/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.abstract-por-f0ea240 [2022-02-11 01:16:52,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-11 01:16:52,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-11 01:16:52,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-11 01:16:52,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-11 01:16:52,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-11 01:16:52,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-11 01:16:52,148 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-02-11 01:16:52,180 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-11 01:16:52,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-11 01:16:52,181 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-11 01:16:52,181 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-11 01:16:52,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-11 01:16:52,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-11 01:16:52,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-11 01:16:52,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-11 01:16:52,182 INFO L138 SettingsManager]: * Use SBE=true [2022-02-11 01:16:52,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-11 01:16:52,182 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-11 01:16:52,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-11 01:16:52,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-11 01:16:52,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-11 01:16:52,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-11 01:16:52,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-11 01:16:52,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-11 01:16:52,183 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-11 01:16:52,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-11 01:16:52,183 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-11 01:16:52,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-11 01:16:52,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-11 01:16:52,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-11 01:16:52,184 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-11 01:16:52,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-11 01:16:52,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 01:16:52,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-11 01:16:52,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-11 01:16:52,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-11 01:16:52,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-11 01:16:52,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-11 01:16:52,185 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-11 01:16:52,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-11 01:16:52,185 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-11 01:16:52,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-11 01:16:52,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-11 01:16:52,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-11 01:16:52,384 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-11 01:16:52,385 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-11 01:16:52,386 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl [2022-02-11 01:16:52,388 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl' [2022-02-11 01:16:52,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-11 01:16:52,408 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-11 01:16:52,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-11 01:16:52,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-11 01:16:52,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-11 01:16:52,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:16:52" (1/1) ... [2022-02-11 01:16:52,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:16:52" (1/1) ... [2022-02-11 01:16:52,431 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-11 01:16:52,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-11 01:16:52,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-11 01:16:52,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-11 01:16:52,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-11 01:16:52,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:16:52" (1/1) ... [2022-02-11 01:16:52,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:16:52" (1/1) ... [2022-02-11 01:16:52,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:16:52" (1/1) ... [2022-02-11 01:16:52,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:16:52" (1/1) ... [2022-02-11 01:16:52,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:16:52" (1/1) ... [2022-02-11 01:16:52,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:16:52" (1/1) ... [2022-02-11 01:16:52,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:16:52" (1/1) ... [2022-02-11 01:16:52,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-11 01:16:52,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-11 01:16:52,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-11 01:16:52,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-11 01:16:52,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:16:52" (1/1) ... [2022-02-11 01:16:52,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 01:16:52,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:52,472 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-11 01:16:52,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-11 01:16:52,506 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-11 01:16:52,506 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-11 01:16:52,506 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-11 01:16:52,506 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-11 01:16:52,506 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-11 01:16:52,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-11 01:16:52,507 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-11 01:16:52,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-11 01:16:52,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-11 01:16:52,507 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-11 01:16:52,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-11 01:16:52,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-11 01:16:52,507 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-02-11 01:16:52,508 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-02-11 01:16:52,508 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-02-11 01:16:52,508 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-11 01:16:52,543 INFO L234 CfgBuilder]: Building ICFG [2022-02-11 01:16:52,544 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-11 01:16:52,624 INFO L275 CfgBuilder]: Performing block encoding [2022-02-11 01:16:52,640 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-11 01:16:52,641 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-11 01:16:52,642 INFO L202 PluginConnector]: Adding new model buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:16:52 BoogieIcfgContainer [2022-02-11 01:16:52,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-11 01:16:52,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-11 01:16:52,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-11 01:16:52,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-11 01:16:52,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:16:52" (1/2) ... [2022-02-11 01:16:52,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a318c58 and model type buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 01:16:52, skipping insertion in model container [2022-02-11 01:16:52,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:16:52" (2/2) ... [2022-02-11 01:16:52,649 INFO L112 eAbstractionObserver]: Analyzing ICFG buffer-series.wvr.bpl [2022-02-11 01:16:52,653 WARN L154 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-11 01:16:52,654 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-11 01:16:52,654 INFO L168 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-11 01:16:52,654 INFO L538 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-11 01:16:52,715 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-02-11 01:16:52,813 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-11 01:16:52,823 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 [2022-02-11 01:16:52,823 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-02-11 01:16:52,830 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2022-02-11 01:16:52,931 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:52,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:52,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 01:16:52,961 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:52,961 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:52,962 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:16:52,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:52,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1445873811, now seen corresponding path program 1 times [2022-02-11 01:16:52,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:52,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032920979] [2022-02-11 01:16:52,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:52,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:53,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:53,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032920979] [2022-02-11 01:16:53,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032920979] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:16:53,098 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:16:53,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-11 01:16:53,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394582043] [2022-02-11 01:16:53,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:16:53,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 01:16:53,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:53,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 01:16:53,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 01:16:53,216 INFO L87 Difference]: Start difference. First operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:53,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:53,302 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2022-02-11 01:16:53,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 01:16:53,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 01:16:53,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:53,333 INFO L225 Difference]: With dead ends: 1236 [2022-02-11 01:16:53,333 INFO L226 Difference]: Without dead ends: 1109 [2022-02-11 01:16:53,334 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 01:16:53,338 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:53,338 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:16:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-02-11 01:16:53,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2022-02-11 01:16:53,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:53,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2022-02-11 01:16:53,491 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2022-02-11 01:16:53,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:53,492 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2022-02-11 01:16:53,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:53,493 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2022-02-11 01:16:53,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 01:16:53,497 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:53,497 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:53,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-11 01:16:53,498 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:16:53,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:53,499 INFO L85 PathProgramCache]: Analyzing trace with hash 925045909, now seen corresponding path program 1 times [2022-02-11 01:16:53,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:53,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240880352] [2022-02-11 01:16:53,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:53,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:53,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:53,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240880352] [2022-02-11 01:16:53,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240880352] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:16:53,564 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:16:53,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 01:16:53,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189016302] [2022-02-11 01:16:53,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:16:53,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:16:53,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:53,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:16:53,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:16:53,567 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:53,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:53,678 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2022-02-11 01:16:53,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 01:16:53,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 01:16:53,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:53,689 INFO L225 Difference]: With dead ends: 1524 [2022-02-11 01:16:53,690 INFO L226 Difference]: Without dead ends: 1418 [2022-02-11 01:16:53,692 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:16:53,693 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:53,694 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 35 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:16:53,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2022-02-11 01:16:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2022-02-11 01:16:53,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2022-02-11 01:16:53,762 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2022-02-11 01:16:53,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:53,763 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2022-02-11 01:16:53,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:53,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2022-02-11 01:16:53,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 01:16:53,768 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:53,768 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:53,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-11 01:16:53,768 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:16:53,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:53,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1282496465, now seen corresponding path program 1 times [2022-02-11 01:16:53,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:53,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145482493] [2022-02-11 01:16:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:53,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:53,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:53,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145482493] [2022-02-11 01:16:53,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145482493] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:16:53,873 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:16:53,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 01:16:53,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073527066] [2022-02-11 01:16:53,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:16:53,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:16:53,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:53,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:16:53,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:16:53,877 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:53,982 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2022-02-11 01:16:53,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 01:16:53,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 01:16:53,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:53,996 INFO L225 Difference]: With dead ends: 2017 [2022-02-11 01:16:53,997 INFO L226 Difference]: Without dead ends: 1875 [2022-02-11 01:16:53,997 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:16:54,003 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:54,004 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:16:54,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-02-11 01:16:54,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2022-02-11 01:16:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:54,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2022-02-11 01:16:54,068 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2022-02-11 01:16:54,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:54,068 INFO L470 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2022-02-11 01:16:54,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:54,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2022-02-11 01:16:54,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:16:54,074 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:54,074 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:54,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-11 01:16:54,074 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:16:54,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:54,076 INFO L85 PathProgramCache]: Analyzing trace with hash 770950601, now seen corresponding path program 1 times [2022-02-11 01:16:54,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:54,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304870452] [2022-02-11 01:16:54,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:54,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:16:54,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:54,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304870452] [2022-02-11 01:16:54,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304870452] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:54,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682334264] [2022-02-11 01:16:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:54,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:54,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:54,151 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:54,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-11 01:16:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:54,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-11 01:16:54,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:16:54,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:16:54,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682334264] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:54,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:54,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-02-11 01:16:54,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596645672] [2022-02-11 01:16:54,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:54,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:16:54,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:54,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:16:54,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:16:54,420 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:54,609 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2022-02-11 01:16:54,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 01:16:54,611 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:16:54,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:54,626 INFO L225 Difference]: With dead ends: 2308 [2022-02-11 01:16:54,626 INFO L226 Difference]: Without dead ends: 2108 [2022-02-11 01:16:54,629 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:16:54,630 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:54,630 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 54 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:16:54,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2022-02-11 01:16:54,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2022-02-11 01:16:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:54,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2022-02-11 01:16:54,704 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2022-02-11 01:16:54,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:54,705 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2022-02-11 01:16:54,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:54,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2022-02-11 01:16:54,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:16:54,710 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:54,710 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:54,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:54,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:54,932 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:16:54,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:54,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1120776452, now seen corresponding path program 1 times [2022-02-11 01:16:54,933 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:54,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22445850] [2022-02-11 01:16:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:54,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:16:54,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:54,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22445850] [2022-02-11 01:16:54,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22445850] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:16:54,967 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:16:54,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 01:16:54,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071500024] [2022-02-11 01:16:54,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:16:54,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:16:54,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:54,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:16:54,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:16:54,969 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2022-02-11 01:16:55,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:55,081 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2022-02-11 01:16:55,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 01:16:55,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 24 [2022-02-11 01:16:55,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:55,094 INFO L225 Difference]: With dead ends: 1950 [2022-02-11 01:16:55,094 INFO L226 Difference]: Without dead ends: 1860 [2022-02-11 01:16:55,094 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:16:55,095 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 64 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:55,095 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 17 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:16:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-02-11 01:16:55,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2022-02-11 01:16:55,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2022-02-11 01:16:55,147 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2022-02-11 01:16:55,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:55,148 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2022-02-11 01:16:55,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2022-02-11 01:16:55,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2022-02-11 01:16:55,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:16:55,161 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:55,161 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:55,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-11 01:16:55,162 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:16:55,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:55,163 INFO L85 PathProgramCache]: Analyzing trace with hash 712551812, now seen corresponding path program 2 times [2022-02-11 01:16:55,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:55,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480148783] [2022-02-11 01:16:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:55,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:16:55,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:55,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480148783] [2022-02-11 01:16:55,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480148783] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:16:55,214 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:16:55,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 01:16:55,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40185030] [2022-02-11 01:16:55,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:16:55,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:16:55,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:55,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:16:55,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:16:55,215 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2022-02-11 01:16:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:55,301 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2022-02-11 01:16:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 01:16:55,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 24 [2022-02-11 01:16:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:55,309 INFO L225 Difference]: With dead ends: 1308 [2022-02-11 01:16:55,309 INFO L226 Difference]: Without dead ends: 1308 [2022-02-11 01:16:55,309 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:16:55,310 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:55,310 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:16:55,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-02-11 01:16:55,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2022-02-11 01:16:55,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:55,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2022-02-11 01:16:55,343 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2022-02-11 01:16:55,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:55,343 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2022-02-11 01:16:55,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2022-02-11 01:16:55,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2022-02-11 01:16:55,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:16:55,346 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:55,347 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:55,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-11 01:16:55,347 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:16:55,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:55,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1043177095, now seen corresponding path program 2 times [2022-02-11 01:16:55,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:55,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610118455] [2022-02-11 01:16:55,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:55,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:16:55,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:55,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610118455] [2022-02-11 01:16:55,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610118455] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:16:55,405 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:16:55,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 01:16:55,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110216450] [2022-02-11 01:16:55,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:16:55,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:16:55,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:55,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:16:55,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:16:55,406 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2022-02-11 01:16:55,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:55,476 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2022-02-11 01:16:55,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 01:16:55,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 24 [2022-02-11 01:16:55,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:55,483 INFO L225 Difference]: With dead ends: 1142 [2022-02-11 01:16:55,483 INFO L226 Difference]: Without dead ends: 1120 [2022-02-11 01:16:55,484 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:16:55,485 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:55,485 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:16:55,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-02-11 01:16:55,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2022-02-11 01:16:55,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:55,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2022-02-11 01:16:55,515 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2022-02-11 01:16:55,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:55,515 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2022-02-11 01:16:55,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2022-02-11 01:16:55,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2022-02-11 01:16:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:16:55,519 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:55,520 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:55,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-11 01:16:55,520 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:16:55,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:55,522 INFO L85 PathProgramCache]: Analyzing trace with hash 2066683916, now seen corresponding path program 1 times [2022-02-11 01:16:55,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:55,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431963825] [2022-02-11 01:16:55,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:55,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:16:55,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:55,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431963825] [2022-02-11 01:16:55,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431963825] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:16:55,556 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:16:55,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 01:16:55,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477641674] [2022-02-11 01:16:55,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:16:55,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:16:55,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:55,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:16:55,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:16:55,557 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-02-11 01:16:55,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:55,603 INFO L93 Difference]: Finished difference Result 1334 states and 4929 transitions. [2022-02-11 01:16:55,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 01:16:55,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2022-02-11 01:16:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:55,612 INFO L225 Difference]: With dead ends: 1334 [2022-02-11 01:16:55,612 INFO L226 Difference]: Without dead ends: 1334 [2022-02-11 01:16:55,614 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:16:55,614 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:55,615 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 52 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:16:55,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2022-02-11 01:16:55,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 954. [2022-02-11 01:16:55,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.63903462749213) internal successors, (3468), 953 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:55,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3468 transitions. [2022-02-11 01:16:55,672 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3468 transitions. Word has length 27 [2022-02-11 01:16:55,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:55,672 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 3468 transitions. [2022-02-11 01:16:55,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-02-11 01:16:55,673 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3468 transitions. [2022-02-11 01:16:55,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:16:55,676 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:55,676 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:55,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-11 01:16:55,676 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:16:55,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:55,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1787495248, now seen corresponding path program 1 times [2022-02-11 01:16:55,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:55,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844547064] [2022-02-11 01:16:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:55,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:16:55,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:55,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844547064] [2022-02-11 01:16:55,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844547064] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:55,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782928060] [2022-02-11 01:16:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:55,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:55,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:55,701 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:55,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-11 01:16:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:55,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-11 01:16:55,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:16:55,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-11 01:16:55,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782928060] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:16:55,808 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-11 01:16:55,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-02-11 01:16:55,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478851070] [2022-02-11 01:16:55,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:16:55,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:16:55,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:55,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:16:55,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:16:55,810 INFO L87 Difference]: Start difference. First operand 954 states and 3468 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-02-11 01:16:55,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:55,851 INFO L93 Difference]: Finished difference Result 1658 states and 5999 transitions. [2022-02-11 01:16:55,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 01:16:55,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2022-02-11 01:16:55,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:55,861 INFO L225 Difference]: With dead ends: 1658 [2022-02-11 01:16:55,861 INFO L226 Difference]: Without dead ends: 1658 [2022-02-11 01:16:55,861 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:16:55,862 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 45 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:55,862 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 40 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:16:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2022-02-11 01:16:55,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1112. [2022-02-11 01:16:55,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.667866786678668) internal successors, (4075), 1111 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:55,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4075 transitions. [2022-02-11 01:16:55,895 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4075 transitions. Word has length 27 [2022-02-11 01:16:55,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:55,895 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 4075 transitions. [2022-02-11 01:16:55,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-02-11 01:16:55,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4075 transitions. [2022-02-11 01:16:55,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:16:55,898 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:55,898 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:55,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:56,114 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,SelfDestructingSolverStorable8 [2022-02-11 01:16:56,115 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:16:56,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:56,116 INFO L85 PathProgramCache]: Analyzing trace with hash -383422002, now seen corresponding path program 1 times [2022-02-11 01:16:56,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:56,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721011715] [2022-02-11 01:16:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:56,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:56,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:56,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721011715] [2022-02-11 01:16:56,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721011715] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:56,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54561607] [2022-02-11 01:16:56,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:56,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:56,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:56,299 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:56,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-11 01:16:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:56,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:16:56,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:56,517 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 [2022-02-11 01:16:56,554 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 14 treesize of output 10 [2022-02-11 01:16:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:56,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:56,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:56,726 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 26 treesize of output 28 [2022-02-11 01:16:56,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:56,854 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 33 [2022-02-11 01:16:56,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:56,861 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 29 treesize of output 31 [2022-02-11 01:16:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:56,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54561607] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:56,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:56,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-11 01:16:56,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297339231] [2022-02-11 01:16:56,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:56,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:16:56,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:56,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:16:56,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:16:56,952 INFO L87 Difference]: Start difference. First operand 1112 states and 4075 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:57,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:57,114 INFO L93 Difference]: Finished difference Result 2387 states and 8904 transitions. [2022-02-11 01:16:57,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 01:16:57,115 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 01:16:57,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:57,149 INFO L225 Difference]: With dead ends: 2387 [2022-02-11 01:16:57,149 INFO L226 Difference]: Without dead ends: 2308 [2022-02-11 01:16:57,149 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:16:57,150 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 80 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:57,150 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 144 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:16:57,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2022-02-11 01:16:57,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1550. [2022-02-11 01:16:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.7140090380890896) internal successors, (5753), 1549 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:57,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5753 transitions. [2022-02-11 01:16:57,195 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5753 transitions. Word has length 29 [2022-02-11 01:16:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:57,195 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 5753 transitions. [2022-02-11 01:16:57,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5753 transitions. [2022-02-11 01:16:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:16:57,200 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:57,201 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:57,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:57,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:57,416 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:16:57,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:57,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1158240516, now seen corresponding path program 2 times [2022-02-11 01:16:57,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:57,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309414574] [2022-02-11 01:16:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:57,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:57,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:57,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309414574] [2022-02-11 01:16:57,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309414574] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:57,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078308836] [2022-02-11 01:16:57,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:16:57,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:57,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:57,537 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:57,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-11 01:16:57,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:16:57,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:57,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:16:57,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:57,721 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 16 treesize of output 12 [2022-02-11 01:16:57,741 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 14 treesize of output 10 [2022-02-11 01:16:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:57,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:57,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:57,896 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 32 treesize of output 34 [2022-02-11 01:16:57,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:57,992 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 33 [2022-02-11 01:16:57,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:57,998 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 29 treesize of output 31 [2022-02-11 01:16:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:58,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078308836] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:58,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:58,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-11 01:16:58,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441693245] [2022-02-11 01:16:58,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:58,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:16:58,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:58,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:16:58,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:16:58,073 INFO L87 Difference]: Start difference. First operand 1550 states and 5753 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:58,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:58,256 INFO L93 Difference]: Finished difference Result 2792 states and 10515 transitions. [2022-02-11 01:16:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 01:16:58,257 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 01:16:58,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:58,268 INFO L225 Difference]: With dead ends: 2792 [2022-02-11 01:16:58,268 INFO L226 Difference]: Without dead ends: 2713 [2022-02-11 01:16:58,268 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:16:58,269 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 90 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:58,269 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 152 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:16:58,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2022-02-11 01:16:58,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 1749. [2022-02-11 01:16:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.7299771167048057) internal successors, (6520), 1748 states have internal predecessors, (6520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:58,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 6520 transitions. [2022-02-11 01:16:58,369 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 6520 transitions. Word has length 29 [2022-02-11 01:16:58,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:58,370 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 6520 transitions. [2022-02-11 01:16:58,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:58,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 6520 transitions. [2022-02-11 01:16:58,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:16:58,376 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:58,376 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:58,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:58,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:58,588 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:16:58,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:58,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1824203434, now seen corresponding path program 3 times [2022-02-11 01:16:58,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:58,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292105817] [2022-02-11 01:16:58,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:58,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:58,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:58,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292105817] [2022-02-11 01:16:58,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292105817] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:58,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333429426] [2022-02-11 01:16:58,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:16:58,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:58,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:58,707 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:58,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-11 01:16:58,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:16:58,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:58,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:16:58,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:58,883 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 16 treesize of output 12 [2022-02-11 01:16:58,920 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 19 treesize of output 15 [2022-02-11 01:16:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:58,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:59,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:59,074 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 32 treesize of output 34 [2022-02-11 01:16:59,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:59,173 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 33 [2022-02-11 01:16:59,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:59,179 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 29 treesize of output 31 [2022-02-11 01:16:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:59,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333429426] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:59,241 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:59,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-11 01:16:59,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233732743] [2022-02-11 01:16:59,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:59,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:16:59,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:59,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:16:59,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:16:59,244 INFO L87 Difference]: Start difference. First operand 1749 states and 6520 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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) [2022-02-11 01:16:59,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:59,403 INFO L93 Difference]: Finished difference Result 2570 states and 9639 transitions. [2022-02-11 01:16:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 01:16:59,404 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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) Word has length 29 [2022-02-11 01:16:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:59,412 INFO L225 Difference]: With dead ends: 2570 [2022-02-11 01:16:59,413 INFO L226 Difference]: Without dead ends: 2491 [2022-02-11 01:16:59,413 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:16:59,413 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 99 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:59,414 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 135 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:16:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2022-02-11 01:16:59,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1887. [2022-02-11 01:16:59,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 3.7338282078472957) internal successors, (7042), 1886 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 7042 transitions. [2022-02-11 01:16:59,462 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 7042 transitions. Word has length 29 [2022-02-11 01:16:59,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:59,463 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 7042 transitions. [2022-02-11 01:16:59,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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) [2022-02-11 01:16:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 7042 transitions. [2022-02-11 01:16:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:16:59,469 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:59,469 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:59,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:59,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-11 01:16:59,684 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:16:59,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:59,684 INFO L85 PathProgramCache]: Analyzing trace with hash -614164824, now seen corresponding path program 4 times [2022-02-11 01:16:59,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:59,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539154994] [2022-02-11 01:16:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:59,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:59,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:59,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539154994] [2022-02-11 01:16:59,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539154994] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:59,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748732122] [2022-02-11 01:16:59,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:16:59,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:59,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:59,821 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:59,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-11 01:16:59,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:16:59,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:59,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:16:59,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:59,989 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 [2022-02-11 01:17:00,008 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 19 treesize of output 15 [2022-02-11 01:17:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:00,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:00,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:00,198 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 30 treesize of output 32 [2022-02-11 01:17:00,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:00,233 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 35 treesize of output 37 [2022-02-11 01:17:00,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:00,243 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-02-11 01:17:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:00,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748732122] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:00,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:00,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-11 01:17:00,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378172684] [2022-02-11 01:17:00,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:00,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:17:00,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:00,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:17:00,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:17:00,366 INFO L87 Difference]: Start difference. First operand 1887 states and 7042 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:00,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:00,587 INFO L93 Difference]: Finished difference Result 3006 states and 11331 transitions. [2022-02-11 01:17:00,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 01:17:00,588 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 01:17:00,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:00,598 INFO L225 Difference]: With dead ends: 3006 [2022-02-11 01:17:00,598 INFO L226 Difference]: Without dead ends: 2927 [2022-02-11 01:17:00,599 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-11 01:17:00,599 INFO L934 BasicCegarLoop]: 36 mSDtfsCounter, 73 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:00,600 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 154 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:17:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2022-02-11 01:17:00,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2081. [2022-02-11 01:17:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 3.751923076923077) internal successors, (7804), 2080 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:00,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 7804 transitions. [2022-02-11 01:17:00,655 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 7804 transitions. Word has length 29 [2022-02-11 01:17:00,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:00,655 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 7804 transitions. [2022-02-11 01:17:00,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:00,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 7804 transitions. [2022-02-11 01:17:00,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:17:00,662 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:00,662 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:00,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:00,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:00,875 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:17:00,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:00,876 INFO L85 PathProgramCache]: Analyzing trace with hash -357509362, now seen corresponding path program 5 times [2022-02-11 01:17:00,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:00,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028790424] [2022-02-11 01:17:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:00,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:00,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:00,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028790424] [2022-02-11 01:17:00,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028790424] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:00,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136486409] [2022-02-11 01:17:00,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:17:00,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:00,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:00,989 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:01,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-11 01:17:01,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:17:01,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:01,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 01:17:01,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:01,139 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 16 treesize of output 12 [2022-02-11 01:17:01,182 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 18 treesize of output 14 [2022-02-11 01:17:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:01,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:01,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:01,344 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 30 treesize of output 32 [2022-02-11 01:17:01,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:01,387 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 36 [2022-02-11 01:17:01,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:01,395 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 32 treesize of output 34 [2022-02-11 01:17:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:01,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136486409] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:01,549 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:01,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-11 01:17:01,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395756750] [2022-02-11 01:17:01,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:01,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:17:01,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:01,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:17:01,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:17:01,552 INFO L87 Difference]: Start difference. First operand 2081 states and 7804 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:01,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:01,781 INFO L93 Difference]: Finished difference Result 2784 states and 10455 transitions. [2022-02-11 01:17:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 01:17:01,781 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 01:17:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:01,790 INFO L225 Difference]: With dead ends: 2784 [2022-02-11 01:17:01,791 INFO L226 Difference]: Without dead ends: 2705 [2022-02-11 01:17:01,791 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-11 01:17:01,791 INFO L934 BasicCegarLoop]: 36 mSDtfsCounter, 79 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:01,792 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 156 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:17:01,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2022-02-11 01:17:01,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 1882. [2022-02-11 01:17:01,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.741095162147794) internal successors, (7037), 1881 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 7037 transitions. [2022-02-11 01:17:01,858 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 7037 transitions. Word has length 29 [2022-02-11 01:17:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:01,858 INFO L470 AbstractCegarLoop]: Abstraction has 1882 states and 7037 transitions. [2022-02-11 01:17:01,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 7037 transitions. [2022-02-11 01:17:01,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:17:01,863 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:01,863 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:01,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:02,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:02,079 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:17:02,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:02,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1162136574, now seen corresponding path program 6 times [2022-02-11 01:17:02,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:02,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664859143] [2022-02-11 01:17:02,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:02,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:02,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:02,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664859143] [2022-02-11 01:17:02,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664859143] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:02,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999652088] [2022-02-11 01:17:02,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:17:02,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:02,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:02,227 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:02,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-11 01:17:02,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 01:17:02,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:02,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 01:17:02,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:02,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-11 01:17:02,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-11 01:17:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:02,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:02,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:02,642 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 26 [2022-02-11 01:17:02,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:02,721 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 35 treesize of output 37 [2022-02-11 01:17:02,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:02,726 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 33 treesize of output 35 [2022-02-11 01:17:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:02,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999652088] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:02,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:02,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-02-11 01:17:02,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594475316] [2022-02-11 01:17:02,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:02,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 01:17:02,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:02,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 01:17:02,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-11 01:17:02,856 INFO L87 Difference]: Start difference. First operand 1882 states and 7037 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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) [2022-02-11 01:17:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:03,061 INFO L93 Difference]: Finished difference Result 2657 states and 9932 transitions. [2022-02-11 01:17:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 01:17:03,061 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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) Word has length 29 [2022-02-11 01:17:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:03,071 INFO L225 Difference]: With dead ends: 2657 [2022-02-11 01:17:03,071 INFO L226 Difference]: Without dead ends: 2578 [2022-02-11 01:17:03,073 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:17:03,075 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 89 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:03,075 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 124 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:17:03,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-02-11 01:17:03,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1926. [2022-02-11 01:17:03,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.7314285714285713) internal successors, (7183), 1925 states have internal predecessors, (7183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:03,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 7183 transitions. [2022-02-11 01:17:03,123 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 7183 transitions. Word has length 29 [2022-02-11 01:17:03,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:03,124 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 7183 transitions. [2022-02-11 01:17:03,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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) [2022-02-11 01:17:03,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 7183 transitions. [2022-02-11 01:17:03,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-11 01:17:03,128 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:03,128 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:03,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:03,347 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,SelfDestructingSolverStorable14 [2022-02-11 01:17:03,347 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:17:03,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:03,348 INFO L85 PathProgramCache]: Analyzing trace with hash 719206604, now seen corresponding path program 7 times [2022-02-11 01:17:03,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:03,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394653017] [2022-02-11 01:17:03,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:03,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:17:03,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:03,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394653017] [2022-02-11 01:17:03,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394653017] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:03,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697555464] [2022-02-11 01:17:03,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:17:03,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:03,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:03,391 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:03,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-11 01:17:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:03,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-11 01:17:03,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:17:03,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:17:03,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697555464] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:03,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:03,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-02-11 01:17:03,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107997851] [2022-02-11 01:17:03,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:03,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 01:17:03,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:03,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 01:17:03,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:17:03,532 INFO L87 Difference]: Start difference. First operand 1926 states and 7183 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:03,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:03,632 INFO L93 Difference]: Finished difference Result 3472 states and 12599 transitions. [2022-02-11 01:17:03,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 01:17:03,633 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-02-11 01:17:03,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:03,673 INFO L225 Difference]: With dead ends: 3472 [2022-02-11 01:17:03,673 INFO L226 Difference]: Without dead ends: 3318 [2022-02-11 01:17:03,673 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-02-11 01:17:03,674 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:03,674 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 67 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:17:03,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2022-02-11 01:17:03,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 2796. [2022-02-11 01:17:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 3.759212880143113) internal successors, (10507), 2795 states have internal predecessors, (10507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:03,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 10507 transitions. [2022-02-11 01:17:03,745 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 10507 transitions. Word has length 31 [2022-02-11 01:17:03,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:03,745 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 10507 transitions. [2022-02-11 01:17:03,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:03,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 10507 transitions. [2022-02-11 01:17:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-11 01:17:03,752 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:03,752 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:03,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:03,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-11 01:17:03,970 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:17:03,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:03,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1293130992, now seen corresponding path program 8 times [2022-02-11 01:17:03,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:03,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970911314] [2022-02-11 01:17:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:03,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:17:03,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:03,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970911314] [2022-02-11 01:17:03,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970911314] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:17:03,993 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:17:03,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 01:17:03,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490424879] [2022-02-11 01:17:03,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:17:03,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 01:17:03,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:03,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 01:17:03,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:17:03,994 INFO L87 Difference]: Start difference. First operand 2796 states and 10507 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:04,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:04,064 INFO L93 Difference]: Finished difference Result 5761 states and 21881 transitions. [2022-02-11 01:17:04,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 01:17:04,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-02-11 01:17:04,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:04,083 INFO L225 Difference]: With dead ends: 5761 [2022-02-11 01:17:04,083 INFO L226 Difference]: Without dead ends: 5510 [2022-02-11 01:17:04,083 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:17:04,085 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 95 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:04,085 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 52 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:17:04,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5510 states. [2022-02-11 01:17:04,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5510 to 4894. [2022-02-11 01:17:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4894 states, 4893 states have (on average 3.8779889638258735) internal successors, (18975), 4893 states have internal predecessors, (18975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4894 states to 4894 states and 18975 transitions. [2022-02-11 01:17:04,201 INFO L78 Accepts]: Start accepts. Automaton has 4894 states and 18975 transitions. Word has length 31 [2022-02-11 01:17:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:04,201 INFO L470 AbstractCegarLoop]: Abstraction has 4894 states and 18975 transitions. [2022-02-11 01:17:04,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 4894 states and 18975 transitions. [2022-02-11 01:17:04,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-11 01:17:04,214 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:04,214 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:04,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-11 01:17:04,215 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:17:04,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:04,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1002043648, now seen corresponding path program 9 times [2022-02-11 01:17:04,215 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:04,215 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454712061] [2022-02-11 01:17:04,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:04,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:17:04,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:04,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454712061] [2022-02-11 01:17:04,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454712061] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:04,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872534386] [2022-02-11 01:17:04,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:17:04,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:04,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:04,244 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:04,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-11 01:17:04,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:17:04,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:04,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:17:04,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:17:04,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:17:04,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872534386] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:04,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:04,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-02-11 01:17:04,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974026087] [2022-02-11 01:17:04,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:04,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:17:04,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:04,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:17:04,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:17:04,493 INFO L87 Difference]: Start difference. First operand 4894 states and 18975 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:04,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:04,903 INFO L93 Difference]: Finished difference Result 17927 states and 66398 transitions. [2022-02-11 01:17:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 01:17:04,911 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-11 01:17:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:04,966 INFO L225 Difference]: With dead ends: 17927 [2022-02-11 01:17:04,967 INFO L226 Difference]: Without dead ends: 15301 [2022-02-11 01:17:04,967 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-02-11 01:17:04,968 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 168 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:04,968 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 126 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:17:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15301 states. [2022-02-11 01:17:05,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15301 to 8354. [2022-02-11 01:17:05,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8354 states, 8353 states have (on average 3.950676403687298) internal successors, (33000), 8353 states have internal predecessors, (33000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:05,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8354 states to 8354 states and 33000 transitions. [2022-02-11 01:17:05,360 INFO L78 Accepts]: Start accepts. Automaton has 8354 states and 33000 transitions. Word has length 34 [2022-02-11 01:17:05,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:05,360 INFO L470 AbstractCegarLoop]: Abstraction has 8354 states and 33000 transitions. [2022-02-11 01:17:05,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:05,361 INFO L276 IsEmpty]: Start isEmpty. Operand 8354 states and 33000 transitions. [2022-02-11 01:17:05,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-11 01:17:05,383 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:05,383 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:05,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:05,603 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,SelfDestructingSolverStorable17 [2022-02-11 01:17:05,603 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:17:05,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:05,604 INFO L85 PathProgramCache]: Analyzing trace with hash -129967119, now seen corresponding path program 10 times [2022-02-11 01:17:05,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:05,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640481210] [2022-02-11 01:17:05,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:05,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:17:05,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:05,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640481210] [2022-02-11 01:17:05,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640481210] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:05,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347548053] [2022-02-11 01:17:05,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:17:05,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:05,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:05,696 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:05,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-11 01:17:05,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:17:05,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:05,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:17:05,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:17:05,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:17:05,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347548053] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:05,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:05,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-02-11 01:17:05,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191941447] [2022-02-11 01:17:05,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:05,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:17:05,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:05,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:17:05,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:17:05,919 INFO L87 Difference]: Start difference. First operand 8354 states and 33000 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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) [2022-02-11 01:17:06,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:06,413 INFO L93 Difference]: Finished difference Result 21371 states and 81454 transitions. [2022-02-11 01:17:06,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 01:17:06,414 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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) Word has length 34 [2022-02-11 01:17:06,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:06,527 INFO L225 Difference]: With dead ends: 21371 [2022-02-11 01:17:06,528 INFO L226 Difference]: Without dead ends: 20932 [2022-02-11 01:17:06,528 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:17:06,528 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 331 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:06,529 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 81 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:17:06,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20932 states. [2022-02-11 01:17:06,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20932 to 12631. [2022-02-11 01:17:07,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12631 states, 12630 states have (on average 4.037925574030087) internal successors, (50999), 12630 states have internal predecessors, (50999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:07,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12631 states to 12631 states and 50999 transitions. [2022-02-11 01:17:07,130 INFO L78 Accepts]: Start accepts. Automaton has 12631 states and 50999 transitions. Word has length 34 [2022-02-11 01:17:07,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:07,130 INFO L470 AbstractCegarLoop]: Abstraction has 12631 states and 50999 transitions. [2022-02-11 01:17:07,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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) [2022-02-11 01:17:07,130 INFO L276 IsEmpty]: Start isEmpty. Operand 12631 states and 50999 transitions. [2022-02-11 01:17:07,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-11 01:17:07,165 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:07,165 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:07,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:07,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:07,379 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:17:07,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:07,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1761367056, now seen corresponding path program 11 times [2022-02-11 01:17:07,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:07,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407849271] [2022-02-11 01:17:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:07,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:17:07,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:07,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407849271] [2022-02-11 01:17:07,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407849271] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:07,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276613800] [2022-02-11 01:17:07,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:17:07,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:07,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:07,416 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:07,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-11 01:17:07,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:17:07,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:07,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:17:07,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:17:07,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:17:07,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276613800] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:07,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:07,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-02-11 01:17:07,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319842562] [2022-02-11 01:17:07,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:07,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 01:17:07,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:07,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 01:17:07,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:17:07,615 INFO L87 Difference]: Start difference. First operand 12631 states and 50999 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:08,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:08,045 INFO L93 Difference]: Finished difference Result 20596 states and 79596 transitions. [2022-02-11 01:17:08,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 01:17:08,045 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-11 01:17:08,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:08,106 INFO L225 Difference]: With dead ends: 20596 [2022-02-11 01:17:08,106 INFO L226 Difference]: Without dead ends: 20518 [2022-02-11 01:17:08,106 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:17:08,107 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 169 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:08,108 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 67 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:17:08,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20518 states. [2022-02-11 01:17:08,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20518 to 12577. [2022-02-11 01:17:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12577 states, 12576 states have (on average 4.042064249363868) internal successors, (50833), 12576 states have internal predecessors, (50833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12577 states to 12577 states and 50833 transitions. [2022-02-11 01:17:08,686 INFO L78 Accepts]: Start accepts. Automaton has 12577 states and 50833 transitions. Word has length 34 [2022-02-11 01:17:08,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:08,686 INFO L470 AbstractCegarLoop]: Abstraction has 12577 states and 50833 transitions. [2022-02-11 01:17:08,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:08,687 INFO L276 IsEmpty]: Start isEmpty. Operand 12577 states and 50833 transitions. [2022-02-11 01:17:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-11 01:17:08,722 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:08,722 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:08,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:08,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:08,935 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:17:08,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:08,936 INFO L85 PathProgramCache]: Analyzing trace with hash -447820591, now seen corresponding path program 12 times [2022-02-11 01:17:08,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:08,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126758209] [2022-02-11 01:17:08,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:08,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:17:08,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:08,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126758209] [2022-02-11 01:17:08,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126758209] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:08,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243244225] [2022-02-11 01:17:08,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:17:08,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:08,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:08,972 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:08,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-11 01:17:09,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:17:09,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:09,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:17:09,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:17:09,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:17:09,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243244225] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:09,206 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:09,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-02-11 01:17:09,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471158462] [2022-02-11 01:17:09,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:09,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 01:17:09,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:09,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 01:17:09,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:17:09,207 INFO L87 Difference]: Start difference. First operand 12577 states and 50833 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:09,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:09,639 INFO L93 Difference]: Finished difference Result 22733 states and 87606 transitions. [2022-02-11 01:17:09,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 01:17:09,639 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-11 01:17:09,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:09,699 INFO L225 Difference]: With dead ends: 22733 [2022-02-11 01:17:09,700 INFO L226 Difference]: Without dead ends: 21028 [2022-02-11 01:17:09,700 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:17:09,700 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 243 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:09,701 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 88 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:17:09,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21028 states. [2022-02-11 01:17:10,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21028 to 15386. [2022-02-11 01:17:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15386 states, 15385 states have (on average 4.0534936626584335) internal successors, (62363), 15385 states have internal predecessors, (62363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:10,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15386 states to 15386 states and 62363 transitions. [2022-02-11 01:17:10,327 INFO L78 Accepts]: Start accepts. Automaton has 15386 states and 62363 transitions. Word has length 34 [2022-02-11 01:17:10,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:10,327 INFO L470 AbstractCegarLoop]: Abstraction has 15386 states and 62363 transitions. [2022-02-11 01:17:10,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:10,327 INFO L276 IsEmpty]: Start isEmpty. Operand 15386 states and 62363 transitions. [2022-02-11 01:17:10,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-11 01:17:10,359 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:10,359 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:10,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:10,560 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,SelfDestructingSolverStorable20 [2022-02-11 01:17:10,561 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:17:10,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:10,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1932805376, now seen corresponding path program 13 times [2022-02-11 01:17:10,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:10,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219186096] [2022-02-11 01:17:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:10,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:17:10,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:10,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219186096] [2022-02-11 01:17:10,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219186096] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:10,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914150510] [2022-02-11 01:17:10,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:17:10,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:10,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:10,596 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:10,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-11 01:17:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:10,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:17:10,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:17:10,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:17:10,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914150510] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:10,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:10,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-02-11 01:17:10,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843752337] [2022-02-11 01:17:10,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:10,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:17:10,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:10,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:17:10,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:17:10,788 INFO L87 Difference]: Start difference. First operand 15386 states and 62363 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:11,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:11,348 INFO L93 Difference]: Finished difference Result 31402 states and 124083 transitions. [2022-02-11 01:17:11,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 01:17:11,348 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-11 01:17:11,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:11,448 INFO L225 Difference]: With dead ends: 31402 [2022-02-11 01:17:11,448 INFO L226 Difference]: Without dead ends: 31094 [2022-02-11 01:17:11,448 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:17:11,449 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 349 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:11,449 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 79 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:17:11,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31094 states. [2022-02-11 01:17:12,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31094 to 19812. [2022-02-11 01:17:12,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19812 states, 19811 states have (on average 4.119024784210792) internal successors, (81602), 19811 states have internal predecessors, (81602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19812 states to 19812 states and 81602 transitions. [2022-02-11 01:17:12,121 INFO L78 Accepts]: Start accepts. Automaton has 19812 states and 81602 transitions. Word has length 34 [2022-02-11 01:17:12,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:12,121 INFO L470 AbstractCegarLoop]: Abstraction has 19812 states and 81602 transitions. [2022-02-11 01:17:12,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand 19812 states and 81602 transitions. [2022-02-11 01:17:12,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-11 01:17:12,164 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:12,164 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:12,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:12,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:12,373 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:17:12,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:12,373 INFO L85 PathProgramCache]: Analyzing trace with hash 19813248, now seen corresponding path program 14 times [2022-02-11 01:17:12,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:12,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759498069] [2022-02-11 01:17:12,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:12,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:17:12,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:12,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759498069] [2022-02-11 01:17:12,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759498069] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:12,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061280817] [2022-02-11 01:17:12,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:17:12,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:12,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:12,406 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:12,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-11 01:17:12,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:17:12,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:12,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:17:12,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:17:12,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:17:12,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061280817] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:12,651 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:12,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-02-11 01:17:12,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046210680] [2022-02-11 01:17:12,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:12,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 01:17:12,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:12,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 01:17:12,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:17:12,652 INFO L87 Difference]: Start difference. First operand 19812 states and 81602 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:13,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:13,224 INFO L93 Difference]: Finished difference Result 33709 states and 133959 transitions. [2022-02-11 01:17:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 01:17:13,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-11 01:17:13,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:13,492 INFO L225 Difference]: With dead ends: 33709 [2022-02-11 01:17:13,492 INFO L226 Difference]: Without dead ends: 32656 [2022-02-11 01:17:13,492 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:17:13,493 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 170 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:13,493 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 112 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:17:13,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32656 states. [2022-02-11 01:17:14,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32656 to 23355. [2022-02-11 01:17:14,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23355 states, 23354 states have (on average 4.114370129314036) internal successors, (96087), 23354 states have internal predecessors, (96087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23355 states to 23355 states and 96087 transitions. [2022-02-11 01:17:14,301 INFO L78 Accepts]: Start accepts. Automaton has 23355 states and 96087 transitions. Word has length 34 [2022-02-11 01:17:14,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:14,302 INFO L470 AbstractCegarLoop]: Abstraction has 23355 states and 96087 transitions. [2022-02-11 01:17:14,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:14,302 INFO L276 IsEmpty]: Start isEmpty. Operand 23355 states and 96087 transitions. [2022-02-11 01:17:14,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-11 01:17:14,370 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:14,370 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:14,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-02-11 01:17:14,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:14,584 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:17:14,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:14,584 INFO L85 PathProgramCache]: Analyzing trace with hash -650007193, now seen corresponding path program 15 times [2022-02-11 01:17:14,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:14,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214866638] [2022-02-11 01:17:14,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:14,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:14,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:17:14,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:14,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214866638] [2022-02-11 01:17:14,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214866638] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:14,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455174208] [2022-02-11 01:17:14,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:17:14,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:14,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:14,626 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:14,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-11 01:17:14,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:17:14,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:14,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:17:14,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:17:14,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:17:14,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455174208] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:14,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:14,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-02-11 01:17:14,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122167145] [2022-02-11 01:17:14,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:14,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 01:17:14,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:14,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 01:17:14,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:17:14,831 INFO L87 Difference]: Start difference. First operand 23355 states and 96087 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:15,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:15,407 INFO L93 Difference]: Finished difference Result 31214 states and 125510 transitions. [2022-02-11 01:17:15,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 01:17:15,408 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-11 01:17:15,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:15,503 INFO L225 Difference]: With dead ends: 31214 [2022-02-11 01:17:15,504 INFO L226 Difference]: Without dead ends: 31106 [2022-02-11 01:17:15,504 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:17:15,504 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 149 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:15,504 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 81 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:17:15,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31106 states. [2022-02-11 01:17:16,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31106 to 24543. [2022-02-11 01:17:16,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24543 states, 24542 states have (on average 4.135033819574606) internal successors, (101482), 24542 states have internal predecessors, (101482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:16,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24543 states to 24543 states and 101482 transitions. [2022-02-11 01:17:16,256 INFO L78 Accepts]: Start accepts. Automaton has 24543 states and 101482 transitions. Word has length 34 [2022-02-11 01:17:16,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:16,256 INFO L470 AbstractCegarLoop]: Abstraction has 24543 states and 101482 transitions. [2022-02-11 01:17:16,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:16,256 INFO L276 IsEmpty]: Start isEmpty. Operand 24543 states and 101482 transitions. [2022-02-11 01:17:16,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-11 01:17:16,305 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:16,305 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:16,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:16,505 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,SelfDestructingSolverStorable23 [2022-02-11 01:17:16,505 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:17:16,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:16,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2144646697, now seen corresponding path program 16 times [2022-02-11 01:17:16,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:16,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900653789] [2022-02-11 01:17:16,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:16,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-11 01:17:16,551 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:16,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900653789] [2022-02-11 01:17:16,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900653789] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:16,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666447569] [2022-02-11 01:17:16,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:17:16,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:16,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:16,552 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:16,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-11 01:17:16,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:17:16,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:16,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:17:16,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-11 01:17:16,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-11 01:17:16,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666447569] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:17:16,640 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-11 01:17:16,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-02-11 01:17:16,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582310230] [2022-02-11 01:17:16,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:17:16,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:17:16,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:16,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:17:16,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:17:16,641 INFO L87 Difference]: Start difference. First operand 24543 states and 101482 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:17,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:17,041 INFO L93 Difference]: Finished difference Result 29524 states and 121533 transitions. [2022-02-11 01:17:17,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 01:17:17,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-11 01:17:17,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:17,160 INFO L225 Difference]: With dead ends: 29524 [2022-02-11 01:17:17,160 INFO L226 Difference]: Without dead ends: 29524 [2022-02-11 01:17:17,161 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:17:17,161 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:17,161 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:17:17,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29524 states. [2022-02-11 01:17:17,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29524 to 22120. [2022-02-11 01:17:17,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22120 states, 22119 states have (on average 4.096252090962521) internal successors, (90605), 22119 states have internal predecessors, (90605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:17,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22120 states to 22120 states and 90605 transitions. [2022-02-11 01:17:17,961 INFO L78 Accepts]: Start accepts. Automaton has 22120 states and 90605 transitions. Word has length 37 [2022-02-11 01:17:17,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:17,961 INFO L470 AbstractCegarLoop]: Abstraction has 22120 states and 90605 transitions. [2022-02-11 01:17:17,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:17,961 INFO L276 IsEmpty]: Start isEmpty. Operand 22120 states and 90605 transitions. [2022-02-11 01:17:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-11 01:17:18,008 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:18,008 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:18,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:18,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:18,208 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:17:18,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:18,209 INFO L85 PathProgramCache]: Analyzing trace with hash -461619199, now seen corresponding path program 17 times [2022-02-11 01:17:18,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:18,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246761823] [2022-02-11 01:17:18,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:18,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-11 01:17:18,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:18,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246761823] [2022-02-11 01:17:18,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246761823] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:18,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673708405] [2022-02-11 01:17:18,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:17:18,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:18,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:18,243 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:18,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-11 01:17:18,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:17:18,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:18,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:17:18,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-11 01:17:18,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-11 01:17:18,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673708405] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:17:18,335 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-11 01:17:18,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-02-11 01:17:18,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533438308] [2022-02-11 01:17:18,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:17:18,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 01:17:18,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:18,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 01:17:18,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:17:18,336 INFO L87 Difference]: Start difference. First operand 22120 states and 90605 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:18,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:18,528 INFO L93 Difference]: Finished difference Result 30000 states and 123549 transitions. [2022-02-11 01:17:18,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 01:17:18,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-11 01:17:18,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:18,815 INFO L225 Difference]: With dead ends: 30000 [2022-02-11 01:17:18,815 INFO L226 Difference]: Without dead ends: 30000 [2022-02-11 01:17:18,815 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:17:18,819 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:18,819 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 68 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:17:18,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30000 states. [2022-02-11 01:17:19,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30000 to 24376. [2022-02-11 01:17:19,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24376 states, 24375 states have (on average 4.091979487179487) internal successors, (99742), 24375 states have internal predecessors, (99742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24376 states to 24376 states and 99742 transitions. [2022-02-11 01:17:19,444 INFO L78 Accepts]: Start accepts. Automaton has 24376 states and 99742 transitions. Word has length 37 [2022-02-11 01:17:19,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:19,444 INFO L470 AbstractCegarLoop]: Abstraction has 24376 states and 99742 transitions. [2022-02-11 01:17:19,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:19,445 INFO L276 IsEmpty]: Start isEmpty. Operand 24376 states and 99742 transitions. [2022-02-11 01:17:19,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-11 01:17:19,496 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:19,496 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:19,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:19,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:19,697 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:17:19,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:19,697 INFO L85 PathProgramCache]: Analyzing trace with hash -857424067, now seen corresponding path program 18 times [2022-02-11 01:17:19,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:19,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029890434] [2022-02-11 01:17:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:19,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-11 01:17:19,723 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:19,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029890434] [2022-02-11 01:17:19,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029890434] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:19,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521226149] [2022-02-11 01:17:19,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:17:19,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:19,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:19,725 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:19,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-11 01:17:19,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:17:19,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:19,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:17:19,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-11 01:17:19,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-11 01:17:19,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521226149] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:19,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:19,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-02-11 01:17:19,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911869558] [2022-02-11 01:17:19,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:19,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:17:19,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:19,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:17:19,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:17:19,863 INFO L87 Difference]: Start difference. First operand 24376 states and 99742 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:20,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:20,416 INFO L93 Difference]: Finished difference Result 37294 states and 154370 transitions. [2022-02-11 01:17:20,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 01:17:20,416 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-11 01:17:20,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:20,548 INFO L225 Difference]: With dead ends: 37294 [2022-02-11 01:17:20,548 INFO L226 Difference]: Without dead ends: 37294 [2022-02-11 01:17:20,548 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:17:20,548 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 72 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:20,549 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 81 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:17:20,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37294 states. [2022-02-11 01:17:21,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37294 to 34517. [2022-02-11 01:17:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34517 states, 34516 states have (on average 4.136226677482907) internal successors, (142766), 34516 states have internal predecessors, (142766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34517 states to 34517 states and 142766 transitions. [2022-02-11 01:17:21,570 INFO L78 Accepts]: Start accepts. Automaton has 34517 states and 142766 transitions. Word has length 37 [2022-02-11 01:17:21,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:21,570 INFO L470 AbstractCegarLoop]: Abstraction has 34517 states and 142766 transitions. [2022-02-11 01:17:21,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:21,570 INFO L276 IsEmpty]: Start isEmpty. Operand 34517 states and 142766 transitions. [2022-02-11 01:17:21,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 01:17:21,644 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:21,644 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:21,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-02-11 01:17:21,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:21,844 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:17:21,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:21,845 INFO L85 PathProgramCache]: Analyzing trace with hash -709164033, now seen corresponding path program 19 times [2022-02-11 01:17:21,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:21,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473261962] [2022-02-11 01:17:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:21,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:22,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:22,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473261962] [2022-02-11 01:17:22,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473261962] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:22,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260456136] [2022-02-11 01:17:22,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:17:22,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:22,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:22,546 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:22,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-11 01:17:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:22,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-11 01:17:22,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:22,874 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:17:22,874 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 30 treesize of output 18 [2022-02-11 01:17:23,063 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 37 treesize of output 29 [2022-02-11 01:17:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:23,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:23,321 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:17:23,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 60 [2022-02-11 01:17:23,646 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:17:23,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 69 [2022-02-11 01:17:23,676 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:17:23,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 85 [2022-02-11 01:17:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:24,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260456136] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:24,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:24,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-02-11 01:17:24,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868077354] [2022-02-11 01:17:24,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:24,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 01:17:24,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:24,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 01:17:24,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:17:24,157 INFO L87 Difference]: Start difference. First operand 34517 states and 142766 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:26,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:26,817 INFO L93 Difference]: Finished difference Result 67293 states and 275148 transitions. [2022-02-11 01:17:26,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 01:17:26,818 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 01:17:26,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:27,109 INFO L225 Difference]: With dead ends: 67293 [2022-02-11 01:17:27,109 INFO L226 Difference]: Without dead ends: 67101 [2022-02-11 01:17:27,110 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=334, Invalid=2318, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 01:17:27,110 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 579 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 2877 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 2953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:27,110 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 472 Invalid, 2953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2877 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-11 01:17:27,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67101 states. [2022-02-11 01:17:28,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67101 to 34913. [2022-02-11 01:17:28,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34913 states, 34912 states have (on average 4.134910632447296) internal successors, (144358), 34912 states have internal predecessors, (144358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34913 states to 34913 states and 144358 transitions. [2022-02-11 01:17:28,428 INFO L78 Accepts]: Start accepts. Automaton has 34913 states and 144358 transitions. Word has length 39 [2022-02-11 01:17:28,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:28,428 INFO L470 AbstractCegarLoop]: Abstraction has 34913 states and 144358 transitions. [2022-02-11 01:17:28,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:28,429 INFO L276 IsEmpty]: Start isEmpty. Operand 34913 states and 144358 transitions. [2022-02-11 01:17:28,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 01:17:28,516 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:28,516 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:28,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:28,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-11 01:17:28,717 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:17:28,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:28,717 INFO L85 PathProgramCache]: Analyzing trace with hash -943081597, now seen corresponding path program 20 times [2022-02-11 01:17:28,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:28,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365608043] [2022-02-11 01:17:28,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:28,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:29,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:29,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365608043] [2022-02-11 01:17:29,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365608043] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:29,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238967133] [2022-02-11 01:17:29,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:17:29,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:29,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:29,380 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:29,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-11 01:17:29,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:17:29,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:29,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-11 01:17:29,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:29,737 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:17:29,737 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 16 [2022-02-11 01:17:29,933 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 33 treesize of output 25 [2022-02-11 01:17:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:30,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:30,188 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:17:30,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 60 [2022-02-11 01:17:30,532 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:17:30,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 69 [2022-02-11 01:17:30,560 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:17:30,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 85 [2022-02-11 01:17:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:31,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238967133] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:31,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:31,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-02-11 01:17:31,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905513610] [2022-02-11 01:17:31,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:31,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 01:17:31,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:31,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 01:17:31,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:17:31,098 INFO L87 Difference]: Start difference. First operand 34913 states and 144358 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:34,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:34,158 INFO L93 Difference]: Finished difference Result 73959 states and 303171 transitions. [2022-02-11 01:17:34,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 01:17:34,158 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 01:17:34,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:34,457 INFO L225 Difference]: With dead ends: 73959 [2022-02-11 01:17:34,457 INFO L226 Difference]: Without dead ends: 73743 [2022-02-11 01:17:34,458 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=435, Invalid=2987, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 01:17:34,459 INFO L934 BasicCegarLoop]: 48 mSDtfsCounter, 629 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 3594 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 3688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:34,459 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 691 Invalid, 3688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3594 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-11 01:17:34,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73743 states. [2022-02-11 01:17:35,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73743 to 35063. [2022-02-11 01:17:35,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35063 states, 35062 states have (on average 4.133534881067822) internal successors, (144930), 35062 states have internal predecessors, (144930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35063 states to 35063 states and 144930 transitions. [2022-02-11 01:17:36,155 INFO L78 Accepts]: Start accepts. Automaton has 35063 states and 144930 transitions. Word has length 39 [2022-02-11 01:17:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:36,155 INFO L470 AbstractCegarLoop]: Abstraction has 35063 states and 144930 transitions. [2022-02-11 01:17:36,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:36,156 INFO L276 IsEmpty]: Start isEmpty. Operand 35063 states and 144930 transitions. [2022-02-11 01:17:36,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 01:17:36,254 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:36,254 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:36,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-02-11 01:17:36,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-11 01:17:36,455 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:17:36,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:36,455 INFO L85 PathProgramCache]: Analyzing trace with hash 868774019, now seen corresponding path program 21 times [2022-02-11 01:17:36,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:36,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502363167] [2022-02-11 01:17:36,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:36,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:36,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:36,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502363167] [2022-02-11 01:17:36,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502363167] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:36,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975540082] [2022-02-11 01:17:36,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:17:36,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:36,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:36,836 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:36,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-11 01:17:36,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:17:36,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:36,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2022-02-11 01:17:36,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:37,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:37,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:37,206 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 36 [2022-02-11 01:17:37,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:37,477 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 28 treesize of output 36 [2022-02-11 01:17:37,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:37,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:37,580 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 41 treesize of output 47 [2022-02-11 01:17:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:37,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:38,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:38,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:38,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:38,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:38,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 47 [2022-02-11 01:17:43,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:43,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:43,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:43,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:43,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 102 [2022-02-11 01:17:43,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:43,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:43,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:43,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 110 treesize of output 112 [2022-02-11 01:17:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:45,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975540082] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:45,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:45,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 45 [2022-02-11 01:17:45,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22462278] [2022-02-11 01:17:45,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:45,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-11 01:17:45,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:45,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-11 01:17:45,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 01:17:45,089 INFO L87 Difference]: Start difference. First operand 35063 states and 144930 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:19:07,063 INFO L93 Difference]: Finished difference Result 85082 states and 341640 transitions. [2022-02-11 01:19:07,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-02-11 01:19:07,064 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 01:19:07,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:19:07,435 INFO L225 Difference]: With dead ends: 85082 [2022-02-11 01:19:07,435 INFO L226 Difference]: Without dead ends: 85008 [2022-02-11 01:19:07,445 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 67 SyntacticMatches, 32 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18768 ImplicationChecksByTransitivity, 80.1s TimeCoverageRelationStatistics Valid=5360, Invalid=36031, Unknown=21, NotChecked=0, Total=41412 [2022-02-11 01:19:07,446 INFO L934 BasicCegarLoop]: 43 mSDtfsCounter, 1446 mSDsluCounter, 4876 mSDsCounter, 0 mSdLazyCounter, 2765 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1446 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 15427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12405 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:19:07,446 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1446 Valid, 1280 Invalid, 15427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2765 Invalid, 0 Unknown, 12405 Unchecked, 1.6s Time] [2022-02-11 01:19:07,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85008 states. [2022-02-11 01:19:08,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85008 to 36789. [2022-02-11 01:19:08,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36789 states, 36788 states have (on average 4.1157442644340545) internal successors, (151410), 36788 states have internal predecessors, (151410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:08,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36789 states to 36789 states and 151410 transitions. [2022-02-11 01:19:08,934 INFO L78 Accepts]: Start accepts. Automaton has 36789 states and 151410 transitions. Word has length 39 [2022-02-11 01:19:08,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:19:08,934 INFO L470 AbstractCegarLoop]: Abstraction has 36789 states and 151410 transitions. [2022-02-11 01:19:08,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:08,934 INFO L276 IsEmpty]: Start isEmpty. Operand 36789 states and 151410 transitions. [2022-02-11 01:19:09,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 01:19:09,022 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:19:09,022 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:19:09,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-02-11 01:19:09,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:09,223 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:19:09,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:19:09,223 INFO L85 PathProgramCache]: Analyzing trace with hash -813062891, now seen corresponding path program 22 times [2022-02-11 01:19:09,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:19:09,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822440082] [2022-02-11 01:19:09,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:19:09,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:19:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:19:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:09,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:19:09,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822440082] [2022-02-11 01:19:09,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822440082] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:19:09,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706780984] [2022-02-11 01:19:09,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:19:09,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:09,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:19:09,667 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:19:09,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-11 01:19:09,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:19:09,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:19:09,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-11 01:19:09,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:19:09,996 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:19:09,997 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 30 treesize of output 18 [2022-02-11 01:19:10,148 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 30 treesize of output 22 [2022-02-11 01:19:10,201 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 11 treesize of output 7 [2022-02-11 01:19:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:10,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:19:10,475 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:19:10,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 60 [2022-02-11 01:19:10,827 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:19:10,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 69 [2022-02-11 01:19:10,856 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:19:10,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 85 [2022-02-11 01:19:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:11,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706780984] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:19:11,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:19:11,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 33 [2022-02-11 01:19:11,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276584731] [2022-02-11 01:19:11,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:19:11,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 01:19:11,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:19:11,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 01:19:11,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 01:19:11,267 INFO L87 Difference]: Start difference. First operand 36789 states and 151410 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:14,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:19:14,477 INFO L93 Difference]: Finished difference Result 83699 states and 340717 transitions. [2022-02-11 01:19:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 01:19:14,478 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 01:19:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:19:14,803 INFO L225 Difference]: With dead ends: 83699 [2022-02-11 01:19:14,803 INFO L226 Difference]: Without dead ends: 83644 [2022-02-11 01:19:14,804 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=376, Invalid=2486, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 01:19:14,804 INFO L934 BasicCegarLoop]: 38 mSDtfsCounter, 537 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 2904 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 2995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:19:14,804 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 511 Invalid, 2995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2904 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-11 01:19:14,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83644 states. [2022-02-11 01:19:16,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83644 to 36511. [2022-02-11 01:19:16,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36511 states, 36510 states have (on average 4.134155026020268) internal successors, (150938), 36510 states have internal predecessors, (150938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36511 states to 36511 states and 150938 transitions. [2022-02-11 01:19:16,923 INFO L78 Accepts]: Start accepts. Automaton has 36511 states and 150938 transitions. Word has length 39 [2022-02-11 01:19:16,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:19:16,924 INFO L470 AbstractCegarLoop]: Abstraction has 36511 states and 150938 transitions. [2022-02-11 01:19:16,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:16,924 INFO L276 IsEmpty]: Start isEmpty. Operand 36511 states and 150938 transitions. [2022-02-11 01:19:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 01:19:17,006 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:19:17,006 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:19:17,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-11 01:19:17,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:17,207 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:19:17,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:19:17,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1038211985, now seen corresponding path program 23 times [2022-02-11 01:19:17,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:19:17,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695673244] [2022-02-11 01:19:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:19:17,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:19:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:19:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:17,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:19:17,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695673244] [2022-02-11 01:19:17,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695673244] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:19:17,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431255437] [2022-02-11 01:19:17,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:19:17,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:17,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:19:17,616 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:19:17,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-11 01:19:17,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:19:17,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:19:17,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-11 01:19:17,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:19:17,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:17,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:17,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:17,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:17,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2022-02-11 01:19:18,169 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 34 treesize of output 26 [2022-02-11 01:19:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:18,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:19:18,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:18,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:18,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:18,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:18,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 37 [2022-02-11 01:19:19,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:19,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:19,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:19,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:19,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2022-02-11 01:19:19,362 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:19:19,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 20 treesize of output 45 [2022-02-11 01:19:19,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:19,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:19,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:19,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2022-02-11 01:19:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:19,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431255437] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:19:19,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:19:19,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 40 [2022-02-11 01:19:19,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220375617] [2022-02-11 01:19:19,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:19:19,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-11 01:19:19,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:19:19,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-11 01:19:19,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 01:19:19,475 INFO L87 Difference]: Start difference. First operand 36511 states and 150938 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:33,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:19:33,598 INFO L93 Difference]: Finished difference Result 112883 states and 456658 transitions. [2022-02-11 01:19:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-02-11 01:19:33,598 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 01:19:33,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:19:34,379 INFO L225 Difference]: With dead ends: 112883 [2022-02-11 01:19:34,379 INFO L226 Difference]: Without dead ends: 112572 [2022-02-11 01:19:34,382 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12601 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=4044, Invalid=31488, Unknown=0, NotChecked=0, Total=35532 [2022-02-11 01:19:34,382 INFO L934 BasicCegarLoop]: 64 mSDtfsCounter, 1807 mSDsluCounter, 2863 mSDsCounter, 0 mSdLazyCounter, 4215 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 6914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 4215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2280 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:19:34,382 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1807 Valid, 1286 Invalid, 6914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 4215 Invalid, 0 Unknown, 2280 Unchecked, 2.4s Time] [2022-02-11 01:19:34,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112572 states. [2022-02-11 01:19:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112572 to 36899. [2022-02-11 01:19:36,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36899 states, 36898 states have (on average 4.128326738576616) internal successors, (152327), 36898 states have internal predecessors, (152327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36899 states to 36899 states and 152327 transitions. [2022-02-11 01:19:36,479 INFO L78 Accepts]: Start accepts. Automaton has 36899 states and 152327 transitions. Word has length 39 [2022-02-11 01:19:36,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:19:36,479 INFO L470 AbstractCegarLoop]: Abstraction has 36899 states and 152327 transitions. [2022-02-11 01:19:36,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:36,479 INFO L276 IsEmpty]: Start isEmpty. Operand 36899 states and 152327 transitions. [2022-02-11 01:19:36,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 01:19:36,563 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:19:36,563 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:19:36,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-11 01:19:36,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:36,764 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:19:36,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:19:36,764 INFO L85 PathProgramCache]: Analyzing trace with hash 804294421, now seen corresponding path program 24 times [2022-02-11 01:19:36,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:19:36,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317942287] [2022-02-11 01:19:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:19:36,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:19:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:19:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:37,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:19:37,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317942287] [2022-02-11 01:19:37,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317942287] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:19:37,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390902515] [2022-02-11 01:19:37,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:19:37,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:37,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:19:37,255 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:19:37,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-11 01:19:37,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 01:19:37,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:19:37,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2022-02-11 01:19:37,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:19:37,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:37,590 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 26 treesize of output 44 [2022-02-11 01:19:37,805 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 37 treesize of output 29 [2022-02-11 01:19:37,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:37,841 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 01:19:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:37,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:19:38,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:38,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:38,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:38,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 73 [2022-02-11 01:19:39,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:39,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:39,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 72 [2022-02-11 01:19:39,264 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:19:39,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 82 [2022-02-11 01:19:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:39,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390902515] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:19:39,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:19:39,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 38 [2022-02-11 01:19:39,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282284452] [2022-02-11 01:19:39,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:19:39,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-11 01:19:39,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:19:39,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-11 01:19:39,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 01:19:39,723 INFO L87 Difference]: Start difference. First operand 36899 states and 152327 transitions. Second operand has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:43,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:19:43,731 INFO L93 Difference]: Finished difference Result 68964 states and 278866 transitions. [2022-02-11 01:19:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-11 01:19:43,732 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 01:19:43,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:19:44,032 INFO L225 Difference]: With dead ends: 68964 [2022-02-11 01:19:44,033 INFO L226 Difference]: Without dead ends: 68817 [2022-02-11 01:19:44,033 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2408 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1099, Invalid=6557, Unknown=0, NotChecked=0, Total=7656 [2022-02-11 01:19:44,034 INFO L934 BasicCegarLoop]: 44 mSDtfsCounter, 647 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 3794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1533 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:19:44,034 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 821 Invalid, 3794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2165 Invalid, 0 Unknown, 1533 Unchecked, 1.2s Time] [2022-02-11 01:19:44,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68817 states. [2022-02-11 01:19:45,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68817 to 37697. [2022-02-11 01:19:45,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37697 states, 37696 states have (on average 4.120331069609508) internal successors, (155320), 37696 states have internal predecessors, (155320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:45,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37697 states to 37697 states and 155320 transitions. [2022-02-11 01:19:45,762 INFO L78 Accepts]: Start accepts. Automaton has 37697 states and 155320 transitions. Word has length 39 [2022-02-11 01:19:45,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:19:45,762 INFO L470 AbstractCegarLoop]: Abstraction has 37697 states and 155320 transitions. [2022-02-11 01:19:45,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:45,762 INFO L276 IsEmpty]: Start isEmpty. Operand 37697 states and 155320 transitions. [2022-02-11 01:19:45,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 01:19:45,862 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:19:45,862 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:19:45,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-11 01:19:46,063 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,SelfDestructingSolverStorable32 [2022-02-11 01:19:46,064 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:19:46,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:19:46,064 INFO L85 PathProgramCache]: Analyzing trace with hash -305709141, now seen corresponding path program 25 times [2022-02-11 01:19:46,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:19:46,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479309866] [2022-02-11 01:19:46,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:19:46,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:19:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:19:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:46,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:19:46,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479309866] [2022-02-11 01:19:46,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479309866] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:19:46,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113292043] [2022-02-11 01:19:46,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:19:46,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:46,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:19:46,512 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:19:46,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-11 01:19:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:19:46,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-11 01:19:46,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:19:46,855 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:19:46,855 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 30 treesize of output 18 [2022-02-11 01:19:47,009 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 37 treesize of output 29 [2022-02-11 01:19:47,034 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 9 [2022-02-11 01:19:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:47,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:19:47,303 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:19:47,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 63 [2022-02-11 01:19:47,586 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:19:47,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 69 [2022-02-11 01:19:47,614 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:19:47,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 85 [2022-02-11 01:19:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:48,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113292043] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:19:48,241 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:19:48,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-02-11 01:19:48,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371865595] [2022-02-11 01:19:48,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:19:48,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 01:19:48,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:19:48,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 01:19:48,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:19:48,243 INFO L87 Difference]: Start difference. First operand 37697 states and 155320 transitions. Second operand has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 34 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:51,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:19:51,854 INFO L93 Difference]: Finished difference Result 91699 states and 372721 transitions. [2022-02-11 01:19:51,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 01:19:51,855 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 34 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 01:19:51,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:19:52,319 INFO L225 Difference]: With dead ends: 91699 [2022-02-11 01:19:52,320 INFO L226 Difference]: Without dead ends: 91443 [2022-02-11 01:19:52,320 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=543, Invalid=3747, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 01:19:52,321 INFO L934 BasicCegarLoop]: 46 mSDtfsCounter, 645 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 3676 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 3773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:19:52,321 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 663 Invalid, 3773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3676 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-11 01:19:52,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91443 states. [2022-02-11 01:19:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91443 to 37049. [2022-02-11 01:19:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37049 states, 37048 states have (on average 4.127051392787735) internal successors, (152899), 37048 states have internal predecessors, (152899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:54,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37049 states to 37049 states and 152899 transitions. [2022-02-11 01:19:54,400 INFO L78 Accepts]: Start accepts. Automaton has 37049 states and 152899 transitions. Word has length 39 [2022-02-11 01:19:54,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:19:54,401 INFO L470 AbstractCegarLoop]: Abstraction has 37049 states and 152899 transitions. [2022-02-11 01:19:54,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 34 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:54,401 INFO L276 IsEmpty]: Start isEmpty. Operand 37049 states and 152899 transitions. [2022-02-11 01:19:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 01:19:54,502 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:19:54,502 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:19:54,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-02-11 01:19:54,702 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,SelfDestructingSolverStorable33 [2022-02-11 01:19:54,702 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 01:19:54,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:19:54,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1678817259, now seen corresponding path program 26 times [2022-02-11 01:19:54,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:19:54,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396796427] [2022-02-11 01:19:54,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:19:54,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:19:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:19:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:55,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:19:55,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396796427] [2022-02-11 01:19:55,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396796427] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:19:55,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670204972] [2022-02-11 01:19:55,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:19:55,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:55,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:19:55,097 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:19:55,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-11 01:19:55,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:19:55,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:19:55,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-11 01:19:55,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:19:55,428 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:19:55,428 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 16 [2022-02-11 01:19:55,539 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 30 treesize of output 22 [2022-02-11 01:19:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:55,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:19:55,833 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:19:55,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 63 [2022-02-11 01:19:56,095 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:19:56,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 70 [2022-02-11 01:19:56,125 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:19:56,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 86 [2022-02-11 01:19:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:56,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670204972] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:19:56,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:19:56,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 33 [2022-02-11 01:19:56,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339915603] [2022-02-11 01:19:56,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:19:56,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 01:19:56,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:19:56,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.