/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/loop-tiling-eq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 04:09:56,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 04:09:56,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 04:09:56,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 04:09:56,848 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 04:09:56,869 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 04:09:56,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 04:09:56,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 04:09:56,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 04:09:56,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 04:09:56,871 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 04:09:56,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 04:09:56,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 04:09:56,872 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 04:09:56,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 04:09:56,872 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 04:09:56,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 04:09:56,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 04:09:56,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 04:09:56,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 04:09:56,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 04:09:56,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 04:09:56,873 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 04:09:56,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 04:09:56,873 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 04:09:56,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 04:09:56,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 04:09:56,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 04:09:56,873 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 04:09:56,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 04:09:56,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 04:09:56,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 04:09:56,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 04:09:56,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 04:09:56,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 04:09:56,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 04:09:56,875 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 04:09:56,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 04:09:56,875 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 04:09:57,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 04:09:57,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 04:09:57,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 04:09:57,058 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 04:09:57,059 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 04:09:57,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/loop-tiling-eq.wvr.bpl [2022-01-18 04:09:57,060 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/loop-tiling-eq.wvr.bpl' [2022-01-18 04:09:57,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 04:09:57,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 04:09:57,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 04:09:57,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 04:09:57,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 04:09:57,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:57" (1/1) ... [2022-01-18 04:09:57,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:57" (1/1) ... [2022-01-18 04:09:57,111 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 04:09:57,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 04:09:57,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 04:09:57,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 04:09:57,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 04:09:57,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:57" (1/1) ... [2022-01-18 04:09:57,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:57" (1/1) ... [2022-01-18 04:09:57,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:57" (1/1) ... [2022-01-18 04:09:57,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:57" (1/1) ... [2022-01-18 04:09:57,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:57" (1/1) ... [2022-01-18 04:09:57,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:57" (1/1) ... [2022-01-18 04:09:57,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:57" (1/1) ... [2022-01-18 04:09:57,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 04:09:57,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 04:09:57,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 04:09:57,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 04:09:57,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:57" (1/1) ... [2022-01-18 04:09:57,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 04:09:57,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:09:57,156 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 04:09:57,164 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 04:09:57,183 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 04:09:57,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 04:09:57,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 04:09:57,183 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 04:09:57,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 04:09:57,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 04:09:57,183 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 04:09:57,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 04:09:57,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 04:09:57,184 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 04:09:57,218 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 04:09:57,219 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 04:09:57,288 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 04:09:57,300 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 04:09:57,300 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-18 04:09:57,301 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-01-18 04:09:57,301 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-01-18 04:09:57,302 INFO L202 PluginConnector]: Adding new model loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:09:57 BoogieIcfgContainer [2022-01-18 04:09:57,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 04:09:57,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 04:09:57,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 04:09:57,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 04:09:57,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:57" (1/2) ... [2022-01-18 04:09:57,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65bf31b and model type loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 04:09:57, skipping insertion in model container [2022-01-18 04:09:57,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:09:57" (2/2) ... [2022-01-18 04:09:57,310 INFO L111 eAbstractionObserver]: Analyzing ICFG loop-tiling-eq.wvr.bpl [2022-01-18 04:09:57,313 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 04:09:57,313 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 04:09:57,313 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 04:09:57,313 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 04:09:57,356 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 04:09:57,384 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 04:09:57,394 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 04:09:57,394 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 04:09:57,403 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 22 places, 18 transitions, 52 flow [2022-01-18 04:09:57,414 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:57,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-18 04:09:57,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:09:57,426 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:09:57,435 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:09:57,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:09:57,439 INFO L85 PathProgramCache]: Analyzing trace with hash -37685515, now seen corresponding path program 1 times [2022-01-18 04:09:57,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:09:57,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930772519] [2022-01-18 04:09:57,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:09:57,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:09:57,495 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:09:57,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289862685] [2022-01-18 04:09:57,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:09:57,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:09:57,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:09:57,497 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 04:09:57,501 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 04:09:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:09:57,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 04:09:57,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:09:57,598 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 04:09:57,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 04:09:57,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:09:57,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930772519] [2022-01-18 04:09:57,599 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:09:57,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289862685] [2022-01-18 04:09:57,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289862685] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:09:57,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:09:57,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 04:09:57,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781035034] [2022-01-18 04:09:57,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:09:57,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 04:09:57,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:09:57,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 04:09:57,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 04:09:57,622 INFO L87 Difference]: Start difference. First operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 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 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:57,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:09:57,680 INFO L93 Difference]: Finished difference Result 36 states and 75 transitions. [2022-01-18 04:09:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 04:09:57,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-18 04:09:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:09:57,687 INFO L225 Difference]: With dead ends: 36 [2022-01-18 04:09:57,688 INFO L226 Difference]: Without dead ends: 31 [2022-01-18 04:09:57,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 04:09:57,691 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:09:57,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 13 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:09:57,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-18 04:09:57,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2022-01-18 04:09:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 54 transitions. [2022-01-18 04:09:57,737 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 54 transitions. Word has length 10 [2022-01-18 04:09:57,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:09:57,738 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 54 transitions. [2022-01-18 04:09:57,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:57,738 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 54 transitions. [2022-01-18 04:09:57,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-18 04:09:57,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:09:57,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:09:57,757 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 04:09:57,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-18 04:09:57,944 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:09:57,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:09:57,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1889973576, now seen corresponding path program 1 times [2022-01-18 04:09:57,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:09:57,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210222823] [2022-01-18 04:09:57,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:09:57,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:09:57,952 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:09:57,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666125396] [2022-01-18 04:09:57,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:09:57,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:09:57,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:09:57,957 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 04:09:57,958 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 04:09:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:09:57,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 04:09:57,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:09:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:58,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 04:09:58,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:09:58,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210222823] [2022-01-18 04:09:58,013 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:09:58,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666125396] [2022-01-18 04:09:58,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666125396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:09:58,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:09:58,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 04:09:58,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340703555] [2022-01-18 04:09:58,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:09:58,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 04:09:58,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:09:58,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 04:09:58,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 04:09:58,015 INFO L87 Difference]: Start difference. First operand 27 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:58,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:09:58,048 INFO L93 Difference]: Finished difference Result 44 states and 95 transitions. [2022-01-18 04:09:58,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 04:09:58,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-18 04:09:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:09:58,050 INFO L225 Difference]: With dead ends: 44 [2022-01-18 04:09:58,050 INFO L226 Difference]: Without dead ends: 31 [2022-01-18 04:09:58,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 04:09:58,051 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:09:58,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 14 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:09:58,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-18 04:09:58,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-18 04:09:58,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:58,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 62 transitions. [2022-01-18 04:09:58,055 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 62 transitions. Word has length 12 [2022-01-18 04:09:58,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:09:58,055 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 62 transitions. [2022-01-18 04:09:58,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 62 transitions. [2022-01-18 04:09:58,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 04:09:58,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:09:58,056 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:09:58,079 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 04:09:58,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-01-18 04:09:58,272 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:09:58,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:09:58,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1513355744, now seen corresponding path program 1 times [2022-01-18 04:09:58,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:09:58,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058050931] [2022-01-18 04:09:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:09:58,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:09:58,279 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:09:58,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704842265] [2022-01-18 04:09:58,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:09:58,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:09:58,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:09:58,281 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 04:09:58,284 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 04:09:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:09:58,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 04:09:58,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:09:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:58,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:09:58,674 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 04:09:58,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:09:58,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058050931] [2022-01-18 04:09:58,675 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:09:58,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704842265] [2022-01-18 04:09:58,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704842265] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:09:58,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:09:58,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2022-01-18 04:09:58,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458340338] [2022-01-18 04:09:58,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:09:58,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 04:09:58,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:09:58,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 04:09:58,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-01-18 04:09:58,678 INFO L87 Difference]: Start difference. First operand 31 states and 62 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 04:09:58,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:09:58,794 INFO L93 Difference]: Finished difference Result 63 states and 124 transitions. [2022-01-18 04:09:58,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:09:58,795 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 13 [2022-01-18 04:09:58,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:09:58,795 INFO L225 Difference]: With dead ends: 63 [2022-01-18 04:09:58,795 INFO L226 Difference]: Without dead ends: 38 [2022-01-18 04:09:58,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:09:58,796 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 51 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:09:58,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 24 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 94 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-01-18 04:09:58,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-18 04:09:58,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-18 04:09:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:58,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 77 transitions. [2022-01-18 04:09:58,801 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 77 transitions. Word has length 13 [2022-01-18 04:09:58,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:09:58,801 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 77 transitions. [2022-01-18 04:09:58,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 04:09:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 77 transitions. [2022-01-18 04:09:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:09:58,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:09:58,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:09:58,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-18 04:09:59,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:09:59,016 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:09:59,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:09:59,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1697008076, now seen corresponding path program 1 times [2022-01-18 04:09:59,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:09:59,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437771146] [2022-01-18 04:09:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:09:59,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:09:59,024 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:09:59,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946485238] [2022-01-18 04:09:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:09:59,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:09:59,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:09:59,026 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 04:09:59,027 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 04:09:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:09:59,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:09:59,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:09:59,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:09:59,135 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:09:59,135 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 23 treesize of output 20 [2022-01-18 04:09:59,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 04:09:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:59,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:09:59,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 42 [2022-01-18 04:09:59,841 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:09:59,841 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 12 treesize of output 12 [2022-01-18 04:09:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:59,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:09:59,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437771146] [2022-01-18 04:09:59,844 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:09:59,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946485238] [2022-01-18 04:09:59,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946485238] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:09:59,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:09:59,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-01-18 04:09:59,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022446745] [2022-01-18 04:09:59,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:09:59,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:09:59,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:09:59,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:09:59,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:09:59,846 INFO L87 Difference]: Start difference. First operand 38 states and 77 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:59,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:09:59,973 INFO L93 Difference]: Finished difference Result 66 states and 132 transitions. [2022-01-18 04:09:59,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:09:59,973 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:09:59,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:09:59,974 INFO L225 Difference]: With dead ends: 66 [2022-01-18 04:09:59,974 INFO L226 Difference]: Without dead ends: 63 [2022-01-18 04:09:59,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:09:59,975 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:09:59,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 31 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 188 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2022-01-18 04:09:59,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-18 04:09:59,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2022-01-18 04:09:59,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:59,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 102 transitions. [2022-01-18 04:09:59,979 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 102 transitions. Word has length 14 [2022-01-18 04:09:59,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:09:59,979 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 102 transitions. [2022-01-18 04:09:59,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:59,979 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 102 transitions. [2022-01-18 04:09:59,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:09:59,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:09:59,980 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:09:59,996 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 04:10:00,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:00,187 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:10:00,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:10:00,188 INFO L85 PathProgramCache]: Analyzing trace with hash 714269624, now seen corresponding path program 2 times [2022-01-18 04:10:00,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:10:00,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591462014] [2022-01-18 04:10:00,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:10:00,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:10:00,192 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:10:00,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285945778] [2022-01-18 04:10:00,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:10:00,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:00,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:10:00,194 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 04:10:00,195 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 04:10:00,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:10:00,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:10:00,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:10:00,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:10:00,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:10:00,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:10:00,297 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 17 treesize of output 13 [2022-01-18 04:10:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:00,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:10:00,454 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 40 treesize of output 34 [2022-01-18 04:10:00,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:00,878 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 31 treesize of output 36 [2022-01-18 04:10:00,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:10:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:01,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:10:01,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591462014] [2022-01-18 04:10:01,447 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:10:01,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285945778] [2022-01-18 04:10:01,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285945778] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:10:01,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:10:01,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-01-18 04:10:01,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355060718] [2022-01-18 04:10:01,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:10:01,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:10:01,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:10:01,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:10:01,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:10:01,448 INFO L87 Difference]: Start difference. First operand 48 states and 102 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:01,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:10:01,509 INFO L93 Difference]: Finished difference Result 60 states and 123 transitions. [2022-01-18 04:10:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:10:01,509 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:10:01,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:10:01,510 INFO L225 Difference]: With dead ends: 60 [2022-01-18 04:10:01,510 INFO L226 Difference]: Without dead ends: 57 [2022-01-18 04:10:01,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:10:01,511 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:10:01,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 116 Unchecked, 0.0s Time] [2022-01-18 04:10:01,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-18 04:10:01,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2022-01-18 04:10:01,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.173076923076923) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:01,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 113 transitions. [2022-01-18 04:10:01,514 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 113 transitions. Word has length 14 [2022-01-18 04:10:01,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:10:01,515 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 113 transitions. [2022-01-18 04:10:01,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:01,515 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 113 transitions. [2022-01-18 04:10:01,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:10:01,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:10:01,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:10:01,543 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 04:10:01,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:01,732 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:10:01,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:10:01,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1862353966, now seen corresponding path program 3 times [2022-01-18 04:10:01,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:10:01,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001393030] [2022-01-18 04:10:01,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:10:01,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:10:01,737 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:10:01,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431595865] [2022-01-18 04:10:01,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:10:01,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:01,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:10:01,738 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 04:10:01,739 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 04:10:01,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:10:01,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:10:01,762 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 04:10:01,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:10:01,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:10:01,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:10:01,826 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 17 treesize of output 13 [2022-01-18 04:10:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:01,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:10:06,296 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 40 treesize of output 34 [2022-01-18 04:10:11,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:11,460 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 31 treesize of output 36 [2022-01-18 04:10:11,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:10:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:13,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:10:13,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001393030] [2022-01-18 04:10:13,212 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:10:13,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431595865] [2022-01-18 04:10:13,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431595865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:10:13,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:10:13,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-01-18 04:10:13,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126098540] [2022-01-18 04:10:13,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:10:13,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:10:13,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:10:13,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:10:13,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=201, Unknown=3, NotChecked=0, Total=272 [2022-01-18 04:10:13,213 INFO L87 Difference]: Start difference. First operand 53 states and 113 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:13,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:10:13,335 INFO L93 Difference]: Finished difference Result 82 states and 180 transitions. [2022-01-18 04:10:13,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 04:10:13,335 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:10:13,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:10:13,336 INFO L225 Difference]: With dead ends: 82 [2022-01-18 04:10:13,336 INFO L226 Difference]: Without dead ends: 79 [2022-01-18 04:10:13,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=68, Invalid=201, Unknown=3, NotChecked=0, Total=272 [2022-01-18 04:10:13,337 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:10:13,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 25 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 134 Unchecked, 0.1s Time] [2022-01-18 04:10:13,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-18 04:10:13,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 54. [2022-01-18 04:10:13,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:13,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 117 transitions. [2022-01-18 04:10:13,340 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 117 transitions. Word has length 14 [2022-01-18 04:10:13,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:10:13,341 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 117 transitions. [2022-01-18 04:10:13,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:13,341 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 117 transitions. [2022-01-18 04:10:13,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:10:13,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:10:13,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:10:13,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-18 04:10:13,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:13,549 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:10:13,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:10:13,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1973176486, now seen corresponding path program 4 times [2022-01-18 04:10:13,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:10:13,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482481142] [2022-01-18 04:10:13,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:10:13,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:10:13,553 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:10:13,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609190462] [2022-01-18 04:10:13,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:10:13,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:13,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:10:13,555 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 04:10:13,556 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 04:10:13,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:10:13,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:10:13,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:10:13,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:10:13,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:10:13,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:10:13,860 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 17 treesize of output 13 [2022-01-18 04:10:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:14,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:10:14,586 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 40 treesize of output 34 [2022-01-18 04:10:15,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:15,593 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 31 treesize of output 36 [2022-01-18 04:10:15,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:10:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:17,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:10:17,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482481142] [2022-01-18 04:10:17,583 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:10:17,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609190462] [2022-01-18 04:10:17,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609190462] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:10:17,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:10:17,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-01-18 04:10:17,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228653845] [2022-01-18 04:10:17,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:10:17,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:10:17,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:10:17,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:10:17,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:10:17,584 INFO L87 Difference]: Start difference. First operand 54 states and 117 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:10:18,052 INFO L93 Difference]: Finished difference Result 73 states and 159 transitions. [2022-01-18 04:10:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:10:18,052 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:10:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:10:18,054 INFO L225 Difference]: With dead ends: 73 [2022-01-18 04:10:18,054 INFO L226 Difference]: Without dead ends: 70 [2022-01-18 04:10:18,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:10:18,055 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:10:18,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 25 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 132 Unchecked, 0.4s Time] [2022-01-18 04:10:18,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-18 04:10:18,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 55. [2022-01-18 04:10:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 54 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 119 transitions. [2022-01-18 04:10:18,066 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 119 transitions. Word has length 14 [2022-01-18 04:10:18,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:10:18,066 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 119 transitions. [2022-01-18 04:10:18,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:18,067 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 119 transitions. [2022-01-18 04:10:18,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:10:18,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:10:18,067 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:10:18,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 04:10:18,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:18,268 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:10:18,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:10:18,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1966920376, now seen corresponding path program 5 times [2022-01-18 04:10:18,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:10:18,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247613864] [2022-01-18 04:10:18,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:10:18,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:10:18,272 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:10:18,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601989960] [2022-01-18 04:10:18,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:10:18,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:18,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:10:18,273 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 04:10:18,274 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 04:10:18,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:10:18,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:10:18,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:10:18,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:10:18,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:10:18,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:10:18,575 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 17 treesize of output 13 [2022-01-18 04:10:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:18,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:10:19,266 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 40 treesize of output 34 [2022-01-18 04:10:20,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:20,423 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 31 treesize of output 36 [2022-01-18 04:10:20,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:10:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:22,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:10:22,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247613864] [2022-01-18 04:10:22,603 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:10:22,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601989960] [2022-01-18 04:10:22,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601989960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:10:22,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:10:22,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-01-18 04:10:22,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481973474] [2022-01-18 04:10:22,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:10:22,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:10:22,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:10:22,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:10:22,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:10:22,604 INFO L87 Difference]: Start difference. First operand 55 states and 119 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:22,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:10:22,921 INFO L93 Difference]: Finished difference Result 89 states and 193 transitions. [2022-01-18 04:10:22,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:10:22,921 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:10:22,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:10:22,922 INFO L225 Difference]: With dead ends: 89 [2022-01-18 04:10:22,922 INFO L226 Difference]: Without dead ends: 87 [2022-01-18 04:10:22,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:10:22,923 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:10:22,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-01-18 04:10:22,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-18 04:10:22,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2022-01-18 04:10:22,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.25) internal successors, (135), 60 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:22,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 135 transitions. [2022-01-18 04:10:22,926 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 135 transitions. Word has length 14 [2022-01-18 04:10:22,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:10:22,926 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 135 transitions. [2022-01-18 04:10:22,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:22,926 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 135 transitions. [2022-01-18 04:10:22,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:10:22,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:10:22,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:10:22,943 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 04:10:23,139 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,SelfDestructingSolverStorable7 [2022-01-18 04:10:23,139 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:10:23,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:10:23,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1843919940, now seen corresponding path program 6 times [2022-01-18 04:10:23,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:10:23,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295253031] [2022-01-18 04:10:23,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:10:23,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:10:23,144 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:10:23,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299846761] [2022-01-18 04:10:23,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:10:23,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:23,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:10:23,145 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 04:10:23,145 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 04:10:23,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:10:23,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:10:23,176 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 04:10:23,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:10:23,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 04:10:23,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:10:23,381 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 17 treesize of output 13 [2022-01-18 04:10:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:23,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:10:24,769 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 40 treesize of output 34 [2022-01-18 04:10:26,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:26,244 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 31 treesize of output 36 [2022-01-18 04:10:26,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:10:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:31,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:10:31,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295253031] [2022-01-18 04:10:31,220 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:10:31,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299846761] [2022-01-18 04:10:31,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299846761] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:10:31,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:10:31,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:10:31,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265627251] [2022-01-18 04:10:31,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:10:31,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:10:31,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:10:31,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:10:31,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:10:31,222 INFO L87 Difference]: Start difference. First operand 61 states and 135 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:31,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:10:31,828 INFO L93 Difference]: Finished difference Result 100 states and 207 transitions. [2022-01-18 04:10:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:10:31,828 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:10:31,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:10:31,829 INFO L225 Difference]: With dead ends: 100 [2022-01-18 04:10:31,829 INFO L226 Difference]: Without dead ends: 97 [2022-01-18 04:10:31,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:10:31,830 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:10:31,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 52 Unchecked, 0.4s Time] [2022-01-18 04:10:31,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-18 04:10:31,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 63. [2022-01-18 04:10:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.306451612903226) internal successors, (143), 62 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:31,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 143 transitions. [2022-01-18 04:10:31,833 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 143 transitions. Word has length 14 [2022-01-18 04:10:31,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:10:31,833 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 143 transitions. [2022-01-18 04:10:31,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:31,833 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 143 transitions. [2022-01-18 04:10:31,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:10:31,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:10:31,833 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:10:31,850 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 04:10:32,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:32,043 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:10:32,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:10:32,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1954742460, now seen corresponding path program 7 times [2022-01-18 04:10:32,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:10:32,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500925692] [2022-01-18 04:10:32,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:10:32,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:10:32,050 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:10:32,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590565477] [2022-01-18 04:10:32,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:10:32,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:32,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:10:32,051 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 04:10:32,052 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 04:10:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:10:32,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:10:32,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:10:32,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:10:32,311 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:10:32,311 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 20 treesize of output 17 [2022-01-18 04:10:32,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-18 04:10:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:32,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:10:33,358 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 40 treesize of output 34 [2022-01-18 04:10:34,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:34,097 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 31 treesize of output 36 [2022-01-18 04:10:34,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:10:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:36,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:10:36,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500925692] [2022-01-18 04:10:36,155 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:10:36,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590565477] [2022-01-18 04:10:36,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590565477] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:10:36,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:10:36,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-01-18 04:10:36,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271039063] [2022-01-18 04:10:36,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:10:36,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:10:36,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:10:36,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:10:36,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:10:36,156 INFO L87 Difference]: Start difference. First operand 63 states and 143 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:36,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:10:36,744 INFO L93 Difference]: Finished difference Result 85 states and 183 transitions. [2022-01-18 04:10:36,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:10:36,745 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:10:36,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:10:36,746 INFO L225 Difference]: With dead ends: 85 [2022-01-18 04:10:36,746 INFO L226 Difference]: Without dead ends: 82 [2022-01-18 04:10:36,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:10:36,746 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:10:36,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 34 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 188 Invalid, 0 Unknown, 122 Unchecked, 0.5s Time] [2022-01-18 04:10:36,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-18 04:10:36,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2022-01-18 04:10:36,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 63 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:36,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 147 transitions. [2022-01-18 04:10:36,749 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 147 transitions. Word has length 14 [2022-01-18 04:10:36,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:10:36,749 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 147 transitions. [2022-01-18 04:10:36,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:36,750 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 147 transitions. [2022-01-18 04:10:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:10:36,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:10:36,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:10:36,775 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 04:10:36,967 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,SelfDestructingSolverStorable9 [2022-01-18 04:10:36,967 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:10:36,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:10:36,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1481944952, now seen corresponding path program 8 times [2022-01-18 04:10:36,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:10:36,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700090465] [2022-01-18 04:10:36,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:10:36,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:10:36,971 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:10:36,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531051809] [2022-01-18 04:10:36,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:10:36,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:36,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:10:36,972 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 04:10:36,979 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 04:10:37,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:10:37,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:10:37,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:10:37,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:10:37,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:10:37,208 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:10:37,208 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 20 treesize of output 17 [2022-01-18 04:10:37,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-18 04:10:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:37,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:10:38,157 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 40 treesize of output 34 [2022-01-18 04:10:38,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:38,875 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 31 treesize of output 36 [2022-01-18 04:10:38,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:10:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:41,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:10:41,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700090465] [2022-01-18 04:10:41,078 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:10:41,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531051809] [2022-01-18 04:10:41,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531051809] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:10:41,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:10:41,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-01-18 04:10:41,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361139898] [2022-01-18 04:10:41,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:10:41,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:10:41,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:10:41,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:10:41,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:10:41,080 INFO L87 Difference]: Start difference. First operand 64 states and 147 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:41,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:10:41,576 INFO L93 Difference]: Finished difference Result 84 states and 185 transitions. [2022-01-18 04:10:41,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:10:41,576 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:10:41,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:10:41,577 INFO L225 Difference]: With dead ends: 84 [2022-01-18 04:10:41,577 INFO L226 Difference]: Without dead ends: 81 [2022-01-18 04:10:41,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:10:41,577 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:10:41,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 27 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 162 Invalid, 0 Unknown, 214 Unchecked, 0.4s Time] [2022-01-18 04:10:41,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-18 04:10:41,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2022-01-18 04:10:41,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.278688524590164) internal successors, (139), 61 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 139 transitions. [2022-01-18 04:10:41,580 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 139 transitions. Word has length 14 [2022-01-18 04:10:41,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:10:41,580 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 139 transitions. [2022-01-18 04:10:41,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:41,580 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 139 transitions. [2022-01-18 04:10:41,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:10:41,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:10:41,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:10:41,596 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 04:10:41,796 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,SelfDestructingSolverStorable10 [2022-01-18 04:10:41,796 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:10:41,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:10:41,797 INFO L85 PathProgramCache]: Analyzing trace with hash -527762636, now seen corresponding path program 9 times [2022-01-18 04:10:41,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:10:41,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93242199] [2022-01-18 04:10:41,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:10:41,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:10:41,800 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:10:41,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10272216] [2022-01-18 04:10:41,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:10:41,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:41,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:10:41,801 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 04:10:41,802 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 04:10:41,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:10:41,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:10:41,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 04:10:41,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:10:41,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:10:42,055 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:10:42,056 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 23 treesize of output 20 [2022-01-18 04:10:42,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 04:10:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:42,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:10:51,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 42 [2022-01-18 04:10:55,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:55,359 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 27 treesize of output 32 [2022-01-18 04:10:55,433 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 37 treesize of output 31 [2022-01-18 04:10:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:57,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:10:57,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93242199] [2022-01-18 04:10:57,710 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:10:57,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10272216] [2022-01-18 04:10:57,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10272216] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:10:57,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:10:57,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-01-18 04:10:57,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159830822] [2022-01-18 04:10:57,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:10:57,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:10:57,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:10:57,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:10:57,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=197, Unknown=5, NotChecked=0, Total=272 [2022-01-18 04:10:57,711 INFO L87 Difference]: Start difference. First operand 62 states and 139 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:00,034 WARN L860 $PredicateComparison]: unable to prove that (and (or (not (= c_L (* c_N c_M))) (forall ((b Int) (a Int)) (or (not (<= 0 b)) (= (select c_A (+ b (* a c_M))) (select (select c_B a) b)) (not (<= 0 a)) (not (< a c_N)) (not (< b c_M))))) (or (forall ((b Int) (a Int)) (or (not (<= 0 b)) (= (select c_A (+ b (* a c_M))) (select (select c_B a) b)) (not (<= 0 a)) (not (< b c_M)) (not (< a (div c_L c_M))))) (< c_x c_L) (< c_j c_M) (< (+ c_i 1) (div c_L c_M)) (not (= (mod c_L c_M) 0)))) is different from true [2022-01-18 04:11:00,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:11:00,267 INFO L93 Difference]: Finished difference Result 105 states and 229 transitions. [2022-01-18 04:11:00,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 04:11:00,267 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:11:00,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:11:00,268 INFO L225 Difference]: With dead ends: 105 [2022-01-18 04:11:00,268 INFO L226 Difference]: Without dead ends: 97 [2022-01-18 04:11:00,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=102, Invalid=316, Unknown=6, NotChecked=38, Total=462 [2022-01-18 04:11:00,268 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:11:00,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 17 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 166 Unchecked, 0.2s Time] [2022-01-18 04:11:00,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-18 04:11:00,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 69. [2022-01-18 04:11:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.3823529411764706) internal successors, (162), 68 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 162 transitions. [2022-01-18 04:11:00,272 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 162 transitions. Word has length 14 [2022-01-18 04:11:00,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:11:00,272 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 162 transitions. [2022-01-18 04:11:00,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 162 transitions. [2022-01-18 04:11:00,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:11:00,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:11:00,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:11:00,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-18 04:11:00,489 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,SelfDestructingSolverStorable11 [2022-01-18 04:11:00,489 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:11:00,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:11:00,489 INFO L85 PathProgramCache]: Analyzing trace with hash -638585156, now seen corresponding path program 10 times [2022-01-18 04:11:00,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:11:00,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984708924] [2022-01-18 04:11:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:11:00,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:11:00,493 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:11:00,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471052509] [2022-01-18 04:11:00,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:11:00,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:00,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:11:00,494 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 04:11:00,494 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 04:11:00,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:11:00,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:11:00,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:11:00,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:11:00,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:11:00,707 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:11:00,707 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 23 treesize of output 20 [2022-01-18 04:11:00,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 04:11:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:00,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:11:01,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 42 [2022-01-18 04:11:02,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:11:02,660 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 27 treesize of output 32 [2022-01-18 04:11:02,678 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 37 treesize of output 31 [2022-01-18 04:11:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:04,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:11:04,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984708924] [2022-01-18 04:11:04,892 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:11:04,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471052509] [2022-01-18 04:11:04,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471052509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:11:04,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:11:04,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-01-18 04:11:04,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029056783] [2022-01-18 04:11:04,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:11:04,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:11:04,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:11:04,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:11:04,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:11:04,893 INFO L87 Difference]: Start difference. First operand 69 states and 162 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:05,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:11:05,262 INFO L93 Difference]: Finished difference Result 85 states and 189 transitions. [2022-01-18 04:11:05,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:11:05,262 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:11:05,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:11:05,263 INFO L225 Difference]: With dead ends: 85 [2022-01-18 04:11:05,263 INFO L226 Difference]: Without dead ends: 82 [2022-01-18 04:11:05,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:11:05,263 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:11:05,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 22 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 170 Unchecked, 0.3s Time] [2022-01-18 04:11:05,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-18 04:11:05,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2022-01-18 04:11:05,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.353846153846154) internal successors, (153), 65 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:05,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 153 transitions. [2022-01-18 04:11:05,266 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 153 transitions. Word has length 14 [2022-01-18 04:11:05,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:11:05,266 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 153 transitions. [2022-01-18 04:11:05,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:05,266 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 153 transitions. [2022-01-18 04:11:05,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:11:05,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:11:05,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:11:05,288 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 04:11:05,479 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,SelfDestructingSolverStorable12 [2022-01-18 04:11:05,479 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:11:05,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:11:05,480 INFO L85 PathProgramCache]: Analyzing trace with hash 545322744, now seen corresponding path program 11 times [2022-01-18 04:11:05,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:11:05,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676183364] [2022-01-18 04:11:05,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:11:05,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:11:05,484 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:11:05,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388575116] [2022-01-18 04:11:05,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:11:05,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:05,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:11:05,485 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 04:11:05,486 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 04:11:05,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:11:05,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:11:05,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:11:05,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:11:05,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:11:05,685 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:11:05,685 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 23 treesize of output 20 [2022-01-18 04:11:05,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 04:11:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:05,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:11:06,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 42 [2022-01-18 04:11:08,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:11:08,128 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 22 treesize of output 27 [2022-01-18 04:11:08,145 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 34 treesize of output 28 [2022-01-18 04:11:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:09,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:11:09,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676183364] [2022-01-18 04:11:09,368 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:11:09,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388575116] [2022-01-18 04:11:09,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388575116] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:11:09,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:11:09,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-01-18 04:11:09,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518770964] [2022-01-18 04:11:09,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:11:09,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:11:09,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:11:09,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:11:09,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:11:09,369 INFO L87 Difference]: Start difference. First operand 66 states and 153 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:09,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:11:09,921 INFO L93 Difference]: Finished difference Result 94 states and 214 transitions. [2022-01-18 04:11:09,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:11:09,922 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:11:09,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:11:09,922 INFO L225 Difference]: With dead ends: 94 [2022-01-18 04:11:09,922 INFO L226 Difference]: Without dead ends: 91 [2022-01-18 04:11:09,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:11:09,923 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 38 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:11:09,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 22 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 184 Unchecked, 0.4s Time] [2022-01-18 04:11:09,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-18 04:11:09,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2022-01-18 04:11:09,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.373134328358209) internal successors, (159), 67 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:09,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 159 transitions. [2022-01-18 04:11:09,925 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 159 transitions. Word has length 14 [2022-01-18 04:11:09,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:11:09,925 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 159 transitions. [2022-01-18 04:11:09,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:09,925 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 159 transitions. [2022-01-18 04:11:09,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:11:09,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:11:09,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:11:09,942 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 04:11:10,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:10,142 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:11:10,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:11:10,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2065847762, now seen corresponding path program 12 times [2022-01-18 04:11:10,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:11:10,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469883895] [2022-01-18 04:11:10,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:11:10,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:11:10,145 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:11:10,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942501900] [2022-01-18 04:11:10,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:11:10,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:10,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:11:10,147 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 04:11:10,148 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 04:11:10,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:11:10,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:11:10,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:11:10,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:11:10,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:11:10,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:11:10,488 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 17 treesize of output 13 [2022-01-18 04:11:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:10,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:11:11,084 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 40 treesize of output 34 [2022-01-18 04:11:13,355 INFO L353 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-01-18 04:11:13,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2022-01-18 04:11:13,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:11:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:13,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:11:13,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469883895] [2022-01-18 04:11:13,730 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:11:13,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942501900] [2022-01-18 04:11:13,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942501900] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:11:13,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:11:13,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:11:13,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66739701] [2022-01-18 04:11:13,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:11:13,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:11:13,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:11:13,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:11:13,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:11:13,732 INFO L87 Difference]: Start difference. First operand 68 states and 159 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:14,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:11:14,165 INFO L93 Difference]: Finished difference Result 118 states and 263 transitions. [2022-01-18 04:11:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:11:14,166 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:11:14,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:11:14,167 INFO L225 Difference]: With dead ends: 118 [2022-01-18 04:11:14,167 INFO L226 Difference]: Without dead ends: 115 [2022-01-18 04:11:14,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:11:14,167 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:11:14,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 45 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2022-01-18 04:11:14,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-18 04:11:14,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 72. [2022-01-18 04:11:14,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.3661971830985915) internal successors, (168), 71 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:14,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 168 transitions. [2022-01-18 04:11:14,170 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 168 transitions. Word has length 14 [2022-01-18 04:11:14,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:11:14,170 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 168 transitions. [2022-01-18 04:11:14,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:14,170 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 168 transitions. [2022-01-18 04:11:14,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:11:14,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:11:14,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:11:14,186 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 04:11:14,375 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,SelfDestructingSolverStorable14 [2022-01-18 04:11:14,375 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:11:14,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:11:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2084281788, now seen corresponding path program 13 times [2022-01-18 04:11:14,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:11:14,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215164687] [2022-01-18 04:11:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:11:14,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:11:14,379 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:11:14,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715098744] [2022-01-18 04:11:14,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:11:14,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:14,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:11:14,380 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 04:11:14,381 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 04:11:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:11:14,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:11:14,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:11:14,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:11:14,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:11:14,725 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 17 treesize of output 13 [2022-01-18 04:11:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:14,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:11:15,325 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 40 treesize of output 34 [2022-01-18 04:11:17,517 INFO L353 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-01-18 04:11:17,517 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 31 treesize of output 31 [2022-01-18 04:11:17,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:11:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:17,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:11:17,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215164687] [2022-01-18 04:11:17,874 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:11:17,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715098744] [2022-01-18 04:11:17,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715098744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:11:17,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:11:17,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:11:17,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50791283] [2022-01-18 04:11:17,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:11:17,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:11:17,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:11:17,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:11:17,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:11:17,875 INFO L87 Difference]: Start difference. First operand 72 states and 168 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:18,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:11:18,563 INFO L93 Difference]: Finished difference Result 117 states and 264 transitions. [2022-01-18 04:11:18,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:11:18,564 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:11:18,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:11:18,565 INFO L225 Difference]: With dead ends: 117 [2022-01-18 04:11:18,565 INFO L226 Difference]: Without dead ends: 114 [2022-01-18 04:11:18,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:11:18,565 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:11:18,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 46 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 94 Unchecked, 0.6s Time] [2022-01-18 04:11:18,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-18 04:11:18,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 73. [2022-01-18 04:11:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.375) internal successors, (171), 72 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 171 transitions. [2022-01-18 04:11:18,567 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 171 transitions. Word has length 14 [2022-01-18 04:11:18,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:11:18,567 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 171 transitions. [2022-01-18 04:11:18,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 171 transitions. [2022-01-18 04:11:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:11:18,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:11:18,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:11:18,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 04:11:18,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 04:11:18,785 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:11:18,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:11:18,785 INFO L85 PathProgramCache]: Analyzing trace with hash -492341802, now seen corresponding path program 14 times [2022-01-18 04:11:18,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:11:18,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945140453] [2022-01-18 04:11:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:11:18,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:11:18,788 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:11:18,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129124149] [2022-01-18 04:11:18,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:11:18,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:18,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:11:18,790 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 04:11:18,792 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 04:11:18,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:11:18,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:11:18,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:11:18,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:11:18,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:11:19,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:11:19,067 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 17 treesize of output 13 [2022-01-18 04:11:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:19,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:11:19,840 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 40 treesize of output 34 [2022-01-18 04:11:21,665 INFO L353 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-01-18 04:11:21,666 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 31 treesize of output 31 [2022-01-18 04:11:21,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:11:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:22,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:11:22,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945140453] [2022-01-18 04:11:22,015 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:11:22,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129124149] [2022-01-18 04:11:22,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129124149] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:11:22,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:11:22,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:11:22,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128277958] [2022-01-18 04:11:22,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:11:22,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:11:22,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:11:22,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:11:22,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:11:22,016 INFO L87 Difference]: Start difference. First operand 73 states and 171 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:22,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:11:22,852 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2022-01-18 04:11:22,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 04:11:22,853 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:11:22,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:11:22,854 INFO L225 Difference]: With dead ends: 143 [2022-01-18 04:11:22,854 INFO L226 Difference]: Without dead ends: 140 [2022-01-18 04:11:22,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:11:22,855 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:11:22,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 48 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 107 Unchecked, 0.5s Time] [2022-01-18 04:11:22,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-18 04:11:22,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 72. [2022-01-18 04:11:22,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.3661971830985915) internal successors, (168), 71 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:22,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 168 transitions. [2022-01-18 04:11:22,857 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 168 transitions. Word has length 14 [2022-01-18 04:11:22,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:11:22,857 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 168 transitions. [2022-01-18 04:11:22,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:22,857 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 168 transitions. [2022-01-18 04:11:22,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:11:22,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:11:22,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:11:22,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-18 04:11:23,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 04:11:23,062 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:11:23,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:11:23,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1166331598, now seen corresponding path program 15 times [2022-01-18 04:11:23,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:11:23,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761560381] [2022-01-18 04:11:23,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:11:23,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:11:23,065 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:11:23,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049045693] [2022-01-18 04:11:23,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:11:23,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:23,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:11:23,066 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 04:11:23,067 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 04:11:23,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:11:23,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:11:23,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:11:23,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:11:23,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:11:23,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:11:23,433 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 17 treesize of output 13 [2022-01-18 04:11:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:23,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:11:24,057 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 40 treesize of output 34 [2022-01-18 04:11:26,355 INFO L353 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-01-18 04:11:26,356 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 31 treesize of output 31 [2022-01-18 04:11:26,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:11:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:26,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:11:26,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761560381] [2022-01-18 04:11:26,691 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:11:26,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049045693] [2022-01-18 04:11:26,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049045693] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:11:26,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:11:26,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:11:26,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781861134] [2022-01-18 04:11:26,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:11:26,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:11:26,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:11:26,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:11:26,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:11:26,692 INFO L87 Difference]: Start difference. First operand 72 states and 168 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:27,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:11:27,183 INFO L93 Difference]: Finished difference Result 96 states and 222 transitions. [2022-01-18 04:11:27,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:11:27,184 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:11:27,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:11:27,184 INFO L225 Difference]: With dead ends: 96 [2022-01-18 04:11:27,184 INFO L226 Difference]: Without dead ends: 93 [2022-01-18 04:11:27,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:11:27,185 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:11:27,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 117 Unchecked, 0.4s Time] [2022-01-18 04:11:27,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-18 04:11:27,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2022-01-18 04:11:27,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.3835616438356166) internal successors, (174), 73 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:27,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 174 transitions. [2022-01-18 04:11:27,187 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 174 transitions. Word has length 14 [2022-01-18 04:11:27,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:11:27,187 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 174 transitions. [2022-01-18 04:11:27,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:27,187 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 174 transitions. [2022-01-18 04:11:27,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:11:27,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:11:27,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:11:27,203 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 04:11:27,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 04:11:27,395 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:11:27,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:11:27,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1410291992, now seen corresponding path program 16 times [2022-01-18 04:11:27,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:11:27,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714071109] [2022-01-18 04:11:27,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:11:27,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:11:27,398 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:11:27,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094066414] [2022-01-18 04:11:27,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:11:27,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:27,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:11:27,399 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 04:11:27,402 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 04:11:27,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:11:27,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:11:27,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:11:27,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:11:27,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:11:27,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:11:27,702 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 17 treesize of output 13 [2022-01-18 04:11:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:27,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:11:28,532 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 40 treesize of output 34 [2022-01-18 04:11:30,424 INFO L353 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-01-18 04:11:30,424 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 31 treesize of output 31 [2022-01-18 04:11:30,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:11:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:30,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:11:30,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714071109] [2022-01-18 04:11:30,764 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:11:30,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094066414] [2022-01-18 04:11:30,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094066414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:11:30,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:11:30,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:11:30,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112434354] [2022-01-18 04:11:30,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:11:30,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:11:30,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:11:30,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:11:30,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:11:30,765 INFO L87 Difference]: Start difference. First operand 74 states and 174 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:31,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:11:31,351 INFO L93 Difference]: Finished difference Result 106 states and 247 transitions. [2022-01-18 04:11:31,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:11:31,352 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:11:31,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:11:31,353 INFO L225 Difference]: With dead ends: 106 [2022-01-18 04:11:31,353 INFO L226 Difference]: Without dead ends: 103 [2022-01-18 04:11:31,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:11:31,353 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:11:31,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 38 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 188 Invalid, 0 Unknown, 92 Unchecked, 0.5s Time] [2022-01-18 04:11:31,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-18 04:11:31,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 73. [2022-01-18 04:11:31,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.375) internal successors, (171), 72 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:31,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 171 transitions. [2022-01-18 04:11:31,355 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 171 transitions. Word has length 14 [2022-01-18 04:11:31,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:11:31,355 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 171 transitions. [2022-01-18 04:11:31,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:31,356 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 171 transitions. [2022-01-18 04:11:31,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:11:31,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:11:31,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:11:31,375 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 04:11:31,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:31,561 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:11:31,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:11:31,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1391857966, now seen corresponding path program 17 times [2022-01-18 04:11:31,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:11:31,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069786189] [2022-01-18 04:11:31,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:11:31,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:11:31,564 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:11:31,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450626025] [2022-01-18 04:11:31,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:11:31,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:31,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:11:31,565 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 04:11:31,565 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 04:11:31,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:11:31,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:11:31,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 04:11:31,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:11:31,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:11:31,787 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:11:31,787 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 20 treesize of output 17 [2022-01-18 04:11:31,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-18 04:11:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:32,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:11:32,909 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 40 treesize of output 34 [2022-01-18 04:11:34,466 INFO L353 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-01-18 04:11:34,466 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 31 treesize of output 31 [2022-01-18 04:11:34,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:11:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:34,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:11:34,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069786189] [2022-01-18 04:11:34,780 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:11:34,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450626025] [2022-01-18 04:11:34,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450626025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:11:34,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:11:34,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:11:34,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377811288] [2022-01-18 04:11:34,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:11:34,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:11:34,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:11:34,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:11:34,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:11:34,781 INFO L87 Difference]: Start difference. First operand 73 states and 171 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:35,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:11:35,329 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2022-01-18 04:11:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:11:35,329 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:11:35,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:11:35,330 INFO L225 Difference]: With dead ends: 101 [2022-01-18 04:11:35,330 INFO L226 Difference]: Without dead ends: 98 [2022-01-18 04:11:35,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:11:35,331 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:11:35,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 42 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 239 Unchecked, 0.4s Time] [2022-01-18 04:11:35,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-18 04:11:35,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2022-01-18 04:11:35,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.3972602739726026) internal successors, (175), 73 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 175 transitions. [2022-01-18 04:11:35,332 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 175 transitions. Word has length 14 [2022-01-18 04:11:35,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:11:35,333 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 175 transitions. [2022-01-18 04:11:35,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:35,333 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 175 transitions. [2022-01-18 04:11:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:11:35,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:11:35,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:11:35,353 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 04:11:35,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:35,547 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:11:35,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:11:35,548 INFO L85 PathProgramCache]: Analyzing trace with hash 90620442, now seen corresponding path program 18 times [2022-01-18 04:11:35,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:11:35,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333839377] [2022-01-18 04:11:35,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:11:35,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:11:35,551 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:11:35,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333368964] [2022-01-18 04:11:35,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:11:35,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:35,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:11:35,552 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 04:11:35,552 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 04:11:35,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:11:35,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:11:35,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:11:35,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:11:35,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:11:35,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:11:35,892 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 17 treesize of output 13 [2022-01-18 04:11:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:36,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:11:36,500 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 40 treesize of output 34 [2022-01-18 04:11:38,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:11:38,205 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 31 treesize of output 36 [2022-01-18 04:11:38,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:11:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:39,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:11:39,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333839377] [2022-01-18 04:11:39,881 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:11:39,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333368964] [2022-01-18 04:11:39,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333368964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:11:39,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:11:39,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:11:39,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519106164] [2022-01-18 04:11:39,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:11:39,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:11:39,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:11:39,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:11:39,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:11:39,882 INFO L87 Difference]: Start difference. First operand 74 states and 175 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:40,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:11:40,284 INFO L93 Difference]: Finished difference Result 94 states and 216 transitions. [2022-01-18 04:11:40,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:11:40,285 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:11:40,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:11:40,286 INFO L225 Difference]: With dead ends: 94 [2022-01-18 04:11:40,286 INFO L226 Difference]: Without dead ends: 91 [2022-01-18 04:11:40,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:11:40,286 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:11:40,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 27 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 96 Unchecked, 0.3s Time] [2022-01-18 04:11:40,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-18 04:11:40,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2022-01-18 04:11:40,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.4078947368421053) internal successors, (183), 76 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:40,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 183 transitions. [2022-01-18 04:11:40,288 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 183 transitions. Word has length 14 [2022-01-18 04:11:40,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:11:40,288 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 183 transitions. [2022-01-18 04:11:40,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:40,288 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 183 transitions. [2022-01-18 04:11:40,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:11:40,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:11:40,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:11:40,306 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 04:11:40,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:40,490 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:11:40,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:11:40,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1808964148, now seen corresponding path program 19 times [2022-01-18 04:11:40,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:11:40,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714670088] [2022-01-18 04:11:40,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:11:40,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:11:40,493 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:11:40,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820590952] [2022-01-18 04:11:40,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:11:40,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:40,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:11:40,498 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 04:11:40,498 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 04:11:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:11:40,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:11:40,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:11:40,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:11:40,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:11:40,776 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 17 treesize of output 13 [2022-01-18 04:11:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:40,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:11:41,592 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 40 treesize of output 34 [2022-01-18 04:11:43,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:11:43,014 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 31 treesize of output 36 [2022-01-18 04:11:43,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:11:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:44,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:11:44,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714670088] [2022-01-18 04:11:44,639 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:11:44,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820590952] [2022-01-18 04:11:44,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820590952] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:11:44,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:11:44,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:11:44,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48721147] [2022-01-18 04:11:44,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:11:44,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:11:44,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:11:44,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:11:44,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:11:44,640 INFO L87 Difference]: Start difference. First operand 77 states and 183 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:45,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:11:45,354 INFO L93 Difference]: Finished difference Result 103 states and 238 transitions. [2022-01-18 04:11:45,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:11:45,355 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:11:45,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:11:45,356 INFO L225 Difference]: With dead ends: 103 [2022-01-18 04:11:45,356 INFO L226 Difference]: Without dead ends: 100 [2022-01-18 04:11:45,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:11:45,356 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 04:11:45,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 239 Invalid, 0 Unknown, 155 Unchecked, 0.7s Time] [2022-01-18 04:11:45,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-18 04:11:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 76. [2022-01-18 04:11:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.4) internal successors, (180), 75 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 180 transitions. [2022-01-18 04:11:45,358 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 180 transitions. Word has length 14 [2022-01-18 04:11:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:11:45,358 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 180 transitions. [2022-01-18 04:11:45,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 180 transitions. [2022-01-18 04:11:45,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:11:45,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:11:45,359 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:11:45,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 04:11:45,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:45,569 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:11:45,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:11:45,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1827398174, now seen corresponding path program 20 times [2022-01-18 04:11:45,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:11:45,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659753729] [2022-01-18 04:11:45,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:11:45,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:11:45,573 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:11:45,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983598078] [2022-01-18 04:11:45,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:11:45,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:45,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:11:45,574 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 04:11:45,575 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 04:11:45,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:11:45,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:11:45,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:11:45,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:11:45,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:11:45,819 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:11:45,819 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 20 treesize of output 17 [2022-01-18 04:11:45,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-18 04:11:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:46,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:11:46,867 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 40 treesize of output 34 [2022-01-18 04:11:47,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:11:47,632 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 31 treesize of output 36 [2022-01-18 04:11:47,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:11:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:49,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:11:49,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659753729] [2022-01-18 04:11:49,358 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:11:49,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983598078] [2022-01-18 04:11:49,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983598078] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:11:49,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:11:49,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:11:49,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341422288] [2022-01-18 04:11:49,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:11:49,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:11:49,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:11:49,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:11:49,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:11:49,359 INFO L87 Difference]: Start difference. First operand 76 states and 180 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:11:49,870 INFO L93 Difference]: Finished difference Result 98 states and 228 transitions. [2022-01-18 04:11:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:11:49,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:11:49,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:11:49,872 INFO L225 Difference]: With dead ends: 98 [2022-01-18 04:11:49,872 INFO L226 Difference]: Without dead ends: 95 [2022-01-18 04:11:49,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:11:49,872 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:11:49,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 29 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 128 Unchecked, 0.5s Time] [2022-01-18 04:11:49,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-18 04:11:49,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2022-01-18 04:11:49,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.391891891891892) internal successors, (177), 74 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:49,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 177 transitions. [2022-01-18 04:11:49,874 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 177 transitions. Word has length 14 [2022-01-18 04:11:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:11:49,874 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 177 transitions. [2022-01-18 04:11:49,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 177 transitions. [2022-01-18 04:11:49,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:11:49,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:11:49,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:11:49,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 04:11:50,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:50,081 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:11:50,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:11:50,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1151411818, now seen corresponding path program 21 times [2022-01-18 04:11:50,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:11:50,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447290465] [2022-01-18 04:11:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:11:50,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:11:50,085 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:11:50,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604120653] [2022-01-18 04:11:50,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:11:50,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:50,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:11:50,086 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 04:11:50,087 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 04:11:50,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:11:50,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:11:50,113 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 04:11:50,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:11:50,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:11:50,339 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:11:50,340 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 23 treesize of output 20 [2022-01-18 04:11:50,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 04:11:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:50,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:12:00,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 42 [2022-01-18 04:12:04,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:12:04,137 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 27 treesize of output 32 [2022-01-18 04:12:04,243 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 37 treesize of output 31 [2022-01-18 04:12:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:07,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:12:07,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447290465] [2022-01-18 04:12:07,090 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:12:07,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604120653] [2022-01-18 04:12:07,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604120653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:12:07,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:12:07,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-18 04:12:07,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191530599] [2022-01-18 04:12:07,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:12:07,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:12:07,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:12:07,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:12:07,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=223, Unknown=5, NotChecked=0, Total=306 [2022-01-18 04:12:07,091 INFO L87 Difference]: Start difference. First operand 75 states and 177 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:15,703 WARN L860 $PredicateComparison]: unable to prove that (and (or (not (= c_L (* c_N c_M))) (forall ((b Int) (a Int)) (or (not (<= 0 b)) (= (select c_A (+ b (* a c_M))) (select (select c_B a) b)) (not (<= 0 a)) (not (< a c_N)) (not (< b c_M))))) (or (< c_i (div c_L c_M)) (forall ((b Int) (a Int)) (or (not (<= 0 b)) (= (select c_A (+ b (* a c_M))) (select (select c_B a) b)) (not (<= 0 a)) (not (< b c_M)) (not (< a (div c_L c_M))))) (< c_x c_L) (not (= (mod c_L c_M) 0)))) is different from true [2022-01-18 04:12:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:12:15,763 INFO L93 Difference]: Finished difference Result 117 states and 270 transitions. [2022-01-18 04:12:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 04:12:15,763 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:12:15,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:12:15,764 INFO L225 Difference]: With dead ends: 117 [2022-01-18 04:12:15,764 INFO L226 Difference]: Without dead ends: 111 [2022-01-18 04:12:15,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=110, Invalid=305, Unknown=9, NotChecked=38, Total=462 [2022-01-18 04:12:15,764 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:12:15,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 25 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 139 Unchecked, 0.3s Time] [2022-01-18 04:12:15,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-18 04:12:15,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 76. [2022-01-18 04:12:15,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.3866666666666667) internal successors, (179), 75 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:15,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 179 transitions. [2022-01-18 04:12:15,766 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 179 transitions. Word has length 14 [2022-01-18 04:12:15,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:12:15,767 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 179 transitions. [2022-01-18 04:12:15,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:15,767 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 179 transitions. [2022-01-18 04:12:15,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:12:15,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:12:15,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:12:15,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 04:12:15,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:12:15,975 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:12:15,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:12:15,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1262234338, now seen corresponding path program 22 times [2022-01-18 04:12:15,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:12:15,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971744354] [2022-01-18 04:12:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:12:15,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:12:15,979 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:12:15,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589798479] [2022-01-18 04:12:15,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:12:15,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:12:15,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:12:15,980 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 04:12:15,981 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 04:12:16,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:12:16,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:12:16,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:12:16,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:12:16,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:12:16,201 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:12:16,202 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 23 treesize of output 20 [2022-01-18 04:12:16,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 04:12:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:16,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:12:17,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 42 [2022-01-18 04:12:18,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:12:18,342 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 27 treesize of output 32 [2022-01-18 04:12:18,359 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 37 treesize of output 31 [2022-01-18 04:12:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:20,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:12:20,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971744354] [2022-01-18 04:12:20,197 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:12:20,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589798479] [2022-01-18 04:12:20,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589798479] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:12:20,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:12:20,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:12:20,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150531212] [2022-01-18 04:12:20,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:12:20,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:12:20,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:12:20,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:12:20,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:12:20,198 INFO L87 Difference]: Start difference. First operand 76 states and 179 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:20,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:12:20,435 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2022-01-18 04:12:20,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:12:20,436 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:12:20,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:12:20,436 INFO L225 Difference]: With dead ends: 98 [2022-01-18 04:12:20,436 INFO L226 Difference]: Without dead ends: 95 [2022-01-18 04:12:20,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:12:20,437 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:12:20,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 21 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-01-18 04:12:20,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-18 04:12:20,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2022-01-18 04:12:20,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.4177215189873418) internal successors, (191), 79 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:20,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 191 transitions. [2022-01-18 04:12:20,439 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 191 transitions. Word has length 14 [2022-01-18 04:12:20,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:12:20,439 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 191 transitions. [2022-01-18 04:12:20,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:20,439 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 191 transitions. [2022-01-18 04:12:20,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:12:20,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:12:20,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:12:20,455 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 04:12:20,655 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,SelfDestructingSolverStorable24 [2022-01-18 04:12:20,656 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:12:20,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:12:20,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1255978228, now seen corresponding path program 23 times [2022-01-18 04:12:20,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:12:20,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523358162] [2022-01-18 04:12:20,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:12:20,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:12:20,659 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:12:20,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713324411] [2022-01-18 04:12:20,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:12:20,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:12:20,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:12:20,660 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 04:12:20,661 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 04:12:20,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:12:20,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:12:20,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:12:20,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:12:20,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:12:20,872 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:12:20,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2022-01-18 04:12:20,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 04:12:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:21,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:12:22,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 42 [2022-01-18 04:12:23,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:12:23,068 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 27 treesize of output 32 [2022-01-18 04:12:23,087 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 37 treesize of output 31 [2022-01-18 04:12:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:24,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:12:24,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523358162] [2022-01-18 04:12:24,841 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:12:24,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713324411] [2022-01-18 04:12:24,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713324411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:12:24,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:12:24,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:12:24,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654054332] [2022-01-18 04:12:24,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:12:24,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:12:24,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:12:24,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:12:24,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:12:24,842 INFO L87 Difference]: Start difference. First operand 80 states and 191 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:25,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:12:25,252 INFO L93 Difference]: Finished difference Result 99 states and 223 transitions. [2022-01-18 04:12:25,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:12:25,253 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:12:25,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:12:25,253 INFO L225 Difference]: With dead ends: 99 [2022-01-18 04:12:25,253 INFO L226 Difference]: Without dead ends: 97 [2022-01-18 04:12:25,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:12:25,254 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:12:25,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 64 Unchecked, 0.4s Time] [2022-01-18 04:12:25,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-18 04:12:25,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 77. [2022-01-18 04:12:25,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.3947368421052633) internal successors, (182), 76 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:25,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 182 transitions. [2022-01-18 04:12:25,257 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 182 transitions. Word has length 14 [2022-01-18 04:12:25,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:12:25,257 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 182 transitions. [2022-01-18 04:12:25,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:25,257 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 182 transitions. [2022-01-18 04:12:25,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:12:25,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:12:25,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:12:25,273 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 04:12:25,458 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,SelfDestructingSolverStorable25 [2022-01-18 04:12:25,458 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:12:25,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:12:25,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2097562734, now seen corresponding path program 24 times [2022-01-18 04:12:25,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:12:25,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519231644] [2022-01-18 04:12:25,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:12:25,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:12:25,462 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:12:25,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950660426] [2022-01-18 04:12:25,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:12:25,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:12:25,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:12:25,463 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 04:12:25,465 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 04:12:25,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:12:25,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:12:25,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:12:25,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:12:25,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:12:25,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:12:25,821 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 17 treesize of output 13 [2022-01-18 04:12:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:25,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:12:26,506 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 40 treesize of output 34 [2022-01-18 04:12:28,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:12:28,603 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 31 treesize of output 36 [2022-01-18 04:12:28,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:12:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:30,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:12:30,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519231644] [2022-01-18 04:12:30,949 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:12:30,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950660426] [2022-01-18 04:12:30,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950660426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:12:30,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:12:30,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:12:30,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448058192] [2022-01-18 04:12:30,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:12:30,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:12:30,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:12:30,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:12:30,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:12:30,950 INFO L87 Difference]: Start difference. First operand 77 states and 182 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:31,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:12:31,553 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2022-01-18 04:12:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:12:31,554 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:12:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:12:31,554 INFO L225 Difference]: With dead ends: 97 [2022-01-18 04:12:31,554 INFO L226 Difference]: Without dead ends: 94 [2022-01-18 04:12:31,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:12:31,555 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:12:31,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 28 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 183 Invalid, 0 Unknown, 169 Unchecked, 0.5s Time] [2022-01-18 04:12:31,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-18 04:12:31,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2022-01-18 04:12:31,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.41025641025641) internal successors, (188), 78 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:31,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 188 transitions. [2022-01-18 04:12:31,557 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 188 transitions. Word has length 14 [2022-01-18 04:12:31,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:12:31,557 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 188 transitions. [2022-01-18 04:12:31,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:31,557 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 188 transitions. [2022-01-18 04:12:31,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:12:31,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:12:31,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:12:31,573 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 04:12:31,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 04:12:31,768 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:12:31,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:12:31,768 INFO L85 PathProgramCache]: Analyzing trace with hash -379219028, now seen corresponding path program 25 times [2022-01-18 04:12:31,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:12:31,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359784266] [2022-01-18 04:12:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:12:31,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:12:31,775 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:12:31,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431803025] [2022-01-18 04:12:31,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:12:31,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:12:31,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:12:31,776 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 04:12:31,776 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 04:12:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:12:31,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:12:31,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:12:31,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:12:32,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:12:32,062 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 17 treesize of output 13 [2022-01-18 04:12:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:32,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:12:33,016 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 40 treesize of output 34 [2022-01-18 04:12:34,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:12:34,351 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 31 treesize of output 36 [2022-01-18 04:12:34,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:12:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:36,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:12:36,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359784266] [2022-01-18 04:12:36,534 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:12:36,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431803025] [2022-01-18 04:12:36,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431803025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:12:36,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:12:36,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:12:36,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98185433] [2022-01-18 04:12:36,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:12:36,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:12:36,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:12:36,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:12:36,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:12:36,535 INFO L87 Difference]: Start difference. First operand 79 states and 188 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:37,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:12:37,200 INFO L93 Difference]: Finished difference Result 107 states and 250 transitions. [2022-01-18 04:12:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:12:37,201 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:12:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:12:37,201 INFO L225 Difference]: With dead ends: 107 [2022-01-18 04:12:37,201 INFO L226 Difference]: Without dead ends: 104 [2022-01-18 04:12:37,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:12:37,202 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:12:37,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 27 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 160 Unchecked, 0.6s Time] [2022-01-18 04:12:37,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-18 04:12:37,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 78. [2022-01-18 04:12:37,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.4025974025974026) internal successors, (185), 77 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:37,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 185 transitions. [2022-01-18 04:12:37,204 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 185 transitions. Word has length 14 [2022-01-18 04:12:37,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:12:37,204 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 185 transitions. [2022-01-18 04:12:37,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:37,204 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 185 transitions. [2022-01-18 04:12:37,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:12:37,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:12:37,204 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:12:37,220 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 04:12:37,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 04:12:37,415 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:12:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:12:37,416 INFO L85 PathProgramCache]: Analyzing trace with hash -360785002, now seen corresponding path program 26 times [2022-01-18 04:12:37,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:12:37,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793409376] [2022-01-18 04:12:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:12:37,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:12:37,419 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:12:37,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308572799] [2022-01-18 04:12:37,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:12:37,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:12:37,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:12:37,424 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 04:12:37,425 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 04:12:37,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:12:37,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:12:37,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:12:37,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:12:37,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:12:37,660 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:12:37,660 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 20 treesize of output 17 [2022-01-18 04:12:37,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-18 04:12:37,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:37,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:12:38,822 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 40 treesize of output 34 [2022-01-18 04:12:39,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:12:39,900 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 31 treesize of output 36 [2022-01-18 04:12:39,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:12:42,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:42,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:12:42,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793409376] [2022-01-18 04:12:42,331 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:12:42,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308572799] [2022-01-18 04:12:42,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308572799] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:12:42,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:12:42,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:12:42,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811724187] [2022-01-18 04:12:42,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:12:42,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:12:42,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:12:42,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:12:42,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:12:42,333 INFO L87 Difference]: Start difference. First operand 78 states and 185 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:42,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:12:42,997 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2022-01-18 04:12:42,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:12:42,998 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:12:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:12:42,998 INFO L225 Difference]: With dead ends: 103 [2022-01-18 04:12:42,998 INFO L226 Difference]: Without dead ends: 100 [2022-01-18 04:12:42,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:12:42,999 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:12:42,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 177 Invalid, 0 Unknown, 61 Unchecked, 0.5s Time] [2022-01-18 04:12:42,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-18 04:12:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 77. [2022-01-18 04:12:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.3947368421052633) internal successors, (182), 76 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:43,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 182 transitions. [2022-01-18 04:12:43,001 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 182 transitions. Word has length 14 [2022-01-18 04:12:43,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:12:43,001 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 182 transitions. [2022-01-18 04:12:43,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:43,001 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 182 transitions. [2022-01-18 04:12:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:12:43,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:12:43,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:12:43,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 04:12:43,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 04:12:43,211 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:12:43,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:12:43,212 INFO L85 PathProgramCache]: Analyzing trace with hash 844549782, now seen corresponding path program 27 times [2022-01-18 04:12:43,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:12:43,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749847016] [2022-01-18 04:12:43,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:12:43,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:12:43,215 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:12:43,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435369884] [2022-01-18 04:12:43,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:12:43,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:12:43,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:12:43,216 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 04:12:43,217 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 04:12:43,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:12:43,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:12:43,245 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:12:43,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:12:43,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:12:43,445 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:12:43,446 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 23 treesize of output 20 [2022-01-18 04:12:43,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 04:12:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:43,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:12:44,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 42 [2022-01-18 04:12:46,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:12:46,889 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 27 treesize of output 32 [2022-01-18 04:12:46,909 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 37 treesize of output 31 [2022-01-18 04:12:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:49,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:12:49,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749847016] [2022-01-18 04:12:49,970 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:12:49,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435369884] [2022-01-18 04:12:49,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435369884] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:12:49,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:12:49,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-18 04:12:49,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683327227] [2022-01-18 04:12:49,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:12:49,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:12:49,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:12:49,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:12:49,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:12:49,971 INFO L87 Difference]: Start difference. First operand 77 states and 182 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:12:50,572 INFO L93 Difference]: Finished difference Result 114 states and 261 transitions. [2022-01-18 04:12:50,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 04:12:50,573 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:12:50,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:12:50,574 INFO L225 Difference]: With dead ends: 114 [2022-01-18 04:12:50,574 INFO L226 Difference]: Without dead ends: 108 [2022-01-18 04:12:50,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:12:50,574 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:12:50,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 20 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 87 Unchecked, 0.4s Time] [2022-01-18 04:12:50,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-18 04:12:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 78. [2022-01-18 04:12:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.4025974025974026) internal successors, (185), 77 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 185 transitions. [2022-01-18 04:12:50,577 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 185 transitions. Word has length 14 [2022-01-18 04:12:50,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:12:50,578 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 185 transitions. [2022-01-18 04:12:50,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:50,578 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 185 transitions. [2022-01-18 04:12:50,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:12:50,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:12:50,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:12:50,595 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 04:12:50,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:12:50,791 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:12:50,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:12:50,792 INFO L85 PathProgramCache]: Analyzing trace with hash 4703924, now seen corresponding path program 28 times [2022-01-18 04:12:50,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:12:50,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123318945] [2022-01-18 04:12:50,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:12:50,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:12:50,795 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:12:50,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091805941] [2022-01-18 04:12:50,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:12:50,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:12:50,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:12:50,796 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 04:12:50,797 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 04:12:50,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:12:50,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:12:50,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:12:50,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:12:50,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:12:51,023 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:12:51,024 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 23 treesize of output 20 [2022-01-18 04:12:51,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 04:12:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:51,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:12:52,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 42 [2022-01-18 04:12:53,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:12:53,846 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 27 treesize of output 32 [2022-01-18 04:12:53,882 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 37 treesize of output 31 [2022-01-18 04:12:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:56,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:12:56,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123318945] [2022-01-18 04:12:56,117 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:12:56,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091805941] [2022-01-18 04:12:56,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091805941] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:12:56,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:12:56,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:12:56,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718997935] [2022-01-18 04:12:56,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:12:56,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:12:56,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:12:56,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:12:56,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:12:56,118 INFO L87 Difference]: Start difference. First operand 78 states and 185 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:56,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:12:56,756 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2022-01-18 04:12:56,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:12:56,757 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:12:56,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:12:56,758 INFO L225 Difference]: With dead ends: 111 [2022-01-18 04:12:56,758 INFO L226 Difference]: Without dead ends: 108 [2022-01-18 04:12:56,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:12:56,758 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:12:56,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 190 Invalid, 0 Unknown, 108 Unchecked, 0.6s Time] [2022-01-18 04:12:56,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-18 04:12:56,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 76. [2022-01-18 04:12:56,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.4) internal successors, (180), 75 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:56,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 180 transitions. [2022-01-18 04:12:56,760 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 180 transitions. Word has length 14 [2022-01-18 04:12:56,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:12:56,760 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 180 transitions. [2022-01-18 04:12:56,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:56,760 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 180 transitions. [2022-01-18 04:12:56,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:12:56,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:12:56,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:12:56,776 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 04:12:56,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:12:56,976 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:12:56,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:12:56,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2028457682, now seen corresponding path program 29 times [2022-01-18 04:12:56,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:12:56,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149917789] [2022-01-18 04:12:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:12:56,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:12:56,981 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:12:56,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089634492] [2022-01-18 04:12:56,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:12:56,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:12:56,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:12:56,983 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 04:12:56,983 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 04:12:57,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:12:57,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:12:57,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:12:57,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:12:57,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:12:57,214 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:12:57,215 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 23 treesize of output 20 [2022-01-18 04:12:57,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 04:12:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:57,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:12:58,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 42 [2022-01-18 04:13:00,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:13:00,232 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 22 treesize of output 27 [2022-01-18 04:13:00,247 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 34 treesize of output 28 [2022-01-18 04:13:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:13:01,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:13:01,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149917789] [2022-01-18 04:13:01,554 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:13:01,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089634492] [2022-01-18 04:13:01,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089634492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:13:01,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:13:01,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:13:01,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29174830] [2022-01-18 04:13:01,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:13:01,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:13:01,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:13:01,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:13:01,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:13:01,555 INFO L87 Difference]: Start difference. First operand 76 states and 180 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:13:02,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:13:02,369 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2022-01-18 04:13:02,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:13:02,370 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:13:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:13:02,371 INFO L225 Difference]: With dead ends: 118 [2022-01-18 04:13:02,371 INFO L226 Difference]: Without dead ends: 115 [2022-01-18 04:13:02,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:13:02,372 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 04:13:02,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 31 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 229 Invalid, 0 Unknown, 104 Unchecked, 0.7s Time] [2022-01-18 04:13:02,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-18 04:13:02,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2022-01-18 04:13:02,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.432098765432099) internal successors, (197), 81 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:13:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 197 transitions. [2022-01-18 04:13:02,373 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 197 transitions. Word has length 14 [2022-01-18 04:13:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:13:02,374 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 197 transitions. [2022-01-18 04:13:02,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:13:02,374 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 197 transitions. [2022-01-18 04:13:02,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:13:02,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:13:02,374 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:13:02,399 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 04:13:02,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:13:02,587 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:13:02,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:13:02,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1059355278, now seen corresponding path program 30 times [2022-01-18 04:13:02,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:13:02,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754789477] [2022-01-18 04:13:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:13:02,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:13:02,591 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:13:02,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793245527] [2022-01-18 04:13:02,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:13:02,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:13:02,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:13:02,592 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 04:13:02,593 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 04:13:02,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:13:02,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:13:02,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:13:02,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:13:02,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:13:02,801 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:13:02,801 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 23 treesize of output 20 [2022-01-18 04:13:02,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 04:13:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:13:03,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:13:04,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 42 [2022-01-18 04:13:05,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:13:05,877 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 22 treesize of output 27 [2022-01-18 04:13:05,903 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 34 treesize of output 28 [2022-01-18 04:13:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:13:07,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:13:07,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754789477] [2022-01-18 04:13:07,088 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:13:07,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793245527] [2022-01-18 04:13:07,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793245527] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:13:07,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:13:07,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:13:07,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398175235] [2022-01-18 04:13:07,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:13:07,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:13:07,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:13:07,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:13:07,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:13:07,089 INFO L87 Difference]: Start difference. First operand 82 states and 197 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:13:07,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:13:07,823 INFO L93 Difference]: Finished difference Result 128 states and 304 transitions. [2022-01-18 04:13:07,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:13:07,824 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:13:07,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:13:07,824 INFO L225 Difference]: With dead ends: 128 [2022-01-18 04:13:07,824 INFO L226 Difference]: Without dead ends: 125 [2022-01-18 04:13:07,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:13:07,825 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:13:07,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 29 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 152 Unchecked, 0.4s Time] [2022-01-18 04:13:07,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-18 04:13:07,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 84. [2022-01-18 04:13:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.4457831325301207) internal successors, (203), 83 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:13:07,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 203 transitions. [2022-01-18 04:13:07,827 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 203 transitions. Word has length 14 [2022-01-18 04:13:07,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:13:07,827 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 203 transitions. [2022-01-18 04:13:07,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:13:07,827 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 203 transitions. [2022-01-18 04:13:07,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:13:07,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:13:07,827 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:13:07,843 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 04:13:08,043 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,SelfDestructingSolverStorable32 [2022-01-18 04:13:08,043 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:13:08,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:13:08,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1222573564, now seen corresponding path program 31 times [2022-01-18 04:13:08,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:13:08,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504679756] [2022-01-18 04:13:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:13:08,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:13:08,047 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:13:08,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859883447] [2022-01-18 04:13:08,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:13:08,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:13:08,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:13:08,048 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 04:13:08,049 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 04:13:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:13:08,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:13:08,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:13:08,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:13:08,283 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:13:08,284 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 23 treesize of output 20 [2022-01-18 04:13:08,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 04:13:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:13:08,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:13:09,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 42 [2022-01-18 04:13:11,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:13:11,919 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 22 treesize of output 27 [2022-01-18 04:13:11,938 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 34 treesize of output 28 [2022-01-18 04:13:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:13:13,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:13:13,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504679756] [2022-01-18 04:13:13,259 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:13:13,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859883447] [2022-01-18 04:13:13,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859883447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:13:13,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:13:13,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:13:13,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135764145] [2022-01-18 04:13:13,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:13:13,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:13:13,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:13:13,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:13:13,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:13:13,260 INFO L87 Difference]: Start difference. First operand 84 states and 203 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:13:14,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:13:14,007 INFO L93 Difference]: Finished difference Result 127 states and 302 transitions. [2022-01-18 04:13:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:13:14,008 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:13:14,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:13:14,009 INFO L225 Difference]: With dead ends: 127 [2022-01-18 04:13:14,009 INFO L226 Difference]: Without dead ends: 124 [2022-01-18 04:13:14,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:13:14,009 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:13:14,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 32 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 200 Invalid, 0 Unknown, 184 Unchecked, 0.6s Time] [2022-01-18 04:13:14,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-18 04:13:14,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 78. [2022-01-18 04:13:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.4155844155844157) internal successors, (186), 77 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:13:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 186 transitions. [2022-01-18 04:13:14,011 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 186 transitions. Word has length 14 [2022-01-18 04:13:14,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:13:14,011 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 186 transitions. [2022-01-18 04:13:14,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:13:14,011 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 186 transitions. [2022-01-18 04:13:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:13:14,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:13:14,011 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:13:14,027 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 04:13:14,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:13:14,227 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:13:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:13:14,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1614544686, now seen corresponding path program 32 times [2022-01-18 04:13:14,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:13:14,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040031370] [2022-01-18 04:13:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:13:14,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:13:14,230 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:13:14,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976625576] [2022-01-18 04:13:14,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:13:14,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:13:14,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:13:14,231 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 04:13:14,232 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 04:13:14,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:13:14,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:13:14,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:13:14,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:13:14,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:13:14,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:13:14,520 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 17 treesize of output 13 [2022-01-18 04:13:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:13:14,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:13:15,602 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 40 treesize of output 34 [2022-01-18 04:13:17,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:13:17,125 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 31 treesize of output 36 [2022-01-18 04:13:17,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:13:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:13:19,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:13:19,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040031370] [2022-01-18 04:13:19,594 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:13:19,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976625576] [2022-01-18 04:13:19,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976625576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:13:19,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:13:19,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-01-18 04:13:19,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54871703] [2022-01-18 04:13:19,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:13:19,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:13:19,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:13:19,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:13:19,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:13:19,595 INFO L87 Difference]: Start difference. First operand 78 states and 186 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:13:20,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:13:20,099 INFO L93 Difference]: Finished difference Result 109 states and 253 transitions. [2022-01-18 04:13:20,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:13:20,100 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:13:20,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:13:20,101 INFO L225 Difference]: With dead ends: 109 [2022-01-18 04:13:20,101 INFO L226 Difference]: Without dead ends: 107 [2022-01-18 04:13:20,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:13:20,101 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:13:20,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 137 Invalid, 0 Unknown, 163 Unchecked, 0.5s Time] [2022-01-18 04:13:20,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-18 04:13:20,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 71. [2022-01-18 04:13:20,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.4) internal successors, (168), 70 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:13:20,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 168 transitions. [2022-01-18 04:13:20,103 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 168 transitions. Word has length 14 [2022-01-18 04:13:20,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:13:20,103 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 168 transitions. [2022-01-18 04:13:20,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:13:20,103 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 168 transitions. [2022-01-18 04:13:20,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:13:20,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:13:20,103 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:13:20,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 04:13:20,315 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,SelfDestructingSolverStorable34 [2022-01-18 04:13:20,315 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:13:20,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:13:20,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1040637260, now seen corresponding path program 33 times [2022-01-18 04:13:20,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:13:20,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722568877] [2022-01-18 04:13:20,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:13:20,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:13:20,320 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:13:20,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855370366] [2022-01-18 04:13:20,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:13:20,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:13:20,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:13:20,321 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 04:13:20,322 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 04:13:20,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:13:20,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:13:20,351 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 04:13:20,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:13:20,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:13:20,660 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:13:20,661 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 23 treesize of output 20 [2022-01-18 04:13:20,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 04:13:20,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-18 04:13:21,023 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 04:13:21,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:13:32,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 108 treesize of output 104 [2022-01-18 04:13:51,389 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:13:51,389 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 20 treesize of output 20 [2022-01-18 04:13:51,426 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 34 treesize of output 28 [2022-01-18 04:13:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:13:58,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:13:58,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722568877] [2022-01-18 04:13:58,183 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:13:58,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855370366] [2022-01-18 04:13:58,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855370366] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:13:58,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:13:58,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-01-18 04:13:58,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679067611] [2022-01-18 04:13:58,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:13:58,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:13:58,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:13:58,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:13:58,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=294, Unknown=13, NotChecked=0, Total=380 [2022-01-18 04:13:58,184 INFO L87 Difference]: Start difference. First operand 71 states and 168 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:13:59,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:13:59,943 INFO L93 Difference]: Finished difference Result 141 states and 306 transitions. [2022-01-18 04:13:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:13:59,945 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:13:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:13:59,945 INFO L225 Difference]: With dead ends: 141 [2022-01-18 04:13:59,945 INFO L226 Difference]: Without dead ends: 134 [2022-01-18 04:13:59,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=189, Invalid=610, Unknown=13, NotChecked=0, Total=812 [2022-01-18 04:13:59,946 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 63 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:13:59,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 37 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 161 Invalid, 0 Unknown, 253 Unchecked, 0.6s Time] [2022-01-18 04:13:59,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-18 04:13:59,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2022-01-18 04:13:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.3068181818181817) internal successors, (203), 88 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:13:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 203 transitions. [2022-01-18 04:13:59,948 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 203 transitions. Word has length 15 [2022-01-18 04:13:59,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:13:59,948 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 203 transitions. [2022-01-18 04:13:59,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:13:59,948 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 203 transitions. [2022-01-18 04:13:59,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:13:59,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:13:59,948 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:13:59,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-18 04:14:00,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:14:00,149 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:14:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:14:00,149 INFO L85 PathProgramCache]: Analyzing trace with hash -2064358196, now seen corresponding path program 34 times [2022-01-18 04:14:00,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:14:00,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331277898] [2022-01-18 04:14:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:14:00,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:14:00,158 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:14:00,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226343515] [2022-01-18 04:14:00,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:14:00,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:14:00,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:14:00,159 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 04:14:00,159 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 04:14:00,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:14:00,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:14:00,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 04:14:00,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:14:00,660 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 04:14:00,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:14:01,961 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 04:14:01,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:14:01,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331277898] [2022-01-18 04:14:01,962 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:14:01,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226343515] [2022-01-18 04:14:01,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226343515] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:14:01,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:14:01,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-01-18 04:14:01,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448263817] [2022-01-18 04:14:01,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:14:01,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:14:01,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:14:01,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:14:01,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:14:01,963 INFO L87 Difference]: Start difference. First operand 89 states and 203 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:14:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:14:07,639 INFO L93 Difference]: Finished difference Result 228 states and 504 transitions. [2022-01-18 04:14:07,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 04:14:07,641 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:14:07,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:14:07,642 INFO L225 Difference]: With dead ends: 228 [2022-01-18 04:14:07,642 INFO L226 Difference]: Without dead ends: 219 [2022-01-18 04:14:07,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=308, Invalid=1251, Unknown=1, NotChecked=0, Total=1560 [2022-01-18 04:14:07,642 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 87 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 04:14:07,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 44 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 269 Invalid, 0 Unknown, 351 Unchecked, 0.8s Time] [2022-01-18 04:14:07,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-18 04:14:07,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 109. [2022-01-18 04:14:07,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.5) internal successors, (270), 108 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:14:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 270 transitions. [2022-01-18 04:14:07,645 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 270 transitions. Word has length 15 [2022-01-18 04:14:07,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:14:07,645 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 270 transitions. [2022-01-18 04:14:07,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:14:07,645 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 270 transitions. [2022-01-18 04:14:07,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:14:07,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:14:07,646 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:14:07,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 04:14:07,862 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,SelfDestructingSolverStorable36 [2022-01-18 04:14:07,862 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:14:07,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:14:07,862 INFO L85 PathProgramCache]: Analyzing trace with hash 2112524620, now seen corresponding path program 35 times [2022-01-18 04:14:07,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:14:07,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187192069] [2022-01-18 04:14:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:14:07,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:14:07,872 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:14:07,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1513890423] [2022-01-18 04:14:07,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:14:07,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:14:07,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:14:07,880 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 04:14:07,881 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 04:14:07,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:14:07,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:14:07,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 04:14:07,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:14:08,315 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 04:14:08,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:14:09,295 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 04:14:09,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:14:09,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187192069] [2022-01-18 04:14:09,295 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:14:09,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513890423] [2022-01-18 04:14:09,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513890423] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:14:09,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:14:09,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-01-18 04:14:09,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083583175] [2022-01-18 04:14:09,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:14:09,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:14:09,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:14:09,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:14:09,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:14:09,296 INFO L87 Difference]: Start difference. First operand 109 states and 270 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:14:10,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:14:10,295 INFO L93 Difference]: Finished difference Result 162 states and 379 transitions. [2022-01-18 04:14:10,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:14:10,296 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:14:10,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:14:10,297 INFO L225 Difference]: With dead ends: 162 [2022-01-18 04:14:10,297 INFO L226 Difference]: Without dead ends: 157 [2022-01-18 04:14:10,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:14:10,298 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 53 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 04:14:10,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 33 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 223 Invalid, 0 Unknown, 160 Unchecked, 0.9s Time] [2022-01-18 04:14:10,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-18 04:14:10,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 117. [2022-01-18 04:14:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.5344827586206895) internal successors, (294), 116 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:14:10,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2022-01-18 04:14:10,300 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 15 [2022-01-18 04:14:10,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:14:10,300 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2022-01-18 04:14:10,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:14:10,300 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2022-01-18 04:14:10,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:14:10,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:14:10,300 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:14:10,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 04:14:10,515 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,SelfDestructingSolverStorable37 [2022-01-18 04:14:10,516 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:14:10,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:14:10,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1279940722, now seen corresponding path program 36 times [2022-01-18 04:14:10,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:14:10,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053291133] [2022-01-18 04:14:10,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:14:10,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:14:10,521 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:14:10,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760726720] [2022-01-18 04:14:10,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:14:10,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:14:10,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:14:10,522 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 04:14:10,523 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 04:14:10,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:14:10,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:14:10,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 04:14:10,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:14:10,929 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 04:14:10,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:14:31,522 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 04:14:31,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:14:31,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053291133] [2022-01-18 04:14:31,523 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:14:31,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760726720] [2022-01-18 04:14:31,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760726720] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:14:31,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:14:31,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-18 04:14:31,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070501215] [2022-01-18 04:14:31,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:14:31,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:14:31,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:14:31,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:14:31,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=129, Unknown=7, NotChecked=0, Total=182 [2022-01-18 04:14:31,524 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:14:44,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:14:44,868 INFO L93 Difference]: Finished difference Result 189 states and 450 transitions. [2022-01-18 04:14:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:14:44,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:14:44,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:14:44,870 INFO L225 Difference]: With dead ends: 189 [2022-01-18 04:14:44,870 INFO L226 Difference]: Without dead ends: 186 [2022-01-18 04:14:44,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=82, Invalid=212, Unknown=12, NotChecked=0, Total=306 [2022-01-18 04:14:44,871 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 04:14:44,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 50 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 130 Unchecked, 0.7s Time] [2022-01-18 04:14:44,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-18 04:14:44,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 130. [2022-01-18 04:14:44,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.5891472868217056) internal successors, (334), 129 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:14:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 334 transitions. [2022-01-18 04:14:44,874 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 334 transitions. Word has length 15 [2022-01-18 04:14:44,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:14:44,874 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 334 transitions. [2022-01-18 04:14:44,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:14:44,874 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 334 transitions. [2022-01-18 04:14:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:14:44,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:14:44,874 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:14:44,901 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 04:14:45,085 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,SelfDestructingSolverStorable38 [2022-01-18 04:14:45,086 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:14:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:14:45,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1851395528, now seen corresponding path program 37 times [2022-01-18 04:14:45,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:14:45,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689347294] [2022-01-18 04:14:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:14:45,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:14:45,089 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:14:45,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235458701] [2022-01-18 04:14:45,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:14:45,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:14:45,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:14:45,090 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 04:14:45,091 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 04:14:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:14:45,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 04:14:45,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:14:45,663 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 04:14:45,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:14:47,112 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 04:14:47,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:14:47,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689347294] [2022-01-18 04:14:47,112 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:14:47,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235458701] [2022-01-18 04:14:47,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235458701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:14:47,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:14:47,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-01-18 04:14:47,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300594061] [2022-01-18 04:14:47,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:14:47,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:14:47,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:14:47,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:14:47,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:14:47,113 INFO L87 Difference]: Start difference. First operand 130 states and 334 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:14:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:14:49,054 INFO L93 Difference]: Finished difference Result 258 states and 621 transitions. [2022-01-18 04:14:49,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 04:14:49,056 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:14:49,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:14:49,056 INFO L225 Difference]: With dead ends: 258 [2022-01-18 04:14:49,057 INFO L226 Difference]: Without dead ends: 228 [2022-01-18 04:14:49,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:14:49,057 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 41 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:14:49,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 26 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 159 Invalid, 0 Unknown, 284 Unchecked, 0.6s Time] [2022-01-18 04:14:49,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-18 04:14:49,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 173. [2022-01-18 04:14:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.622093023255814) internal successors, (451), 172 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:14:49,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 451 transitions. [2022-01-18 04:14:49,060 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 451 transitions. Word has length 15 [2022-01-18 04:14:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:14:49,060 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 451 transitions. [2022-01-18 04:14:49,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:14:49,061 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 451 transitions. [2022-01-18 04:14:49,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:14:49,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:14:49,061 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:14:49,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 04:14:49,275 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,SelfDestructingSolverStorable39 [2022-01-18 04:14:49,275 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:14:49,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:14:49,276 INFO L85 PathProgramCache]: Analyzing trace with hash 759669840, now seen corresponding path program 38 times [2022-01-18 04:14:49,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:14:49,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023820565] [2022-01-18 04:14:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:14:49,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:14:49,279 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:14:49,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859043748] [2022-01-18 04:14:49,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:14:49,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:14:49,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:14:49,280 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 04:14:49,281 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 04:14:49,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:14:49,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:14:49,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 04:14:49,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:14:49,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 04:14:49,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:14:49,634 INFO L353 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2022-01-18 04:14:49,635 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 30 treesize of output 25 [2022-01-18 04:14:49,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 04:14:49,936 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 04:14:49,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:14:51,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 42 [2022-01-18 04:14:54,855 INFO L353 Elim1Store]: treesize reduction 20, result has 31.0 percent of original size [2022-01-18 04:14:54,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2022-01-18 04:14:54,944 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 04:14:54,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:14:54,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023820565] [2022-01-18 04:14:54,944 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:14:54,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859043748] [2022-01-18 04:14:54,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859043748] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:14:54,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:14:54,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-18 04:14:54,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790096608] [2022-01-18 04:14:54,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:14:54,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:14:54,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:14:54,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:14:54,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:14:54,945 INFO L87 Difference]: Start difference. First operand 173 states and 451 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:14:56,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:14:56,989 INFO L93 Difference]: Finished difference Result 231 states and 600 transitions. [2022-01-18 04:14:56,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 04:14:56,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:14:56,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:14:56,991 INFO L225 Difference]: With dead ends: 231 [2022-01-18 04:14:56,991 INFO L226 Difference]: Without dead ends: 225 [2022-01-18 04:14:56,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:14:56,992 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:14:56,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 31 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 153 Unchecked, 0.5s Time] [2022-01-18 04:14:56,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-01-18 04:14:56,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 186. [2022-01-18 04:14:56,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.6648648648648647) internal successors, (493), 185 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:14:56,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 493 transitions. [2022-01-18 04:14:56,995 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 493 transitions. Word has length 15 [2022-01-18 04:14:56,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:14:56,995 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 493 transitions. [2022-01-18 04:14:56,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:14:56,995 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 493 transitions. [2022-01-18 04:14:56,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:14:56,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:14:56,996 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:14:57,013 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 04:14:57,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:14:57,211 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:14:57,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:14:57,211 INFO L85 PathProgramCache]: Analyzing trace with hash 765925950, now seen corresponding path program 39 times [2022-01-18 04:14:57,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:14:57,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088789244] [2022-01-18 04:14:57,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:14:57,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:14:57,216 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:14:57,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843748274] [2022-01-18 04:14:57,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:14:57,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:14:57,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:14:57,218 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 04:14:57,219 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 04:14:57,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:14:57,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:14:57,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:14:57,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:14:57,732 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 04:14:57,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:14:59,200 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 04:14:59,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:14:59,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088789244] [2022-01-18 04:14:59,201 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:14:59,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843748274] [2022-01-18 04:14:59,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843748274] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:14:59,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:14:59,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-01-18 04:14:59,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585001714] [2022-01-18 04:14:59,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:14:59,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:14:59,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:14:59,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:14:59,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:14:59,202 INFO L87 Difference]: Start difference. First operand 186 states and 493 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:00,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:15:00,315 INFO L93 Difference]: Finished difference Result 229 states and 590 transitions. [2022-01-18 04:15:00,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:15:00,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:15:00,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:15:00,317 INFO L225 Difference]: With dead ends: 229 [2022-01-18 04:15:00,317 INFO L226 Difference]: Without dead ends: 225 [2022-01-18 04:15:00,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:15:00,318 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 45 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 04:15:00,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 33 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 241 Invalid, 0 Unknown, 149 Unchecked, 0.9s Time] [2022-01-18 04:15:00,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-01-18 04:15:00,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 176. [2022-01-18 04:15:00,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.64) internal successors, (462), 175 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:00,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 462 transitions. [2022-01-18 04:15:00,321 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 462 transitions. Word has length 15 [2022-01-18 04:15:00,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:15:00,321 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 462 transitions. [2022-01-18 04:15:00,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:00,321 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 462 transitions. [2022-01-18 04:15:00,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:15:00,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:15:00,322 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:15:00,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 04:15:00,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:15:00,538 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:15:00,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:15:00,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1313539950, now seen corresponding path program 40 times [2022-01-18 04:15:00,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:15:00,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421080395] [2022-01-18 04:15:00,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:15:00,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:15:00,542 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:15:00,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146290650] [2022-01-18 04:15:00,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:15:00,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:15:00,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:15:00,544 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 04:15:00,544 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 04:15:00,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:15:00,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:15:00,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 04:15:00,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:15:01,108 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 04:15:01,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:15:02,723 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 04:15:02,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:15:02,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421080395] [2022-01-18 04:15:02,723 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:15:02,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146290650] [2022-01-18 04:15:02,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146290650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:15:02,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:15:02,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-01-18 04:15:02,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343072602] [2022-01-18 04:15:02,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:15:02,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:15:02,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:15:02,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:15:02,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:15:02,724 INFO L87 Difference]: Start difference. First operand 176 states and 462 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:15:06,025 INFO L93 Difference]: Finished difference Result 244 states and 624 transitions. [2022-01-18 04:15:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:15:06,026 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:15:06,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:15:06,027 INFO L225 Difference]: With dead ends: 244 [2022-01-18 04:15:06,027 INFO L226 Difference]: Without dead ends: 223 [2022-01-18 04:15:06,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:15:06,028 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:15:06,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 26 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 110 Invalid, 0 Unknown, 187 Unchecked, 0.4s Time] [2022-01-18 04:15:06,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-18 04:15:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 190. [2022-01-18 04:15:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.634920634920635) internal successors, (498), 189 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:06,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 498 transitions. [2022-01-18 04:15:06,031 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 498 transitions. Word has length 15 [2022-01-18 04:15:06,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:15:06,031 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 498 transitions. [2022-01-18 04:15:06,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 498 transitions. [2022-01-18 04:15:06,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:15:06,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:15:06,032 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:15:06,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 04:15:06,247 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,SelfDestructingSolverStorable42 [2022-01-18 04:15:06,248 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:15:06,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:15:06,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1978363202, now seen corresponding path program 41 times [2022-01-18 04:15:06,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:15:06,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670464288] [2022-01-18 04:15:06,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:15:06,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:15:06,252 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:15:06,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128605464] [2022-01-18 04:15:06,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:15:06,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:15:06,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:15:06,259 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 04:15:06,260 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 04:15:06,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:15:06,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:15:06,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 04:15:06,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:15:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:15:06,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:15:27,139 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 04:15:27,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:15:27,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670464288] [2022-01-18 04:15:27,139 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:15:27,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128605464] [2022-01-18 04:15:27,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128605464] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:15:27,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:15:27,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-18 04:15:27,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653796906] [2022-01-18 04:15:27,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:15:27,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:15:27,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:15:27,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:15:27,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=126, Unknown=9, NotChecked=0, Total=182 [2022-01-18 04:15:27,140 INFO L87 Difference]: Start difference. First operand 190 states and 498 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:28,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:15:28,099 INFO L93 Difference]: Finished difference Result 260 states and 635 transitions. [2022-01-18 04:15:28,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:15:28,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:15:28,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:15:28,101 INFO L225 Difference]: With dead ends: 260 [2022-01-18 04:15:28,101 INFO L226 Difference]: Without dead ends: 239 [2022-01-18 04:15:28,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=102, Invalid=231, Unknown=9, NotChecked=0, Total=342 [2022-01-18 04:15:28,102 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 04:15:28,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 47 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 76 Unchecked, 0.7s Time] [2022-01-18 04:15:28,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-18 04:15:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 200. [2022-01-18 04:15:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.6231155778894473) internal successors, (522), 199 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:28,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 522 transitions. [2022-01-18 04:15:28,105 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 522 transitions. Word has length 15 [2022-01-18 04:15:28,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:15:28,105 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 522 transitions. [2022-01-18 04:15:28,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 522 transitions. [2022-01-18 04:15:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:15:28,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:15:28,106 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:15:28,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 04:15:28,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:15:28,307 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:15:28,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:15:28,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1943577740, now seen corresponding path program 42 times [2022-01-18 04:15:28,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:15:28,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016474445] [2022-01-18 04:15:28,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:15:28,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:15:28,312 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:15:28,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967284945] [2022-01-18 04:15:28,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:15:28,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:15:28,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:15:28,313 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 04:15:28,314 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 04:15:28,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:15:28,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:15:28,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 04:15:28,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:15:28,819 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 04:15:28,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:15:30,072 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 04:15:30,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:15:30,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016474445] [2022-01-18 04:15:30,072 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:15:30,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967284945] [2022-01-18 04:15:30,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967284945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:15:30,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:15:30,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-01-18 04:15:30,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137805952] [2022-01-18 04:15:30,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:15:30,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:15:30,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:15:30,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:15:30,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:15:30,073 INFO L87 Difference]: Start difference. First operand 200 states and 522 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:30,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:15:30,905 INFO L93 Difference]: Finished difference Result 241 states and 608 transitions. [2022-01-18 04:15:30,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:15:30,906 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:15:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:15:30,907 INFO L225 Difference]: With dead ends: 241 [2022-01-18 04:15:30,907 INFO L226 Difference]: Without dead ends: 237 [2022-01-18 04:15:30,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:15:30,908 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:15:30,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 23 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 111 Invalid, 0 Unknown, 62 Unchecked, 0.5s Time] [2022-01-18 04:15:30,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-18 04:15:30,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 199. [2022-01-18 04:15:30,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.621212121212121) internal successors, (519), 198 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:30,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 519 transitions. [2022-01-18 04:15:30,911 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 519 transitions. Word has length 15 [2022-01-18 04:15:30,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:15:30,912 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 519 transitions. [2022-01-18 04:15:30,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:30,912 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 519 transitions. [2022-01-18 04:15:30,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:15:30,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:15:30,912 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:15:30,933 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 04:15:31,131 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,SelfDestructingSolverStorable44 [2022-01-18 04:15:31,131 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:15:31,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:15:31,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1832755220, now seen corresponding path program 43 times [2022-01-18 04:15:31,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:15:31,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561717768] [2022-01-18 04:15:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:15:31,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:15:31,135 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:15:31,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844082458] [2022-01-18 04:15:31,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:15:31,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:15:31,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:15:31,137 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 04:15:31,138 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 04:15:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:15:31,172 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 04:15:31,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:15:31,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 04:15:31,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:15:31,518 INFO L353 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2022-01-18 04:15:31,518 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 30 treesize of output 25 [2022-01-18 04:15:31,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 04:15:31,837 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 04:15:31,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:15:33,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 42 [2022-01-18 04:15:36,721 INFO L353 Elim1Store]: treesize reduction 20, result has 31.0 percent of original size [2022-01-18 04:15:36,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2022-01-18 04:15:36,823 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 04:15:36,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:15:36,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561717768] [2022-01-18 04:15:36,823 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:15:36,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844082458] [2022-01-18 04:15:36,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844082458] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:15:36,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:15:36,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-18 04:15:36,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021399371] [2022-01-18 04:15:36,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:15:36,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:15:36,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:15:36,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:15:36,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:15:36,827 INFO L87 Difference]: Start difference. First operand 199 states and 519 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:37,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:15:37,980 INFO L93 Difference]: Finished difference Result 267 states and 672 transitions. [2022-01-18 04:15:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 04:15:37,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:15:37,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:15:37,982 INFO L225 Difference]: With dead ends: 267 [2022-01-18 04:15:37,982 INFO L226 Difference]: Without dead ends: 261 [2022-01-18 04:15:37,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:15:37,983 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:15:37,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 41 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 112 Unchecked, 0.5s Time] [2022-01-18 04:15:37,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-18 04:15:37,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 209. [2022-01-18 04:15:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.6586538461538463) internal successors, (553), 208 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 553 transitions. [2022-01-18 04:15:37,986 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 553 transitions. Word has length 15 [2022-01-18 04:15:37,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:15:37,987 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 553 transitions. [2022-01-18 04:15:37,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:37,987 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 553 transitions. [2022-01-18 04:15:37,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:15:37,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:15:37,987 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:15:38,003 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 04:15:38,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:15:38,195 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:15:38,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:15:38,196 INFO L85 PathProgramCache]: Analyzing trace with hash 974475336, now seen corresponding path program 44 times [2022-01-18 04:15:38,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:15:38,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531098171] [2022-01-18 04:15:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:15:38,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:15:38,199 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:15:38,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301933998] [2022-01-18 04:15:38,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:15:38,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:15:38,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:15:38,201 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 04:15:38,205 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 04:15:38,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:15:38,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:15:38,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 04:15:38,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:15:38,713 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 04:15:38,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:15:40,139 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 04:15:40,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:15:40,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531098171] [2022-01-18 04:15:40,140 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:15:40,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301933998] [2022-01-18 04:15:40,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301933998] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:15:40,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:15:40,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-01-18 04:15:40,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935388153] [2022-01-18 04:15:40,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:15:40,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:15:40,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:15:40,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:15:40,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:15:40,141 INFO L87 Difference]: Start difference. First operand 209 states and 553 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:15:41,378 INFO L93 Difference]: Finished difference Result 266 states and 673 transitions. [2022-01-18 04:15:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:15:41,380 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:15:41,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:15:41,381 INFO L225 Difference]: With dead ends: 266 [2022-01-18 04:15:41,381 INFO L226 Difference]: Without dead ends: 262 [2022-01-18 04:15:41,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:15:41,381 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 41 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 04:15:41,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 29 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 250 Invalid, 0 Unknown, 111 Unchecked, 0.9s Time] [2022-01-18 04:15:41,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-18 04:15:41,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 194. [2022-01-18 04:15:41,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.616580310880829) internal successors, (505), 193 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:41,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 505 transitions. [2022-01-18 04:15:41,385 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 505 transitions. Word has length 15 [2022-01-18 04:15:41,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:15:41,385 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 505 transitions. [2022-01-18 04:15:41,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:41,385 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 505 transitions. [2022-01-18 04:15:41,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:15:41,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:15:41,386 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:15:41,405 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 04:15:41,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:15:41,599 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:15:41,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:15:41,600 INFO L85 PathProgramCache]: Analyzing trace with hash 51628970, now seen corresponding path program 45 times [2022-01-18 04:15:41,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:15:41,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59844832] [2022-01-18 04:15:41,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:15:41,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:15:41,603 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:15:41,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973508667] [2022-01-18 04:15:41,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:15:41,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:15:41,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:15:41,604 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 04:15:41,605 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 04:15:41,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:15:41,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:15:41,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 04:15:41,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:15:41,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 04:15:41,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-18 04:15:42,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:15:42,065 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 17 treesize of output 13 [2022-01-18 04:15:42,296 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 04:15:42,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:15:43,238 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 40 treesize of output 34 [2022-01-18 04:15:49,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:15:49,733 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 36 treesize of output 41 [2022-01-18 04:15:49,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 191 treesize of output 183 [2022-01-18 04:15:54,621 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 04:15:54,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:15:54,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59844832] [2022-01-18 04:15:54,622 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:15:54,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973508667] [2022-01-18 04:15:54,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973508667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:15:54,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:15:54,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-01-18 04:15:54,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587543750] [2022-01-18 04:15:54,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:15:54,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:15:54,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:15:54,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:15:54,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=285, Unknown=2, NotChecked=0, Total=380 [2022-01-18 04:15:54,623 INFO L87 Difference]: Start difference. First operand 194 states and 505 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:55,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:15:55,031 INFO L93 Difference]: Finished difference Result 227 states and 576 transitions. [2022-01-18 04:15:55,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 04:15:55,032 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:15:55,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:15:55,032 INFO L225 Difference]: With dead ends: 227 [2022-01-18 04:15:55,032 INFO L226 Difference]: Without dead ends: 224 [2022-01-18 04:15:55,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=109, Invalid=351, Unknown=2, NotChecked=0, Total=462 [2022-01-18 04:15:55,033 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:15:55,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 14 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-01-18 04:15:55,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-18 04:15:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 196. [2022-01-18 04:15:55,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.6205128205128205) internal successors, (511), 195 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:55,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 511 transitions. [2022-01-18 04:15:55,036 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 511 transitions. Word has length 15 [2022-01-18 04:15:55,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:15:55,036 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 511 transitions. [2022-01-18 04:15:55,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:15:55,036 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 511 transitions. [2022-01-18 04:15:55,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:15:55,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:15:55,037 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:15:55,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 04:15:55,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-18 04:15:55,251 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:15:55,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:15:55,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1769972676, now seen corresponding path program 46 times [2022-01-18 04:15:55,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:15:55,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025909318] [2022-01-18 04:15:55,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:15:55,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:15:55,255 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:15:55,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527690770] [2022-01-18 04:15:55,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:15:55,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:15:55,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:15:55,256 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 04:15:55,256 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 04:15:55,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:15:55,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:15:55,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 04:15:55,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:15:56,012 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 04:15:56,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:15:59,390 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 04:15:59,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:15:59,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025909318] [2022-01-18 04:15:59,390 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:15:59,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527690770] [2022-01-18 04:15:59,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527690770] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:15:59,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:15:59,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-01-18 04:15:59,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131843520] [2022-01-18 04:15:59,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:15:59,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:15:59,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:15:59,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:15:59,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=265, Unknown=1, NotChecked=0, Total=342 [2022-01-18 04:15:59,391 INFO L87 Difference]: Start difference. First operand 196 states and 511 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:02,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:02,520 INFO L93 Difference]: Finished difference Result 330 states and 808 transitions. [2022-01-18 04:16:02,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 04:16:02,522 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:02,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:02,523 INFO L225 Difference]: With dead ends: 330 [2022-01-18 04:16:02,523 INFO L226 Difference]: Without dead ends: 295 [2022-01-18 04:16:02,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=248, Invalid=941, Unknown=1, NotChecked=0, Total=1190 [2022-01-18 04:16:02,523 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 82 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:02,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 48 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 326 Invalid, 0 Unknown, 177 Unchecked, 1.4s Time] [2022-01-18 04:16:02,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-01-18 04:16:02,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 204. [2022-01-18 04:16:02,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.6206896551724137) internal successors, (532), 203 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:02,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 532 transitions. [2022-01-18 04:16:02,527 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 532 transitions. Word has length 15 [2022-01-18 04:16:02,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:02,527 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 532 transitions. [2022-01-18 04:16:02,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:02,527 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 532 transitions. [2022-01-18 04:16:02,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:02,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:02,528 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:02,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:02,735 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,SelfDestructingSolverStorable48 [2022-01-18 04:16:02,736 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:02,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:02,736 INFO L85 PathProgramCache]: Analyzing trace with hash 685977386, now seen corresponding path program 47 times [2022-01-18 04:16:02,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:02,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782888940] [2022-01-18 04:16:02,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:02,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:02,741 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:16:02,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573839224] [2022-01-18 04:16:02,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:16:02,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:02,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:02,743 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 04:16:02,744 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 04:16:02,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:16:02,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:02,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 04:16:02,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:03,285 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 04:16:03,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:04,440 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 04:16:04,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:04,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782888940] [2022-01-18 04:16:04,441 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:16:04,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573839224] [2022-01-18 04:16:04,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573839224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:04,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:16:04,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-01-18 04:16:04,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851645183] [2022-01-18 04:16:04,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:04,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:16:04,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:04,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:16:04,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:16:04,442 INFO L87 Difference]: Start difference. First operand 204 states and 532 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:06,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:06,010 INFO L93 Difference]: Finished difference Result 292 states and 695 transitions. [2022-01-18 04:16:06,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:16:06,012 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:06,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:06,013 INFO L225 Difference]: With dead ends: 292 [2022-01-18 04:16:06,013 INFO L226 Difference]: Without dead ends: 286 [2022-01-18 04:16:06,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:16:06,013 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 70 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:06,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 27 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 249 Invalid, 0 Unknown, 55 Unchecked, 1.1s Time] [2022-01-18 04:16:06,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-18 04:16:06,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 211. [2022-01-18 04:16:06,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.623809523809524) internal successors, (551), 210 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:06,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 551 transitions. [2022-01-18 04:16:06,017 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 551 transitions. Word has length 15 [2022-01-18 04:16:06,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:06,017 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 551 transitions. [2022-01-18 04:16:06,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:06,017 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 551 transitions. [2022-01-18 04:16:06,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:06,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:06,018 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:06,034 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 04:16:06,227 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,SelfDestructingSolverStorable49 [2022-01-18 04:16:06,227 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:06,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:06,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1879942576, now seen corresponding path program 48 times [2022-01-18 04:16:06,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:06,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323084401] [2022-01-18 04:16:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:06,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:06,230 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:16:06,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180860411] [2022-01-18 04:16:06,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:16:06,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:06,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:06,231 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 04:16:06,232 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 04:16:06,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:16:06,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:06,267 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 04:16:06,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:06,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:16:06,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 04:16:06,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:16:06,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 04:16:06,925 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 04:16:06,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:08,477 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 226 treesize of output 214 [2022-01-18 04:16:16,515 INFO L353 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2022-01-18 04:16:16,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 75 [2022-01-18 04:16:16,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 75 treesize of output 67 [2022-01-18 04:16:22,079 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 04:16:22,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:22,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323084401] [2022-01-18 04:16:22,080 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:16:22,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180860411] [2022-01-18 04:16:22,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180860411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:22,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:16:22,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-18 04:16:22,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190483917] [2022-01-18 04:16:22,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:22,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:16:22,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:22,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:16:22,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:16:22,081 INFO L87 Difference]: Start difference. First operand 211 states and 551 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:22,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:22,468 INFO L93 Difference]: Finished difference Result 235 states and 595 transitions. [2022-01-18 04:16:22,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:16:22,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:22,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:22,470 INFO L225 Difference]: With dead ends: 235 [2022-01-18 04:16:22,471 INFO L226 Difference]: Without dead ends: 230 [2022-01-18 04:16:22,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:16:22,471 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:22,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 154 Unchecked, 0.3s Time] [2022-01-18 04:16:22,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-18 04:16:22,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 213. [2022-01-18 04:16:22,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.6226415094339623) internal successors, (556), 212 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:22,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 556 transitions. [2022-01-18 04:16:22,474 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 556 transitions. Word has length 15 [2022-01-18 04:16:22,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:22,474 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 556 transitions. [2022-01-18 04:16:22,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:22,475 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 556 transitions. [2022-01-18 04:16:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:22,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:22,475 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:22,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:22,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:22,683 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:22,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:22,683 INFO L85 PathProgramCache]: Analyzing trace with hash -161598870, now seen corresponding path program 49 times [2022-01-18 04:16:22,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:22,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873832014] [2022-01-18 04:16:22,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:22,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:22,686 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:16:22,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331865166] [2022-01-18 04:16:22,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:16:22,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:22,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:22,687 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 04:16:22,687 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 04:16:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:22,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:16:22,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:22,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:16:23,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:16:23,050 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 17 treesize of output 13 [2022-01-18 04:16:23,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:16:23,346 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 04:16:23,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:24,764 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 210 treesize of output 198 [2022-01-18 04:16:27,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:16:27,041 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 31 treesize of output 36 [2022-01-18 04:16:27,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:16:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:30,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:30,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873832014] [2022-01-18 04:16:30,384 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:16:30,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331865166] [2022-01-18 04:16:30,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331865166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:30,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:16:30,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-01-18 04:16:30,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132359915] [2022-01-18 04:16:30,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:30,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:16:30,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:30,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:16:30,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:16:30,385 INFO L87 Difference]: Start difference. First operand 213 states and 556 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:31,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:31,075 INFO L93 Difference]: Finished difference Result 234 states and 610 transitions. [2022-01-18 04:16:31,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 04:16:31,077 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:31,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:31,078 INFO L225 Difference]: With dead ends: 234 [2022-01-18 04:16:31,078 INFO L226 Difference]: Without dead ends: 231 [2022-01-18 04:16:31,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:16:31,079 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:31,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 196 Unchecked, 0.6s Time] [2022-01-18 04:16:31,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-18 04:16:31,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 215. [2022-01-18 04:16:31,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.635514018691589) internal successors, (564), 214 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:31,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 564 transitions. [2022-01-18 04:16:31,082 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 564 transitions. Word has length 15 [2022-01-18 04:16:31,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:31,082 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 564 transitions. [2022-01-18 04:16:31,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:31,083 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 564 transitions. [2022-01-18 04:16:31,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:31,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:31,083 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:31,099 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 04:16:31,296 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,SelfDestructingSolverStorable51 [2022-01-18 04:16:31,296 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:31,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:31,296 INFO L85 PathProgramCache]: Analyzing trace with hash -272421390, now seen corresponding path program 50 times [2022-01-18 04:16:31,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:31,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573875774] [2022-01-18 04:16:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:31,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:31,299 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:16:31,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57534938] [2022-01-18 04:16:31,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:16:31,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:31,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:31,300 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 04:16:31,301 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 04:16:31,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:16:31,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:31,336 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 04:16:31,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:31,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:16:31,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 04:16:31,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:16:31,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 04:16:31,960 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 04:16:31,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:33,376 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 226 treesize of output 214 [2022-01-18 04:16:41,822 INFO L353 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2022-01-18 04:16:41,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 75 [2022-01-18 04:16:41,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 75 treesize of output 67 [2022-01-18 04:16:46,532 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 04:16:46,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:46,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573875774] [2022-01-18 04:16:46,532 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:16:46,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57534938] [2022-01-18 04:16:46,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57534938] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:46,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:16:46,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-18 04:16:46,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24576556] [2022-01-18 04:16:46,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:46,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:16:46,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:46,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:16:46,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:16:46,533 INFO L87 Difference]: Start difference. First operand 215 states and 564 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:47,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:47,149 INFO L93 Difference]: Finished difference Result 256 states and 654 transitions. [2022-01-18 04:16:47,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 04:16:47,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:47,152 INFO L225 Difference]: With dead ends: 256 [2022-01-18 04:16:47,152 INFO L226 Difference]: Without dead ends: 251 [2022-01-18 04:16:47,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:16:47,167 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:47,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 17 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 95 Unchecked, 0.4s Time] [2022-01-18 04:16:47,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-18 04:16:47,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 216. [2022-01-18 04:16:47,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.641860465116279) internal successors, (568), 215 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:47,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 568 transitions. [2022-01-18 04:16:47,171 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 568 transitions. Word has length 15 [2022-01-18 04:16:47,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:47,171 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 568 transitions. [2022-01-18 04:16:47,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:47,171 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 568 transitions. [2022-01-18 04:16:47,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:47,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:47,172 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:47,189 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 04:16:47,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:47,381 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:47,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:47,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1190403290, now seen corresponding path program 51 times [2022-01-18 04:16:47,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:47,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286518939] [2022-01-18 04:16:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:47,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:47,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:16:47,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956458251] [2022-01-18 04:16:47,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:16:47,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:47,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:47,385 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 04:16:47,385 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 04:16:47,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:16:47,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:47,424 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 04:16:47,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:47,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:16:47,682 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:16:47,683 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 20 treesize of output 17 [2022-01-18 04:16:47,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-18 04:16:47,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 04:16:47,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-18 04:16:48,212 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 04:16:48,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:17:07,032 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 56 treesize of output 50 [2022-01-18 04:17:09,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:17:09,616 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 34 treesize of output 39 [2022-01-18 04:17:09,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 91 treesize of output 87 [2022-01-18 04:17:21,749 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 04:17:21,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:17:21,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286518939] [2022-01-18 04:17:21,750 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:17:21,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956458251] [2022-01-18 04:17:21,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956458251] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:17:21,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:17:21,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-01-18 04:17:21,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627510015] [2022-01-18 04:17:21,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:17:21,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:17:21,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:17:21,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:17:21,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=271, Unknown=10, NotChecked=0, Total=380 [2022-01-18 04:17:21,751 INFO L87 Difference]: Start difference. First operand 216 states and 568 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:17:24,417 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (< c_x c_L))) (and (or .cse0 (not (= c_L (* c_N c_M))) (forall ((b Int) (a Int)) (or (not (<= 0 b)) (= (select c_A (+ b (* a c_M))) (select (select c_B a) b)) (not (<= 0 a)) (not (< a c_N)) (not (< b c_M))))) (or (< c_i (div c_L c_M)) (forall ((b Int) (a Int)) (or (not (<= 0 b)) (= (select c_A (+ b (* a c_M))) (select (select c_B a) b)) (not (<= 0 a)) (not (< b c_M)) (not (< a (div c_L c_M))))) .cse0 (not (= (mod c_L c_M) 0))))) is different from true [2022-01-18 04:17:25,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:17:25,137 INFO L93 Difference]: Finished difference Result 256 states and 660 transitions. [2022-01-18 04:17:25,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:17:25,139 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:17:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:17:25,140 INFO L225 Difference]: With dead ends: 256 [2022-01-18 04:17:25,140 INFO L226 Difference]: Without dead ends: 253 [2022-01-18 04:17:25,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=147, Invalid=446, Unknown=11, NotChecked=46, Total=650 [2022-01-18 04:17:25,140 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:17:25,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 30 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 150 Invalid, 0 Unknown, 109 Unchecked, 0.6s Time] [2022-01-18 04:17:25,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-18 04:17:25,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 220. [2022-01-18 04:17:25,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.6666666666666665) internal successors, (584), 219 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:17:25,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 584 transitions. [2022-01-18 04:17:25,148 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 584 transitions. Word has length 15 [2022-01-18 04:17:25,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:17:25,148 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 584 transitions. [2022-01-18 04:17:25,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:17:25,148 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 584 transitions. [2022-01-18 04:17:25,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:17:25,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:17:25,151 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:17:25,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 04:17:25,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:17:25,355 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:17:25,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:17:25,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1301225810, now seen corresponding path program 52 times [2022-01-18 04:17:25,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:17:25,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202483969] [2022-01-18 04:17:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:17:25,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:17:25,358 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:17:25,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139204250] [2022-01-18 04:17:25,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:17:25,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:17:25,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:17:25,359 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 04:17:25,360 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 04:17:25,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:17:25,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:17:25,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 04:17:25,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:17:25,997 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 04:17:25,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:17:27,952 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 04:17:27,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:17:27,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202483969] [2022-01-18 04:17:27,952 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:17:27,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139204250] [2022-01-18 04:17:27,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139204250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:17:27,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:17:27,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-01-18 04:17:27,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605649212] [2022-01-18 04:17:27,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:17:27,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:17:27,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:17:27,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:17:27,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:17:27,953 INFO L87 Difference]: Start difference. First operand 220 states and 584 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:17:30,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:17:30,324 INFO L93 Difference]: Finished difference Result 288 states and 738 transitions. [2022-01-18 04:17:30,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:17:30,328 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:17:30,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:17:30,329 INFO L225 Difference]: With dead ends: 288 [2022-01-18 04:17:30,329 INFO L226 Difference]: Without dead ends: 255 [2022-01-18 04:17:30,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:17:30,329 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 04:17:30,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 25 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 209 Invalid, 0 Unknown, 132 Unchecked, 0.8s Time] [2022-01-18 04:17:30,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-18 04:17:30,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 236. [2022-01-18 04:17:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.702127659574468) internal successors, (635), 235 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:17:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 635 transitions. [2022-01-18 04:17:30,333 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 635 transitions. Word has length 15 [2022-01-18 04:17:30,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:17:30,333 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 635 transitions. [2022-01-18 04:17:30,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:17:30,333 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 635 transitions. [2022-01-18 04:17:30,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:17:30,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:17:30,333 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:17:30,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 04:17:30,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:17:30,534 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:17:30,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:17:30,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1308487770, now seen corresponding path program 53 times [2022-01-18 04:17:30,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:17:30,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237792637] [2022-01-18 04:17:30,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:17:30,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:17:30,537 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:17:30,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406100199] [2022-01-18 04:17:30,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:17:30,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:17:30,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:17:30,538 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 04:17:30,539 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 04:17:30,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:17:30,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:17:30,576 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 04:17:30,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:17:30,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:17:30,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 04:17:31,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:17:31,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 04:17:31,263 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 04:17:31,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:17:33,107 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 226 treesize of output 214 [2022-01-18 04:17:38,804 INFO L353 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2022-01-18 04:17:38,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 75 [2022-01-18 04:17:38,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 75 treesize of output 67 [2022-01-18 04:17:43,192 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 04:17:43,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:17:43,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237792637] [2022-01-18 04:17:43,192 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:17:43,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406100199] [2022-01-18 04:17:43,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406100199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:17:43,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:17:43,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-18 04:17:43,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379409440] [2022-01-18 04:17:43,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:17:43,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:17:43,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:17:43,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:17:43,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:17:43,193 INFO L87 Difference]: Start difference. First operand 236 states and 635 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:17:43,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:17:43,881 INFO L93 Difference]: Finished difference Result 257 states and 671 transitions. [2022-01-18 04:17:43,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:17:43,882 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:17:43,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:17:43,883 INFO L225 Difference]: With dead ends: 257 [2022-01-18 04:17:43,883 INFO L226 Difference]: Without dead ends: 252 [2022-01-18 04:17:43,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:17:43,884 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:17:43,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 165 Unchecked, 0.6s Time] [2022-01-18 04:17:43,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-01-18 04:17:43,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 237. [2022-01-18 04:17:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.7033898305084745) internal successors, (638), 236 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:17:43,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 638 transitions. [2022-01-18 04:17:43,887 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 638 transitions. Word has length 15 [2022-01-18 04:17:43,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:17:43,887 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 638 transitions. [2022-01-18 04:17:43,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:17:43,887 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 638 transitions. [2022-01-18 04:17:43,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:17:43,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:17:43,888 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:17:43,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 04:17:44,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:17:44,092 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:17:44,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:17:44,093 INFO L85 PathProgramCache]: Analyzing trace with hash 409855936, now seen corresponding path program 54 times [2022-01-18 04:17:44,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:17:44,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708936209] [2022-01-18 04:17:44,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:17:44,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:17:44,095 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:17:44,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434009889] [2022-01-18 04:17:44,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:17:44,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:17:44,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:17:44,096 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 04:17:44,097 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 04:17:44,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:17:44,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:17:44,133 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 04:17:44,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:17:44,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:17:44,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:17:44,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:17:44,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 04:17:44,788 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 04:17:44,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:17:46,778 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 226 treesize of output 214 [2022-01-18 04:17:52,772 INFO L353 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2022-01-18 04:17:52,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 75 [2022-01-18 04:17:52,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 75 treesize of output 67 [2022-01-18 04:17:58,623 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 04:17:58,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:17:58,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708936209] [2022-01-18 04:17:58,623 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:17:58,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434009889] [2022-01-18 04:17:58,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434009889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:17:58,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:17:58,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-18 04:17:58,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591236696] [2022-01-18 04:17:58,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:17:58,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:17:58,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:17:58,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:17:58,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:17:58,624 INFO L87 Difference]: Start difference. First operand 237 states and 638 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:18:03,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:18:03,124 INFO L93 Difference]: Finished difference Result 286 states and 732 transitions. [2022-01-18 04:18:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 04:18:03,126 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:18:03,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:18:03,127 INFO L225 Difference]: With dead ends: 286 [2022-01-18 04:18:03,127 INFO L226 Difference]: Without dead ends: 280 [2022-01-18 04:18:03,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=85, Invalid=334, Unknown=1, NotChecked=0, Total=420 [2022-01-18 04:18:03,127 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:18:03,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 23 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 288 Unchecked, 0.6s Time] [2022-01-18 04:18:03,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-01-18 04:18:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 237. [2022-01-18 04:18:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.7033898305084745) internal successors, (638), 236 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:18:03,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 638 transitions. [2022-01-18 04:18:03,131 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 638 transitions. Word has length 15 [2022-01-18 04:18:03,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:18:03,131 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 638 transitions. [2022-01-18 04:18:03,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:18:03,131 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 638 transitions. [2022-01-18 04:18:03,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:18:03,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:18:03,132 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:18:03,151 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 04:18:03,347 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,SelfDestructingSolverStorable56 [2022-01-18 04:18:03,347 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:18:03,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:18:03,348 INFO L85 PathProgramCache]: Analyzing trace with hash -2141071668, now seen corresponding path program 55 times [2022-01-18 04:18:03,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:18:03,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824922587] [2022-01-18 04:18:03,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:18:03,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:18:03,350 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:18:03,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859922402] [2022-01-18 04:18:03,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:18:03,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:18:03,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:18:03,351 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:18:03,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 04:18:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:18:03,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 04:18:03,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:18:03,998 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 04:18:03,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:18:06,218 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 04:18:06,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:18:06,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824922587] [2022-01-18 04:18:06,218 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:18:06,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859922402] [2022-01-18 04:18:06,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859922402] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:18:06,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:18:06,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-01-18 04:18:06,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615480293] [2022-01-18 04:18:06,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:18:06,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:18:06,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:18:06,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:18:06,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:18:06,219 INFO L87 Difference]: Start difference. First operand 237 states and 638 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:18:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:18:07,918 INFO L93 Difference]: Finished difference Result 293 states and 762 transitions. [2022-01-18 04:18:07,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 04:18:07,920 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:18:07,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:18:07,921 INFO L225 Difference]: With dead ends: 293 [2022-01-18 04:18:07,921 INFO L226 Difference]: Without dead ends: 287 [2022-01-18 04:18:07,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:18:07,922 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:18:07,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 24 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 128 Invalid, 0 Unknown, 237 Unchecked, 0.5s Time] [2022-01-18 04:18:07,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-01-18 04:18:07,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 260. [2022-01-18 04:18:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.7142857142857144) internal successors, (703), 259 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:18:07,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 703 transitions. [2022-01-18 04:18:07,926 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 703 transitions. Word has length 15 [2022-01-18 04:18:07,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:18:07,926 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 703 transitions. [2022-01-18 04:18:07,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:18:07,927 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 703 transitions. [2022-01-18 04:18:07,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:18:07,927 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:18:07,927 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:18:07,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 04:18:08,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-01-18 04:18:08,144 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:18:08,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:18:08,144 INFO L85 PathProgramCache]: Analyzing trace with hash 428289962, now seen corresponding path program 56 times [2022-01-18 04:18:08,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:18:08,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744831875] [2022-01-18 04:18:08,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:18:08,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:18:08,146 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:18:08,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159334955] [2022-01-18 04:18:08,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:18:08,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:18:08,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:18:08,148 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:18:08,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 04:18:08,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:18:08,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:18:08,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 04:18:08,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:18:08,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:18:08,425 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 04:18:08,426 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 20 treesize of output 17 [2022-01-18 04:18:08,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-18 04:18:08,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:18:08,810 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 04:18:08,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:18:10,994 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 210 treesize of output 198 [2022-01-18 04:18:12,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:18:12,922 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 31 treesize of output 36 [2022-01-18 04:18:12,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:18:16,562 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 04:18:16,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:18:16,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744831875] [2022-01-18 04:18:16,562 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:18:16,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159334955] [2022-01-18 04:18:16,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159334955] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:18:16,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:18:16,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-01-18 04:18:16,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800179372] [2022-01-18 04:18:16,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:18:16,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:18:16,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:18:16,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:18:16,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:18:16,563 INFO L87 Difference]: Start difference. First operand 260 states and 703 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:18:16,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:18:16,788 INFO L93 Difference]: Finished difference Result 270 states and 723 transitions. [2022-01-18 04:18:16,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:18:16,788 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:18:16,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:18:16,789 INFO L225 Difference]: With dead ends: 270 [2022-01-18 04:18:16,789 INFO L226 Difference]: Without dead ends: 267 [2022-01-18 04:18:16,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:18:16,790 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:18:16,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-01-18 04:18:16,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-01-18 04:18:16,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 261. [2022-01-18 04:18:16,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.7192307692307693) internal successors, (707), 260 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:18:16,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 707 transitions. [2022-01-18 04:18:16,793 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 707 transitions. Word has length 15 [2022-01-18 04:18:16,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:18:16,793 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 707 transitions. [2022-01-18 04:18:16,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:18:16,793 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 707 transitions. [2022-01-18 04:18:16,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:18:16,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:18:16,794 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:18:16,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 04:18:16,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 04:18:16,997 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:18:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:18:16,997 INFO L85 PathProgramCache]: Analyzing trace with hash 317467442, now seen corresponding path program 57 times [2022-01-18 04:18:16,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:18:16,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346111125] [2022-01-18 04:18:16,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:18:16,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:18:17,000 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:18:17,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827189273] [2022-01-18 04:18:17,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:18:17,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:18:17,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:18:17,001 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:18:17,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 04:18:17,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:18:17,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:18:17,039 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:18:17,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:18:17,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:18:17,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:18:17,245 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 20 treesize of output 24 [2022-01-18 04:18:17,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-18 04:18:18,306 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 04:18:18,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:18:26,872 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 40 treesize of output 34 [2022-01-18 04:18:33,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:18:33,259 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 31 treesize of output 36 [2022-01-18 04:18:33,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:18:35,307 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 04:18:35,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:18:35,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346111125] [2022-01-18 04:18:35,307 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:18:35,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827189273] [2022-01-18 04:18:35,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827189273] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:18:35,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:18:35,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-18 04:18:35,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504483099] [2022-01-18 04:18:35,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:18:35,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:18:35,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:18:35,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:18:35,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=178, Unknown=4, NotChecked=0, Total=240 [2022-01-18 04:18:35,308 INFO L87 Difference]: Start difference. First operand 261 states and 707 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:18:35,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:18:35,628 INFO L93 Difference]: Finished difference Result 311 states and 823 transitions. [2022-01-18 04:18:35,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:18:35,629 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:18:35,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:18:35,630 INFO L225 Difference]: With dead ends: 311 [2022-01-18 04:18:35,630 INFO L226 Difference]: Without dead ends: 308 [2022-01-18 04:18:35,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=68, Invalid=200, Unknown=4, NotChecked=0, Total=272 [2022-01-18 04:18:35,630 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:18:35,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 33 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 114 Unchecked, 0.2s Time] [2022-01-18 04:18:35,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-18 04:18:35,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 261. [2022-01-18 04:18:35,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.7192307692307693) internal successors, (707), 260 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:18:35,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 707 transitions. [2022-01-18 04:18:35,642 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 707 transitions. Word has length 15 [2022-01-18 04:18:35,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:18:35,642 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 707 transitions. [2022-01-18 04:18:35,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:18:35,643 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 707 transitions. [2022-01-18 04:18:35,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:18:35,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:18:35,643 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:18:35,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 04:18:35,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:18:35,844 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:18:35,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:18:35,844 INFO L85 PathProgramCache]: Analyzing trace with hash 323723552, now seen corresponding path program 58 times [2022-01-18 04:18:35,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:18:35,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654892571] [2022-01-18 04:18:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:18:35,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:18:35,846 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:18:35,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627755598] [2022-01-18 04:18:35,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:18:35,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:18:35,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:18:35,848 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:18:35,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 04:18:35,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:18:35,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:18:35,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:18:35,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:18:36,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:18:36,113 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-01-18 04:18:36,113 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 24 treesize of output 19 [2022-01-18 04:18:36,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 04:18:36,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:18:36,477 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 04:18:36,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:18:38,627 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 210 treesize of output 198 [2022-01-18 04:18:40,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:18:40,705 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 31 treesize of output 36 [2022-01-18 04:18:40,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:18:44,520 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 04:18:44,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:18:44,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654892571] [2022-01-18 04:18:44,520 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:18:44,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627755598] [2022-01-18 04:18:44,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627755598] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:18:44,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:18:44,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-01-18 04:18:44,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527063555] [2022-01-18 04:18:44,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:18:44,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:18:44,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:18:44,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:18:44,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:18:44,521 INFO L87 Difference]: Start difference. First operand 261 states and 707 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:18:44,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:18:44,887 INFO L93 Difference]: Finished difference Result 286 states and 759 transitions. [2022-01-18 04:18:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:18:44,887 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:18:44,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:18:44,888 INFO L225 Difference]: With dead ends: 286 [2022-01-18 04:18:44,888 INFO L226 Difference]: Without dead ends: 283 [2022-01-18 04:18:44,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:18:44,889 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:18:44,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 248 Unchecked, 0.4s Time] [2022-01-18 04:18:44,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-18 04:18:44,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 262. [2022-01-18 04:18:44,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.7241379310344827) internal successors, (711), 261 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:18:44,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 711 transitions. [2022-01-18 04:18:44,893 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 711 transitions. Word has length 15 [2022-01-18 04:18:44,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:18:44,893 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 711 transitions. [2022-01-18 04:18:44,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:18:44,893 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 711 transitions. [2022-01-18 04:18:44,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:18:44,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:18:44,893 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:18:44,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 04:18:45,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:18:45,109 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:18:45,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:18:45,109 INFO L85 PathProgramCache]: Analyzing trace with hash 955767470, now seen corresponding path program 59 times [2022-01-18 04:18:45,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:18:45,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785372948] [2022-01-18 04:18:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:18:45,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:18:45,112 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:18:45,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302338756] [2022-01-18 04:18:45,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:18:45,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:18:45,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:18:45,113 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:18:45,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 04:18:45,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:18:45,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:18:45,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 04:18:45,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:18:45,555 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 04:18:45,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:19:10,274 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 04:19:10,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:19:10,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785372948] [2022-01-18 04:19:10,274 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:19:10,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302338756] [2022-01-18 04:19:10,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302338756] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:19:10,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:19:10,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-18 04:19:10,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292923871] [2022-01-18 04:19:10,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:19:10,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:19:10,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:19:10,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:19:10,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=132, Unknown=9, NotChecked=0, Total=182 [2022-01-18 04:19:10,275 INFO L87 Difference]: Start difference. First operand 262 states and 711 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:19:50,489 WARN L228 SmtUtils]: Spent 33.50s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 04:20:48,003 WARN L228 SmtUtils]: Spent 41.32s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 04:20:56,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:20:56,829 INFO L93 Difference]: Finished difference Result 392 states and 978 transitions. [2022-01-18 04:20:56,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 04:20:56,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:20:56,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:20:56,832 INFO L225 Difference]: With dead ends: 392 [2022-01-18 04:20:56,832 INFO L226 Difference]: Without dead ends: 384 [2022-01-18 04:20:56,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 127.9s TimeCoverageRelationStatistics Valid=103, Invalid=338, Unknown=21, NotChecked=0, Total=462 [2022-01-18 04:20:56,833 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 58 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:20:56,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 29 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 194 Invalid, 0 Unknown, 204 Unchecked, 1.2s Time] [2022-01-18 04:20:56,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-01-18 04:20:56,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 272. [2022-01-18 04:20:56,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.763837638376384) internal successors, (749), 271 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:20:56,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 749 transitions. [2022-01-18 04:20:56,838 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 749 transitions. Word has length 15 [2022-01-18 04:20:56,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:20:56,838 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 749 transitions. [2022-01-18 04:20:56,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:20:56,838 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 749 transitions. [2022-01-18 04:20:56,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:20:56,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:20:56,838 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:20:56,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 04:20:57,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:20:57,055 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:20:57,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:20:57,056 INFO L85 PathProgramCache]: Analyzing trace with hash 837682990, now seen corresponding path program 60 times [2022-01-18 04:20:57,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:20:57,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6918882] [2022-01-18 04:20:57,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:20:57,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:20:57,058 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:20:57,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209357891] [2022-01-18 04:20:57,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:20:57,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:20:57,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:20:57,061 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:20:57,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 04:20:57,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:20:57,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:20:57,103 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 04:20:57,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:20:57,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:20:57,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:20:57,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:20:57,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 04:20:57,921 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 04:20:57,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:21:00,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 56 treesize of output 52 [2022-01-18 04:21:02,522 INFO L353 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2022-01-18 04:21:02,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 51 [2022-01-18 04:21:02,563 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 181 treesize of output 169 [2022-01-18 04:21:07,463 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 04:21:07,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:21:07,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6918882] [2022-01-18 04:21:07,464 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:21:07,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209357891] [2022-01-18 04:21:07,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209357891] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:21:07,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:21:07,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-18 04:21:07,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172967239] [2022-01-18 04:21:07,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:21:07,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:21:07,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:21:07,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:21:07,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:21:07,465 INFO L87 Difference]: Start difference. First operand 272 states and 749 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:08,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:21:08,118 INFO L93 Difference]: Finished difference Result 293 states and 785 transitions. [2022-01-18 04:21:08,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:21:08,120 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:21:08,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:21:08,121 INFO L225 Difference]: With dead ends: 293 [2022-01-18 04:21:08,121 INFO L226 Difference]: Without dead ends: 288 [2022-01-18 04:21:08,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:21:08,121 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:21:08,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 24 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 130 Unchecked, 0.6s Time] [2022-01-18 04:21:08,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-18 04:21:08,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 272. [2022-01-18 04:21:08,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.763837638376384) internal successors, (749), 271 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 749 transitions. [2022-01-18 04:21:08,125 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 749 transitions. Word has length 15 [2022-01-18 04:21:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:21:08,125 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 749 transitions. [2022-01-18 04:21:08,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:08,125 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 749 transitions. [2022-01-18 04:21:08,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:21:08,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:21:08,126 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:21:08,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 04:21:08,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-01-18 04:21:08,329 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:21:08,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:21:08,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1738940600, now seen corresponding path program 61 times [2022-01-18 04:21:08,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:21:08,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159389190] [2022-01-18 04:21:08,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:21:08,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:21:08,351 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:21:08,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053964042] [2022-01-18 04:21:08,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:21:08,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:21:08,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:21:08,352 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:21:08,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 04:21:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:21:08,394 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 04:21:08,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:21:08,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:21:08,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:21:08,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:21:08,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 04:21:09,206 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 04:21:09,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:21:11,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 56 treesize of output 52 [2022-01-18 04:21:13,907 INFO L353 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2022-01-18 04:21:13,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 51 [2022-01-18 04:21:13,947 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 87 treesize of output 81 [2022-01-18 04:21:18,788 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 04:21:18,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:21:18,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159389190] [2022-01-18 04:21:18,788 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:21:18,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053964042] [2022-01-18 04:21:18,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053964042] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:21:18,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:21:18,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-18 04:21:18,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120653074] [2022-01-18 04:21:18,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:21:18,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:21:18,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:21:18,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:21:18,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:21:18,789 INFO L87 Difference]: Start difference. First operand 272 states and 749 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:21:24,131 INFO L93 Difference]: Finished difference Result 321 states and 838 transitions. [2022-01-18 04:21:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 04:21:24,132 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:21:24,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:21:24,133 INFO L225 Difference]: With dead ends: 321 [2022-01-18 04:21:24,133 INFO L226 Difference]: Without dead ends: 316 [2022-01-18 04:21:24,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=110, Invalid=440, Unknown=2, NotChecked=0, Total=552 [2022-01-18 04:21:24,133 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:21:24,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 21 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 215 Unchecked, 0.4s Time] [2022-01-18 04:21:24,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-18 04:21:24,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 272. [2022-01-18 04:21:24,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.763837638376384) internal successors, (749), 271 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:24,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 749 transitions. [2022-01-18 04:21:24,137 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 749 transitions. Word has length 15 [2022-01-18 04:21:24,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:21:24,137 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 749 transitions. [2022-01-18 04:21:24,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:24,137 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 749 transitions. [2022-01-18 04:21:24,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:21:24,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:21:24,138 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:21:24,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 04:21:24,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:21:24,338 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:21:24,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:21:24,338 INFO L85 PathProgramCache]: Analyzing trace with hash 5099092, now seen corresponding path program 62 times [2022-01-18 04:21:24,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:21:24,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599079165] [2022-01-18 04:21:24,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:21:24,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:21:24,341 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:21:24,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174311228] [2022-01-18 04:21:24,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:21:24,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:21:24,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:21:24,342 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:21:24,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 04:21:24,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:21:24,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:21:24,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:21:24,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:21:25,162 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 04:21:25,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:21:27,630 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 04:21:27,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:21:27,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599079165] [2022-01-18 04:21:27,635 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:21:27,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174311228] [2022-01-18 04:21:27,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174311228] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:21:27,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:21:27,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-01-18 04:21:27,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039999861] [2022-01-18 04:21:27,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:21:27,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:21:27,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:21:27,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:21:27,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:21:27,637 INFO L87 Difference]: Start difference. First operand 272 states and 749 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:30,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:21:30,736 INFO L93 Difference]: Finished difference Result 357 states and 932 transitions. [2022-01-18 04:21:30,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:21:30,738 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:21:30,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:21:30,739 INFO L225 Difference]: With dead ends: 357 [2022-01-18 04:21:30,739 INFO L226 Difference]: Without dead ends: 349 [2022-01-18 04:21:30,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:21:30,740 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 04:21:30,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 29 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 168 Invalid, 0 Unknown, 254 Unchecked, 0.8s Time] [2022-01-18 04:21:30,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-18 04:21:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 294. [2022-01-18 04:21:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.7747440273037545) internal successors, (813), 293 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:30,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 813 transitions. [2022-01-18 04:21:30,744 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 813 transitions. Word has length 15 [2022-01-18 04:21:30,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:21:30,744 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 813 transitions. [2022-01-18 04:21:30,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:30,744 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 813 transitions. [2022-01-18 04:21:30,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:21:30,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:21:30,745 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:21:30,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-18 04:21:30,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-18 04:21:30,952 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:21:30,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:21:30,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1720506574, now seen corresponding path program 63 times [2022-01-18 04:21:30,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:21:30,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347877290] [2022-01-18 04:21:30,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:21:30,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:21:30,955 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:21:30,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915243430] [2022-01-18 04:21:30,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:21:30,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:21:30,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:21:30,956 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:21:30,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 04:21:30,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:21:31,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:21:31,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 04:21:31,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:21:31,649 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 04:21:31,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:21:34,043 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 04:21:34,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:21:34,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347877290] [2022-01-18 04:21:34,043 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:21:34,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915243430] [2022-01-18 04:21:34,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915243430] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:21:34,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:21:34,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-01-18 04:21:34,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113610329] [2022-01-18 04:21:34,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:21:34,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:21:34,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:21:34,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:21:34,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:21:34,044 INFO L87 Difference]: Start difference. First operand 294 states and 813 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:36,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:21:36,310 INFO L93 Difference]: Finished difference Result 450 states and 1193 transitions. [2022-01-18 04:21:36,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 04:21:36,312 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:21:36,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:21:36,314 INFO L225 Difference]: With dead ends: 450 [2022-01-18 04:21:36,314 INFO L226 Difference]: Without dead ends: 439 [2022-01-18 04:21:36,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:21:36,315 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 67 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 04:21:36,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 22 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 163 Invalid, 0 Unknown, 207 Unchecked, 0.9s Time] [2022-01-18 04:21:36,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-01-18 04:21:36,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 303. [2022-01-18 04:21:36,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.8046357615894038) internal successors, (847), 302 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:36,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 847 transitions. [2022-01-18 04:21:36,320 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 847 transitions. Word has length 15 [2022-01-18 04:21:36,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:21:36,320 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 847 transitions. [2022-01-18 04:21:36,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:36,320 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 847 transitions. [2022-01-18 04:21:36,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:21:36,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:21:36,321 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:21:36,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 04:21:36,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-18 04:21:36,535 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:21:36,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:21:36,535 INFO L85 PathProgramCache]: Analyzing trace with hash -249146638, now seen corresponding path program 64 times [2022-01-18 04:21:36,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:21:36,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467417889] [2022-01-18 04:21:36,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:21:36,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:21:36,538 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:21:36,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533140214] [2022-01-18 04:21:36,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:21:36,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:21:36,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:21:36,539 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:21:36,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 04:21:36,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:21:36,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:21:36,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 04:21:36,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:21:37,251 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 04:21:37,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:21:39,740 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 04:21:39,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:21:39,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467417889] [2022-01-18 04:21:39,740 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:21:39,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533140214] [2022-01-18 04:21:39,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533140214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:21:39,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:21:39,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-01-18 04:21:39,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524596159] [2022-01-18 04:21:39,741 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:21:39,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:21:39,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:21:39,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:21:39,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:21:39,741 INFO L87 Difference]: Start difference. First operand 303 states and 847 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:43,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:21:43,248 INFO L93 Difference]: Finished difference Result 355 states and 967 transitions. [2022-01-18 04:21:43,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:21:43,250 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:21:43,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:21:43,251 INFO L225 Difference]: With dead ends: 355 [2022-01-18 04:21:43,251 INFO L226 Difference]: Without dead ends: 349 [2022-01-18 04:21:43,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=143, Invalid=506, Unknown=1, NotChecked=0, Total=650 [2022-01-18 04:21:43,251 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:21:43,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 19 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 99 Unchecked, 0.4s Time] [2022-01-18 04:21:43,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-18 04:21:43,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 310. [2022-01-18 04:21:43,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.8284789644012944) internal successors, (874), 309 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:43,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 874 transitions. [2022-01-18 04:21:43,256 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 874 transitions. Word has length 15 [2022-01-18 04:21:43,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:21:43,256 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 874 transitions. [2022-01-18 04:21:43,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:43,256 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 874 transitions. [2022-01-18 04:21:43,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:21:43,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:21:43,257 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:21:43,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-18 04:21:43,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-18 04:21:43,457 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:21:43,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:21:43,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1107426522, now seen corresponding path program 65 times [2022-01-18 04:21:43,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:21:43,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059060572] [2022-01-18 04:21:43,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:21:43,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:21:43,461 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:21:43,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248275857] [2022-01-18 04:21:43,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:21:43,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:21:43,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:21:43,462 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:21:43,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 04:21:43,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:21:43,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:21:43,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 04:21:43,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:21:44,225 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 04:21:44,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:21:46,737 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 04:21:46,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:21:46,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059060572] [2022-01-18 04:21:46,737 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:21:46,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248275857] [2022-01-18 04:21:46,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248275857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:21:46,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:21:46,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-01-18 04:21:46,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825972908] [2022-01-18 04:21:46,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:21:46,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:21:46,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:21:46,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:21:46,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:21:46,738 INFO L87 Difference]: Start difference. First operand 310 states and 874 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:49,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:21:49,192 INFO L93 Difference]: Finished difference Result 393 states and 1081 transitions. [2022-01-18 04:21:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:21:49,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:21:49,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:21:49,195 INFO L225 Difference]: With dead ends: 393 [2022-01-18 04:21:49,195 INFO L226 Difference]: Without dead ends: 387 [2022-01-18 04:21:49,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:21:49,196 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 04:21:49,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 27 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 123 Invalid, 0 Unknown, 300 Unchecked, 0.7s Time] [2022-01-18 04:21:49,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-18 04:21:49,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 327. [2022-01-18 04:21:49,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.8496932515337425) internal successors, (929), 326 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 929 transitions. [2022-01-18 04:21:49,201 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 929 transitions. Word has length 15 [2022-01-18 04:21:49,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:21:49,201 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 929 transitions. [2022-01-18 04:21:49,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:49,201 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 929 transitions. [2022-01-18 04:21:49,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:21:49,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:21:49,202 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:21:49,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 04:21:49,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-18 04:21:49,409 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:21:49,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:21:49,409 INFO L85 PathProgramCache]: Analyzing trace with hash -256408598, now seen corresponding path program 66 times [2022-01-18 04:21:49,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:21:49,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6916209] [2022-01-18 04:21:49,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:21:49,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:21:49,412 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:21:49,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423843103] [2022-01-18 04:21:49,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:21:49,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:21:49,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:21:49,413 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:21:49,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 04:21:49,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:21:49,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:21:49,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 04:21:49,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:21:50,044 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 04:21:50,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:21:51,897 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 04:21:51,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:21:51,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6916209] [2022-01-18 04:21:51,898 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:21:51,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423843103] [2022-01-18 04:21:51,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423843103] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:21:51,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:21:51,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-01-18 04:21:51,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341596519] [2022-01-18 04:21:51,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:21:51,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:21:51,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:21:51,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:21:51,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:21:51,899 INFO L87 Difference]: Start difference. First operand 327 states and 929 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:54,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:21:54,587 INFO L93 Difference]: Finished difference Result 408 states and 1093 transitions. [2022-01-18 04:21:54,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 04:21:54,588 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:21:54,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:21:54,590 INFO L225 Difference]: With dead ends: 408 [2022-01-18 04:21:54,590 INFO L226 Difference]: Without dead ends: 399 [2022-01-18 04:21:54,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:21:54,590 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:21:54,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 38 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 247 Invalid, 0 Unknown, 170 Unchecked, 1.5s Time] [2022-01-18 04:21:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-01-18 04:21:54,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 344. [2022-01-18 04:21:54,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.880466472303207) internal successors, (988), 343 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 988 transitions. [2022-01-18 04:21:54,595 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 988 transitions. Word has length 15 [2022-01-18 04:21:54,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:21:54,595 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 988 transitions. [2022-01-18 04:21:54,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:21:54,595 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 988 transitions. [2022-01-18 04:21:54,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:21:54,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:21:54,596 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:21:54,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 04:21:54,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:21:54,812 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:21:54,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:21:54,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1461935108, now seen corresponding path program 67 times [2022-01-18 04:21:54,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:21:54,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503624477] [2022-01-18 04:21:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:21:54,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:21:54,815 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:21:54,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811548362] [2022-01-18 04:21:54,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:21:54,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:21:54,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:21:54,816 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:21:54,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 04:21:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:21:54,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:21:54,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:21:54,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 04:21:55,140 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-01-18 04:21:55,141 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 27 treesize of output 22 [2022-01-18 04:21:55,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:21:55,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:21:55,659 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 04:21:55,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:21:58,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 52 treesize of output 48 [2022-01-18 04:22:02,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:22:02,008 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 27 treesize of output 32 [2022-01-18 04:22:02,040 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 95 treesize of output 89 [2022-01-18 04:22:04,480 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 04:22:04,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:22:04,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503624477] [2022-01-18 04:22:04,481 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:22:04,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811548362] [2022-01-18 04:22:04,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811548362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:22:04,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:22:04,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-01-18 04:22:04,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924235995] [2022-01-18 04:22:04,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:22:04,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:22:04,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:22:04,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:22:04,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:22:04,482 INFO L87 Difference]: Start difference. First operand 344 states and 988 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:22:05,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:22:05,321 INFO L93 Difference]: Finished difference Result 382 states and 1067 transitions. [2022-01-18 04:22:05,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:22:05,323 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:22:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:22:05,324 INFO L225 Difference]: With dead ends: 382 [2022-01-18 04:22:05,324 INFO L226 Difference]: Without dead ends: 379 [2022-01-18 04:22:05,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:22:05,325 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 04:22:05,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 16 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 122 Unchecked, 0.7s Time] [2022-01-18 04:22:05,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-01-18 04:22:05,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 345. [2022-01-18 04:22:05,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.883720930232558) internal successors, (992), 344 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:22:05,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 992 transitions. [2022-01-18 04:22:05,329 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 992 transitions. Word has length 15 [2022-01-18 04:22:05,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:22:05,329 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 992 transitions. [2022-01-18 04:22:05,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:22:05,330 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 992 transitions. [2022-01-18 04:22:05,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:22:05,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:22:05,330 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:22:05,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-18 04:22:05,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:22:05,547 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:22:05,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:22:05,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1351112588, now seen corresponding path program 68 times [2022-01-18 04:22:05,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:22:05,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833739619] [2022-01-18 04:22:05,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:22:05,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:22:05,550 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:22:05,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109501126] [2022-01-18 04:22:05,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:22:05,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:22:05,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:22:05,551 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:22:05,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 04:22:05,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:22:05,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:22:05,594 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 04:22:05,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:22:05,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:22:05,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:22:06,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:22:06,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 04:22:06,376 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 04:22:06,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:22:08,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 56 treesize of output 52 [2022-01-18 04:22:12,681 INFO L353 Elim1Store]: treesize reduction 10, result has 69.7 percent of original size [2022-01-18 04:22:12,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 44 [2022-01-18 04:22:12,723 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 84 treesize of output 78 [2022-01-18 04:22:15,727 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 04:22:15,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:22:15,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833739619] [2022-01-18 04:22:15,727 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:22:15,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109501126] [2022-01-18 04:22:15,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109501126] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:22:15,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:22:15,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-18 04:22:15,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971946915] [2022-01-18 04:22:15,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:22:15,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:22:15,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:22:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:22:15,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:22:15,728 INFO L87 Difference]: Start difference. First operand 345 states and 992 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:22:16,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:22:16,497 INFO L93 Difference]: Finished difference Result 386 states and 1079 transitions. [2022-01-18 04:22:16,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 04:22:16,500 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:22:16,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:22:16,501 INFO L225 Difference]: With dead ends: 386 [2022-01-18 04:22:16,501 INFO L226 Difference]: Without dead ends: 383 [2022-01-18 04:22:16,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:22:16,501 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:22:16,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 17 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 157 Unchecked, 0.5s Time] [2022-01-18 04:22:16,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-01-18 04:22:16,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 347. [2022-01-18 04:22:16,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.88728323699422) internal successors, (999), 346 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:22:16,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 999 transitions. [2022-01-18 04:22:16,506 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 999 transitions. Word has length 15 [2022-01-18 04:22:16,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:22:16,506 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 999 transitions. [2022-01-18 04:22:16,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:22:16,506 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 999 transitions. [2022-01-18 04:22:16,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:22:16,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:22:16,506 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:22:16,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 04:22:16,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:22:16,707 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:22:16,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:22:16,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1357368698, now seen corresponding path program 69 times [2022-01-18 04:22:16,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:22:16,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102903447] [2022-01-18 04:22:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:22:16,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:22:16,711 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:22:16,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114049909] [2022-01-18 04:22:16,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:22:16,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:22:16,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:22:16,712 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:22:16,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 04:22:16,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:22:16,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:22:16,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 04:22:16,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:22:17,356 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 04:22:17,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:22:19,440 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 04:22:19,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:22:19,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102903447] [2022-01-18 04:22:19,441 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:22:19,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114049909] [2022-01-18 04:22:19,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114049909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:22:19,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:22:19,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-01-18 04:22:19,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768218734] [2022-01-18 04:22:19,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:22:19,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:22:19,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:22:19,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:22:19,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:22:19,441 INFO L87 Difference]: Start difference. First operand 347 states and 999 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:22:21,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:22:21,606 INFO L93 Difference]: Finished difference Result 505 states and 1359 transitions. [2022-01-18 04:22:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 04:22:21,607 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:22:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:22:21,609 INFO L225 Difference]: With dead ends: 505 [2022-01-18 04:22:21,609 INFO L226 Difference]: Without dead ends: 496 [2022-01-18 04:22:21,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:22:21,609 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:22:21,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 26 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 219 Invalid, 0 Unknown, 145 Unchecked, 1.1s Time] [2022-01-18 04:22:21,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-01-18 04:22:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 353. [2022-01-18 04:22:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.897727272727273) internal successors, (1020), 352 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:22:21,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1020 transitions. [2022-01-18 04:22:21,615 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1020 transitions. Word has length 15 [2022-01-18 04:22:21,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:22:21,615 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1020 transitions. [2022-01-18 04:22:21,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:22:21,615 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1020 transitions. [2022-01-18 04:22:21,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:22:21,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:22:21,616 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:22:21,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-01-18 04:22:21,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-01-18 04:22:21,817 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:22:21,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:22:21,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1480369134, now seen corresponding path program 70 times [2022-01-18 04:22:21,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:22:21,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150527511] [2022-01-18 04:22:21,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:22:21,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:22:21,819 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:22:21,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970956427] [2022-01-18 04:22:21,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:22:21,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:22:21,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:22:21,820 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:22:21,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 04:22:21,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:22:21,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:22:21,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:22:21,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:22:21,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 04:22:22,157 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-01-18 04:22:22,157 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 27 treesize of output 22 [2022-01-18 04:22:22,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:22:22,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:22:22,632 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 04:22:22,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:22:25,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 52 treesize of output 48 [2022-01-18 04:22:29,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:22:29,020 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 27 treesize of output 32 [2022-01-18 04:22:29,042 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 95 treesize of output 89 [2022-01-18 04:22:31,511 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 04:22:31,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:22:31,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150527511] [2022-01-18 04:22:31,511 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:22:31,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970956427] [2022-01-18 04:22:31,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970956427] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:22:31,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:22:31,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-01-18 04:22:31,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627173520] [2022-01-18 04:22:31,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:22:31,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:22:31,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:22:31,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:22:31,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:22:31,512 INFO L87 Difference]: Start difference. First operand 353 states and 1020 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:22:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:22:32,746 INFO L93 Difference]: Finished difference Result 410 states and 1133 transitions. [2022-01-18 04:22:32,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:22:32,747 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:22:32,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:22:32,749 INFO L225 Difference]: With dead ends: 410 [2022-01-18 04:22:32,749 INFO L226 Difference]: Without dead ends: 406 [2022-01-18 04:22:32,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:22:32,749 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 35 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:22:32,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 26 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 220 Invalid, 0 Unknown, 238 Unchecked, 1.1s Time] [2022-01-18 04:22:32,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-01-18 04:22:32,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 354. [2022-01-18 04:22:32,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.9008498583569406) internal successors, (1024), 353 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:22:32,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1024 transitions. [2022-01-18 04:22:32,754 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1024 transitions. Word has length 15 [2022-01-18 04:22:32,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:22:32,754 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 1024 transitions. [2022-01-18 04:22:32,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:22:32,754 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1024 transitions. [2022-01-18 04:22:32,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:22:32,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:22:32,755 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:22:32,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 04:22:32,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:22:32,955 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:22:32,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:22:32,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1609263378, now seen corresponding path program 71 times [2022-01-18 04:22:32,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:22:32,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545790833] [2022-01-18 04:22:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:22:32,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:22:32,959 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:22:32,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859217817] [2022-01-18 04:22:32,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:22:32,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:22:32,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:22:32,960 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:22:32,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 04:22:33,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:22:33,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:22:33,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 04:22:33,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:22:33,695 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 04:22:33,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:22:56,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:22:56,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:22:56,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545790833] [2022-01-18 04:22:56,136 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:22:56,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859217817] [2022-01-18 04:22:56,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859217817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:22:56,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:22:56,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-01-18 04:22:56,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586288890] [2022-01-18 04:22:56,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:22:56,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:22:56,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:22:56,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:22:56,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=214, Unknown=9, NotChecked=0, Total=272 [2022-01-18 04:22:56,137 INFO L87 Difference]: Start difference. First operand 354 states and 1024 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:22:56,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:22:56,899 INFO L93 Difference]: Finished difference Result 390 states and 1101 transitions. [2022-01-18 04:22:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:22:56,901 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:22:56,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:22:56,902 INFO L225 Difference]: With dead ends: 390 [2022-01-18 04:22:56,902 INFO L226 Difference]: Without dead ends: 387 [2022-01-18 04:22:56,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=60, Invalid=237, Unknown=9, NotChecked=0, Total=306 [2022-01-18 04:22:56,903 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 04:22:56,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 108 Unchecked, 0.7s Time] [2022-01-18 04:22:56,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-18 04:22:56,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 361. [2022-01-18 04:22:56,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.9027777777777777) internal successors, (1045), 360 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:22:56,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1045 transitions. [2022-01-18 04:22:56,907 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1045 transitions. Word has length 15 [2022-01-18 04:22:56,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:22:56,908 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 1045 transitions. [2022-01-18 04:22:56,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:22:56,908 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1045 transitions. [2022-01-18 04:22:56,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:22:56,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:22:56,908 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:22:56,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 04:22:57,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:22:57,109 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:22:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:22:57,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1603007268, now seen corresponding path program 72 times [2022-01-18 04:22:57,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:22:57,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5318321] [2022-01-18 04:22:57,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:22:57,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:22:57,112 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:22:57,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772060775] [2022-01-18 04:22:57,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:22:57,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:22:57,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:22:57,113 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:22:57,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 04:22:57,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:22:57,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:22:57,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 04:22:57,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:22:57,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 04:22:57,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:22:57,539 INFO L353 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2022-01-18 04:22:57,539 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 30 treesize of output 25 [2022-01-18 04:22:57,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 04:22:57,939 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 04:22:57,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:23:00,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 42 [2022-01-18 04:23:05,401 INFO L353 Elim1Store]: treesize reduction 10, result has 69.7 percent of original size [2022-01-18 04:23:05,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 44 [2022-01-18 04:23:05,452 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 84 treesize of output 78 [2022-01-18 04:23:08,518 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 04:23:08,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:23:08,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5318321] [2022-01-18 04:23:08,519 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:23:08,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772060775] [2022-01-18 04:23:08,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772060775] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:23:08,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:23:08,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-18 04:23:08,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403797249] [2022-01-18 04:23:08,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:23:08,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:23:08,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:23:08,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:23:08,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:23:08,519 INFO L87 Difference]: Start difference. First operand 361 states and 1045 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:23:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:23:09,718 INFO L93 Difference]: Finished difference Result 406 states and 1136 transitions. [2022-01-18 04:23:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 04:23:09,720 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:23:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:23:09,722 INFO L225 Difference]: With dead ends: 406 [2022-01-18 04:23:09,722 INFO L226 Difference]: Without dead ends: 404 [2022-01-18 04:23:09,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:23:09,722 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:23:09,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 24 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 172 Unchecked, 0.6s Time] [2022-01-18 04:23:09,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-18 04:23:09,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 363. [2022-01-18 04:23:09,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.9060773480662982) internal successors, (1052), 362 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:23:09,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1052 transitions. [2022-01-18 04:23:09,727 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1052 transitions. Word has length 15 [2022-01-18 04:23:09,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:23:09,727 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1052 transitions. [2022-01-18 04:23:09,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:23:09,727 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1052 transitions. [2022-01-18 04:23:09,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:23:09,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:23:09,728 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:23:09,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 04:23:09,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-01-18 04:23:09,928 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:23:09,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:23:09,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1852114170, now seen corresponding path program 73 times [2022-01-18 04:23:09,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:23:09,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603289848] [2022-01-18 04:23:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:23:09,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:23:09,932 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:23:09,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81200788] [2022-01-18 04:23:09,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:23:09,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:23:09,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:23:09,933 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:23:09,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 04:23:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:23:09,980 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 04:23:09,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:23:10,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:23:10,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:23:10,392 INFO L353 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2022-01-18 04:23:10,392 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 30 treesize of output 25 [2022-01-18 04:23:10,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 04:23:10,742 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 04:23:10,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:23:12,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 42 [2022-01-18 04:23:19,304 INFO L353 Elim1Store]: treesize reduction 10, result has 69.7 percent of original size [2022-01-18 04:23:19,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 44 [2022-01-18 04:23:19,349 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 178 treesize of output 166 [2022-01-18 04:23:22,550 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 04:23:22,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:23:22,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603289848] [2022-01-18 04:23:22,551 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:23:22,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81200788] [2022-01-18 04:23:22,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81200788] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:23:22,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:23:22,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-18 04:23:22,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763914886] [2022-01-18 04:23:22,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:23:22,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:23:22,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:23:22,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:23:22,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:23:22,552 INFO L87 Difference]: Start difference. First operand 363 states and 1052 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:23:24,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:23:24,086 INFO L93 Difference]: Finished difference Result 428 states and 1179 transitions. [2022-01-18 04:23:24,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 04:23:24,088 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:23:24,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:23:24,090 INFO L225 Difference]: With dead ends: 428 [2022-01-18 04:23:24,090 INFO L226 Difference]: Without dead ends: 422 [2022-01-18 04:23:24,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:23:24,090 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:23:24,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 30 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 208 Invalid, 0 Unknown, 315 Unchecked, 1.0s Time] [2022-01-18 04:23:24,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-01-18 04:23:24,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 363. [2022-01-18 04:23:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.9060773480662982) internal successors, (1052), 362 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:23:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1052 transitions. [2022-01-18 04:23:24,095 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1052 transitions. Word has length 15 [2022-01-18 04:23:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:23:24,095 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1052 transitions. [2022-01-18 04:23:24,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:23:24,095 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1052 transitions. [2022-01-18 04:23:24,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:23:24,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:23:24,096 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:23:24,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 04:23:24,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-01-18 04:23:24,296 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:23:24,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:23:24,297 INFO L85 PathProgramCache]: Analyzing trace with hash -425355478, now seen corresponding path program 74 times [2022-01-18 04:23:24,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:23:24,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754489809] [2022-01-18 04:23:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:23:24,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:23:24,300 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:23:24,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839018381] [2022-01-18 04:23:24,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:23:24,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:23:24,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:23:24,301 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:23:24,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 04:23:24,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:23:24,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:23:24,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 04:23:24,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:23:24,939 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 04:23:24,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:23:27,180 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 04:23:27,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:23:27,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754489809] [2022-01-18 04:23:27,181 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:23:27,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839018381] [2022-01-18 04:23:27,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839018381] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:23:27,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:23:27,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-01-18 04:23:27,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919405602] [2022-01-18 04:23:27,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:23:27,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:23:27,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:23:27,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:23:27,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:23:27,182 INFO L87 Difference]: Start difference. First operand 363 states and 1052 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:23:28,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:23:28,423 INFO L93 Difference]: Finished difference Result 474 states and 1308 transitions. [2022-01-18 04:23:28,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:23:28,425 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:23:28,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:23:28,427 INFO L225 Difference]: With dead ends: 474 [2022-01-18 04:23:28,427 INFO L226 Difference]: Without dead ends: 470 [2022-01-18 04:23:28,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:23:28,427 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 04:23:28,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 18 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 149 Unchecked, 0.9s Time] [2022-01-18 04:23:28,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-18 04:23:28,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 362. [2022-01-18 04:23:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.903047091412742) internal successors, (1048), 361 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:23:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1048 transitions. [2022-01-18 04:23:28,432 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1048 transitions. Word has length 15 [2022-01-18 04:23:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:23:28,433 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1048 transitions. [2022-01-18 04:23:28,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:23:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1048 transitions. [2022-01-18 04:23:28,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:23:28,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:23:28,433 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:23:28,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 04:23:28,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:23:28,634 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:23:28,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:23:28,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1139091700, now seen corresponding path program 75 times [2022-01-18 04:23:28,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:23:28,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008733763] [2022-01-18 04:23:28,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:23:28,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:23:28,637 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:23:28,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377929136] [2022-01-18 04:23:28,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:23:28,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:23:28,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:23:28,638 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:23:28,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 04:23:28,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:23:28,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:23:28,682 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 04:23:28,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:23:28,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 04:23:28,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-18 04:23:29,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:23:29,126 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 17 treesize of output 13 [2022-01-18 04:23:29,420 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 04:23:29,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:23:30,951 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 40 treesize of output 34 [2022-01-18 04:23:34,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:23:34,073 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 28 treesize of output 33 [2022-01-18 04:23:34,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 78 treesize of output 74 [2022-01-18 04:23:35,910 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 04:23:35,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:23:35,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008733763] [2022-01-18 04:23:35,911 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:23:35,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377929136] [2022-01-18 04:23:35,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377929136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:23:35,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:23:35,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-01-18 04:23:35,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919453251] [2022-01-18 04:23:35,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:23:35,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:23:35,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:23:35,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:23:35,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:23:35,912 INFO L87 Difference]: Start difference. First operand 362 states and 1048 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:23:39,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:23:39,770 INFO L93 Difference]: Finished difference Result 505 states and 1389 transitions. [2022-01-18 04:23:39,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:23:39,773 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:23:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:23:39,775 INFO L225 Difference]: With dead ends: 505 [2022-01-18 04:23:39,775 INFO L226 Difference]: Without dead ends: 502 [2022-01-18 04:23:39,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 04:23:39,775 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 65 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:23:39,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 55 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 106 Invalid, 0 Unknown, 259 Unchecked, 0.6s Time] [2022-01-18 04:23:39,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-01-18 04:23:39,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 364. [2022-01-18 04:23:39,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.9035812672176307) internal successors, (1054), 363 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:23:39,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1054 transitions. [2022-01-18 04:23:39,781 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1054 transitions. Word has length 15 [2022-01-18 04:23:39,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:23:39,781 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 1054 transitions. [2022-01-18 04:23:39,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:23:39,781 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1054 transitions. [2022-01-18 04:23:39,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:23:39,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:23:39,782 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:23:39,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 04:23:39,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:23:39,982 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:23:39,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:23:39,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1120657674, now seen corresponding path program 76 times [2022-01-18 04:23:39,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:23:39,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528239101] [2022-01-18 04:23:39,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:23:39,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:23:39,985 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:23:39,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950677113] [2022-01-18 04:23:39,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:23:39,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:23:39,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:23:39,986 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:23:39,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 04:23:40,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:23:40,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:23:40,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 04:23:40,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:23:40,908 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 04:23:40,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:23:42,761 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 04:23:42,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:23:42,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528239101] [2022-01-18 04:23:42,761 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:23:42,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950677113] [2022-01-18 04:23:42,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950677113] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:23:42,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:23:42,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-01-18 04:23:42,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917504733] [2022-01-18 04:23:42,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:23:42,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:23:42,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:23:42,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:23:42,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:23:42,762 INFO L87 Difference]: Start difference. First operand 364 states and 1054 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:23:49,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:23:49,977 INFO L93 Difference]: Finished difference Result 884 states and 2439 transitions. [2022-01-18 04:23:49,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 04:23:49,981 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:23:49,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:23:49,983 INFO L225 Difference]: With dead ends: 884 [2022-01-18 04:23:49,984 INFO L226 Difference]: Without dead ends: 773 [2022-01-18 04:23:49,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=435, Invalid=1545, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 04:23:49,984 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 127 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:23:49,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 62 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 358 Invalid, 0 Unknown, 180 Unchecked, 2.6s Time] [2022-01-18 04:23:49,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-01-18 04:23:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 384. [2022-01-18 04:23:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.8903394255874675) internal successors, (1107), 383 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:23:49,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1107 transitions. [2022-01-18 04:23:49,992 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1107 transitions. Word has length 15 [2022-01-18 04:23:49,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:23:49,992 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1107 transitions. [2022-01-18 04:23:49,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:23:49,992 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1107 transitions. [2022-01-18 04:23:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:23:49,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:23:49,993 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:23:50,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 04:23:50,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-01-18 04:23:50,193 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:23:50,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:23:50,193 INFO L85 PathProgramCache]: Analyzing trace with hash -364773296, now seen corresponding path program 77 times [2022-01-18 04:23:50,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:23:50,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384577395] [2022-01-18 04:23:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:23:50,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:23:50,196 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:23:50,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485149877] [2022-01-18 04:23:50,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:23:50,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:23:50,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:23:50,197 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:23:50,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 04:23:50,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:23:50,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:23:50,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 04:23:50,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:23:50,830 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 04:23:50,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:23:52,887 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 04:23:52,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:23:52,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384577395] [2022-01-18 04:23:52,888 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:23:52,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485149877] [2022-01-18 04:23:52,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485149877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:23:52,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:23:52,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-18 04:23:52,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229292573] [2022-01-18 04:23:52,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:23:52,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:23:52,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:23:52,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:23:52,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:23:52,888 INFO L87 Difference]: Start difference. First operand 384 states and 1107 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:23:54,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:23:54,531 INFO L93 Difference]: Finished difference Result 550 states and 1542 transitions. [2022-01-18 04:23:54,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:23:54,534 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:23:54,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:23:54,536 INFO L225 Difference]: With dead ends: 550 [2022-01-18 04:23:54,536 INFO L226 Difference]: Without dead ends: 543 [2022-01-18 04:23:54,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:23:54,536 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:23:54,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 55 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 206 Invalid, 0 Unknown, 107 Unchecked, 1.3s Time] [2022-01-18 04:23:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-01-18 04:23:54,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 384. [2022-01-18 04:23:54,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.887728459530026) internal successors, (1106), 383 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:23:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1106 transitions. [2022-01-18 04:23:54,546 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1106 transitions. Word has length 15 [2022-01-18 04:23:54,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:23:54,546 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1106 transitions. [2022-01-18 04:23:54,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:23:54,546 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1106 transitions. [2022-01-18 04:23:54,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:23:54,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:23:54,547 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:23:54,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-01-18 04:23:54,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-01-18 04:23:54,747 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:23:54,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:23:54,748 INFO L85 PathProgramCache]: Analyzing trace with hash 206681510, now seen corresponding path program 78 times [2022-01-18 04:23:54,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:23:54,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273581730] [2022-01-18 04:23:54,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:23:54,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:23:54,750 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:23:54,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658790767] [2022-01-18 04:23:54,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:23:54,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:23:54,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:23:54,751 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:23:54,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 04:23:54,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:23:54,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:23:54,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:23:54,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:23:54,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:23:55,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:23:55,243 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 22 treesize of output 16 [2022-01-18 04:23:55,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 04:23:55,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:23:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:23:55,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:23:57,480 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 210 treesize of output 198 [2022-01-18 04:24:03,494 INFO L353 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-01-18 04:24:03,495 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 31 treesize of output 31 [2022-01-18 04:24:03,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:24:04,199 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 04:24:04,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:24:04,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273581730] [2022-01-18 04:24:04,199 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:24:04,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658790767] [2022-01-18 04:24:04,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658790767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:24:04,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:24:04,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-18 04:24:04,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959364467] [2022-01-18 04:24:04,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:24:04,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:24:04,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:24:04,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:24:04,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:24:04,200 INFO L87 Difference]: Start difference. First operand 384 states and 1106 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:24:04,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:24:04,795 INFO L93 Difference]: Finished difference Result 437 states and 1219 transitions. [2022-01-18 04:24:04,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:24:04,798 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:24:04,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:24:04,799 INFO L225 Difference]: With dead ends: 437 [2022-01-18 04:24:04,799 INFO L226 Difference]: Without dead ends: 434 [2022-01-18 04:24:04,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:24:04,799 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:24:04,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 45 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 86 Unchecked, 0.6s Time] [2022-01-18 04:24:04,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-01-18 04:24:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 385. [2022-01-18 04:24:04,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.8828125) internal successors, (1107), 384 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:24:04,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1107 transitions. [2022-01-18 04:24:04,804 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1107 transitions. Word has length 15 [2022-01-18 04:24:04,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:24:04,805 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1107 transitions. [2022-01-18 04:24:04,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:24:04,805 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1107 transitions. [2022-01-18 04:24:04,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:24:04,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:24:04,805 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:24:04,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-18 04:24:05,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:24:05,006 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:24:05,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:24:05,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1935728844, now seen corresponding path program 79 times [2022-01-18 04:24:05,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:24:05,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857618000] [2022-01-18 04:24:05,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:24:05,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:24:05,008 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:24:05,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814177404] [2022-01-18 04:24:05,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:24:05,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:24:05,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:24:05,010 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:24:05,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 04:24:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:24:05,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:24:05,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:24:05,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:24:05,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:24:05,420 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 17 treesize of output 13 [2022-01-18 04:24:05,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:24:05,815 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 04:24:05,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:24:08,244 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 210 treesize of output 198 [2022-01-18 04:24:13,510 INFO L353 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-01-18 04:24:13,510 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 31 treesize of output 31 [2022-01-18 04:24:13,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-01-18 04:24:14,236 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 04:24:14,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:24:14,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857618000] [2022-01-18 04:24:14,237 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-18 04:24:14,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814177404] [2022-01-18 04:24:14,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814177404] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:24:14,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-18 04:24:14,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-18 04:24:14,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639264206] [2022-01-18 04:24:14,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-18 04:24:14,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:24:14,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:24:14,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:24:14,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:24:14,239 INFO L87 Difference]: Start difference. First operand 385 states and 1107 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:24:15,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:24:15,376 INFO L93 Difference]: Finished difference Result 518 states and 1433 transitions. [2022-01-18 04:24:15,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:24:15,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:24:15,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:24:15,379 INFO L225 Difference]: With dead ends: 518 [2022-01-18 04:24:15,379 INFO L226 Difference]: Without dead ends: 515 [2022-01-18 04:24:15,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:24:15,380 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 53 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 04:24:15,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 39 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 136 Invalid, 0 Unknown, 219 Unchecked, 0.9s Time] [2022-01-18 04:24:15,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-01-18 04:24:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 385. [2022-01-18 04:24:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.8828125) internal successors, (1107), 384 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:24:15,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1107 transitions. [2022-01-18 04:24:15,386 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1107 transitions. Word has length 15 [2022-01-18 04:24:15,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:24:15,386 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1107 transitions. [2022-01-18 04:24:15,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:24:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1107 transitions. [2022-01-18 04:24:15,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:24:15,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:24:15,386 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:24:15,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-18 04:24:15,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-01-18 04:24:15,595 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:24:15,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:24:15,595 INFO L85 PathProgramCache]: Analyzing trace with hash -640894746, now seen corresponding path program 80 times [2022-01-18 04:24:15,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:24:15,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138832537] [2022-01-18 04:24:15,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:24:15,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:24:15,597 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-18 04:24:15,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358717367] [2022-01-18 04:24:15,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:24:15,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:24:15,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:24:15,598 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 04:24:15,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 04:24:15,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:24:15,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:24:15,644 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 04:24:15,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:24:15,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:24:15,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 04:24:16,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 04:24:16,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 04:24:16,367 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 04:24:16,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:24:18,542 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 226 treesize of output 214 Received shutdown request... [2022-01-18 04:24:34,210 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-18 04:24:34,212 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 04:24:34,224 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 04:24:34,237 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 04:24:34,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-01-18 04:24:34,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:24:34,420 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 2ms.. [2022-01-18 04:24:34,421 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 04:24:34,421 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 04:24:34,423 INFO L732 BasicCegarLoop]: Path program histogram: [80, 1, 1, 1] [2022-01-18 04:24:34,424 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 04:24:34,424 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 04:24:34,425 INFO L202 PluginConnector]: Adding new model loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 04:24:34 BasicIcfg [2022-01-18 04:24:34,426 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 04:24:34,426 INFO L158 Benchmark]: Toolchain (without parser) took 877343.62ms. Allocated memory was 373.3MB in the beginning and 520.1MB in the end (delta: 146.8MB). Free memory was 335.0MB in the beginning and 491.5MB in the end (delta: -156.5MB). Peak memory consumption was 298.3MB. Max. memory is 16.0GB. [2022-01-18 04:24:34,426 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 373.3MB. Free memory is still 336.2MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 04:24:34,426 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.35ms. Allocated memory is still 373.3MB. Free memory was 335.0MB in the beginning and 333.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 04:24:34,426 INFO L158 Benchmark]: Boogie Preprocessor took 21.21ms. Allocated memory is still 373.3MB. Free memory was 333.5MB in the beginning and 332.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 04:24:34,426 INFO L158 Benchmark]: RCFGBuilder took 166.93ms. Allocated memory is still 373.3MB. Free memory was 332.4MB in the beginning and 322.8MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 04:24:34,426 INFO L158 Benchmark]: TraceAbstraction took 877122.48ms. Allocated memory was 373.3MB in the beginning and 520.1MB in the end (delta: 146.8MB). Free memory was 322.3MB in the beginning and 491.5MB in the end (delta: -169.2MB). Peak memory consumption was 285.7MB. Max. memory is 16.0GB. [2022-01-18 04:24:34,426 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10ms. Allocated memory is still 373.3MB. Free memory is still 336.2MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 21.35ms. Allocated memory is still 373.3MB. Free memory was 335.0MB in the beginning and 333.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 21.21ms. Allocated memory is still 373.3MB. Free memory was 333.5MB in the beginning and 332.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 166.93ms. Allocated memory is still 373.3MB. Free memory was 332.4MB in the beginning and 322.8MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 877122.48ms. Allocated memory was 373.3MB in the beginning and 520.1MB in the end (delta: 146.8MB). Free memory was 322.3MB in the beginning and 491.5MB in the end (delta: -169.2MB). Peak memory consumption was 285.7MB. 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: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 2ms.. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 2ms.. - 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 16 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 2ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 25 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 877.0s, OverallIterations: 83, TraceHistogramMax: 2, PathProgramHistogramMax: 80, EmptinessCheckTime: 0.0s, AutomataDifference: 232.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2564 SdHoareTripleChecker+Valid, 48.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2564 mSDsluCounter, 2398 SdHoareTripleChecker+Invalid, 41.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 12020 IncrementalHoareTripleChecker+Unchecked, 8379 mSDsCounter, 309 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12094 IncrementalHoareTripleChecker+Invalid, 24423 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 309 mSolverCounterUnsat, 474 mSDtfsCounter, 12094 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2576 GetRequests, 1011 SyntacticMatches, 38 SemanticMatches, 1527 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 7922 ImplicationChecksByTransitivity, 453.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=385occurred in iteration=81, InterpolantAutomatonStates: 1114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 82 MinimizatonAttempts, 3840 StatesRemovedByMinimization, 80 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 604.5s InterpolantComputationTime, 1188 NumberOfCodeBlocks, 1187 NumberOfCodeBlocksAsserted, 178 NumberOfCheckSat, 2192 ConstructedInterpolants, 677 QuantifiedInterpolants, 35787 SizeOfPredicates, 1166 NumberOfNonLiveVariables, 4109 ConjunctsInSsa, 1666 ConjunctsInUnsatCore, 162 InterpolantComputations, 2 PerfectInterpolantSequences, 38/667 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