28:01,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:28:01,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:28:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:28:01,452 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 07:28:01,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:28:01,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757394749] [2022-01-18 07:28:01,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757394749] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:28:01,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460984907] [2022-01-18 07:28:01,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:28:01,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:28:01,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:28:01,456 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 07:28:01,473 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 07:28:01,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:28:01,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:28:01,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:28:01,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:28:01,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:28:01,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:28:01,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:01,730 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 21 treesize of output 37 [2022-01-18 07:28:01,793 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 07:28:01,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:28:01,968 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 07:28:01,968 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 21 treesize of output 46 [2022-01-18 07:28:02,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:02,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:02,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:28:02,023 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 22 treesize of output 5 [2022-01-18 07:28:02,102 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 07:28:02,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460984907] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:28:02,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:28:02,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24 [2022-01-18 07:28:02,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699564259] [2022-01-18 07:28:02,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:28:02,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 07:28:02,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:28:02,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 07:28:02,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 07:28:02,103 INFO L87 Difference]: Start difference. First operand 2070 states and 7415 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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 07:28:13,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:28:13,853 INFO L93 Difference]: Finished difference Result 5943 states and 19306 transitions. [2022-01-18 07:28:13,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-01-18 07:28:13,854 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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 07:28:13,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:28:13,863 INFO L225 Difference]: With dead ends: 5943 [2022-01-18 07:28:13,864 INFO L226 Difference]: Without dead ends: 5895 [2022-01-18 07:28:13,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19066 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=4752, Invalid=40830, Unknown=0, NotChecked=0, Total=45582 [2022-01-18 07:28:13,866 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 570 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 4808 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 4911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 4808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:28:13,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 1012 Invalid, 4911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 4808 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 07:28:13,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5895 states. [2022-01-18 07:28:13,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5895 to 2086. [2022-01-18 07:28:13,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 3.5851318944844124) internal successors, (7475), 2085 states have internal predecessors, (7475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:13,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 7475 transitions. [2022-01-18 07:28:13,915 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 7475 transitions. Word has length 26 [2022-01-18 07:28:13,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:28:13,915 INFO L470 AbstractCegarLoop]: Abstraction has 2086 states and 7475 transitions. [2022-01-18 07:28:13,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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 07:28:13,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 7475 transitions. [2022-01-18 07:28:13,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:28:13,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:28:13,918 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 07:28:13,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 07:28:14,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 07:28:14,119 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:28:14,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:28:14,119 INFO L85 PathProgramCache]: Analyzing trace with hash 296771640, now seen corresponding path program 9 times [2022-01-18 07:28:14,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:28:14,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884501404] [2022-01-18 07:28:14,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:28:14,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:28:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:28:14,306 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 07:28:14,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:28:14,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884501404] [2022-01-18 07:28:14,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884501404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:28:14,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18572583] [2022-01-18 07:28:14,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:28:14,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:28:14,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:28:14,308 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 07:28:14,310 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 07:28:14,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:28:14,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:28:14,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 07:28:14,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:28:14,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:28:14,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:14,583 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 19 treesize of output 11 [2022-01-18 07:28:14,612 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 07:28:14,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:28:14,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:14,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:14,772 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 19 treesize of output 54 [2022-01-18 07:28:14,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:14,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:14,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:14,924 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 19 treesize of output 46 [2022-01-18 07:28:15,150 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 07:28:15,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18572583] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:28:15,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:28:15,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 07:28:15,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259176166] [2022-01-18 07:28:15,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:28:15,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:28:15,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:28:15,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:28:15,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:28:15,151 INFO L87 Difference]: Start difference. First operand 2086 states and 7475 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:16,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:28:16,985 INFO L93 Difference]: Finished difference Result 4142 states and 13554 transitions. [2022-01-18 07:28:16,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 07:28:16,986 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:28:16,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:28:16,992 INFO L225 Difference]: With dead ends: 4142 [2022-01-18 07:28:16,992 INFO L226 Difference]: Without dead ends: 4112 [2022-01-18 07:28:16,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=664, Invalid=2642, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 07:28:16,993 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 432 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:28:16,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 303 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 07:28:16,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4112 states. [2022-01-18 07:28:17,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4112 to 2109. [2022-01-18 07:28:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2109 states, 2108 states have (on average 3.584440227703985) internal successors, (7556), 2108 states have internal predecessors, (7556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:17,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 7556 transitions. [2022-01-18 07:28:17,031 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 7556 transitions. Word has length 26 [2022-01-18 07:28:17,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:28:17,031 INFO L470 AbstractCegarLoop]: Abstraction has 2109 states and 7556 transitions. [2022-01-18 07:28:17,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:17,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 7556 transitions. [2022-01-18 07:28:17,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:28:17,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:28:17,036 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 07:28:17,058 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 07:28:17,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-18 07:28:17,258 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:28:17,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:28:17,258 INFO L85 PathProgramCache]: Analyzing trace with hash -188355452, now seen corresponding path program 10 times [2022-01-18 07:28:17,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:28:17,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727064090] [2022-01-18 07:28:17,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:28:17,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:28:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:28:17,440 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 07:28:17,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:28:17,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727064090] [2022-01-18 07:28:17,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727064090] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:28:17,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539374976] [2022-01-18 07:28:17,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:28:17,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:28:17,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:28:17,441 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 07:28:17,442 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 07:28:17,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:28:17,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:28:17,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 07:28:17,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:28:17,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:28:17,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:17,776 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 21 treesize of output 13 [2022-01-18 07:28:17,812 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 07:28:17,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:28:17,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:18,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:18,007 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 19 treesize of output 54 [2022-01-18 07:28:18,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:18,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:18,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:18,196 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 20 treesize of output 47 [2022-01-18 07:28:18,419 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 07:28:18,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539374976] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:28:18,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:28:18,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 07:28:18,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510632364] [2022-01-18 07:28:18,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:28:18,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 07:28:18,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:28:18,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 07:28:18,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-01-18 07:28:18,423 INFO L87 Difference]: Start difference. First operand 2109 states and 7556 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 07:28:20,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:28:20,233 INFO L93 Difference]: Finished difference Result 4248 states and 13899 transitions. [2022-01-18 07:28:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 07:28:20,233 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 07:28:20,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:28:20,254 INFO L225 Difference]: With dead ends: 4248 [2022-01-18 07:28:20,254 INFO L226 Difference]: Without dead ends: 4233 [2022-01-18 07:28:20,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=710, Invalid=2950, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 07:28:20,255 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 419 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 07:28:20,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 340 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1453 Invalid, 0 Unknown, 16 Unchecked, 0.7s Time] [2022-01-18 07:28:20,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4233 states. [2022-01-18 07:28:20,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4233 to 2123. [2022-01-18 07:28:20,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 3.5810556079170595) internal successors, (7599), 2122 states have internal predecessors, (7599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:20,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 7599 transitions. [2022-01-18 07:28:20,292 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 7599 transitions. Word has length 26 [2022-01-18 07:28:20,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:28:20,292 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 7599 transitions. [2022-01-18 07:28:20,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 07:28:20,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 7599 transitions. [2022-01-18 07:28:20,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:28:20,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:28:20,295 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 07:28:20,311 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 07:28:20,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:28:20,496 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:28:20,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:28:20,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2045752042, now seen corresponding path program 11 times [2022-01-18 07:28:20,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:28:20,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358766478] [2022-01-18 07:28:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:28:20,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:28:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:28:20,710 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 07:28:20,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:28:20,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358766478] [2022-01-18 07:28:20,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358766478] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:28:20,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258804456] [2022-01-18 07:28:20,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:28:20,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:28:20,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:28:20,712 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 07:28:20,713 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 07:28:20,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:28:20,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:28:20,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 07:28:20,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:28:21,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:28:21,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:21,045 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 24 treesize of output 16 [2022-01-18 07:28:21,077 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 07:28:21,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:28:21,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:21,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:21,286 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 19 treesize of output 54 [2022-01-18 07:28:21,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:21,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:21,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:21,460 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 20 treesize of output 47 [2022-01-18 07:28:21,767 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 07:28:21,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258804456] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:28:21,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:28:21,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 07:28:21,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675307850] [2022-01-18 07:28:21,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:28:21,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 07:28:21,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:28:21,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 07:28:21,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-01-18 07:28:21,768 INFO L87 Difference]: Start difference. First operand 2123 states and 7599 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:26,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:28:26,222 INFO L93 Difference]: Finished difference Result 4932 states and 15729 transitions. [2022-01-18 07:28:26,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-18 07:28:26,222 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:28:26,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:28:26,231 INFO L225 Difference]: With dead ends: 4932 [2022-01-18 07:28:26,231 INFO L226 Difference]: Without dead ends: 4895 [2022-01-18 07:28:26,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3808 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1415, Invalid=9505, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 07:28:26,232 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 605 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 2460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:28:26,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 543 Invalid, 2460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2213 Invalid, 0 Unknown, 114 Unchecked, 1.1s Time] [2022-01-18 07:28:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4895 states. [2022-01-18 07:28:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4895 to 2161. [2022-01-18 07:28:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 2160 states have (on average 3.5800925925925924) internal successors, (7733), 2160 states have internal predecessors, (7733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:26,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 7733 transitions. [2022-01-18 07:28:26,280 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 7733 transitions. Word has length 26 [2022-01-18 07:28:26,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:28:26,280 INFO L470 AbstractCegarLoop]: Abstraction has 2161 states and 7733 transitions. [2022-01-18 07:28:26,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:26,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 7733 transitions. [2022-01-18 07:28:26,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:28:26,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:28:26,284 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 07:28:26,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 07:28:26,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 07:28:26,494 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:28:26,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:28:26,494 INFO L85 PathProgramCache]: Analyzing trace with hash 625931212, now seen corresponding path program 12 times [2022-01-18 07:28:26,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:28:26,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949805997] [2022-01-18 07:28:26,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:28:26,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:28:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:28:26,664 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 07:28:26,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:28:26,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949805997] [2022-01-18 07:28:26,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949805997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:28:26,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671730137] [2022-01-18 07:28:26,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:28:26,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:28:26,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:28:26,665 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 07:28:26,666 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 07:28:26,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:28:26,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:28:26,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 07:28:26,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:28:26,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:26,949 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 24 treesize of output 32 [2022-01-18 07:28:27,127 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 07:28:27,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:28:27,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:27,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:27,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:27,362 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 19 treesize of output 46 [2022-01-18 07:28:27,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:27,404 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 20 treesize of output 5 [2022-01-18 07:28:27,576 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 07:28:27,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671730137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:28:27,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:28:27,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2022-01-18 07:28:27,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635085634] [2022-01-18 07:28:27,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:28:27,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 07:28:27,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:28:27,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 07:28:27,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-01-18 07:28:27,577 INFO L87 Difference]: Start difference. First operand 2161 states and 7733 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:31,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:28:31,184 INFO L93 Difference]: Finished difference Result 4609 states and 15323 transitions. [2022-01-18 07:28:31,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 07:28:31,184 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 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 07:28:31,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:28:31,192 INFO L225 Difference]: With dead ends: 4609 [2022-01-18 07:28:31,192 INFO L226 Difference]: Without dead ends: 4579 [2022-01-18 07:28:31,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1143, Invalid=5663, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 07:28:31,193 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 618 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:28:31,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 300 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 07:28:31,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2022-01-18 07:28:31,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 2180. [2022-01-18 07:28:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 3.5851307939421755) internal successors, (7812), 2179 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 7812 transitions. [2022-01-18 07:28:31,238 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 7812 transitions. Word has length 26 [2022-01-18 07:28:31,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:28:31,238 INFO L470 AbstractCegarLoop]: Abstraction has 2180 states and 7812 transitions. [2022-01-18 07:28:31,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:31,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 7812 transitions. [2022-01-18 07:28:31,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:28:31,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:28:31,242 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 07:28:31,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-18 07:28:31,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:28:31,443 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:28:31,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:28:31,443 INFO L85 PathProgramCache]: Analyzing trace with hash -633075064, now seen corresponding path program 13 times [2022-01-18 07:28:31,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:28:31,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270904342] [2022-01-18 07:28:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:28:31,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:28:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:28:31,633 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 07:28:31,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:28:31,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270904342] [2022-01-18 07:28:31,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270904342] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:28:31,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756278896] [2022-01-18 07:28:31,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:28:31,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:28:31,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:28:31,635 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 07:28:31,636 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 07:28:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:28:31,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 07:28:31,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:28:31,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:28:31,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:31,874 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 19 treesize of output 19 [2022-01-18 07:28:31,938 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 07:28:31,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:28:32,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:32,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:32,100 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 19 treesize of output 54 [2022-01-18 07:28:32,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:32,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:32,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:32,272 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 19 treesize of output 46 [2022-01-18 07:28:32,483 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 07:28:32,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756278896] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:28:32,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:28:32,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 07:28:32,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264488408] [2022-01-18 07:28:32,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:28:32,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 07:28:32,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:28:32,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 07:28:32,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-01-18 07:28:32,484 INFO L87 Difference]: Start difference. First operand 2180 states and 7812 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 07:28:35,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:28:35,603 INFO L93 Difference]: Finished difference Result 5385 states and 17692 transitions. [2022-01-18 07:28:35,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 07:28:35,603 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 26 [2022-01-18 07:28:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:28:35,613 INFO L225 Difference]: With dead ends: 5385 [2022-01-18 07:28:35,613 INFO L226 Difference]: Without dead ends: 5355 [2022-01-18 07:28:35,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2357 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1313, Invalid=5329, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 07:28:35,614 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 491 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1683 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 07:28:35,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 432 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1683 Invalid, 0 Unknown, 163 Unchecked, 0.9s Time] [2022-01-18 07:28:35,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5355 states. [2022-01-18 07:28:35,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5355 to 2218. [2022-01-18 07:28:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 3.6017140279657194) internal successors, (7985), 2217 states have internal predecessors, (7985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:35,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 7985 transitions. [2022-01-18 07:28:35,686 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 7985 transitions. Word has length 26 [2022-01-18 07:28:35,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:28:35,686 INFO L470 AbstractCegarLoop]: Abstraction has 2218 states and 7985 transitions. [2022-01-18 07:28:35,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 07:28:35,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 7985 transitions. [2022-01-18 07:28:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:28:35,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:28:35,690 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 07:28:35,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-01-18 07:28:35,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 07:28:35,891 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:28:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:28:35,891 INFO L85 PathProgramCache]: Analyzing trace with hash -609175150, now seen corresponding path program 14 times [2022-01-18 07:28:35,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:28:35,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814443034] [2022-01-18 07:28:35,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:28:35,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:28:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:28:36,079 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 07:28:36,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:28:36,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814443034] [2022-01-18 07:28:36,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814443034] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:28:36,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327026425] [2022-01-18 07:28:36,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:28:36,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:28:36,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:28:36,080 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 07:28:36,081 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 07:28:36,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:28:36,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:28:36,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 07:28:36,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:28:36,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:28:36,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:36,337 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 24 treesize of output 24 [2022-01-18 07:28:36,409 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 07:28:36,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:28:36,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:36,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:36,605 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 19 treesize of output 54 [2022-01-18 07:28:36,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:36,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:36,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:36,786 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 20 treesize of output 47 [2022-01-18 07:28:37,012 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 07:28:37,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327026425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:28:37,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:28:37,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-01-18 07:28:37,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373776387] [2022-01-18 07:28:37,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:28:37,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:28:37,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:28:37,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:28:37,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:28:37,013 INFO L87 Difference]: Start difference. First operand 2218 states and 7985 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 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 07:28:40,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:28:40,946 INFO L93 Difference]: Finished difference Result 5844 states and 18922 transitions. [2022-01-18 07:28:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 07:28:40,946 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 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 07:28:40,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:28:40,973 INFO L225 Difference]: With dead ends: 5844 [2022-01-18 07:28:40,974 INFO L226 Difference]: Without dead ends: 5814 [2022-01-18 07:28:40,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1521, Invalid=7221, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 07:28:40,974 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 581 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 2814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:28:40,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 661 Invalid, 2814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2353 Invalid, 0 Unknown, 324 Unchecked, 1.2s Time] [2022-01-18 07:28:40,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5814 states. [2022-01-18 07:28:41,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5814 to 2225. [2022-01-18 07:28:41,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2224 states have (on average 3.600269784172662) internal successors, (8007), 2224 states have internal predecessors, (8007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 8007 transitions. [2022-01-18 07:28:41,022 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 8007 transitions. Word has length 26 [2022-01-18 07:28:41,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:28:41,022 INFO L470 AbstractCegarLoop]: Abstraction has 2225 states and 8007 transitions. [2022-01-18 07:28:41,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 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 07:28:41,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 8007 transitions. [2022-01-18 07:28:41,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:28:41,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:28:41,025 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 07:28:41,043 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 07:28:41,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-01-18 07:28:41,226 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:28:41,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:28:41,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1129796424, now seen corresponding path program 15 times [2022-01-18 07:28:41,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:28:41,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871948106] [2022-01-18 07:28:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:28:41,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:28:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:28:41,410 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 07:28:41,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:28:41,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871948106] [2022-01-18 07:28:41,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871948106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:28:41,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108387653] [2022-01-18 07:28:41,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:28:41,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:28:41,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:28:41,411 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 07:28:41,412 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 07:28:41,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:28:41,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:28:41,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 07:28:41,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:28:41,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:28:41,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:41,704 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 19 treesize of output 11 [2022-01-18 07:28:41,734 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 07:28:41,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:28:41,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:41,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:41,907 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 19 treesize of output 54 [2022-01-18 07:28:42,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:42,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:42,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:42,061 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 20 treesize of output 47 [2022-01-18 07:28:42,289 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 07:28:42,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108387653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:28:42,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:28:42,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 07:28:42,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777566594] [2022-01-18 07:28:42,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:28:42,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 07:28:42,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:28:42,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 07:28:42,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-01-18 07:28:42,290 INFO L87 Difference]: Start difference. First operand 2225 states and 8007 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 07:28:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:28:44,788 INFO L93 Difference]: Finished difference Result 4509 states and 14824 transitions. [2022-01-18 07:28:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 07:28:44,789 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 07:28:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:28:44,796 INFO L225 Difference]: With dead ends: 4509 [2022-01-18 07:28:44,796 INFO L226 Difference]: Without dead ends: 4494 [2022-01-18 07:28:44,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1012, Invalid=3958, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 07:28:44,797 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 448 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 452 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 07:28:44,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 384 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1349 Invalid, 0 Unknown, 452 Unchecked, 0.7s Time] [2022-01-18 07:28:44,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2022-01-18 07:28:44,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 2231. [2022-01-18 07:28:44,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2230 states have (on average 3.602242152466368) internal successors, (8033), 2230 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:44,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 8033 transitions. [2022-01-18 07:28:44,839 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 8033 transitions. Word has length 26 [2022-01-18 07:28:44,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:28:44,839 INFO L470 AbstractCegarLoop]: Abstraction has 2231 states and 8033 transitions. [2022-01-18 07:28:44,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 07:28:44,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 8033 transitions. [2022-01-18 07:28:44,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:28:44,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:28:44,842 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 07:28:44,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 07:28:45,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:28:45,044 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:28:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:28:45,044 INFO L85 PathProgramCache]: Analyzing trace with hash 2114590172, now seen corresponding path program 16 times [2022-01-18 07:28:45,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:28:45,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906961721] [2022-01-18 07:28:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:28:45,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:28:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:28:45,236 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 07:28:45,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:28:45,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906961721] [2022-01-18 07:28:45,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906961721] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:28:45,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257037522] [2022-01-18 07:28:45,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:28:45,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:28:45,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:28:45,238 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 07:28:45,239 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 07:28:45,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:28:45,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:28:45,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 07:28:45,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:28:45,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:28:45,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:45,522 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 19 treesize of output 19 [2022-01-18 07:28:45,598 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 07:28:45,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:28:45,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:45,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:45,760 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 19 treesize of output 54 [2022-01-18 07:28:45,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:45,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:45,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:45,906 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 19 treesize of output 46 [2022-01-18 07:28:46,125 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 07:28:46,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257037522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:28:46,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:28:46,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 07:28:46,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734012137] [2022-01-18 07:28:46,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:28:46,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 07:28:46,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:28:46,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 07:28:46,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-01-18 07:28:46,126 INFO L87 Difference]: Start difference. First operand 2231 states and 8033 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:48,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:28:48,398 INFO L93 Difference]: Finished difference Result 4741 states and 15644 transitions. [2022-01-18 07:28:48,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 07:28:48,398 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 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 07:28:48,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:28:48,406 INFO L225 Difference]: With dead ends: 4741 [2022-01-18 07:28:48,406 INFO L226 Difference]: Without dead ends: 4726 [2022-01-18 07:28:48,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=911, Invalid=3511, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 07:28:48,407 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 600 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 2049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 641 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:28:48,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 449 Invalid, 2049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1218 Invalid, 0 Unknown, 641 Unchecked, 0.6s Time] [2022-01-18 07:28:48,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4726 states. [2022-01-18 07:28:48,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4726 to 2225. [2022-01-18 07:28:48,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2224 states have (on average 3.6011690647482015) internal successors, (8009), 2224 states have internal predecessors, (8009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 8009 transitions. [2022-01-18 07:28:48,447 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 8009 transitions. Word has length 26 [2022-01-18 07:28:48,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:28:48,447 INFO L470 AbstractCegarLoop]: Abstraction has 2225 states and 8009 transitions. [2022-01-18 07:28:48,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 8009 transitions. [2022-01-18 07:28:48,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:28:48,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:28:48,450 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 07:28:48,466 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 07:28:48,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 07:28:48,651 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:28:48,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:28:48,651 INFO L85 PathProgramCache]: Analyzing trace with hash 70439872, now seen corresponding path program 17 times [2022-01-18 07:28:48,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:28:48,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437165373] [2022-01-18 07:28:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:28:48,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:28:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:28:48,868 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 07:28:48,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:28:48,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437165373] [2022-01-18 07:28:48,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437165373] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:28:48,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897546391] [2022-01-18 07:28:48,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:28:48,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:28:48,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:28:48,872 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 07:28:48,873 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 07:28:48,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:28:48,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:28:48,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 07:28:48,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:28:49,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:28:49,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:28:49,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:49,186 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 27 treesize of output 23 [2022-01-18 07:28:49,245 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 07:28:49,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:28:49,452 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 07:28:49,453 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 19 treesize of output 54 [2022-01-18 07:28:49,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:49,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:49,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:49,599 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 20 treesize of output 47 [2022-01-18 07:28:49,790 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 07:28:49,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897546391] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:28:49,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:28:49,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 07:28:49,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919195850] [2022-01-18 07:28:49,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:28:49,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 07:28:49,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:28:49,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 07:28:49,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 07:28:49,792 INFO L87 Difference]: Start difference. First operand 2225 states and 8009 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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 07:28:52,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:28:52,036 INFO L93 Difference]: Finished difference Result 4091 states and 13736 transitions. [2022-01-18 07:28:52,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 07:28:52,036 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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 07:28:52,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:28:52,044 INFO L225 Difference]: With dead ends: 4091 [2022-01-18 07:28:52,044 INFO L226 Difference]: Without dead ends: 4076 [2022-01-18 07:28:52,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=625, Invalid=3931, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 07:28:52,045 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 252 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:28:52,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 439 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1759 Invalid, 0 Unknown, 82 Unchecked, 0.8s Time] [2022-01-18 07:28:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2022-01-18 07:28:52,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 2246. [2022-01-18 07:28:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2246 states, 2245 states have (on average 3.598218262806236) internal successors, (8078), 2245 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 8078 transitions. [2022-01-18 07:28:52,107 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 8078 transitions. Word has length 26 [2022-01-18 07:28:52,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:28:52,107 INFO L470 AbstractCegarLoop]: Abstraction has 2246 states and 8078 transitions. [2022-01-18 07:28:52,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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 07:28:52,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 8078 transitions. [2022-01-18 07:28:52,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:28:52,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:28:52,112 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 07:28:52,137 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 07:28:52,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 07:28:52,330 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:28:52,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:28:52,330 INFO L85 PathProgramCache]: Analyzing trace with hash -374279740, now seen corresponding path program 18 times [2022-01-18 07:28:52,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:28:52,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742681810] [2022-01-18 07:28:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:28:52,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:28:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:28:52,510 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 07:28:52,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:28:52,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742681810] [2022-01-18 07:28:52,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742681810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:28:52,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143795065] [2022-01-18 07:28:52,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:28:52,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:28:52,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:28:52,511 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 07:28:52,512 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 07:28:52,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:28:52,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:28:52,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 07:28:52,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:28:52,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:28:52,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:52,746 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 19 treesize of output 19 [2022-01-18 07:28:52,814 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 07:28:52,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:28:52,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:52,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:52,982 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 19 treesize of output 54 [2022-01-18 07:28:53,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:53,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:53,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:53,169 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 19 treesize of output 46 [2022-01-18 07:28:53,372 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 07:28:53,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143795065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:28:53,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:28:53,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 07:28:53,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080862399] [2022-01-18 07:28:53,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:28:53,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 07:28:53,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:28:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 07:28:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-18 07:28:53,373 INFO L87 Difference]: Start difference. First operand 2246 states and 8078 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 07:28:55,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:28:55,663 INFO L93 Difference]: Finished difference Result 4879 states and 15986 transitions. [2022-01-18 07:28:55,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 07:28:55,663 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 26 [2022-01-18 07:28:55,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:28:55,676 INFO L225 Difference]: With dead ends: 4879 [2022-01-18 07:28:55,676 INFO L226 Difference]: Without dead ends: 4811 [2022-01-18 07:28:55,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=863, Invalid=3829, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 07:28:55,677 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 428 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:28:55,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 411 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1247 Invalid, 0 Unknown, 397 Unchecked, 0.6s Time] [2022-01-18 07:28:55,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4811 states. [2022-01-18 07:28:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4811 to 2302. [2022-01-18 07:28:55,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 3.612342459800087) internal successors, (8312), 2301 states have internal predecessors, (8312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:55,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 8312 transitions. [2022-01-18 07:28:55,739 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 8312 transitions. Word has length 26 [2022-01-18 07:28:55,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:28:55,739 INFO L470 AbstractCegarLoop]: Abstraction has 2302 states and 8312 transitions. [2022-01-18 07:28:55,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 07:28:55,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 8312 transitions. [2022-01-18 07:28:55,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:28:55,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:28:55,743 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 07:28:55,763 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 07:28:55,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:28:55,956 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:28:55,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:28:55,957 INFO L85 PathProgramCache]: Analyzing trace with hash 347233680, now seen corresponding path program 19 times [2022-01-18 07:28:55,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:28:55,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124789118] [2022-01-18 07:28:55,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:28:55,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:28:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:28:56,168 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 07:28:56,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:28:56,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124789118] [2022-01-18 07:28:56,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124789118] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:28:56,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143364307] [2022-01-18 07:28:56,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:28:56,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:28:56,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:28:56,171 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:28:56,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 07:28:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:28:56,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 07:28:56,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:28:56,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:28:56,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:56,435 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 21 treesize of output 13 [2022-01-18 07:28:56,464 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 07:28:56,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:28:56,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:56,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:56,647 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 19 treesize of output 54 [2022-01-18 07:28:56,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:56,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:56,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:56,802 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 19 treesize of output 46 [2022-01-18 07:28:57,027 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 07:28:57,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143364307] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:28:57,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:28:57,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 07:28:57,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363338821] [2022-01-18 07:28:57,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:28:57,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 07:28:57,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:28:57,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 07:28:57,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 07:28:57,028 INFO L87 Difference]: Start difference. First operand 2302 states and 8312 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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 07:28:58,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:28:58,828 INFO L93 Difference]: Finished difference Result 4341 states and 14262 transitions. [2022-01-18 07:28:58,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 07:28:58,828 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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 26 [2022-01-18 07:28:58,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:28:58,835 INFO L225 Difference]: With dead ends: 4341 [2022-01-18 07:28:58,835 INFO L226 Difference]: Without dead ends: 4249 [2022-01-18 07:28:58,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=565, Invalid=2515, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 07:28:58,836 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 312 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 07:28:58,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 350 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 07:28:58,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4249 states. [2022-01-18 07:28:58,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4249 to 2427. [2022-01-18 07:28:58,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2426 states have (on average 3.5956306677658696) internal successors, (8723), 2426 states have internal predecessors, (8723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:28:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 8723 transitions. [2022-01-18 07:28:58,875 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 8723 transitions. Word has length 26 [2022-01-18 07:28:58,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:28:58,875 INFO L470 AbstractCegarLoop]: Abstraction has 2427 states and 8723 transitions. [2022-01-18 07:28:58,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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 07:28:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 8723 transitions. [2022-01-18 07:28:58,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:28:58,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:28:58,878 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 07:28:58,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 07:28:59,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:28:59,079 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:28:59,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:28:59,079 INFO L85 PathProgramCache]: Analyzing trace with hash -911772596, now seen corresponding path program 20 times [2022-01-18 07:28:59,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:28:59,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722238095] [2022-01-18 07:28:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:28:59,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:28:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:28:59,295 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 07:28:59,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:28:59,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722238095] [2022-01-18 07:28:59,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722238095] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:28:59,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957449055] [2022-01-18 07:28:59,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:28:59,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:28:59,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:28:59,300 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:28:59,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 07:28:59,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:28:59,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:28:59,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 07:28:59,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:28:59,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:28:59,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:28:59,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:59,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:28:59,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:59,543 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-01-18 07:28:59,628 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 07:28:59,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:28:59,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:28:59,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:28:59,833 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 19 treesize of output 54 [2022-01-18 07:29:00,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:29:00,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:29:00,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:29:00,017 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 19 treesize of output 46 [2022-01-18 07:29:00,214 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 07:29:00,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957449055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:29:00,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:29:00,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 07:29:00,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028612532] [2022-01-18 07:29:00,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:29:00,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 07:29:00,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:29:00,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 07:29:00,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-01-18 07:29:00,215 INFO L87 Difference]: Start difference. First operand 2427 states and 8723 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 07:29:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:29:02,464 INFO L93 Difference]: Finished difference Result 4824 states and 15724 transitions. [2022-01-18 07:29:02,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 07:29:02,464 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 26 [2022-01-18 07:29:02,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:29:02,472 INFO L225 Difference]: With dead ends: 4824 [2022-01-18 07:29:02,472 INFO L226 Difference]: Without dead ends: 4737 [2022-01-18 07:29:02,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=802, Invalid=3358, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 07:29:02,473 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 375 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 07:29:02,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 404 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1448 Invalid, 0 Unknown, 135 Unchecked, 0.7s Time] [2022-01-18 07:29:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4737 states. [2022-01-18 07:29:02,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4737 to 2424. [2022-01-18 07:29:02,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 3.5988444077589765) internal successors, (8720), 2423 states have internal predecessors, (8720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:29:02,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 8720 transitions. [2022-01-18 07:29:02,521 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 8720 transitions. Word has length 26 [2022-01-18 07:29:02,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:29:02,521 INFO L470 AbstractCegarLoop]: Abstraction has 2424 states and 8720 transitions. [2022-01-18 07:29:02,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 07:29:02,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 8720 transitions. [2022-01-18 07:29:02,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:29:02,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:29:02,525 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 07:29:02,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-01-18 07:29:02,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:29:02,725 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:29:02,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:29:02,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1454516880, now seen corresponding path program 21 times [2022-01-18 07:29:02,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:29:02,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411701937] [2022-01-18 07:29:02,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:29:02,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:29:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:29:02,963 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 07:29:02,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:29:02,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411701937] [2022-01-18 07:29:02,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411701937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:29:02,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510398298] [2022-01-18 07:29:02,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:29:02,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:29:02,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:29:02,968 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:29:02,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 07:29:02,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 07:29:02,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:29:02,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 07:29:02,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:29:03,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:29:03,234 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 24 treesize of output 32 Received shutdown request... [2022-01-18 07:38:55,561 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-18 07:38:55,563 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 07:38:55,571 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 07:38:55,571 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 07:38:55,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 07:38:55,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 07:38:55,775 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 3ms.. [2022-01-18 07:38:55,777 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 07:38:55,777 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 07:38:55,777 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 07:38:55,779 INFO L732 BasicCegarLoop]: Path program histogram: [36, 21, 1, 1, 1] [2022-01-18 07:38:55,781 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 07:38:55,781 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 07:38:55,783 INFO L202 PluginConnector]: Adding new model sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 07:38:55 BasicIcfg [2022-01-18 07:38:55,783 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 07:38:55,783 INFO L158 Benchmark]: Toolchain (without parser) took 733568.13ms. Allocated memory was 381.7MB in the beginning and 511.7MB in the end (delta: 130.0MB). Free memory was 339.2MB in the beginning and 288.3MB in the end (delta: 50.9MB). Peak memory consumption was 315.5MB. Max. memory is 16.0GB. [2022-01-18 07:38:55,783 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 381.7MB. Free memory is still 340.3MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 07:38:55,783 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.15ms. Allocated memory is still 381.7MB. Free memory was 339.1MB in the beginning and 337.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 07:38:55,785 INFO L158 Benchmark]: Boogie Preprocessor took 14.20ms. Allocated memory is still 381.7MB. Free memory was 337.6MB in the beginning and 336.7MB in the end (delta: 960.4kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 07:38:55,786 INFO L158 Benchmark]: RCFGBuilder took 197.08ms. Allocated memory is still 381.7MB. Free memory was 336.6MB in the beginning and 327.3MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 07:38:55,786 INFO L158 Benchmark]: TraceAbstraction took 733315.53ms. Allocated memory was 381.7MB in the beginning and 511.7MB in the end (delta: 130.0MB). Free memory was 326.8MB in the beginning and 288.3MB in the end (delta: 38.5MB). Peak memory consumption was 302.9MB. Max. memory is 16.0GB. [2022-01-18 07:38:55,786 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 0.13ms. Allocated memory is still 381.7MB. Free memory is still 340.3MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.15ms. Allocated memory is still 381.7MB. Free memory was 339.1MB in the beginning and 337.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 14.20ms. Allocated memory is still 381.7MB. Free memory was 337.6MB in the beginning and 336.7MB in the end (delta: 960.4kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 197.08ms. Allocated memory is still 381.7MB. Free memory was 336.6MB in the beginning and 327.3MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 733315.53ms. Allocated memory was 381.7MB in the beginning and 511.7MB in the end (delta: 130.0MB). Free memory was 326.8MB in the beginning and 288.3MB in the end (delta: 38.5MB). Peak memory consumption was 302.9MB. 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: 65]: 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 forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 3ms.. - TimeoutResultAtElement [Line: 58]: 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 forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 3ms.. - TimeoutResultAtElement [Line: 59]: 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 forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 3ms.. - TimeoutResultAtElement [Line: 58]: 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 forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 3ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 733.2s, OverallIterations: 60, TraceHistogramMax: 2, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.2s, AutomataDifference: 92.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 20016 SdHoareTripleChecker+Valid, 27.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 20016 mSDsluCounter, 15086 SdHoareTripleChecker+Invalid, 22.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 4069 IncrementalHoareTripleChecker+Unchecked, 26480 mSDsCounter, 4126 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 53701 IncrementalHoareTripleChecker+Invalid, 61896 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4126 mSolverCounterUnsat, 1450 mSDtfsCounter, 53701 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5450 GetRequests, 2111 SyntacticMatches, 159 SemanticMatches, 3180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84693 ImplicationChecksByTransitivity, 72.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2427occurred in iteration=58, InterpolantAutomatonStates: 2741, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.1s AutomataMinimizationTime, 59 MinimizatonAttempts, 101482 StatesRemovedByMinimization, 59 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 31.8s InterpolantComputationTime, 2802 NumberOfCodeBlocks, 2796 NumberOfCodeBlocksAsserted, 176 NumberOfCheckSat, 4003 ConstructedInterpolants, 29 QuantifiedInterpolants, 44605 SizeOfPredicates, 533 NumberOfNonLiveVariables, 3467 ConjunctsInSsa, 816 ConjunctsInUnsatCore, 171 InterpolantComputations, 3 PerfectInterpolantSequences, 174/848 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