/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/clever.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-bc289cb [2022-01-28 14:35:58,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-28 14:35:58,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-28 14:35:58,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-28 14:35:58,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-28 14:35:58,103 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-28 14:35:58,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-28 14:35:58,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-28 14:35:58,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-28 14:35:58,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-28 14:35:58,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-28 14:35:58,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-01-28 14:35:58,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-28 14:35:58,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-28 14:35:58,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-28 14:35:58,148 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 [2022-01-28 14:35:58,171 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-28 14:35:58,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-28 14:35:58,172 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-28 14:35:58,172 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-28 14:35:58,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-28 14:35:58,172 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-28 14:35:58,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-28 14:35:58,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-28 14:35:58,173 INFO L138 SettingsManager]: * Use SBE=true [2022-01-28 14:35:58,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-28 14:35:58,173 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-28 14:35:58,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-28 14:35:58,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-28 14:35:58,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-28 14:35:58,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-28 14:35:58,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-28 14:35:58,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-28 14:35:58,174 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-28 14:35:58,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-28 14:35:58,174 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-28 14:35:58,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-28 14:35:58,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-28 14:35:58,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-28 14:35:58,174 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-28 14:35:58,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-28 14:35:58,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 14:35:58,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-28 14:35:58,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-28 14:35:58,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-28 14:35:58,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-28 14:35:58,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-28 14:35:58,175 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-28 14:35:58,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-28 14:35:58,175 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-28 14:35:58,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-28 14:35:58,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-28 14:35:58,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-28 14:35:58,405 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-28 14:35:58,406 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-28 14:35:58,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl [2022-01-28 14:35:58,407 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl' [2022-01-28 14:35:58,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-28 14:35:58,428 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-28 14:35:58,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-28 14:35:58,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-28 14:35:58,430 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-28 14:35:58,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:58" (1/1) ... [2022-01-28 14:35:58,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:58" (1/1) ... [2022-01-28 14:35:58,448 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-28 14:35:58,449 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-28 14:35:58,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-28 14:35:58,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-28 14:35:58,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-28 14:35:58,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:58" (1/1) ... [2022-01-28 14:35:58,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:58" (1/1) ... [2022-01-28 14:35:58,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:58" (1/1) ... [2022-01-28 14:35:58,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:58" (1/1) ... [2022-01-28 14:35:58,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:58" (1/1) ... [2022-01-28 14:35:58,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:58" (1/1) ... [2022-01-28 14:35:58,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:58" (1/1) ... [2022-01-28 14:35:58,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-28 14:35:58,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-28 14:35:58,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-28 14:35:58,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-28 14:35:58,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:58" (1/1) ... [2022-01-28 14:35:58,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 14:35:58,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:35:58,509 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-28 14:35:58,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-28 14:35:58,552 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-28 14:35:58,553 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-28 14:35:58,553 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-28 14:35:58,553 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-28 14:35:58,553 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-28 14:35:58,553 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-28 14:35:58,553 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-28 14:35:58,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-28 14:35:58,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-28 14:35:58,554 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-28 14:35:58,590 INFO L234 CfgBuilder]: Building ICFG [2022-01-28 14:35:58,591 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-28 14:35:58,673 INFO L275 CfgBuilder]: Performing block encoding [2022-01-28 14:35:58,677 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-28 14:35:58,677 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-28 14:35:58,679 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:35:58 BoogieIcfgContainer [2022-01-28 14:35:58,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-28 14:35:58,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-28 14:35:58,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-28 14:35:58,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-28 14:35:58,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:58" (1/2) ... [2022-01-28 14:35:58,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@92668a2 and model type clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 02:35:58, skipping insertion in model container [2022-01-28 14:35:58,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:35:58" (2/2) ... [2022-01-28 14:35:58,698 INFO L111 eAbstractionObserver]: Analyzing ICFG clever.wvr.bpl [2022-01-28 14:35:58,701 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-28 14:35:58,701 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-28 14:35:58,701 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-28 14:35:58,701 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-28 14:35:58,735 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-28 14:35:58,773 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-28 14:35:58,780 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-28 14:35:58,780 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-28 14:35:58,790 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 26 transitions, 68 flow [2022-01-28 14:35:58,812 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:58,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:58,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-28 14:35:58,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:58,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:58,819 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:35:58,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:58,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1644387332, now seen corresponding path program 1 times [2022-01-28 14:35:58,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:58,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356507670] [2022-01-28 14:35:58,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:58,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:58,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:35:58,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356507670] [2022-01-28 14:35:58,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356507670] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:35:58,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:35:58,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-28 14:35:59,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757186935] [2022-01-28 14:35:59,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:35:59,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-28 14:35:59,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:35:59,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-28 14:35:59,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 14:35:59,051 INFO L87 Difference]: Start difference. First operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:59,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:35:59,104 INFO L93 Difference]: Finished difference Result 99 states and 202 transitions. [2022-01-28 14:35:59,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-28 14:35:59,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-28 14:35:59,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:35:59,121 INFO L225 Difference]: With dead ends: 99 [2022-01-28 14:35:59,122 INFO L226 Difference]: Without dead ends: 92 [2022-01-28 14:35:59,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 14:35:59,125 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:35:59,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:35:59,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-28 14:35:59,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2022-01-28 14:35:59,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:59,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2022-01-28 14:35:59,206 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 12 [2022-01-28 14:35:59,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:35:59,207 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2022-01-28 14:35:59,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:59,207 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2022-01-28 14:35:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-28 14:35:59,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:59,208 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:59,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-28 14:35:59,208 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:35:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:59,209 INFO L85 PathProgramCache]: Analyzing trace with hash 27040755, now seen corresponding path program 1 times [2022-01-28 14:35:59,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:59,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345643022] [2022-01-28 14:35:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:59,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:59,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:35:59,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345643022] [2022-01-28 14:35:59,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345643022] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:35:59,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067831906] [2022-01-28 14:35:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:59,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:35:59,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:35:59,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:35:59,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-28 14:35:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:59,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-28 14:35:59,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:35:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:59,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:35:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:59,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067831906] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:35:59,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:35:59,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-01-28 14:35:59,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574776991] [2022-01-28 14:35:59,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:35:59,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:35:59,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:35:59,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:35:59,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:35:59,416 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:59,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:35:59,494 INFO L93 Difference]: Finished difference Result 189 states and 379 transitions. [2022-01-28 14:35:59,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 14:35:59,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-28 14:35:59,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:35:59,496 INFO L225 Difference]: With dead ends: 189 [2022-01-28 14:35:59,496 INFO L226 Difference]: Without dead ends: 189 [2022-01-28 14:35:59,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-01-28 14:35:59,497 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:35:59,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 59 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:35:59,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-28 14:35:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 101. [2022-01-28 14:35:59,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.13) internal successors, (213), 100 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:59,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 213 transitions. [2022-01-28 14:35:59,507 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 213 transitions. Word has length 15 [2022-01-28 14:35:59,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:35:59,507 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 213 transitions. [2022-01-28 14:35:59,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:59,507 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 213 transitions. [2022-01-28 14:35:59,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-28 14:35:59,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:59,508 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:59,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-28 14:35:59,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:35:59,728 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:35:59,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:59,729 INFO L85 PathProgramCache]: Analyzing trace with hash 704095387, now seen corresponding path program 2 times [2022-01-28 14:35:59,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:59,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982612424] [2022-01-28 14:35:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:59,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:59,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:35:59,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982612424] [2022-01-28 14:35:59,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982612424] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:35:59,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:35:59,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 14:35:59,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254366838] [2022-01-28 14:35:59,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:35:59,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 14:35:59,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:35:59,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 14:35:59,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 14:35:59,777 INFO L87 Difference]: Start difference. First operand 101 states and 213 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:59,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:35:59,819 INFO L93 Difference]: Finished difference Result 120 states and 245 transitions. [2022-01-28 14:35:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:35:59,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-28 14:35:59,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:35:59,821 INFO L225 Difference]: With dead ends: 120 [2022-01-28 14:35:59,821 INFO L226 Difference]: Without dead ends: 113 [2022-01-28 14:35:59,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:35:59,824 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:35:59,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 42 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:35:59,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-28 14:35:59,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2022-01-28 14:35:59,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.1) internal successors, (210), 100 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2022-01-28 14:35:59,837 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 15 [2022-01-28 14:35:59,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:35:59,837 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2022-01-28 14:35:59,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:59,837 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2022-01-28 14:35:59,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:35:59,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:59,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:59,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-28 14:35:59,838 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:35:59,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:59,839 INFO L85 PathProgramCache]: Analyzing trace with hash -583322209, now seen corresponding path program 1 times [2022-01-28 14:35:59,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:59,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054141628] [2022-01-28 14:35:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:59,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:00,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:00,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054141628] [2022-01-28 14:36:00,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054141628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:00,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436192762] [2022-01-28 14:36:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:00,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:00,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:00,050 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:00,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 14:36:00,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:00,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-28 14:36:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:00,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:00,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436192762] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:00,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:00,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-01-28 14:36:00,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747372223] [2022-01-28 14:36:00,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:00,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 14:36:00,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:00,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 14:36:00,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:36:00,255 INFO L87 Difference]: Start difference. First operand 101 states and 210 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:00,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:00,556 INFO L93 Difference]: Finished difference Result 372 states and 784 transitions. [2022-01-28 14:36:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:36:00,556 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 14:36:00,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:00,557 INFO L225 Difference]: With dead ends: 372 [2022-01-28 14:36:00,557 INFO L226 Difference]: Without dead ends: 328 [2022-01-28 14:36:00,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:36:00,558 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 173 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:00,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 202 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:36:00,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-28 14:36:00,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 162. [2022-01-28 14:36:00,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.3229813664596275) internal successors, (374), 161 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:00,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 374 transitions. [2022-01-28 14:36:00,566 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 374 transitions. Word has length 19 [2022-01-28 14:36:00,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:00,567 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 374 transitions. [2022-01-28 14:36:00,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:00,567 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 374 transitions. [2022-01-28 14:36:00,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:36:00,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:00,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:00,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:00,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-28 14:36:00,784 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:00,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:00,784 INFO L85 PathProgramCache]: Analyzing trace with hash 304723312, now seen corresponding path program 1 times [2022-01-28 14:36:00,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:00,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380421583] [2022-01-28 14:36:00,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:00,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:00,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:00,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380421583] [2022-01-28 14:36:00,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380421583] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:36:00,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:36:00,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 14:36:00,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076180944] [2022-01-28 14:36:00,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:36:00,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:36:00,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:00,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:36:00,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:36:00,818 INFO L87 Difference]: Start difference. First operand 162 states and 374 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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) [2022-01-28 14:36:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:00,837 INFO L93 Difference]: Finished difference Result 187 states and 429 transitions. [2022-01-28 14:36:00,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:36:00,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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 [2022-01-28 14:36:00,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:00,839 INFO L225 Difference]: With dead ends: 187 [2022-01-28 14:36:00,839 INFO L226 Difference]: Without dead ends: 187 [2022-01-28 14:36:00,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:36:00,839 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:00,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:36:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-28 14:36:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 162. [2022-01-28 14:36:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.329192546583851) internal successors, (375), 161 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 375 transitions. [2022-01-28 14:36:00,845 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 375 transitions. Word has length 19 [2022-01-28 14:36:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:00,845 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 375 transitions. [2022-01-28 14:36:00,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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) [2022-01-28 14:36:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 375 transitions. [2022-01-28 14:36:00,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-28 14:36:00,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:00,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:00,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-28 14:36:00,847 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:00,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:00,847 INFO L85 PathProgramCache]: Analyzing trace with hash -560508981, now seen corresponding path program 1 times [2022-01-28 14:36:00,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:00,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929017032] [2022-01-28 14:36:00,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:00,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:01,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:01,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929017032] [2022-01-28 14:36:01,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929017032] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:01,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022472074] [2022-01-28 14:36:01,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:01,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:01,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:01,011 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:01,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-28 14:36:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:01,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-28 14:36:01,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:01,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:01,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022472074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:01,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:01,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-01-28 14:36:01,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569341507] [2022-01-28 14:36:01,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:01,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:36:01,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:01,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:36:01,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:36:01,410 INFO L87 Difference]: Start difference. First operand 162 states and 375 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:02,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:02,189 INFO L93 Difference]: Finished difference Result 689 states and 1490 transitions. [2022-01-28 14:36:02,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-28 14:36:02,190 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 22 [2022-01-28 14:36:02,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:02,192 INFO L225 Difference]: With dead ends: 689 [2022-01-28 14:36:02,192 INFO L226 Difference]: Without dead ends: 675 [2022-01-28 14:36:02,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=319, Invalid=1573, Unknown=0, NotChecked=0, Total=1892 [2022-01-28 14:36:02,193 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 295 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:02,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 592 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:36:02,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-01-28 14:36:02,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 352. [2022-01-28 14:36:02,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.393162393162393) internal successors, (840), 351 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:02,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 840 transitions. [2022-01-28 14:36:02,203 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 840 transitions. Word has length 22 [2022-01-28 14:36:02,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:02,203 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 840 transitions. [2022-01-28 14:36:02,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:02,203 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 840 transitions. [2022-01-28 14:36:02,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-28 14:36:02,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:02,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:02,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-28 14:36:02,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:02,435 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:02,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:02,436 INFO L85 PathProgramCache]: Analyzing trace with hash 700260299, now seen corresponding path program 2 times [2022-01-28 14:36:02,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:02,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332294502] [2022-01-28 14:36:02,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:02,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:02,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:02,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332294502] [2022-01-28 14:36:02,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332294502] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:02,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391061516] [2022-01-28 14:36:02,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:36:02,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:02,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:02,557 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:02,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-28 14:36:02,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:36:02,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:02,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-28 14:36:02,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:02,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:02,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391061516] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:02,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:02,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-01-28 14:36:02,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085995382] [2022-01-28 14:36:02,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:02,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:36:02,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:02,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:36:02,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:36:02,924 INFO L87 Difference]: Start difference. First operand 352 states and 840 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:03,718 INFO L93 Difference]: Finished difference Result 1141 states and 2511 transitions. [2022-01-28 14:36:03,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-28 14:36:03,718 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 22 [2022-01-28 14:36:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:03,724 INFO L225 Difference]: With dead ends: 1141 [2022-01-28 14:36:03,724 INFO L226 Difference]: Without dead ends: 1113 [2022-01-28 14:36:03,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=292, Invalid=1514, Unknown=0, NotChecked=0, Total=1806 [2022-01-28 14:36:03,726 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 322 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:03,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 498 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:36:03,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-01-28 14:36:03,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 625. [2022-01-28 14:36:03,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.4166666666666665) internal successors, (1508), 624 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1508 transitions. [2022-01-28 14:36:03,742 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1508 transitions. Word has length 22 [2022-01-28 14:36:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:03,742 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1508 transitions. [2022-01-28 14:36:03,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1508 transitions. [2022-01-28 14:36:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-28 14:36:03,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:03,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:03,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:03,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:03,960 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:03,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:03,960 INFO L85 PathProgramCache]: Analyzing trace with hash 380237771, now seen corresponding path program 3 times [2022-01-28 14:36:03,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:03,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626259518] [2022-01-28 14:36:03,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:03,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:04,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:04,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626259518] [2022-01-28 14:36:04,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626259518] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:04,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750792941] [2022-01-28 14:36:04,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:36:04,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:04,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:04,100 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:04,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-28 14:36:04,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:36:04,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:04,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-28 14:36:04,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:04,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:04,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750792941] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:04,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:04,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2022-01-28 14:36:04,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597505045] [2022-01-28 14:36:04,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:04,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:36:04,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:04,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:36:04,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:36:04,434 INFO L87 Difference]: Start difference. First operand 625 states and 1508 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:04,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:04,923 INFO L93 Difference]: Finished difference Result 1215 states and 2790 transitions. [2022-01-28 14:36:04,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:36:04,924 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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 22 [2022-01-28 14:36:04,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:04,927 INFO L225 Difference]: With dead ends: 1215 [2022-01-28 14:36:04,928 INFO L226 Difference]: Without dead ends: 1194 [2022-01-28 14:36:04,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:36:04,928 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 189 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:04,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 560 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:36:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-01-28 14:36:04,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 862. [2022-01-28 14:36:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.464576074332172) internal successors, (2122), 861 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2122 transitions. [2022-01-28 14:36:04,948 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2122 transitions. Word has length 22 [2022-01-28 14:36:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:04,949 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 2122 transitions. [2022-01-28 14:36:04,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2122 transitions. [2022-01-28 14:36:04,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-28 14:36:04,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:04,950 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:04,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:05,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:05,166 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:05,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:05,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1627974969, now seen corresponding path program 4 times [2022-01-28 14:36:05,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:05,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052658234] [2022-01-28 14:36:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:05,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:05,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:05,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052658234] [2022-01-28 14:36:05,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052658234] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:05,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485616096] [2022-01-28 14:36:05,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:36:05,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:05,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:05,286 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:05,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-28 14:36:05,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:36:05,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:05,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-28 14:36:05,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:05,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:05,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485616096] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:05,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:05,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-01-28 14:36:05,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634478536] [2022-01-28 14:36:05,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:05,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:36:05,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:05,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:36:05,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:36:05,612 INFO L87 Difference]: Start difference. First operand 862 states and 2122 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:05,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:05,976 INFO L93 Difference]: Finished difference Result 1178 states and 2781 transitions. [2022-01-28 14:36:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:36:05,976 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 22 [2022-01-28 14:36:05,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:05,980 INFO L225 Difference]: With dead ends: 1178 [2022-01-28 14:36:05,980 INFO L226 Difference]: Without dead ends: 1157 [2022-01-28 14:36:05,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:36:05,981 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 151 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:05,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 517 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:36:05,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-01-28 14:36:06,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 922. [2022-01-28 14:36:06,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.478827361563518) internal successors, (2283), 921 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:06,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2283 transitions. [2022-01-28 14:36:06,020 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2283 transitions. Word has length 22 [2022-01-28 14:36:06,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:06,020 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 2283 transitions. [2022-01-28 14:36:06,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:06,020 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2283 transitions. [2022-01-28 14:36:06,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 14:36:06,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:06,022 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:06,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:06,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:06,238 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:06,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:06,238 INFO L85 PathProgramCache]: Analyzing trace with hash -361604473, now seen corresponding path program 2 times [2022-01-28 14:36:06,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:06,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808461007] [2022-01-28 14:36:06,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:06,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:06,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:06,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808461007] [2022-01-28 14:36:06,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808461007] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:06,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347228789] [2022-01-28 14:36:06,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:36:06,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:06,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:06,320 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:06,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-28 14:36:06,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:36:06,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:06,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 14:36:06,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:06,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:06,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347228789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:06,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:06,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-01-28 14:36:06,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283664604] [2022-01-28 14:36:06,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:06,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 14:36:06,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:06,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 14:36:06,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:36:06,468 INFO L87 Difference]: Start difference. First operand 922 states and 2283 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:06,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:06,596 INFO L93 Difference]: Finished difference Result 3353 states and 8090 transitions. [2022-01-28 14:36:06,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:36:06,597 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 14:36:06,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:06,607 INFO L225 Difference]: With dead ends: 3353 [2022-01-28 14:36:06,607 INFO L226 Difference]: Without dead ends: 3353 [2022-01-28 14:36:06,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:36:06,607 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 136 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:06,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 192 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:36:06,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3353 states. [2022-01-28 14:36:06,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3353 to 2738. [2022-01-28 14:36:06,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2738 states, 2737 states have (on average 2.5637559371574716) internal successors, (7017), 2737 states have internal predecessors, (7017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:06,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2738 states to 2738 states and 7017 transitions. [2022-01-28 14:36:06,656 INFO L78 Accepts]: Start accepts. Automaton has 2738 states and 7017 transitions. Word has length 25 [2022-01-28 14:36:06,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:06,656 INFO L470 AbstractCegarLoop]: Abstraction has 2738 states and 7017 transitions. [2022-01-28 14:36:06,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:06,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2738 states and 7017 transitions. [2022-01-28 14:36:06,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 14:36:06,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:06,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:06,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:06,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:06,872 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:06,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:06,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1307585132, now seen corresponding path program 5 times [2022-01-28 14:36:06,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:06,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677111962] [2022-01-28 14:36:06,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:06,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:06,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:06,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677111962] [2022-01-28 14:36:06,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677111962] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:06,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112409460] [2022-01-28 14:36:06,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:36:06,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:06,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:06,899 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:06,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-28 14:36:06,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:36:06,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:06,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 14:36:06,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:06,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:06,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112409460] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:06,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:06,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-28 14:36:06,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651998393] [2022-01-28 14:36:06,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:06,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:36:06,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:06,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:36:06,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:36:06,997 INFO L87 Difference]: Start difference. First operand 2738 states and 7017 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) [2022-01-28 14:36:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:07,052 INFO L93 Difference]: Finished difference Result 4288 states and 10732 transitions. [2022-01-28 14:36:07,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-28 14:36:07,063 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 25 [2022-01-28 14:36:07,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:07,077 INFO L225 Difference]: With dead ends: 4288 [2022-01-28 14:36:07,077 INFO L226 Difference]: Without dead ends: 4285 [2022-01-28 14:36:07,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:36:07,078 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:07,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 91 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:36:07,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2022-01-28 14:36:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 3233. [2022-01-28 14:36:07,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3233 states, 3232 states have (on average 2.5693069306930694) internal successors, (8304), 3232 states have internal predecessors, (8304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 8304 transitions. [2022-01-28 14:36:07,185 INFO L78 Accepts]: Start accepts. Automaton has 3233 states and 8304 transitions. Word has length 25 [2022-01-28 14:36:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:07,185 INFO L470 AbstractCegarLoop]: Abstraction has 3233 states and 8304 transitions. [2022-01-28 14:36:07,186 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) [2022-01-28 14:36:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3233 states and 8304 transitions. [2022-01-28 14:36:07,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 14:36:07,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:07,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:07,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-28 14:36:07,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-28 14:36:07,403 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:07,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1500532664, now seen corresponding path program 6 times [2022-01-28 14:36:07,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:07,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692477542] [2022-01-28 14:36:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:07,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:07,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:07,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692477542] [2022-01-28 14:36:07,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692477542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:07,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474194572] [2022-01-28 14:36:07,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:36:07,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:07,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:07,429 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:07,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-28 14:36:07,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:36:07,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:07,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 14:36:07,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:07,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:07,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474194572] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:07,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:07,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-28 14:36:07,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069643800] [2022-01-28 14:36:07,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:07,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:36:07,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:07,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:36:07,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:36:07,526 INFO L87 Difference]: Start difference. First operand 3233 states and 8304 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:07,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:07,588 INFO L93 Difference]: Finished difference Result 5574 states and 14046 transitions. [2022-01-28 14:36:07,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-28 14:36:07,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 14:36:07,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:07,615 INFO L225 Difference]: With dead ends: 5574 [2022-01-28 14:36:07,615 INFO L226 Difference]: Without dead ends: 5568 [2022-01-28 14:36:07,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:36:07,616 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:07,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 75 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:36:07,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5568 states. [2022-01-28 14:36:07,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5568 to 3783. [2022-01-28 14:36:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 2.581702802749868) internal successors, (9764), 3782 states have internal predecessors, (9764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 9764 transitions. [2022-01-28 14:36:07,702 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 9764 transitions. Word has length 25 [2022-01-28 14:36:07,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:07,702 INFO L470 AbstractCegarLoop]: Abstraction has 3783 states and 9764 transitions. [2022-01-28 14:36:07,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:07,702 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 9764 transitions. [2022-01-28 14:36:07,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 14:36:07,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:07,706 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:07,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:07,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:07,920 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:07,920 INFO L85 PathProgramCache]: Analyzing trace with hash -137039792, now seen corresponding path program 7 times [2022-01-28 14:36:07,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:07,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60267200] [2022-01-28 14:36:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:07,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:07,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:07,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60267200] [2022-01-28 14:36:07,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60267200] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:07,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182150374] [2022-01-28 14:36:07,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:36:07,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:07,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:07,963 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:07,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-28 14:36:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:08,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 14:36:08,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:08,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:08,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182150374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:08,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:08,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-28 14:36:08,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270976547] [2022-01-28 14:36:08,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:08,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:36:08,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:08,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:36:08,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:36:08,088 INFO L87 Difference]: Start difference. First operand 3783 states and 9764 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:08,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:08,180 INFO L93 Difference]: Finished difference Result 5553 states and 13996 transitions. [2022-01-28 14:36:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:36:08,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 14:36:08,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:08,189 INFO L225 Difference]: With dead ends: 5553 [2022-01-28 14:36:08,190 INFO L226 Difference]: Without dead ends: 5533 [2022-01-28 14:36:08,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:36:08,190 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 115 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:08,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 83 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:36:08,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2022-01-28 14:36:08,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 4298. [2022-01-28 14:36:08,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4298 states, 4297 states have (on average 2.5778450081452178) internal successors, (11077), 4297 states have internal predecessors, (11077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4298 states to 4298 states and 11077 transitions. [2022-01-28 14:36:08,266 INFO L78 Accepts]: Start accepts. Automaton has 4298 states and 11077 transitions. Word has length 25 [2022-01-28 14:36:08,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:08,266 INFO L470 AbstractCegarLoop]: Abstraction has 4298 states and 11077 transitions. [2022-01-28 14:36:08,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:08,266 INFO L276 IsEmpty]: Start isEmpty. Operand 4298 states and 11077 transitions. [2022-01-28 14:36:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 14:36:08,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:08,270 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:08,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:08,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-28 14:36:08,486 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:08,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:08,486 INFO L85 PathProgramCache]: Analyzing trace with hash 552150559, now seen corresponding path program 8 times [2022-01-28 14:36:08,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:08,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314174754] [2022-01-28 14:36:08,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:08,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:08,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:08,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314174754] [2022-01-28 14:36:08,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314174754] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:08,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493716760] [2022-01-28 14:36:08,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:36:08,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:08,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:08,639 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:08,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-28 14:36:08,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:36:08,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:08,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:36:08,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:08,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:09,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493716760] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:09,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:09,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 24 [2022-01-28 14:36:09,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768466822] [2022-01-28 14:36:09,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:09,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:36:09,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:09,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:36:09,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:36:09,116 INFO L87 Difference]: Start difference. First operand 4298 states and 11077 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:10,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:10,116 INFO L93 Difference]: Finished difference Result 7346 states and 18226 transitions. [2022-01-28 14:36:10,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-28 14:36:10,116 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 14:36:10,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:10,131 INFO L225 Difference]: With dead ends: 7346 [2022-01-28 14:36:10,131 INFO L226 Difference]: Without dead ends: 7310 [2022-01-28 14:36:10,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=362, Invalid=2500, Unknown=0, NotChecked=0, Total=2862 [2022-01-28 14:36:10,133 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 345 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:10,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 1074 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:36:10,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7310 states. [2022-01-28 14:36:10,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7310 to 5686. [2022-01-28 14:36:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5686 states, 5685 states have (on average 2.573262972735268) internal successors, (14629), 5685 states have internal predecessors, (14629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:10,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5686 states to 5686 states and 14629 transitions. [2022-01-28 14:36:10,284 INFO L78 Accepts]: Start accepts. Automaton has 5686 states and 14629 transitions. Word has length 25 [2022-01-28 14:36:10,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:10,284 INFO L470 AbstractCegarLoop]: Abstraction has 5686 states and 14629 transitions. [2022-01-28 14:36:10,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:10,285 INFO L276 IsEmpty]: Start isEmpty. Operand 5686 states and 14629 transitions. [2022-01-28 14:36:10,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 14:36:10,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:10,290 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:10,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:10,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-28 14:36:10,507 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:10,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:10,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1395198643, now seen corresponding path program 9 times [2022-01-28 14:36:10,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:10,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627233335] [2022-01-28 14:36:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:10,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:10,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:10,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627233335] [2022-01-28 14:36:10,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627233335] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:10,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278947567] [2022-01-28 14:36:10,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:36:10,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:10,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:10,713 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:10,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-28 14:36:10,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:36:10,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:10,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:36:10,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:10,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:11,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278947567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:11,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:11,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 24 [2022-01-28 14:36:11,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653498543] [2022-01-28 14:36:11,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:11,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:36:11,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:11,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:36:11,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:36:11,219 INFO L87 Difference]: Start difference. First operand 5686 states and 14629 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:11,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:11,967 INFO L93 Difference]: Finished difference Result 7858 states and 19776 transitions. [2022-01-28 14:36:11,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-28 14:36:11,968 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 14:36:11,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:11,981 INFO L225 Difference]: With dead ends: 7858 [2022-01-28 14:36:11,981 INFO L226 Difference]: Without dead ends: 7822 [2022-01-28 14:36:11,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2022-01-28 14:36:11,982 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 308 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:11,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 959 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:36:11,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7822 states. [2022-01-28 14:36:12,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7822 to 6908. [2022-01-28 14:36:12,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6908 states, 6907 states have (on average 2.578398725930216) internal successors, (17809), 6907 states have internal predecessors, (17809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:12,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6908 states to 6908 states and 17809 transitions. [2022-01-28 14:36:12,138 INFO L78 Accepts]: Start accepts. Automaton has 6908 states and 17809 transitions. Word has length 25 [2022-01-28 14:36:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:12,139 INFO L470 AbstractCegarLoop]: Abstraction has 6908 states and 17809 transitions. [2022-01-28 14:36:12,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:12,139 INFO L276 IsEmpty]: Start isEmpty. Operand 6908 states and 17809 transitions. [2022-01-28 14:36:12,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 14:36:12,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:12,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:12,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:12,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-28 14:36:12,359 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:12,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:12,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1207140103, now seen corresponding path program 10 times [2022-01-28 14:36:12,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:12,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335561568] [2022-01-28 14:36:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:12,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:12,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:12,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335561568] [2022-01-28 14:36:12,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335561568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:12,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441041971] [2022-01-28 14:36:12,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:36:12,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:12,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:12,527 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:12,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-28 14:36:12,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:36:12,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:12,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:36:12,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:12,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:12,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441041971] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:12,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:12,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2022-01-28 14:36:12,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822844411] [2022-01-28 14:36:12,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:12,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:36:12,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:12,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:36:12,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:36:12,981 INFO L87 Difference]: Start difference. First operand 6908 states and 17809 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:14,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:14,538 INFO L93 Difference]: Finished difference Result 12698 states and 31660 transitions. [2022-01-28 14:36:14,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-28 14:36:14,539 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 14:36:14,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:14,565 INFO L225 Difference]: With dead ends: 12698 [2022-01-28 14:36:14,565 INFO L226 Difference]: Without dead ends: 12662 [2022-01-28 14:36:14,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=484, Invalid=3422, Unknown=0, NotChecked=0, Total=3906 [2022-01-28 14:36:14,566 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 323 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:14,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 1740 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:36:14,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12662 states. [2022-01-28 14:36:14,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12662 to 10282. [2022-01-28 14:36:14,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10282 states, 10281 states have (on average 2.5722206011088415) internal successors, (26445), 10281 states have internal predecessors, (26445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:14,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10282 states to 10282 states and 26445 transitions. [2022-01-28 14:36:14,789 INFO L78 Accepts]: Start accepts. Automaton has 10282 states and 26445 transitions. Word has length 25 [2022-01-28 14:36:14,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:14,790 INFO L470 AbstractCegarLoop]: Abstraction has 10282 states and 26445 transitions. [2022-01-28 14:36:14,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 10282 states and 26445 transitions. [2022-01-28 14:36:14,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-28 14:36:14,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:14,805 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:14,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-28 14:36:15,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-28 14:36:15,019 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:15,020 INFO L85 PathProgramCache]: Analyzing trace with hash 563330891, now seen corresponding path program 11 times [2022-01-28 14:36:15,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:15,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469756489] [2022-01-28 14:36:15,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:15,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:15,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:15,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469756489] [2022-01-28 14:36:15,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469756489] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:15,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779313737] [2022-01-28 14:36:15,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:36:15,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:15,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:15,184 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:15,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-28 14:36:15,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 14:36:15,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:15,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:36:15,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:15,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:15,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779313737] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:15,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:15,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-01-28 14:36:15,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647943184] [2022-01-28 14:36:15,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:15,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:36:15,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:15,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:36:15,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:36:15,852 INFO L87 Difference]: Start difference. First operand 10282 states and 26445 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:19,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:19,907 INFO L93 Difference]: Finished difference Result 19095 states and 47762 transitions. [2022-01-28 14:36:19,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-28 14:36:19,908 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-28 14:36:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:19,935 INFO L225 Difference]: With dead ends: 19095 [2022-01-28 14:36:19,935 INFO L226 Difference]: Without dead ends: 19030 [2022-01-28 14:36:19,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5970 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2059, Invalid=15497, Unknown=0, NotChecked=0, Total=17556 [2022-01-28 14:36:19,939 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 1016 mSDsluCounter, 2066 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 1995 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:19,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1016 Valid, 1995 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1809 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 14:36:19,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19030 states. [2022-01-28 14:36:20,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19030 to 16042. [2022-01-28 14:36:20,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16042 states, 16041 states have (on average 2.5694158718284394) internal successors, (41216), 16041 states have internal predecessors, (41216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:20,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16042 states to 16042 states and 41216 transitions. [2022-01-28 14:36:20,272 INFO L78 Accepts]: Start accepts. Automaton has 16042 states and 41216 transitions. Word has length 28 [2022-01-28 14:36:20,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:20,273 INFO L470 AbstractCegarLoop]: Abstraction has 16042 states and 41216 transitions. [2022-01-28 14:36:20,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:20,273 INFO L276 IsEmpty]: Start isEmpty. Operand 16042 states and 41216 transitions. [2022-01-28 14:36:20,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-28 14:36:20,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:20,286 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:20,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:20,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:20,502 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:20,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:20,503 INFO L85 PathProgramCache]: Analyzing trace with hash 384948611, now seen corresponding path program 12 times [2022-01-28 14:36:20,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:20,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046695555] [2022-01-28 14:36:20,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:20,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:20,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:20,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046695555] [2022-01-28 14:36:20,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046695555] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:20,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284657832] [2022-01-28 14:36:20,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:36:20,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:20,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:20,697 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:20,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-28 14:36:20,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:36:20,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:20,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:36:20,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:21,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:21,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284657832] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:21,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:21,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-01-28 14:36:21,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78349131] [2022-01-28 14:36:21,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:21,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:36:21,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:21,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:36:21,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:36:21,367 INFO L87 Difference]: Start difference. First operand 16042 states and 41216 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:25,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:25,093 INFO L93 Difference]: Finished difference Result 33116 states and 82977 transitions. [2022-01-28 14:36:25,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-28 14:36:25,094 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-28 14:36:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:25,224 INFO L225 Difference]: With dead ends: 33116 [2022-01-28 14:36:25,224 INFO L226 Difference]: Without dead ends: 33054 [2022-01-28 14:36:25,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4789 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1755, Invalid=12765, Unknown=0, NotChecked=0, Total=14520 [2022-01-28 14:36:25,227 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 907 mSDsluCounter, 2435 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 2290 SdHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:25,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 2290 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 14:36:25,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33054 states. [2022-01-28 14:36:25,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33054 to 28120. [2022-01-28 14:36:25,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28120 states, 28119 states have (on average 2.5689391514634234) internal successors, (72236), 28119 states have internal predecessors, (72236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:26,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28120 states to 28120 states and 72236 transitions. [2022-01-28 14:36:26,097 INFO L78 Accepts]: Start accepts. Automaton has 28120 states and 72236 transitions. Word has length 28 [2022-01-28 14:36:26,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:26,097 INFO L470 AbstractCegarLoop]: Abstraction has 28120 states and 72236 transitions. [2022-01-28 14:36:26,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:26,097 INFO L276 IsEmpty]: Start isEmpty. Operand 28120 states and 72236 transitions. [2022-01-28 14:36:26,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-28 14:36:26,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:26,120 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:26,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:26,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-28 14:36:26,336 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:26,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:26,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1131111861, now seen corresponding path program 13 times [2022-01-28 14:36:26,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:26,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503679410] [2022-01-28 14:36:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:26,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:26,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:26,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503679410] [2022-01-28 14:36:26,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503679410] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:26,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626071588] [2022-01-28 14:36:26,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:36:26,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:26,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:26,520 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:26,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-28 14:36:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:26,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:36:26,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:26,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:36:26,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626071588] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:26,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:26,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2022-01-28 14:36:26,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596373468] [2022-01-28 14:36:26,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:26,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 14:36:26,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:26,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 14:36:26,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:36:26,979 INFO L87 Difference]: Start difference. First operand 28120 states and 72236 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:28,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:28,929 INFO L93 Difference]: Finished difference Result 32737 states and 83118 transitions. [2022-01-28 14:36:28,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-28 14:36:28,929 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-28 14:36:28,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:29,005 INFO L225 Difference]: With dead ends: 32737 [2022-01-28 14:36:29,005 INFO L226 Difference]: Without dead ends: 32688 [2022-01-28 14:36:29,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=661, Invalid=5345, Unknown=0, NotChecked=0, Total=6006 [2022-01-28 14:36:29,006 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 442 mSDsluCounter, 2229 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:29,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 1891 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:36:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32688 states. [2022-01-28 14:36:29,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32688 to 30427. [2022-01-28 14:36:29,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30427 states, 30426 states have (on average 2.5686583842766058) internal successors, (78154), 30426 states have internal predecessors, (78154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30427 states to 30427 states and 78154 transitions. [2022-01-28 14:36:29,659 INFO L78 Accepts]: Start accepts. Automaton has 30427 states and 78154 transitions. Word has length 28 [2022-01-28 14:36:29,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:29,660 INFO L470 AbstractCegarLoop]: Abstraction has 30427 states and 78154 transitions. [2022-01-28 14:36:29,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:29,660 INFO L276 IsEmpty]: Start isEmpty. Operand 30427 states and 78154 transitions. [2022-01-28 14:36:29,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-28 14:36:29,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:29,677 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:29,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:29,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:29,893 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:29,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:29,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1451134389, now seen corresponding path program 14 times [2022-01-28 14:36:29,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:29,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952112105] [2022-01-28 14:36:29,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:29,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:30,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:30,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952112105] [2022-01-28 14:36:30,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952112105] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:30,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551089613] [2022-01-28 14:36:30,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:36:30,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:30,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:30,060 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:30,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-28 14:36:30,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:36:30,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:30,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:36:30,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:30,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-28 14:36:30,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551089613] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:30,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:30,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 26 [2022-01-28 14:36:30,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740638011] [2022-01-28 14:36:30,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:30,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:36:30,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:30,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:36:30,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:36:30,518 INFO L87 Difference]: Start difference. First operand 30427 states and 78154 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:31,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:31,899 INFO L93 Difference]: Finished difference Result 34892 states and 88413 transitions. [2022-01-28 14:36:31,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-28 14:36:31,900 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-28 14:36:31,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:31,969 INFO L225 Difference]: With dead ends: 34892 [2022-01-28 14:36:31,969 INFO L226 Difference]: Without dead ends: 34822 [2022-01-28 14:36:31,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=503, Invalid=3919, Unknown=0, NotChecked=0, Total=4422 [2022-01-28 14:36:31,970 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 435 mSDsluCounter, 1715 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:31,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 1435 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:36:32,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34822 states. [2022-01-28 14:36:32,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34822 to 31263. [2022-01-28 14:36:32,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31263 states, 31262 states have (on average 2.5682297997568933) internal successors, (80288), 31262 states have internal predecessors, (80288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31263 states to 31263 states and 80288 transitions. [2022-01-28 14:36:32,799 INFO L78 Accepts]: Start accepts. Automaton has 31263 states and 80288 transitions. Word has length 28 [2022-01-28 14:36:32,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:32,799 INFO L470 AbstractCegarLoop]: Abstraction has 31263 states and 80288 transitions. [2022-01-28 14:36:32,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:32,800 INFO L276 IsEmpty]: Start isEmpty. Operand 31263 states and 80288 transitions. [2022-01-28 14:36:32,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-28 14:36:32,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:32,815 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:32,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-28 14:36:33,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:33,026 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:33,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:33,031 INFO L85 PathProgramCache]: Analyzing trace with hash 835620167, now seen corresponding path program 15 times [2022-01-28 14:36:33,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:33,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508019692] [2022-01-28 14:36:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:33,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:33,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:33,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508019692] [2022-01-28 14:36:33,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508019692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:33,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275826680] [2022-01-28 14:36:33,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:36:33,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:33,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:33,213 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:33,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-28 14:36:33,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 14:36:33,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:33,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:36:33,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:33,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:36:33,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275826680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:33,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:33,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2022-01-28 14:36:33,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454417538] [2022-01-28 14:36:33,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:33,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 14:36:33,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:33,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 14:36:33,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:36:33,718 INFO L87 Difference]: Start difference. First operand 31263 states and 80288 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:34,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:34,713 INFO L93 Difference]: Finished difference Result 37680 states and 95652 transitions. [2022-01-28 14:36:34,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-28 14:36:34,713 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-28 14:36:34,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:34,795 INFO L225 Difference]: With dead ends: 37680 [2022-01-28 14:36:34,795 INFO L226 Difference]: Without dead ends: 37644 [2022-01-28 14:36:34,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=330, Invalid=2532, Unknown=0, NotChecked=0, Total=2862 [2022-01-28 14:36:34,796 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 341 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:34,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 1256 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:36:34,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37644 states. [2022-01-28 14:36:35,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37644 to 34762. [2022-01-28 14:36:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34762 states, 34761 states have (on average 2.574925922729496) internal successors, (89507), 34761 states have internal predecessors, (89507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34762 states to 34762 states and 89507 transitions. [2022-01-28 14:36:35,649 INFO L78 Accepts]: Start accepts. Automaton has 34762 states and 89507 transitions. Word has length 28 [2022-01-28 14:36:35,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:35,649 INFO L470 AbstractCegarLoop]: Abstraction has 34762 states and 89507 transitions. [2022-01-28 14:36:35,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:35,649 INFO L276 IsEmpty]: Start isEmpty. Operand 34762 states and 89507 transitions. [2022-01-28 14:36:35,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 14:36:35,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:35,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:35,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-28 14:36:35,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:35,892 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:35,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:35,893 INFO L85 PathProgramCache]: Analyzing trace with hash -807763788, now seen corresponding path program 16 times [2022-01-28 14:36:35,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:35,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167609630] [2022-01-28 14:36:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:35,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:36:35,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:35,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167609630] [2022-01-28 14:36:35,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167609630] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:35,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139450254] [2022-01-28 14:36:35,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:36:35,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:35,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:35,964 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:35,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-28 14:36:36,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:36:36,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:36,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 14:36:36,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:36:36,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:36:36,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139450254] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:36,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:36,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2022-01-28 14:36:36,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100830186] [2022-01-28 14:36:36,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:36,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 14:36:36,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:36,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 14:36:36,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:36:36,103 INFO L87 Difference]: Start difference. First operand 34762 states and 89507 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:36,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:36,406 INFO L93 Difference]: Finished difference Result 26614 states and 65956 transitions. [2022-01-28 14:36:36,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:36:36,406 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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 29 [2022-01-28 14:36:36,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:36,463 INFO L225 Difference]: With dead ends: 26614 [2022-01-28 14:36:36,463 INFO L226 Difference]: Without dead ends: 26614 [2022-01-28 14:36:36,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-01-28 14:36:36,464 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 106 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:36,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 175 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:36:36,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26614 states. [2022-01-28 14:36:36,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26614 to 23391. [2022-01-28 14:36:36,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23391 states, 23390 states have (on average 2.534972210346302) internal successors, (59293), 23390 states have internal predecessors, (59293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23391 states to 23391 states and 59293 transitions. [2022-01-28 14:36:36,968 INFO L78 Accepts]: Start accepts. Automaton has 23391 states and 59293 transitions. Word has length 29 [2022-01-28 14:36:36,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:36,969 INFO L470 AbstractCegarLoop]: Abstraction has 23391 states and 59293 transitions. [2022-01-28 14:36:36,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:36,969 INFO L276 IsEmpty]: Start isEmpty. Operand 23391 states and 59293 transitions. [2022-01-28 14:36:36,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 14:36:36,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:36,983 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:37,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:37,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:37,201 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:37,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:37,202 INFO L85 PathProgramCache]: Analyzing trace with hash -183781140, now seen corresponding path program 17 times [2022-01-28 14:36:37,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:37,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561622260] [2022-01-28 14:36:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:37,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:36:37,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:37,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561622260] [2022-01-28 14:36:37,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561622260] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:37,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32137072] [2022-01-28 14:36:37,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:36:37,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:37,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:37,244 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:37,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-28 14:36:37,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:36:37,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:37,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 14:36:37,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:36:37,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:36:37,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32137072] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:37,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:37,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-28 14:36:37,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855833717] [2022-01-28 14:36:37,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:37,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 14:36:37,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:37,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 14:36:37,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-28 14:36:37,355 INFO L87 Difference]: Start difference. First operand 23391 states and 59293 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:37,588 INFO L93 Difference]: Finished difference Result 19626 states and 48862 transitions. [2022-01-28 14:36:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:36:37,589 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 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 [2022-01-28 14:36:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:37,627 INFO L225 Difference]: With dead ends: 19626 [2022-01-28 14:36:37,627 INFO L226 Difference]: Without dead ends: 19088 [2022-01-28 14:36:37,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-28 14:36:37,628 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:37,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 100 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:36:37,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19088 states. [2022-01-28 14:36:37,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19088 to 18247. [2022-01-28 14:36:38,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18247 states, 18246 states have (on average 2.5042749095692205) internal successors, (45693), 18246 states have internal predecessors, (45693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:38,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18247 states to 18247 states and 45693 transitions. [2022-01-28 14:36:38,043 INFO L78 Accepts]: Start accepts. Automaton has 18247 states and 45693 transitions. Word has length 29 [2022-01-28 14:36:38,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:38,043 INFO L470 AbstractCegarLoop]: Abstraction has 18247 states and 45693 transitions. [2022-01-28 14:36:38,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:38,043 INFO L276 IsEmpty]: Start isEmpty. Operand 18247 states and 45693 transitions. [2022-01-28 14:36:38,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 14:36:38,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:38,052 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:38,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:38,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-28 14:36:38,270 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:38,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:38,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1939288821, now seen corresponding path program 3 times [2022-01-28 14:36:38,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:38,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345023292] [2022-01-28 14:36:38,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:38,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:38,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:38,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345023292] [2022-01-28 14:36:38,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345023292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:38,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196672576] [2022-01-28 14:36:38,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:36:38,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:38,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:38,297 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:38,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-28 14:36:38,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:36:38,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:38,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:36:38,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:38,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:38,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196672576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:38,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:38,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-28 14:36:38,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234721493] [2022-01-28 14:36:38,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:38,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:36:38,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:38,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:36:38,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:36:38,408 INFO L87 Difference]: Start difference. First operand 18247 states and 45693 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:38,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:38,547 INFO L93 Difference]: Finished difference Result 23138 states and 57057 transitions. [2022-01-28 14:36:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:36:38,547 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 29 [2022-01-28 14:36:38,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:38,590 INFO L225 Difference]: With dead ends: 23138 [2022-01-28 14:36:38,590 INFO L226 Difference]: Without dead ends: 23135 [2022-01-28 14:36:38,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:36:38,591 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 63 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:38,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 149 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:36:38,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23135 states. [2022-01-28 14:36:38,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23135 to 19973. [2022-01-28 14:36:39,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19973 states, 19972 states have (on average 2.5174243941518126) internal successors, (50278), 19972 states have internal predecessors, (50278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:39,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19973 states to 19973 states and 50278 transitions. [2022-01-28 14:36:39,059 INFO L78 Accepts]: Start accepts. Automaton has 19973 states and 50278 transitions. Word has length 29 [2022-01-28 14:36:39,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:39,059 INFO L470 AbstractCegarLoop]: Abstraction has 19973 states and 50278 transitions. [2022-01-28 14:36:39,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:39,150 INFO L276 IsEmpty]: Start isEmpty. Operand 19973 states and 50278 transitions. [2022-01-28 14:36:39,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 14:36:39,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:39,161 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:39,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:39,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-28 14:36:39,378 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:39,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:39,378 INFO L85 PathProgramCache]: Analyzing trace with hash -976130165, now seen corresponding path program 4 times [2022-01-28 14:36:39,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:39,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261043177] [2022-01-28 14:36:39,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:39,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:39,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:39,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261043177] [2022-01-28 14:36:39,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261043177] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:39,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765380278] [2022-01-28 14:36:39,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:36:39,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:39,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:39,409 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:39,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-28 14:36:39,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:36:39,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:39,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:36:39,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:36:39,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:36:39,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765380278] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:39,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:39,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-28 14:36:39,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959248546] [2022-01-28 14:36:39,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:39,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:36:39,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:39,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:36:39,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:36:39,532 INFO L87 Difference]: Start difference. First operand 19973 states and 50278 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:39,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:39,702 INFO L93 Difference]: Finished difference Result 30211 states and 74727 transitions. [2022-01-28 14:36:39,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:36:39,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2022-01-28 14:36:39,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:39,768 INFO L225 Difference]: With dead ends: 30211 [2022-01-28 14:36:39,768 INFO L226 Difference]: Without dead ends: 30205 [2022-01-28 14:36:39,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:36:39,771 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 119 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:39,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 108 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:36:39,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30205 states. [2022-01-28 14:36:40,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30205 to 21738. [2022-01-28 14:36:40,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21738 states, 21737 states have (on average 2.5046234530984037) internal successors, (54443), 21737 states have internal predecessors, (54443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:40,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21738 states to 21738 states and 54443 transitions. [2022-01-28 14:36:40,408 INFO L78 Accepts]: Start accepts. Automaton has 21738 states and 54443 transitions. Word has length 29 [2022-01-28 14:36:40,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:40,408 INFO L470 AbstractCegarLoop]: Abstraction has 21738 states and 54443 transitions. [2022-01-28 14:36:40,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:40,409 INFO L276 IsEmpty]: Start isEmpty. Operand 21738 states and 54443 transitions. [2022-01-28 14:36:40,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 14:36:40,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:40,419 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:40,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-28 14:36:40,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:40,632 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:40,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:40,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1681264675, now seen corresponding path program 5 times [2022-01-28 14:36:40,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:40,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69137823] [2022-01-28 14:36:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:40,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:40,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:40,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69137823] [2022-01-28 14:36:40,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69137823] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:40,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277994778] [2022-01-28 14:36:40,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:36:40,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:40,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:40,694 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:40,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-28 14:36:40,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:36:40,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:40,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:36:40,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:40,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:40,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277994778] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:40,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:40,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-28 14:36:40,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128262759] [2022-01-28 14:36:40,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:40,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 14:36:40,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:40,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 14:36:40,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:36:40,857 INFO L87 Difference]: Start difference. First operand 21738 states and 54443 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:41,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:41,058 INFO L93 Difference]: Finished difference Result 27079 states and 66694 transitions. [2022-01-28 14:36:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:36:41,059 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2022-01-28 14:36:41,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:41,124 INFO L225 Difference]: With dead ends: 27079 [2022-01-28 14:36:41,124 INFO L226 Difference]: Without dead ends: 27067 [2022-01-28 14:36:41,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-28 14:36:41,125 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 123 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:41,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 120 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:36:41,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27067 states. [2022-01-28 14:36:41,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27067 to 22680. [2022-01-28 14:36:41,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22680 states, 22679 states have (on average 2.5144847656422242) internal successors, (57026), 22679 states have internal predecessors, (57026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22680 states to 22680 states and 57026 transitions. [2022-01-28 14:36:41,705 INFO L78 Accepts]: Start accepts. Automaton has 22680 states and 57026 transitions. Word has length 29 [2022-01-28 14:36:41,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:41,705 INFO L470 AbstractCegarLoop]: Abstraction has 22680 states and 57026 transitions. [2022-01-28 14:36:41,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:41,705 INFO L276 IsEmpty]: Start isEmpty. Operand 22680 states and 57026 transitions. [2022-01-28 14:36:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 14:36:41,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:41,713 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:41,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:41,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:41,929 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:41,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:41,929 INFO L85 PathProgramCache]: Analyzing trace with hash -587660293, now seen corresponding path program 18 times [2022-01-28 14:36:41,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:41,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936936981] [2022-01-28 14:36:41,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:41,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:41,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:41,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936936981] [2022-01-28 14:36:41,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936936981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:41,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894944179] [2022-01-28 14:36:41,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:36:41,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:41,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:41,957 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:41,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-28 14:36:41,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:36:41,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:41,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 14:36:41,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:42,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:42,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894944179] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:42,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:42,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-28 14:36:42,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743722189] [2022-01-28 14:36:42,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:42,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:36:42,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:42,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:36:42,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:36:42,076 INFO L87 Difference]: Start difference. First operand 22680 states and 57026 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:42,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:42,236 INFO L93 Difference]: Finished difference Result 28120 states and 70004 transitions. [2022-01-28 14:36:42,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:36:42,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 29 [2022-01-28 14:36:42,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:42,298 INFO L225 Difference]: With dead ends: 28120 [2022-01-28 14:36:42,298 INFO L226 Difference]: Without dead ends: 27988 [2022-01-28 14:36:42,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:36:42,298 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 75 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:42,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 102 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:36:42,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27988 states. [2022-01-28 14:36:42,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27988 to 27218. [2022-01-28 14:36:42,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27218 states, 27217 states have (on average 2.5050152478230516) internal successors, (68179), 27217 states have internal predecessors, (68179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:43,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27218 states to 27218 states and 68179 transitions. [2022-01-28 14:36:43,022 INFO L78 Accepts]: Start accepts. Automaton has 27218 states and 68179 transitions. Word has length 29 [2022-01-28 14:36:43,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:43,022 INFO L470 AbstractCegarLoop]: Abstraction has 27218 states and 68179 transitions. [2022-01-28 14:36:43,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:43,022 INFO L276 IsEmpty]: Start isEmpty. Operand 27218 states and 68179 transitions. [2022-01-28 14:36:43,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 14:36:43,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:43,032 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:43,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:43,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-28 14:36:43,256 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:43,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1682739263, now seen corresponding path program 19 times [2022-01-28 14:36:43,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:43,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633658212] [2022-01-28 14:36:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:43,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:43,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:43,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633658212] [2022-01-28 14:36:43,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633658212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:43,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337703441] [2022-01-28 14:36:43,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:36:43,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:43,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:43,301 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:43,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-28 14:36:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:43,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 14:36:43,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:36:43,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:36:43,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337703441] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:43,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:43,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-28 14:36:43,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55379813] [2022-01-28 14:36:43,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:43,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:36:43,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:43,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:36:43,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:36:43,420 INFO L87 Difference]: Start difference. First operand 27218 states and 68179 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) [2022-01-28 14:36:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:43,567 INFO L93 Difference]: Finished difference Result 27540 states and 68054 transitions. [2022-01-28 14:36:43,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:36:43,568 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 29 [2022-01-28 14:36:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:43,634 INFO L225 Difference]: With dead ends: 27540 [2022-01-28 14:36:43,634 INFO L226 Difference]: Without dead ends: 27537 [2022-01-28 14:36:43,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-28 14:36:43,635 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 80 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:43,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 82 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:36:43,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27537 states. [2022-01-28 14:36:44,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27537 to 27194. [2022-01-28 14:36:44,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27194 states, 27193 states have (on average 2.4762254992093555) internal successors, (67336), 27193 states have internal predecessors, (67336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:44,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27194 states to 27194 states and 67336 transitions. [2022-01-28 14:36:44,127 INFO L78 Accepts]: Start accepts. Automaton has 27194 states and 67336 transitions. Word has length 29 [2022-01-28 14:36:44,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:44,127 INFO L470 AbstractCegarLoop]: Abstraction has 27194 states and 67336 transitions. [2022-01-28 14:36:44,127 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) [2022-01-28 14:36:44,127 INFO L276 IsEmpty]: Start isEmpty. Operand 27194 states and 67336 transitions. [2022-01-28 14:36:44,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 14:36:44,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:44,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:44,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:44,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-28 14:36:44,351 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:44,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:44,351 INFO L85 PathProgramCache]: Analyzing trace with hash -712336569, now seen corresponding path program 20 times [2022-01-28 14:36:44,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:44,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275726873] [2022-01-28 14:36:44,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:44,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:44,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:44,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275726873] [2022-01-28 14:36:44,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275726873] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:44,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146800995] [2022-01-28 14:36:44,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:36:44,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:44,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:44,370 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:44,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-28 14:36:44,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:36:44,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:44,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 14:36:44,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:36:44,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:36:44,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146800995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:44,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:44,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-28 14:36:44,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102322155] [2022-01-28 14:36:44,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:44,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:36:44,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:44,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:36:44,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:36:44,478 INFO L87 Difference]: Start difference. First operand 27194 states and 67336 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:44,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:44,745 INFO L93 Difference]: Finished difference Result 31849 states and 78450 transitions. [2022-01-28 14:36:44,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-28 14:36:44,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-28 14:36:44,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:44,810 INFO L225 Difference]: With dead ends: 31849 [2022-01-28 14:36:44,810 INFO L226 Difference]: Without dead ends: 31837 [2022-01-28 14:36:44,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:36:44,811 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:44,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 97 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:36:44,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31837 states. [2022-01-28 14:36:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31837 to 31644. [2022-01-28 14:36:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31644 states, 31643 states have (on average 2.4666118888853776) internal successors, (78051), 31643 states have internal predecessors, (78051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:45,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31644 states to 31644 states and 78051 transitions. [2022-01-28 14:36:45,481 INFO L78 Accepts]: Start accepts. Automaton has 31644 states and 78051 transitions. Word has length 29 [2022-01-28 14:36:45,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:45,482 INFO L470 AbstractCegarLoop]: Abstraction has 31644 states and 78051 transitions. [2022-01-28 14:36:45,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:45,482 INFO L276 IsEmpty]: Start isEmpty. Operand 31644 states and 78051 transitions. [2022-01-28 14:36:45,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 14:36:45,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:45,492 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:45,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-28 14:36:45,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-28 14:36:45,712 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:45,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:45,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1117704309, now seen corresponding path program 21 times [2022-01-28 14:36:45,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:45,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244493381] [2022-01-28 14:36:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:45,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:45,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:45,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244493381] [2022-01-28 14:36:45,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244493381] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:45,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140875232] [2022-01-28 14:36:45,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:36:45,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:45,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:45,751 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:45,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-28 14:36:45,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:36:45,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:45,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 14:36:45,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:36:45,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:36:45,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140875232] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:45,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:45,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-28 14:36:45,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057542274] [2022-01-28 14:36:45,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:45,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:36:45,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:45,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:36:45,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:36:45,867 INFO L87 Difference]: Start difference. First operand 31644 states and 78051 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:46,201 INFO L93 Difference]: Finished difference Result 32521 states and 79874 transitions. [2022-01-28 14:36:46,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:36:46,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-28 14:36:46,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:46,270 INFO L225 Difference]: With dead ends: 32521 [2022-01-28 14:36:46,270 INFO L226 Difference]: Without dead ends: 32518 [2022-01-28 14:36:46,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-28 14:36:46,271 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 61 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:46,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 78 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:36:46,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32518 states. [2022-01-28 14:36:46,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32518 to 32276. [2022-01-28 14:36:46,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32276 states, 32275 states have (on average 2.4610069713400464) internal successors, (79429), 32275 states have internal predecessors, (79429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32276 states to 32276 states and 79429 transitions. [2022-01-28 14:36:46,912 INFO L78 Accepts]: Start accepts. Automaton has 32276 states and 79429 transitions. Word has length 29 [2022-01-28 14:36:46,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:46,912 INFO L470 AbstractCegarLoop]: Abstraction has 32276 states and 79429 transitions. [2022-01-28 14:36:46,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:46,912 INFO L276 IsEmpty]: Start isEmpty. Operand 32276 states and 79429 transitions. [2022-01-28 14:36:46,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 14:36:46,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:46,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:46,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:47,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:47,135 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:47,136 INFO L85 PathProgramCache]: Analyzing trace with hash -652390267, now seen corresponding path program 22 times [2022-01-28 14:36:47,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:47,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241417019] [2022-01-28 14:36:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:47,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:47,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:47,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241417019] [2022-01-28 14:36:47,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241417019] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:47,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772914364] [2022-01-28 14:36:47,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:36:47,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:47,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:47,162 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:47,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-28 14:36:47,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:36:47,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:47,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 14:36:47,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:47,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:47,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772914364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:47,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:47,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-28 14:36:47,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455103212] [2022-01-28 14:36:47,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:47,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:36:47,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:47,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:36:47,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:36:47,251 INFO L87 Difference]: Start difference. First operand 32276 states and 79429 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:47,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:47,539 INFO L93 Difference]: Finished difference Result 32461 states and 78954 transitions. [2022-01-28 14:36:47,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:36:47,540 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-28 14:36:47,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:47,598 INFO L225 Difference]: With dead ends: 32461 [2022-01-28 14:36:47,598 INFO L226 Difference]: Without dead ends: 32458 [2022-01-28 14:36:47,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:36:47,599 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 63 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:47,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 103 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:36:47,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32458 states. [2022-01-28 14:36:48,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32458 to 31677. [2022-01-28 14:36:48,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31677 states, 31676 states have (on average 2.4392600075767144) internal successors, (77266), 31676 states have internal predecessors, (77266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31677 states to 31677 states and 77266 transitions. [2022-01-28 14:36:48,191 INFO L78 Accepts]: Start accepts. Automaton has 31677 states and 77266 transitions. Word has length 29 [2022-01-28 14:36:48,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:48,192 INFO L470 AbstractCegarLoop]: Abstraction has 31677 states and 77266 transitions. [2022-01-28 14:36:48,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:48,192 INFO L276 IsEmpty]: Start isEmpty. Operand 31677 states and 77266 transitions. [2022-01-28 14:36:48,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-28 14:36:48,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:48,204 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:48,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:48,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:48,419 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:48,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:48,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1949861535, now seen corresponding path program 23 times [2022-01-28 14:36:48,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:48,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703584352] [2022-01-28 14:36:48,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:48,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:36:48,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:48,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703584352] [2022-01-28 14:36:48,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703584352] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:48,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592666561] [2022-01-28 14:36:48,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:36:48,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:48,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:48,666 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:48,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-28 14:36:48,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 14:36:48,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:48,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 14:36:48,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:48,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:49,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592666561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:49,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:49,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 33 [2022-01-28 14:36:49,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609323347] [2022-01-28 14:36:49,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:49,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-28 14:36:49,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:49,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-28 14:36:49,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:36:49,364 INFO L87 Difference]: Start difference. First operand 31677 states and 77266 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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) [2022-01-28 14:36:54,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:54,607 INFO L93 Difference]: Finished difference Result 58198 states and 139350 transitions. [2022-01-28 14:36:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-28 14:36:54,608 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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 31 [2022-01-28 14:36:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:54,832 INFO L225 Difference]: With dead ends: 58198 [2022-01-28 14:36:54,832 INFO L226 Difference]: Without dead ends: 58059 [2022-01-28 14:36:54,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6410 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2189, Invalid=18117, Unknown=0, NotChecked=0, Total=20306 [2022-01-28 14:36:54,835 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 589 mSDsluCounter, 4159 mSDsCounter, 0 mSdLazyCounter, 3058 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 3939 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 3058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:54,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 3939 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 3058 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-28 14:36:54,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58059 states. [2022-01-28 14:36:55,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58059 to 49360. [2022-01-28 14:36:55,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49360 states, 49359 states have (on average 2.4268117263315707) internal successors, (119785), 49359 states have internal predecessors, (119785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:55,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49360 states to 49360 states and 119785 transitions. [2022-01-28 14:36:55,902 INFO L78 Accepts]: Start accepts. Automaton has 49360 states and 119785 transitions. Word has length 31 [2022-01-28 14:36:55,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:55,902 INFO L470 AbstractCegarLoop]: Abstraction has 49360 states and 119785 transitions. [2022-01-28 14:36:55,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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) [2022-01-28 14:36:55,903 INFO L276 IsEmpty]: Start isEmpty. Operand 49360 states and 119785 transitions. [2022-01-28 14:36:55,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-28 14:36:55,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:55,919 INFO L514 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] [2022-01-28 14:36:55,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:56,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:56,136 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:56,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:56,136 INFO L85 PathProgramCache]: Analyzing trace with hash 364490902, now seen corresponding path program 24 times [2022-01-28 14:36:56,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:56,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256182944] [2022-01-28 14:36:56,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:56,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:56,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:56,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256182944] [2022-01-28 14:36:56,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256182944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:56,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541906442] [2022-01-28 14:36:56,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:36:56,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:56,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:56,336 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:56,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-28 14:36:56,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:36:56,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:56,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:36:56,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:56,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:56,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541906442] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:56,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:56,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-28 14:36:56,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045100566] [2022-01-28 14:36:56,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:56,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:36:56,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:56,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:36:56,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:36:56,835 INFO L87 Difference]: Start difference. First operand 49360 states and 119785 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:58,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:58,260 INFO L93 Difference]: Finished difference Result 56844 states and 136543 transitions. [2022-01-28 14:36:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-28 14:36:58,260 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-28 14:36:58,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:58,409 INFO L225 Difference]: With dead ends: 56844 [2022-01-28 14:36:58,410 INFO L226 Difference]: Without dead ends: 56827 [2022-01-28 14:36:58,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=350, Invalid=2302, Unknown=0, NotChecked=0, Total=2652 [2022-01-28 14:36:58,410 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 346 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:58,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 949 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:36:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56827 states. [2022-01-28 14:36:59,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56827 to 50980. [2022-01-28 14:36:59,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50980 states, 50979 states have (on average 2.429882892955923) internal successors, (123873), 50979 states have internal predecessors, (123873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:59,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50980 states to 50980 states and 123873 transitions. [2022-01-28 14:36:59,593 INFO L78 Accepts]: Start accepts. Automaton has 50980 states and 123873 transitions. Word has length 32 [2022-01-28 14:36:59,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:59,593 INFO L470 AbstractCegarLoop]: Abstraction has 50980 states and 123873 transitions. [2022-01-28 14:36:59,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:59,593 INFO L276 IsEmpty]: Start isEmpty. Operand 50980 states and 123873 transitions. [2022-01-28 14:36:59,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-28 14:36:59,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:59,609 INFO L514 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] [2022-01-28 14:36:59,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:59,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-28 14:36:59,825 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:36:59,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:59,826 INFO L85 PathProgramCache]: Analyzing trace with hash -870392482, now seen corresponding path program 25 times [2022-01-28 14:36:59,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:59,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26207629] [2022-01-28 14:36:59,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:59,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:59,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:59,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26207629] [2022-01-28 14:36:59,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26207629] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:59,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791265967] [2022-01-28 14:36:59,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:36:59,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:59,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:59,970 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:36:59,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-28 14:37:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:00,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:37:00,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:37:00,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:37:00,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791265967] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:00,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:00,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-28 14:37:00,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185089407] [2022-01-28 14:37:00,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:00,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:37:00,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:00,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:37:00,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:37:00,472 INFO L87 Difference]: Start difference. First operand 50980 states and 123873 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:01,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:01,696 INFO L93 Difference]: Finished difference Result 54768 states and 132232 transitions. [2022-01-28 14:37:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-28 14:37:01,696 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-28 14:37:01,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:01,838 INFO L225 Difference]: With dead ends: 54768 [2022-01-28 14:37:01,839 INFO L226 Difference]: Without dead ends: 54751 [2022-01-28 14:37:01,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=282, Invalid=1698, Unknown=0, NotChecked=0, Total=1980 [2022-01-28 14:37:01,839 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 265 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:01,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 699 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:37:01,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54751 states. [2022-01-28 14:37:02,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54751 to 51314. [2022-01-28 14:37:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51314 states, 51313 states have (on average 2.42998850193908) internal successors, (124690), 51313 states have internal predecessors, (124690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51314 states to 51314 states and 124690 transitions. [2022-01-28 14:37:03,007 INFO L78 Accepts]: Start accepts. Automaton has 51314 states and 124690 transitions. Word has length 32 [2022-01-28 14:37:03,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:03,007 INFO L470 AbstractCegarLoop]: Abstraction has 51314 states and 124690 transitions. [2022-01-28 14:37:03,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:03,007 INFO L276 IsEmpty]: Start isEmpty. Operand 51314 states and 124690 transitions. [2022-01-28 14:37:03,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-28 14:37:03,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:03,027 INFO L514 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] [2022-01-28 14:37:03,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-28 14:37:03,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:03,240 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:37:03,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:03,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1401588830, now seen corresponding path program 26 times [2022-01-28 14:37:03,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:03,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789029085] [2022-01-28 14:37:03,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:03,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:03,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:03,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789029085] [2022-01-28 14:37:03,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789029085] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:03,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489763190] [2022-01-28 14:37:03,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:37:03,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:03,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:03,382 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:37:03,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-28 14:37:03,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:37:03,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:37:03,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:37:03,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:37:03,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:37:04,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489763190] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:04,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:04,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-28 14:37:04,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914477327] [2022-01-28 14:37:04,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:04,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:37:04,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:04,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:37:04,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:37:04,021 INFO L87 Difference]: Start difference. First operand 51314 states and 124690 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:05,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:05,142 INFO L93 Difference]: Finished difference Result 64967 states and 156641 transitions. [2022-01-28 14:37:05,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-28 14:37:05,142 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-28 14:37:05,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:05,294 INFO L225 Difference]: With dead ends: 64967 [2022-01-28 14:37:05,295 INFO L226 Difference]: Without dead ends: 64904 [2022-01-28 14:37:05,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=308, Invalid=2044, Unknown=0, NotChecked=0, Total=2352 [2022-01-28 14:37:05,295 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 277 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:05,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 1076 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:37:05,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64904 states. [2022-01-28 14:37:06,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64904 to 57619. [2022-01-28 14:37:06,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57619 states, 57618 states have (on average 2.4426220972612724) internal successors, (140739), 57618 states have internal predecessors, (140739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57619 states to 57619 states and 140739 transitions. [2022-01-28 14:37:06,719 INFO L78 Accepts]: Start accepts. Automaton has 57619 states and 140739 transitions. Word has length 32 [2022-01-28 14:37:06,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:06,720 INFO L470 AbstractCegarLoop]: Abstraction has 57619 states and 140739 transitions. [2022-01-28 14:37:06,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:06,720 INFO L276 IsEmpty]: Start isEmpty. Operand 57619 states and 140739 transitions. [2022-01-28 14:37:06,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-28 14:37:06,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:06,739 INFO L514 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] [2022-01-28 14:37:06,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-28 14:37:06,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:06,959 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:37:06,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:06,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1434729592, now seen corresponding path program 27 times [2022-01-28 14:37:06,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:06,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623027692] [2022-01-28 14:37:06,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:06,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:07,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:07,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623027692] [2022-01-28 14:37:07,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623027692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:07,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842086690] [2022-01-28 14:37:07,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:37:07,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:07,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:07,095 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:37:07,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-28 14:37:07,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 14:37:07,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:37:07,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:37:07,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:37:07,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:37:07,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842086690] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:07,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:07,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-01-28 14:37:07,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234914834] [2022-01-28 14:37:07,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:07,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 14:37:07,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:07,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 14:37:07,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:37:07,695 INFO L87 Difference]: Start difference. First operand 57619 states and 140739 transitions. Second operand has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:09,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:09,912 INFO L93 Difference]: Finished difference Result 72626 states and 176105 transitions. [2022-01-28 14:37:09,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-28 14:37:09,912 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-28 14:37:09,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:10,319 INFO L225 Difference]: With dead ends: 72626 [2022-01-28 14:37:10,319 INFO L226 Difference]: Without dead ends: 72563 [2022-01-28 14:37:10,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=915, Invalid=5405, Unknown=0, NotChecked=0, Total=6320 [2022-01-28 14:37:10,327 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 540 mSDsluCounter, 2095 mSDsCounter, 0 mSdLazyCounter, 1803 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 2006 SdHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:10,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 2006 Invalid, 1944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1803 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 14:37:10,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72563 states. [2022-01-28 14:37:11,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72563 to 64327. [2022-01-28 14:37:11,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64327 states, 64326 states have (on average 2.448683269595498) internal successors, (157514), 64326 states have internal predecessors, (157514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64327 states to 64327 states and 157514 transitions. [2022-01-28 14:37:11,696 INFO L78 Accepts]: Start accepts. Automaton has 64327 states and 157514 transitions. Word has length 32 [2022-01-28 14:37:11,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:11,696 INFO L470 AbstractCegarLoop]: Abstraction has 64327 states and 157514 transitions. [2022-01-28 14:37:11,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:11,696 INFO L276 IsEmpty]: Start isEmpty. Operand 64327 states and 157514 transitions. [2022-01-28 14:37:11,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-28 14:37:11,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:11,718 INFO L514 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] [2022-01-28 14:37:11,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-28 14:37:11,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-28 14:37:11,931 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:37:11,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:11,932 INFO L85 PathProgramCache]: Analyzing trace with hash 837251720, now seen corresponding path program 28 times [2022-01-28 14:37:11,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:11,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089664104] [2022-01-28 14:37:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:11,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:12,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:12,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089664104] [2022-01-28 14:37:12,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089664104] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:12,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301795136] [2022-01-28 14:37:12,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:37:12,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:12,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:12,062 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:37:12,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-28 14:37:12,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:37:12,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:37:12,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:37:12,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:37:12,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:37:12,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301795136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:12,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:12,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-28 14:37:12,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240763087] [2022-01-28 14:37:12,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:12,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:37:12,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:12,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:37:12,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:37:12,746 INFO L87 Difference]: Start difference. First operand 64327 states and 157514 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:13,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:13,755 INFO L93 Difference]: Finished difference Result 83954 states and 203391 transitions. [2022-01-28 14:37:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-28 14:37:13,755 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-28 14:37:13,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:13,978 INFO L225 Difference]: With dead ends: 83954 [2022-01-28 14:37:13,978 INFO L226 Difference]: Without dead ends: 83893 [2022-01-28 14:37:13,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 14:37:13,978 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 246 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:13,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 879 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:37:14,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83893 states. [2022-01-28 14:37:15,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83893 to 73827. [2022-01-28 14:37:15,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73827 states, 73826 states have (on average 2.455435754341289) internal successors, (181275), 73826 states have internal predecessors, (181275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73827 states to 73827 states and 181275 transitions. [2022-01-28 14:37:15,703 INFO L78 Accepts]: Start accepts. Automaton has 73827 states and 181275 transitions. Word has length 32 [2022-01-28 14:37:15,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:15,703 INFO L470 AbstractCegarLoop]: Abstraction has 73827 states and 181275 transitions. [2022-01-28 14:37:15,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:15,703 INFO L276 IsEmpty]: Start isEmpty. Operand 73827 states and 181275 transitions. [2022-01-28 14:37:15,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-28 14:37:15,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:15,961 INFO L514 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] [2022-01-28 14:37:15,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-28 14:37:16,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-28 14:37:16,177 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:37:16,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:16,178 INFO L85 PathProgramCache]: Analyzing trace with hash -609168994, now seen corresponding path program 29 times [2022-01-28 14:37:16,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:16,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663005672] [2022-01-28 14:37:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:16,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:16,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:16,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663005672] [2022-01-28 14:37:16,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663005672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:16,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296332086] [2022-01-28 14:37:16,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:37:16,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:16,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:16,265 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:37:16,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-28 14:37:16,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:37:16,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:37:16,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:37:16,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:37:16,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:37:16,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296332086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:16,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:16,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-28 14:37:16,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125730698] [2022-01-28 14:37:16,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:16,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:37:16,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:16,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:37:16,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:37:16,608 INFO L87 Difference]: Start difference. First operand 73827 states and 181275 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:18,002 INFO L93 Difference]: Finished difference Result 79410 states and 194385 transitions. [2022-01-28 14:37:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-28 14:37:18,003 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-28 14:37:18,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:18,156 INFO L225 Difference]: With dead ends: 79410 [2022-01-28 14:37:18,156 INFO L226 Difference]: Without dead ends: 79376 [2022-01-28 14:37:18,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=379, Invalid=2591, Unknown=0, NotChecked=0, Total=2970 [2022-01-28 14:37:18,156 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 266 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:18,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 962 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:37:18,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79376 states. [2022-01-28 14:37:19,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79376 to 76802. [2022-01-28 14:37:19,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76802 states, 76801 states have (on average 2.4606059816929466) internal successors, (188977), 76801 states have internal predecessors, (188977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76802 states to 76802 states and 188977 transitions. [2022-01-28 14:37:19,999 INFO L78 Accepts]: Start accepts. Automaton has 76802 states and 188977 transitions. Word has length 32 [2022-01-28 14:37:19,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:20,000 INFO L470 AbstractCegarLoop]: Abstraction has 76802 states and 188977 transitions. [2022-01-28 14:37:20,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:20,002 INFO L276 IsEmpty]: Start isEmpty. Operand 76802 states and 188977 transitions. [2022-01-28 14:37:20,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-28 14:37:20,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:20,026 INFO L514 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] [2022-01-28 14:37:20,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-28 14:37:20,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-28 14:37:20,239 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:37:20,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:20,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1086215526, now seen corresponding path program 30 times [2022-01-28 14:37:20,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:20,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025520874] [2022-01-28 14:37:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:20,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:20,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:20,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025520874] [2022-01-28 14:37:20,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025520874] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:20,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763250901] [2022-01-28 14:37:20,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:37:20,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:20,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:20,372 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:37:20,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-28 14:37:20,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:37:20,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:37:20,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:37:20,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:37:20,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:37:20,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763250901] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:20,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:20,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-28 14:37:20,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367125983] [2022-01-28 14:37:20,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:20,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:37:20,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:20,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:37:20,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:37:20,720 INFO L87 Difference]: Start difference. First operand 76802 states and 188977 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:21,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:21,832 INFO L93 Difference]: Finished difference Result 81543 states and 199903 transitions. [2022-01-28 14:37:21,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-28 14:37:21,832 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-28 14:37:21,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:21,996 INFO L225 Difference]: With dead ends: 81543 [2022-01-28 14:37:21,996 INFO L226 Difference]: Without dead ends: 81497 [2022-01-28 14:37:21,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2022-01-28 14:37:21,996 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 242 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:21,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 566 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:37:22,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81497 states. [2022-01-28 14:37:23,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81497 to 79939. [2022-01-28 14:37:23,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79939 states, 79938 states have (on average 2.4604318346718705) internal successors, (196682), 79938 states have internal predecessors, (196682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79939 states to 79939 states and 196682 transitions. [2022-01-28 14:37:23,852 INFO L78 Accepts]: Start accepts. Automaton has 79939 states and 196682 transitions. Word has length 32 [2022-01-28 14:37:23,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:23,853 INFO L470 AbstractCegarLoop]: Abstraction has 79939 states and 196682 transitions. [2022-01-28 14:37:23,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:23,853 INFO L276 IsEmpty]: Start isEmpty. Operand 79939 states and 196682 transitions. [2022-01-28 14:37:23,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-28 14:37:23,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:23,882 INFO L514 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] [2022-01-28 14:37:23,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-28 14:37:24,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-28 14:37:24,095 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:37:24,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:24,096 INFO L85 PathProgramCache]: Analyzing trace with hash 505632738, now seen corresponding path program 31 times [2022-01-28 14:37:24,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:24,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439693002] [2022-01-28 14:37:24,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:24,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:24,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:24,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439693002] [2022-01-28 14:37:24,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439693002] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:24,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073517871] [2022-01-28 14:37:24,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:37:24,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:24,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:24,256 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:37:24,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-28 14:37:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:24,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:37:24,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:37:24,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:37:24,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073517871] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:24,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:24,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2022-01-28 14:37:24,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645391501] [2022-01-28 14:37:24,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:24,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:37:24,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:24,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:37:24,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:37:24,673 INFO L87 Difference]: Start difference. First operand 79939 states and 196682 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:25,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:25,725 INFO L93 Difference]: Finished difference Result 92793 states and 226902 transitions. [2022-01-28 14:37:25,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:37:25,726 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 32 [2022-01-28 14:37:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:25,948 INFO L225 Difference]: With dead ends: 92793 [2022-01-28 14:37:25,948 INFO L226 Difference]: Without dead ends: 92750 [2022-01-28 14:37:25,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:37:25,949 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 212 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:25,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 720 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:37:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92750 states. [2022-01-28 14:37:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92750 to 84575. [2022-01-28 14:37:27,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84575 states, 84574 states have (on average 2.4647527608957835) internal successors, (208454), 84574 states have internal predecessors, (208454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84575 states to 84575 states and 208454 transitions. [2022-01-28 14:37:27,918 INFO L78 Accepts]: Start accepts. Automaton has 84575 states and 208454 transitions. Word has length 32 [2022-01-28 14:37:27,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:27,918 INFO L470 AbstractCegarLoop]: Abstraction has 84575 states and 208454 transitions. [2022-01-28 14:37:27,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 84575 states and 208454 transitions. [2022-01-28 14:37:27,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-28 14:37:27,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:27,945 INFO L514 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] [2022-01-28 14:37:27,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-28 14:37:28,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-28 14:37:28,159 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:37:28,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:28,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1012014960, now seen corresponding path program 32 times [2022-01-28 14:37:28,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:28,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839355956] [2022-01-28 14:37:28,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:28,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:28,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:28,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839355956] [2022-01-28 14:37:28,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839355956] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:28,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774928809] [2022-01-28 14:37:28,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:37:28,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:28,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:28,295 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:37:28,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-28 14:37:28,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:37:28,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:37:28,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:37:28,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:37:28,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:37:29,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774928809] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:29,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:29,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 21 [2022-01-28 14:37:29,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497014947] [2022-01-28 14:37:29,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:29,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:37:29,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:29,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:37:29,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:37:29,003 INFO L87 Difference]: Start difference. First operand 84575 states and 208454 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:29,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:29,676 INFO L93 Difference]: Finished difference Result 95832 states and 234336 transitions. [2022-01-28 14:37:29,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-28 14:37:29,676 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-28 14:37:29,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:29,953 INFO L225 Difference]: With dead ends: 95832 [2022-01-28 14:37:29,953 INFO L226 Difference]: Without dead ends: 95790 [2022-01-28 14:37:29,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:37:29,954 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 227 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:29,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 750 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:37:30,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95790 states. [2022-01-28 14:37:31,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95790 to 88530. [2022-01-28 14:37:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88530 states, 88529 states have (on average 2.4685809169876536) internal successors, (218541), 88529 states have internal predecessors, (218541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88530 states to 88530 states and 218541 transitions. [2022-01-28 14:37:32,467 INFO L78 Accepts]: Start accepts. Automaton has 88530 states and 218541 transitions. Word has length 32 [2022-01-28 14:37:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:32,467 INFO L470 AbstractCegarLoop]: Abstraction has 88530 states and 218541 transitions. [2022-01-28 14:37:32,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 88530 states and 218541 transitions. [2022-01-28 14:37:32,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-28 14:37:32,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:32,494 INFO L514 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] [2022-01-28 14:37:32,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-28 14:37:32,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-01-28 14:37:32,710 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:37:32,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:32,711 INFO L85 PathProgramCache]: Analyzing trace with hash 371496324, now seen corresponding path program 33 times [2022-01-28 14:37:32,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:32,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566659288] [2022-01-28 14:37:32,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:32,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:32,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:32,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566659288] [2022-01-28 14:37:32,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566659288] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:32,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456298321] [2022-01-28 14:37:32,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:37:32,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:32,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:32,825 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:37:32,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-28 14:37:32,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:37:32,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:37:32,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:37:32,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:37:33,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:37:33,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456298321] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:33,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:33,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-28 14:37:33,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567446797] [2022-01-28 14:37:33,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:33,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:37:33,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:33,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:37:33,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:37:33,330 INFO L87 Difference]: Start difference. First operand 88530 states and 218541 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:35,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:35,353 INFO L93 Difference]: Finished difference Result 120751 states and 294981 transitions. [2022-01-28 14:37:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-28 14:37:35,354 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-28 14:37:35,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:35,675 INFO L225 Difference]: With dead ends: 120751 [2022-01-28 14:37:35,675 INFO L226 Difference]: Without dead ends: 120710 [2022-01-28 14:37:35,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=480, Invalid=3060, Unknown=0, NotChecked=0, Total=3540 [2022-01-28 14:37:35,676 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 334 mSDsluCounter, 1766 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:35,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 1644 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:37:35,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120710 states. [2022-01-28 14:37:38,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120710 to 106952. [2022-01-28 14:37:38,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106952 states, 106951 states have (on average 2.4723003992482537) internal successors, (264415), 106951 states have internal predecessors, (264415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106952 states to 106952 states and 264415 transitions. [2022-01-28 14:37:38,501 INFO L78 Accepts]: Start accepts. Automaton has 106952 states and 264415 transitions. Word has length 32 [2022-01-28 14:37:38,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:38,501 INFO L470 AbstractCegarLoop]: Abstraction has 106952 states and 264415 transitions. [2022-01-28 14:37:38,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:38,502 INFO L276 IsEmpty]: Start isEmpty. Operand 106952 states and 264415 transitions. [2022-01-28 14:37:38,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-28 14:37:38,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:38,537 INFO L514 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] [2022-01-28 14:37:38,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-28 14:37:38,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-28 14:37:38,743 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:37:38,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:38,744 INFO L85 PathProgramCache]: Analyzing trace with hash -191983202, now seen corresponding path program 34 times [2022-01-28 14:37:38,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:38,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855927005] [2022-01-28 14:37:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:38,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:38,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:38,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855927005] [2022-01-28 14:37:38,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855927005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:38,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898816757] [2022-01-28 14:37:38,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:37:38,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:38,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:38,882 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:37:38,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-28 14:37:38,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:37:38,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:37:38,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:37:38,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:37:39,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:37:39,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898816757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:39,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:39,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-28 14:37:39,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393572925] [2022-01-28 14:37:39,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:39,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:37:39,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:39,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:37:39,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:37:39,362 INFO L87 Difference]: Start difference. First operand 106952 states and 264415 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:40,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:40,578 INFO L93 Difference]: Finished difference Result 113095 states and 278331 transitions. [2022-01-28 14:37:40,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 14:37:40,578 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-28 14:37:40,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:40,888 INFO L225 Difference]: With dead ends: 113095 [2022-01-28 14:37:40,888 INFO L226 Difference]: Without dead ends: 113078 [2022-01-28 14:37:40,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:37:40,888 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 133 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:40,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 592 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:37:41,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113078 states. [2022-01-28 14:37:43,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113078 to 107349. [2022-01-28 14:37:43,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107349 states, 107348 states have (on average 2.472146663188881) internal successors, (265380), 107348 states have internal predecessors, (265380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:43,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107349 states to 107349 states and 265380 transitions. [2022-01-28 14:37:43,450 INFO L78 Accepts]: Start accepts. Automaton has 107349 states and 265380 transitions. Word has length 32 [2022-01-28 14:37:43,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:43,451 INFO L470 AbstractCegarLoop]: Abstraction has 107349 states and 265380 transitions. [2022-01-28 14:37:43,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:43,451 INFO L276 IsEmpty]: Start isEmpty. Operand 107349 states and 265380 transitions. [2022-01-28 14:37:43,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:37:43,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:43,490 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:37:43,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-28 14:37:43,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-01-28 14:37:43,703 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:37:43,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:43,704 INFO L85 PathProgramCache]: Analyzing trace with hash -445666353, now seen corresponding path program 6 times [2022-01-28 14:37:43,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:43,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577846796] [2022-01-28 14:37:43,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:43,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:37:43,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:43,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577846796] [2022-01-28 14:37:43,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577846796] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:43,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201173931] [2022-01-28 14:37:43,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:37:43,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:43,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:43,808 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:37:43,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-28 14:37:43,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-28 14:37:43,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:37:43,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-28 14:37:43,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:37:43,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:37:44,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201173931] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:44,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:44,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-01-28 14:37:44,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211353373] [2022-01-28 14:37:44,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:44,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:37:44,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:44,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:37:44,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:37:44,123 INFO L87 Difference]: Start difference. First operand 107349 states and 265380 transitions. Second operand has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 18 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:45,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:45,171 INFO L93 Difference]: Finished difference Result 114109 states and 280340 transitions. [2022-01-28 14:37:45,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:37:45,171 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 18 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:37:45,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:45,455 INFO L225 Difference]: With dead ends: 114109 [2022-01-28 14:37:45,455 INFO L226 Difference]: Without dead ends: 112943 [2022-01-28 14:37:45,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:37:45,456 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 280 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:45,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 645 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:37:45,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112943 states. [2022-01-28 14:37:47,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112943 to 107149. [2022-01-28 14:37:47,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107149 states, 107148 states have (on average 2.4727946391906523) internal successors, (264955), 107148 states have internal predecessors, (264955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:48,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107149 states to 107149 states and 264955 transitions. [2022-01-28 14:37:48,035 INFO L78 Accepts]: Start accepts. Automaton has 107149 states and 264955 transitions. Word has length 33 [2022-01-28 14:37:48,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:48,035 INFO L470 AbstractCegarLoop]: Abstraction has 107149 states and 264955 transitions. [2022-01-28 14:37:48,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 18 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:48,035 INFO L276 IsEmpty]: Start isEmpty. Operand 107149 states and 264955 transitions. [2022-01-28 14:37:48,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-28 14:37:48,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:48,085 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:37:48,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-28 14:37:48,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:48,301 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:37:48,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:48,302 INFO L85 PathProgramCache]: Analyzing trace with hash -2052471971, now seen corresponding path program 35 times [2022-01-28 14:37:48,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:48,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518274549] [2022-01-28 14:37:48,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:48,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-28 14:37:48,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:48,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518274549] [2022-01-28 14:37:48,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518274549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:48,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488971437] [2022-01-28 14:37:48,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:37:48,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:48,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:48,484 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:37:48,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-28 14:37:48,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 14:37:48,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:37:48,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-28 14:37:48,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:37:48,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:37:49,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488971437] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:49,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:49,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 37 [2022-01-28 14:37:49,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081331434] [2022-01-28 14:37:49,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:49,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-28 14:37:49,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:49,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-28 14:37:49,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 14:37:49,572 INFO L87 Difference]: Start difference. First operand 107149 states and 264955 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:56,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:56,328 INFO L93 Difference]: Finished difference Result 164170 states and 399330 transitions. [2022-01-28 14:37:56,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-01-28 14:37:56,328 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-28 14:37:56,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:56,745 INFO L225 Difference]: With dead ends: 164170 [2022-01-28 14:37:56,745 INFO L226 Difference]: Without dead ends: 164008 [2022-01-28 14:37:56,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11486 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3507, Invalid=30533, Unknown=0, NotChecked=0, Total=34040 [2022-01-28 14:37:56,747 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 815 mSDsluCounter, 5499 mSDsCounter, 0 mSdLazyCounter, 4062 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 5244 SdHoareTripleChecker+Invalid, 4297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 4062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:56,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 5244 Invalid, 4297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 4062 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-28 14:37:56,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164008 states. [2022-01-28 14:37:59,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164008 to 145288. [2022-01-28 14:37:59,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145288 states, 145287 states have (on average 2.463902482672228) internal successors, (357973), 145287 states have internal predecessors, (357973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:00,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145288 states to 145288 states and 357973 transitions. [2022-01-28 14:38:00,343 INFO L78 Accepts]: Start accepts. Automaton has 145288 states and 357973 transitions. Word has length 34 [2022-01-28 14:38:00,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:38:00,343 INFO L470 AbstractCegarLoop]: Abstraction has 145288 states and 357973 transitions. [2022-01-28 14:38:00,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:00,343 INFO L276 IsEmpty]: Start isEmpty. Operand 145288 states and 357973 transitions. [2022-01-28 14:38:00,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-28 14:38:00,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:38:00,395 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:38:00,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-28 14:38:00,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:00,616 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:38:00,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:38:00,617 INFO L85 PathProgramCache]: Analyzing trace with hash 176267436, now seen corresponding path program 36 times [2022-01-28 14:38:00,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:38:00,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375885615] [2022-01-28 14:38:00,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:38:00,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:38:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:00,671 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:38:00,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:38:00,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375885615] [2022-01-28 14:38:00,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375885615] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:38:00,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446693090] [2022-01-28 14:38:00,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:38:00,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:00,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:38:00,688 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:38:00,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-28 14:38:00,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:38:00,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:38:00,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 14:38:00,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:38:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:38:00,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:38:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:38:00,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446693090] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:38:00,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:38:00,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-28 14:38:00,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220392133] [2022-01-28 14:38:00,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:38:00,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 14:38:00,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:38:00,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 14:38:00,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-01-28 14:38:00,836 INFO L87 Difference]: Start difference. First operand 145288 states and 357973 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:01,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:38:01,680 INFO L93 Difference]: Finished difference Result 103418 states and 247086 transitions. [2022-01-28 14:38:01,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:38:01,681 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-28 14:38:01,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:38:01,928 INFO L225 Difference]: With dead ends: 103418 [2022-01-28 14:38:01,928 INFO L226 Difference]: Without dead ends: 103418 [2022-01-28 14:38:01,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:38:01,929 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 122 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:38:01,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 316 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:38:02,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103418 states. [2022-01-28 14:38:03,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103418 to 71860. [2022-01-28 14:38:03,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71860 states, 71859 states have (on average 2.410581833869105) internal successors, (173222), 71859 states have internal predecessors, (173222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71860 states to 71860 states and 173222 transitions. [2022-01-28 14:38:03,742 INFO L78 Accepts]: Start accepts. Automaton has 71860 states and 173222 transitions. Word has length 35 [2022-01-28 14:38:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:38:03,742 INFO L470 AbstractCegarLoop]: Abstraction has 71860 states and 173222 transitions. [2022-01-28 14:38:03,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 71860 states and 173222 transitions. [2022-01-28 14:38:03,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-28 14:38:03,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:38:03,774 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:38:03,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-28 14:38:03,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-28 14:38:03,988 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:38:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:38:03,988 INFO L85 PathProgramCache]: Analyzing trace with hash 624876916, now seen corresponding path program 37 times [2022-01-28 14:38:03,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:38:03,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820558200] [2022-01-28 14:38:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:38:03,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:38:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:38:04,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:38:04,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820558200] [2022-01-28 14:38:04,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820558200] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:38:04,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491048833] [2022-01-28 14:38:04,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:38:04,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:04,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:38:04,027 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:38:04,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-28 14:38:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:04,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 14:38:04,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:38:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:38:04,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:38:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:38:04,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491048833] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:38:04,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:38:04,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-28 14:38:04,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638160804] [2022-01-28 14:38:04,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:38:04,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 14:38:04,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:38:04,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 14:38:04,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-01-28 14:38:04,141 INFO L87 Difference]: Start difference. First operand 71860 states and 173222 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:04,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:38:04,694 INFO L93 Difference]: Finished difference Result 65581 states and 153600 transitions. [2022-01-28 14:38:04,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:38:04,694 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 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 35 [2022-01-28 14:38:04,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:38:04,840 INFO L225 Difference]: With dead ends: 65581 [2022-01-28 14:38:04,840 INFO L226 Difference]: Without dead ends: 65511 [2022-01-28 14:38:04,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:38:04,842 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 213 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:38:04,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 204 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:38:04,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65511 states. [2022-01-28 14:38:05,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65511 to 57103. [2022-01-28 14:38:05,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57103 states, 57102 states have (on average 2.3572904626808167) internal successors, (134606), 57102 states have internal predecessors, (134606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57103 states to 57103 states and 134606 transitions. [2022-01-28 14:38:05,931 INFO L78 Accepts]: Start accepts. Automaton has 57103 states and 134606 transitions. Word has length 35 [2022-01-28 14:38:05,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:38:05,932 INFO L470 AbstractCegarLoop]: Abstraction has 57103 states and 134606 transitions. [2022-01-28 14:38:05,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:05,932 INFO L276 IsEmpty]: Start isEmpty. Operand 57103 states and 134606 transitions. [2022-01-28 14:38:06,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-28 14:38:06,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:38:06,137 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:38:06,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-28 14:38:06,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-28 14:38:06,343 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:38:06,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:38:06,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1359790695, now seen corresponding path program 38 times [2022-01-28 14:38:06,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:38:06,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457910855] [2022-01-28 14:38:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:38:06,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:38:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:38:06,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:38:06,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457910855] [2022-01-28 14:38:06,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457910855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:38:06,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156107698] [2022-01-28 14:38:06,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:38:06,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:06,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:38:06,378 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:38:06,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-28 14:38:06,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:38:06,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:38:06,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:38:06,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:38:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:38:06,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:38:06,482 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:38:06,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156107698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:38:06,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:38:06,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-28 14:38:06,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240360180] [2022-01-28 14:38:06,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:38:06,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:38:06,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:38:06,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:38:06,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:38:06,483 INFO L87 Difference]: Start difference. First operand 57103 states and 134606 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:06,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:38:06,744 INFO L93 Difference]: Finished difference Result 67716 states and 158828 transitions. [2022-01-28 14:38:06,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:38:06,744 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-28 14:38:06,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:38:06,890 INFO L225 Difference]: With dead ends: 67716 [2022-01-28 14:38:06,890 INFO L226 Difference]: Without dead ends: 67716 [2022-01-28 14:38:06,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:38:06,891 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 115 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:38:06,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 78 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:38:06,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67716 states. [2022-01-28 14:38:07,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67716 to 66000. [2022-01-28 14:38:08,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66000 states, 65999 states have (on average 2.363353990211973) internal successors, (155979), 65999 states have internal predecessors, (155979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66000 states to 66000 states and 155979 transitions. [2022-01-28 14:38:08,201 INFO L78 Accepts]: Start accepts. Automaton has 66000 states and 155979 transitions. Word has length 35 [2022-01-28 14:38:08,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:38:08,201 INFO L470 AbstractCegarLoop]: Abstraction has 66000 states and 155979 transitions. [2022-01-28 14:38:08,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:08,201 INFO L276 IsEmpty]: Start isEmpty. Operand 66000 states and 155979 transitions. [2022-01-28 14:38:08,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-28 14:38:08,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:38:08,222 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:38:08,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-28 14:38:08,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-28 14:38:08,437 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:38:08,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:38:08,437 INFO L85 PathProgramCache]: Analyzing trace with hash -682736063, now seen corresponding path program 39 times [2022-01-28 14:38:08,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:38:08,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243863414] [2022-01-28 14:38:08,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:38:08,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:38:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:38:08,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:38:08,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243863414] [2022-01-28 14:38:08,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243863414] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:38:08,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58762379] [2022-01-28 14:38:08,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:38:08,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:08,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:38:08,478 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:38:08,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-28 14:38:08,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:38:08,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:38:08,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:38:08,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:38:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:38:08,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:38:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:38:08,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58762379] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:38:08,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:38:08,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-28 14:38:08,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549341443] [2022-01-28 14:38:08,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:38:08,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:38:08,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:38:08,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:38:08,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:38:08,577 INFO L87 Difference]: Start difference. First operand 66000 states and 155979 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:09,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:38:09,068 INFO L93 Difference]: Finished difference Result 68361 states and 159847 transitions. [2022-01-28 14:38:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:38:09,069 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-28 14:38:09,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:38:09,204 INFO L225 Difference]: With dead ends: 68361 [2022-01-28 14:38:09,205 INFO L226 Difference]: Without dead ends: 68358 [2022-01-28 14:38:09,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:38:09,205 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 115 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:38:09,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 93 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:38:09,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68358 states. [2022-01-28 14:38:10,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68358 to 66000. [2022-01-28 14:38:10,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66000 states, 65999 states have (on average 2.362596402975803) internal successors, (155929), 65999 states have internal predecessors, (155929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:10,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66000 states to 66000 states and 155929 transitions. [2022-01-28 14:38:10,518 INFO L78 Accepts]: Start accepts. Automaton has 66000 states and 155929 transitions. Word has length 35 [2022-01-28 14:38:10,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:38:10,518 INFO L470 AbstractCegarLoop]: Abstraction has 66000 states and 155929 transitions. [2022-01-28 14:38:10,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:10,518 INFO L276 IsEmpty]: Start isEmpty. Operand 66000 states and 155929 transitions. [2022-01-28 14:38:10,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-28 14:38:10,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:38:10,540 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:38:10,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-28 14:38:10,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:10,759 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:38:10,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:38:10,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1974658777, now seen corresponding path program 40 times [2022-01-28 14:38:10,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:38:10,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327084898] [2022-01-28 14:38:10,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:38:10,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:38:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:38:10,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:38:10,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327084898] [2022-01-28 14:38:10,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327084898] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:38:10,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079316546] [2022-01-28 14:38:10,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:38:10,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:10,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:38:10,784 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:38:10,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-28 14:38:10,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:38:10,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:38:10,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:38:10,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:38:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:38:10,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:38:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:38:10,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079316546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:38:10,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:38:10,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-01-28 14:38:10,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019736900] [2022-01-28 14:38:10,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:38:10,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 14:38:10,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:38:10,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 14:38:10,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:38:10,921 INFO L87 Difference]: Start difference. First operand 66000 states and 155929 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:11,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:38:11,214 INFO L93 Difference]: Finished difference Result 68385 states and 159843 transitions. [2022-01-28 14:38:11,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:38:11,215 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-28 14:38:11,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:38:11,635 INFO L225 Difference]: With dead ends: 68385 [2022-01-28 14:38:11,635 INFO L226 Difference]: Without dead ends: 68373 [2022-01-28 14:38:11,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-28 14:38:11,636 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 135 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:38:11,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 106 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:38:11,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68373 states. [2022-01-28 14:38:12,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68373 to 66000. [2022-01-28 14:38:12,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66000 states, 65999 states have (on average 2.3606721313959302) internal successors, (155802), 65999 states have internal predecessors, (155802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66000 states to 66000 states and 155802 transitions. [2022-01-28 14:38:12,893 INFO L78 Accepts]: Start accepts. Automaton has 66000 states and 155802 transitions. Word has length 35 [2022-01-28 14:38:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:38:12,893 INFO L470 AbstractCegarLoop]: Abstraction has 66000 states and 155802 transitions. [2022-01-28 14:38:12,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 66000 states and 155802 transitions. [2022-01-28 14:38:12,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-28 14:38:12,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:38:12,914 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:38:12,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-28 14:38:13,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-28 14:38:13,118 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:38:13,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:38:13,118 INFO L85 PathProgramCache]: Analyzing trace with hash 919304957, now seen corresponding path program 41 times [2022-01-28 14:38:13,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:38:13,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939440222] [2022-01-28 14:38:13,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:38:13,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:38:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:38:13,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:38:13,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939440222] [2022-01-28 14:38:13,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939440222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:38:13,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199505224] [2022-01-28 14:38:13,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:38:13,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:13,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:38:13,165 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:38:13,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-28 14:38:13,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:38:13,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:38:13,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:38:13,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:38:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:38:13,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:38:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:38:13,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199505224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:38:13,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:38:13,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-01-28 14:38:13,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462200187] [2022-01-28 14:38:13,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:38:13,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 14:38:13,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:38:13,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 14:38:13,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-28 14:38:13,313 INFO L87 Difference]: Start difference. First operand 66000 states and 155802 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:38:13,635 INFO L93 Difference]: Finished difference Result 68349 states and 159650 transitions. [2022-01-28 14:38:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:38:13,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-28 14:38:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:38:13,788 INFO L225 Difference]: With dead ends: 68349 [2022-01-28 14:38:13,788 INFO L226 Difference]: Without dead ends: 68326 [2022-01-28 14:38:13,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:38:13,790 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 117 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:38:13,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 124 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:38:13,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68326 states. [2022-01-28 14:38:14,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68326 to 66018. [2022-01-28 14:38:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66018 states, 66017 states have (on average 2.3601799536483026) internal successors, (155812), 66017 states have internal predecessors, (155812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66018 states to 66018 states and 155812 transitions. [2022-01-28 14:38:15,123 INFO L78 Accepts]: Start accepts. Automaton has 66018 states and 155812 transitions. Word has length 35 [2022-01-28 14:38:15,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:38:15,123 INFO L470 AbstractCegarLoop]: Abstraction has 66018 states and 155812 transitions. [2022-01-28 14:38:15,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:15,123 INFO L276 IsEmpty]: Start isEmpty. Operand 66018 states and 155812 transitions. [2022-01-28 14:38:15,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:38:15,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:38:15,150 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:38:15,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-28 14:38:15,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:15,354 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:38:15,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:38:15,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1808077410, now seen corresponding path program 42 times [2022-01-28 14:38:15,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:38:15,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027748420] [2022-01-28 14:38:15,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:38:15,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:38:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:38:15,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:38:15,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027748420] [2022-01-28 14:38:15,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027748420] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:38:15,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148626856] [2022-01-28 14:38:15,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:38:15,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:15,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:38:15,554 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:38:15,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-28 14:38:15,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:38:15,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:38:15,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:38:15,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:38:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:38:16,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:38:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:38:16,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148626856] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:38:16,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:38:16,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-28 14:38:16,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85896144] [2022-01-28 14:38:16,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:38:16,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:38:16,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:38:16,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:38:16,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:38:16,493 INFO L87 Difference]: Start difference. First operand 66018 states and 155812 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:18,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:38:18,999 INFO L93 Difference]: Finished difference Result 80160 states and 188249 transitions. [2022-01-28 14:38:18,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-28 14:38:18,999 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:38:19,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:38:19,180 INFO L225 Difference]: With dead ends: 80160 [2022-01-28 14:38:19,180 INFO L226 Difference]: Without dead ends: 80143 [2022-01-28 14:38:19,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=536, Invalid=5164, Unknown=0, NotChecked=0, Total=5700 [2022-01-28 14:38:19,180 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 470 mSDsluCounter, 2974 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 2724 SdHoareTripleChecker+Invalid, 2464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 14:38:19,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 2724 Invalid, 2464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2365 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 14:38:19,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80143 states. [2022-01-28 14:38:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80143 to 68227. [2022-01-28 14:38:20,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68227 states, 68226 states have (on average 2.3634538152610443) internal successors, (161249), 68226 states have internal predecessors, (161249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68227 states to 68227 states and 161249 transitions. [2022-01-28 14:38:20,447 INFO L78 Accepts]: Start accepts. Automaton has 68227 states and 161249 transitions. Word has length 38 [2022-01-28 14:38:20,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:38:20,448 INFO L470 AbstractCegarLoop]: Abstraction has 68227 states and 161249 transitions. [2022-01-28 14:38:20,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:20,448 INFO L276 IsEmpty]: Start isEmpty. Operand 68227 states and 161249 transitions. [2022-01-28 14:38:20,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:38:20,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:38:20,476 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:38:20,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-28 14:38:20,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-28 14:38:20,679 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:38:20,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:38:20,679 INFO L85 PathProgramCache]: Analyzing trace with hash 283993190, now seen corresponding path program 43 times [2022-01-28 14:38:20,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:38:20,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981917109] [2022-01-28 14:38:20,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:38:20,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:38:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:38:20,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:38:20,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981917109] [2022-01-28 14:38:20,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981917109] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:38:20,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648624690] [2022-01-28 14:38:20,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:38:20,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:20,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:38:20,873 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:38:20,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-28 14:38:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:20,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:38:20,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:38:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:38:21,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:38:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:38:21,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648624690] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:38:21,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:38:21,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-28 14:38:21,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070710429] [2022-01-28 14:38:21,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:38:21,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:38:21,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:38:21,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:38:21,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:38:21,782 INFO L87 Difference]: Start difference. First operand 68227 states and 161249 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:23,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:38:23,935 INFO L93 Difference]: Finished difference Result 78845 states and 185508 transitions. [2022-01-28 14:38:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-28 14:38:23,936 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:38:23,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:38:24,095 INFO L225 Difference]: With dead ends: 78845 [2022-01-28 14:38:24,095 INFO L226 Difference]: Without dead ends: 78828 [2022-01-28 14:38:24,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=557, Invalid=4845, Unknown=0, NotChecked=0, Total=5402 [2022-01-28 14:38:24,095 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 425 mSDsluCounter, 1831 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1778 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:38:24,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 1778 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:38:24,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78828 states. [2022-01-28 14:38:25,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78828 to 69484. [2022-01-28 14:38:25,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69484 states, 69483 states have (on average 2.3646359541182735) internal successors, (164302), 69483 states have internal predecessors, (164302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69484 states to 69484 states and 164302 transitions. [2022-01-28 14:38:25,420 INFO L78 Accepts]: Start accepts. Automaton has 69484 states and 164302 transitions. Word has length 38 [2022-01-28 14:38:25,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:38:25,420 INFO L470 AbstractCegarLoop]: Abstraction has 69484 states and 164302 transitions. [2022-01-28 14:38:25,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:25,420 INFO L276 IsEmpty]: Start isEmpty. Operand 69484 states and 164302 transitions. [2022-01-28 14:38:25,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:38:25,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:38:25,451 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:38:25,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-28 14:38:25,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-01-28 14:38:25,667 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:38:25,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:38:25,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2130240098, now seen corresponding path program 44 times [2022-01-28 14:38:25,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:38:25,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069854342] [2022-01-28 14:38:25,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:38:25,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:38:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:38:25,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:38:25,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069854342] [2022-01-28 14:38:25,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069854342] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:38:25,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252445928] [2022-01-28 14:38:25,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:38:25,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:25,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:38:25,818 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:38:25,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-28 14:38:25,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:38:25,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:38:25,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:38:25,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:38:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:38:26,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:38:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:38:26,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252445928] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:38:26,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:38:26,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-28 14:38:26,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333577572] [2022-01-28 14:38:26,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:38:26,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:38:26,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:38:26,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:38:26,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:38:26,510 INFO L87 Difference]: Start difference. First operand 69484 states and 164302 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:29,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:38:29,425 INFO L93 Difference]: Finished difference Result 80472 states and 189381 transitions. [2022-01-28 14:38:29,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-28 14:38:29,426 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:38:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:38:29,580 INFO L225 Difference]: With dead ends: 80472 [2022-01-28 14:38:29,580 INFO L226 Difference]: Without dead ends: 80455 [2022-01-28 14:38:29,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=798, Invalid=7758, Unknown=0, NotChecked=0, Total=8556 [2022-01-28 14:38:29,580 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 493 mSDsluCounter, 2473 mSDsCounter, 0 mSdLazyCounter, 1986 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 2387 SdHoareTripleChecker+Invalid, 2112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 14:38:29,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 2387 Invalid, 2112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1986 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 14:38:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80455 states. [2022-01-28 14:38:30,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80455 to 73196. [2022-01-28 14:38:30,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73196 states, 73195 states have (on average 2.3706127467723204) internal successors, (173517), 73195 states have internal predecessors, (173517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73196 states to 73196 states and 173517 transitions. [2022-01-28 14:38:30,961 INFO L78 Accepts]: Start accepts. Automaton has 73196 states and 173517 transitions. Word has length 38 [2022-01-28 14:38:30,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:38:30,961 INFO L470 AbstractCegarLoop]: Abstraction has 73196 states and 173517 transitions. [2022-01-28 14:38:30,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:30,961 INFO L276 IsEmpty]: Start isEmpty. Operand 73196 states and 173517 transitions. [2022-01-28 14:38:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:38:30,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:38:30,989 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:38:31,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-28 14:38:31,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:31,196 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:38:31,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:38:31,197 INFO L85 PathProgramCache]: Analyzing trace with hash 726839142, now seen corresponding path program 45 times [2022-01-28 14:38:31,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:38:31,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619320354] [2022-01-28 14:38:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:38:31,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:38:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:38:31,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:38:31,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619320354] [2022-01-28 14:38:31,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619320354] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:38:31,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897107382] [2022-01-28 14:38:31,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:38:31,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:31,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:38:31,420 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:38:31,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-28 14:38:31,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 14:38:31,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:38:31,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:38:31,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:38:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:38:31,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:38:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:38:32,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897107382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:38:32,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:38:32,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 33 [2022-01-28 14:38:32,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512013069] [2022-01-28 14:38:32,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:38:32,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-28 14:38:32,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:38:32,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-28 14:38:32,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:38:32,432 INFO L87 Difference]: Start difference. First operand 73196 states and 173517 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) [2022-01-28 14:38:38,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:38:38,634 INFO L93 Difference]: Finished difference Result 104966 states and 245995 transitions. [2022-01-28 14:38:38,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-01-28 14:38:38,635 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 38 [2022-01-28 14:38:38,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:38:38,928 INFO L225 Difference]: With dead ends: 104966 [2022-01-28 14:38:38,928 INFO L226 Difference]: Without dead ends: 104812 [2022-01-28 14:38:38,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9758 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2576, Invalid=26494, Unknown=0, NotChecked=0, Total=29070 [2022-01-28 14:38:38,929 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 885 mSDsluCounter, 3649 mSDsCounter, 0 mSdLazyCounter, 3264 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 3414 SdHoareTripleChecker+Invalid, 3510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 3264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:38:38,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 3414 Invalid, 3510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 3264 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-28 14:38:39,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104812 states. [2022-01-28 14:38:40,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104812 to 80383. [2022-01-28 14:38:40,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80383 states, 80382 states have (on average 2.3753949889278694) internal successors, (190939), 80382 states have internal predecessors, (190939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80383 states to 80383 states and 190939 transitions. [2022-01-28 14:38:40,820 INFO L78 Accepts]: Start accepts. Automaton has 80383 states and 190939 transitions. Word has length 38 [2022-01-28 14:38:40,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:38:40,820 INFO L470 AbstractCegarLoop]: Abstraction has 80383 states and 190939 transitions. [2022-01-28 14:38:40,821 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) [2022-01-28 14:38:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 80383 states and 190939 transitions. [2022-01-28 14:38:40,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:38:40,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:38:40,853 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:38:40,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-28 14:38:41,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-28 14:38:41,071 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:38:41,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:38:41,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1924591970, now seen corresponding path program 46 times [2022-01-28 14:38:41,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:38:41,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272816382] [2022-01-28 14:38:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:38:41,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:38:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:38:41,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:38:41,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272816382] [2022-01-28 14:38:41,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272816382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:38:41,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474470494] [2022-01-28 14:38:41,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:38:41,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:41,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:38:41,252 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:38:41,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-28 14:38:41,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:38:41,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:38:41,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:38:41,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:38:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:38:41,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:38:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:38:41,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474470494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:38:41,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:38:41,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-28 14:38:41,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284673562] [2022-01-28 14:38:41,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:38:41,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:38:41,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:38:41,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:38:41,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:38:41,892 INFO L87 Difference]: Start difference. First operand 80383 states and 190939 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:38:44,705 INFO L93 Difference]: Finished difference Result 97594 states and 230104 transitions. [2022-01-28 14:38:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-28 14:38:44,705 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:38:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:38:45,113 INFO L225 Difference]: With dead ends: 97594 [2022-01-28 14:38:45,113 INFO L226 Difference]: Without dead ends: 97527 [2022-01-28 14:38:45,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=611, Invalid=6195, Unknown=0, NotChecked=0, Total=6806 [2022-01-28 14:38:45,114 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 371 mSDsluCounter, 2922 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 2779 SdHoareTripleChecker+Invalid, 2120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:38:45,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 2779 Invalid, 2120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-28 14:38:45,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97527 states. [2022-01-28 14:38:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97527 to 84100. [2022-01-28 14:38:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84100 states, 84099 states have (on average 2.3742375057967395) internal successors, (199671), 84099 states have internal predecessors, (199671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84100 states to 84100 states and 199671 transitions. [2022-01-28 14:38:46,728 INFO L78 Accepts]: Start accepts. Automaton has 84100 states and 199671 transitions. Word has length 38 [2022-01-28 14:38:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:38:46,728 INFO L470 AbstractCegarLoop]: Abstraction has 84100 states and 199671 transitions. [2022-01-28 14:38:46,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 84100 states and 199671 transitions. [2022-01-28 14:38:46,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:38:46,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:38:47,002 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:38:47,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-28 14:38:47,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-28 14:38:47,203 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:38:47,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:38:47,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1690483302, now seen corresponding path program 47 times [2022-01-28 14:38:47,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:38:47,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981652621] [2022-01-28 14:38:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:38:47,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:38:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:38:47,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:38:47,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981652621] [2022-01-28 14:38:47,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981652621] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:38:47,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214833407] [2022-01-28 14:38:47,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:38:47,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:47,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:38:47,381 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:38:47,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-28 14:38:47,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-28 14:38:47,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:38:47,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:38:47,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:38:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:38:47,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:38:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:38:47,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214833407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:38:47,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:38:47,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-28 14:38:47,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273300322] [2022-01-28 14:38:47,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:38:47,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 14:38:47,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:38:47,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 14:38:47,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:38:47,926 INFO L87 Difference]: Start difference. First operand 84100 states and 199671 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:38:50,236 INFO L93 Difference]: Finished difference Result 105315 states and 248410 transitions. [2022-01-28 14:38:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-28 14:38:50,236 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:38:50,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:38:50,537 INFO L225 Difference]: With dead ends: 105315 [2022-01-28 14:38:50,538 INFO L226 Difference]: Without dead ends: 105242 [2022-01-28 14:38:50,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=656, Invalid=7000, Unknown=0, NotChecked=0, Total=7656 [2022-01-28 14:38:50,538 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 446 mSDsluCounter, 2951 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 2833 SdHoareTripleChecker+Invalid, 2291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:38:50,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 2833 Invalid, 2291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2166 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:38:50,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105242 states. [2022-01-28 14:38:52,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105242 to 89668. [2022-01-28 14:38:52,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89668 states, 89667 states have (on average 2.3797383652848874) internal successors, (213384), 89667 states have internal predecessors, (213384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:52,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89668 states to 89668 states and 213384 transitions. [2022-01-28 14:38:52,600 INFO L78 Accepts]: Start accepts. Automaton has 89668 states and 213384 transitions. Word has length 38 [2022-01-28 14:38:52,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:38:52,600 INFO L470 AbstractCegarLoop]: Abstraction has 89668 states and 213384 transitions. [2022-01-28 14:38:52,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:52,600 INFO L276 IsEmpty]: Start isEmpty. Operand 89668 states and 213384 transitions. [2022-01-28 14:38:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:38:52,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:38:52,653 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:38:52,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-28 14:38:52,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:52,855 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:38:52,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:38:52,856 INFO L85 PathProgramCache]: Analyzing trace with hash -100519944, now seen corresponding path program 48 times [2022-01-28 14:38:52,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:38:52,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665871991] [2022-01-28 14:38:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:38:52,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:38:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:38:53,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:38:53,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665871991] [2022-01-28 14:38:53,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665871991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:38:53,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428998374] [2022-01-28 14:38:53,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:38:53,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:53,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:38:53,026 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:38:53,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-28 14:38:53,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-28 14:38:53,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:38:53,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:38:53,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:38:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:38:53,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:38:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:38:53,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428998374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:38:53,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:38:53,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-28 14:38:53,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767209141] [2022-01-28 14:38:53,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:38:53,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:38:53,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:38:53,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:38:53,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:38:53,963 INFO L87 Difference]: Start difference. First operand 89668 states and 213384 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:56,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:38:56,470 INFO L93 Difference]: Finished difference Result 105589 states and 250362 transitions. [2022-01-28 14:38:56,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-28 14:38:56,471 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:38:56,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:38:56,761 INFO L225 Difference]: With dead ends: 105589 [2022-01-28 14:38:56,761 INFO L226 Difference]: Without dead ends: 105572 [2022-01-28 14:38:56,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=650, Invalid=6156, Unknown=0, NotChecked=0, Total=6806 [2022-01-28 14:38:56,762 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 461 mSDsluCounter, 2124 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1995 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:38:56,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 1995 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:38:56,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105572 states. [2022-01-28 14:38:58,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105572 to 92721. [2022-01-28 14:38:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92721 states, 92720 states have (on average 2.3839516824849007) internal successors, (221040), 92720 states have internal predecessors, (221040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:58,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92721 states to 92721 states and 221040 transitions. [2022-01-28 14:38:58,856 INFO L78 Accepts]: Start accepts. Automaton has 92721 states and 221040 transitions. Word has length 38 [2022-01-28 14:38:58,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:38:58,856 INFO L470 AbstractCegarLoop]: Abstraction has 92721 states and 221040 transitions. [2022-01-28 14:38:58,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:58,856 INFO L276 IsEmpty]: Start isEmpty. Operand 92721 states and 221040 transitions. [2022-01-28 14:38:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:38:58,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:38:58,896 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:38:58,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-28 14:38:59,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:59,099 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:38:59,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:38:59,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1095467792, now seen corresponding path program 49 times [2022-01-28 14:38:59,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:38:59,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164187458] [2022-01-28 14:38:59,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:38:59,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:38:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:38:59,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:38:59,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164187458] [2022-01-28 14:38:59,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164187458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:38:59,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674207141] [2022-01-28 14:38:59,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:38:59,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:59,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:38:59,341 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:38:59,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-28 14:38:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:59,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:38:59,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:38:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:38:59,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:39:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:39:00,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674207141] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:39:00,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:39:00,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-28 14:39:00,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457216126] [2022-01-28 14:39:00,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:39:00,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:39:00,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:39:00,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:39:00,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:39:00,032 INFO L87 Difference]: Start difference. First operand 92721 states and 221040 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:02,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:39:02,160 INFO L93 Difference]: Finished difference Result 105951 states and 251639 transitions. [2022-01-28 14:39:02,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-28 14:39:02,161 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:39:02,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:39:02,681 INFO L225 Difference]: With dead ends: 105951 [2022-01-28 14:39:02,681 INFO L226 Difference]: Without dead ends: 105934 [2022-01-28 14:39:02,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=382, Invalid=3524, Unknown=0, NotChecked=0, Total=3906 [2022-01-28 14:39:02,682 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 302 mSDsluCounter, 2233 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 2131 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:39:02,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 2131 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:39:02,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105934 states. [2022-01-28 14:39:04,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105934 to 94088. [2022-01-28 14:39:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94088 states, 94087 states have (on average 2.384527086632585) internal successors, (224353), 94087 states have internal predecessors, (224353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:04,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94088 states to 94088 states and 224353 transitions. [2022-01-28 14:39:04,779 INFO L78 Accepts]: Start accepts. Automaton has 94088 states and 224353 transitions. Word has length 38 [2022-01-28 14:39:04,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:39:04,779 INFO L470 AbstractCegarLoop]: Abstraction has 94088 states and 224353 transitions. [2022-01-28 14:39:04,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:04,779 INFO L276 IsEmpty]: Start isEmpty. Operand 94088 states and 224353 transitions. [2022-01-28 14:39:04,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:39:04,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:39:04,816 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:39:04,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-28 14:39:05,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:39:05,031 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:39:05,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:39:05,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1318765496, now seen corresponding path program 50 times [2022-01-28 14:39:05,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:39:05,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750884295] [2022-01-28 14:39:05,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:39:05,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:39:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:39:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:05,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:39:05,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750884295] [2022-01-28 14:39:05,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750884295] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:39:05,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284828724] [2022-01-28 14:39:05,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:39:05,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:39:05,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:39:05,207 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:39:05,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-28 14:39:05,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:39:05,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:39:05,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:39:05,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:39:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:39:05,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:39:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:39:05,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284828724] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:39:05,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:39:05,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-28 14:39:05,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753605718] [2022-01-28 14:39:05,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:39:05,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:39:05,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:39:05,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:39:05,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:39:05,849 INFO L87 Difference]: Start difference. First operand 94088 states and 224353 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:08,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:39:08,681 INFO L93 Difference]: Finished difference Result 104357 states and 247663 transitions. [2022-01-28 14:39:08,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-28 14:39:08,682 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:39:08,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:39:08,952 INFO L225 Difference]: With dead ends: 104357 [2022-01-28 14:39:08,952 INFO L226 Difference]: Without dead ends: 104340 [2022-01-28 14:39:08,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=590, Invalid=6052, Unknown=0, NotChecked=0, Total=6642 [2022-01-28 14:39:08,954 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 354 mSDsluCounter, 2247 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 2185 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 14:39:08,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 2185 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1679 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 14:39:09,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104340 states. [2022-01-28 14:39:10,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104340 to 96779. [2022-01-28 14:39:10,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96779 states, 96778 states have (on average 2.3871231064911447) internal successors, (231021), 96778 states have internal predecessors, (231021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96779 states to 96779 states and 231021 transitions. [2022-01-28 14:39:11,220 INFO L78 Accepts]: Start accepts. Automaton has 96779 states and 231021 transitions. Word has length 38 [2022-01-28 14:39:11,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:39:11,220 INFO L470 AbstractCegarLoop]: Abstraction has 96779 states and 231021 transitions. [2022-01-28 14:39:11,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:11,220 INFO L276 IsEmpty]: Start isEmpty. Operand 96779 states and 231021 transitions. [2022-01-28 14:39:11,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:39:11,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:39:11,263 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:39:11,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-28 14:39:11,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-28 14:39:11,472 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:39:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:39:11,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1793009392, now seen corresponding path program 51 times [2022-01-28 14:39:11,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:39:11,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061910976] [2022-01-28 14:39:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:39:11,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:39:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:39:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:11,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:39:11,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061910976] [2022-01-28 14:39:11,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061910976] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:39:11,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088565373] [2022-01-28 14:39:11,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:39:11,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:39:11,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:39:11,644 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:39:11,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-28 14:39:11,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-28 14:39:11,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:39:11,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:39:11,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:39:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:39:11,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:39:12,302 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:39:12,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088565373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:39:12,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:39:12,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2022-01-28 14:39:12,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757936834] [2022-01-28 14:39:12,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:39:12,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-28 14:39:12,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:39:12,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-28 14:39:12,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:39:12,303 INFO L87 Difference]: Start difference. First operand 96779 states and 231021 transitions. Second operand has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 34 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) [2022-01-28 14:39:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:39:20,929 INFO L93 Difference]: Finished difference Result 247727 states and 589278 transitions. [2022-01-28 14:39:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-01-28 14:39:20,929 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 34 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 38 [2022-01-28 14:39:20,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:39:21,714 INFO L225 Difference]: With dead ends: 247727 [2022-01-28 14:39:21,714 INFO L226 Difference]: Without dead ends: 247520 [2022-01-28 14:39:21,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14609 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=3852, Invalid=37968, Unknown=0, NotChecked=0, Total=41820 [2022-01-28 14:39:21,716 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 840 mSDsluCounter, 5338 mSDsCounter, 0 mSdLazyCounter, 4552 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 5091 SdHoareTripleChecker+Invalid, 4823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 4552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:39:21,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 5091 Invalid, 4823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 4552 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-28 14:39:21,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247520 states. [2022-01-28 14:39:26,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247520 to 197497. [2022-01-28 14:39:26,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197497 states, 197496 states have (on average 2.411436180985944) internal successors, (476249), 197496 states have internal predecessors, (476249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:27,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197497 states to 197497 states and 476249 transitions. [2022-01-28 14:39:27,123 INFO L78 Accepts]: Start accepts. Automaton has 197497 states and 476249 transitions. Word has length 38 [2022-01-28 14:39:27,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:39:27,123 INFO L470 AbstractCegarLoop]: Abstraction has 197497 states and 476249 transitions. [2022-01-28 14:39:27,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 34 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) [2022-01-28 14:39:27,123 INFO L276 IsEmpty]: Start isEmpty. Operand 197497 states and 476249 transitions. [2022-01-28 14:39:27,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:39:27,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:39:27,585 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:39:27,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-28 14:39:27,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-01-28 14:39:27,799 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:39:27,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:39:27,800 INFO L85 PathProgramCache]: Analyzing trace with hash 710954658, now seen corresponding path program 52 times [2022-01-28 14:39:27,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:39:27,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358311578] [2022-01-28 14:39:27,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:39:27,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:39:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:39:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:28,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:39:28,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358311578] [2022-01-28 14:39:28,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358311578] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:39:28,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565870614] [2022-01-28 14:39:28,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:39:28,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:39:28,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:39:28,021 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:39:28,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-28 14:39:28,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:39:28,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:39:28,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:39:28,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:39:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:39:28,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:39:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:39:28,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565870614] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:39:28,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:39:28,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-28 14:39:28,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738574973] [2022-01-28 14:39:28,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:39:28,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:39:28,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:39:28,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:39:28,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:39:28,720 INFO L87 Difference]: Start difference. First operand 197497 states and 476249 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:31,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:39:31,713 INFO L93 Difference]: Finished difference Result 222369 states and 534084 transitions. [2022-01-28 14:39:31,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-28 14:39:31,713 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:39:31,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:39:32,936 INFO L225 Difference]: With dead ends: 222369 [2022-01-28 14:39:32,936 INFO L226 Difference]: Without dead ends: 222352 [2022-01-28 14:39:32,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=434, Invalid=4258, Unknown=0, NotChecked=0, Total=4692 [2022-01-28 14:39:32,936 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 380 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1912 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:39:32,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 1912 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 14:39:33,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222352 states. [2022-01-28 14:39:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222352 to 199729. [2022-01-28 14:39:37,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199729 states, 199728 states have (on average 2.412170551950653) internal successors, (481778), 199728 states have internal predecessors, (481778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:38,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199729 states to 199729 states and 481778 transitions. [2022-01-28 14:39:38,214 INFO L78 Accepts]: Start accepts. Automaton has 199729 states and 481778 transitions. Word has length 38 [2022-01-28 14:39:38,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:39:38,214 INFO L470 AbstractCegarLoop]: Abstraction has 199729 states and 481778 transitions. [2022-01-28 14:39:38,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:38,214 INFO L276 IsEmpty]: Start isEmpty. Operand 199729 states and 481778 transitions. [2022-01-28 14:39:38,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:39:38,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:39:38,264 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:39:38,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-28 14:39:38,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-01-28 14:39:38,480 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:39:38,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:39:38,481 INFO L85 PathProgramCache]: Analyzing trace with hash 432482470, now seen corresponding path program 53 times [2022-01-28 14:39:38,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:39:38,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872316241] [2022-01-28 14:39:38,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:39:38,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:39:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:39:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:38,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:39:38,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872316241] [2022-01-28 14:39:38,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872316241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:39:38,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968342111] [2022-01-28 14:39:38,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:39:38,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:39:38,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:39:38,685 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:39:38,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-28 14:39:38,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-28 14:39:38,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:39:38,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:39:38,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:39:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:39:39,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:39:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:39:39,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968342111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:39:39,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:39:39,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-28 14:39:39,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931350774] [2022-01-28 14:39:39,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:39:39,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-28 14:39:39,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:39:39,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-28 14:39:39,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 14:39:39,623 INFO L87 Difference]: Start difference. First operand 199729 states and 481778 transitions. Second operand has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:39:44,380 INFO L93 Difference]: Finished difference Result 250125 states and 598297 transitions. [2022-01-28 14:39:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-28 14:39:44,381 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:39:44,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:39:45,441 INFO L225 Difference]: With dead ends: 250125 [2022-01-28 14:39:45,441 INFO L226 Difference]: Without dead ends: 249693 [2022-01-28 14:39:45,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2933 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1466, Invalid=9664, Unknown=0, NotChecked=0, Total=11130 [2022-01-28 14:39:45,442 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 719 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 2679 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 2847 SdHoareTripleChecker+Invalid, 2897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:39:45,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 2847 Invalid, 2897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2679 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-28 14:39:45,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249693 states. [2022-01-28 14:39:49,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249693 to 204883. [2022-01-28 14:39:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204883 states, 204882 states have (on average 2.410118995324138) internal successors, (493790), 204882 states have internal predecessors, (493790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:51,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204883 states to 204883 states and 493790 transitions. [2022-01-28 14:39:51,089 INFO L78 Accepts]: Start accepts. Automaton has 204883 states and 493790 transitions. Word has length 38 [2022-01-28 14:39:51,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:39:51,089 INFO L470 AbstractCegarLoop]: Abstraction has 204883 states and 493790 transitions. [2022-01-28 14:39:51,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:51,089 INFO L276 IsEmpty]: Start isEmpty. Operand 204883 states and 493790 transitions. [2022-01-28 14:39:51,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:39:51,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:39:51,147 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:39:51,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-28 14:39:51,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:39:51,361 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:39:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:39:51,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1005405586, now seen corresponding path program 54 times [2022-01-28 14:39:51,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:39:51,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336953568] [2022-01-28 14:39:51,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:39:51,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:39:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:39:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:51,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:39:51,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336953568] [2022-01-28 14:39:51,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336953568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:39:51,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223461126] [2022-01-28 14:39:51,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:39:51,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:39:51,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:39:51,592 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:39:51,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-28 14:39:51,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:39:51,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:39:51,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:39:51,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:39:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:39:51,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:39:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:39:52,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223461126] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:39:52,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:39:52,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-28 14:39:52,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319748620] [2022-01-28 14:39:52,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:39:52,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:39:52,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:39:52,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:39:52,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:39:52,612 INFO L87 Difference]: Start difference. First operand 204883 states and 493790 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:55,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:39:55,332 INFO L93 Difference]: Finished difference Result 217189 states and 522887 transitions. [2022-01-28 14:39:55,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-28 14:39:55,332 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:39:55,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:39:56,321 INFO L225 Difference]: With dead ends: 217189 [2022-01-28 14:39:56,321 INFO L226 Difference]: Without dead ends: 217155 [2022-01-28 14:39:56,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=475, Invalid=4637, Unknown=0, NotChecked=0, Total=5112 [2022-01-28 14:39:56,322 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 315 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:39:56,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1564 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:39:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217155 states. [2022-01-28 14:40:00,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217155 to 205752. [2022-01-28 14:40:00,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205752 states, 205751 states have (on average 2.4099761362034693) internal successors, (495855), 205751 states have internal predecessors, (495855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205752 states to 205752 states and 495855 transitions. [2022-01-28 14:40:01,378 INFO L78 Accepts]: Start accepts. Automaton has 205752 states and 495855 transitions. Word has length 38 [2022-01-28 14:40:01,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:40:01,378 INFO L470 AbstractCegarLoop]: Abstraction has 205752 states and 495855 transitions. [2022-01-28 14:40:01,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:01,378 INFO L276 IsEmpty]: Start isEmpty. Operand 205752 states and 495855 transitions. [2022-01-28 14:40:01,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:40:01,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:40:01,864 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:40:01,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-28 14:40:02,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:40:02,065 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:40:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:40:02,065 INFO L85 PathProgramCache]: Analyzing trace with hash -41761426, now seen corresponding path program 55 times [2022-01-28 14:40:02,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:40:02,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762624064] [2022-01-28 14:40:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:40:02,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:40:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:40:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:02,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:40:02,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762624064] [2022-01-28 14:40:02,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762624064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:40:02,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589355853] [2022-01-28 14:40:02,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:40:02,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:40:02,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:40:02,236 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:40:02,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-28 14:40:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:40:02,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:40:02,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:40:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:40:02,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:40:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:40:02,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589355853] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:40:02,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:40:02,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-28 14:40:02,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854468149] [2022-01-28 14:40:02,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:40:02,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 14:40:02,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:40:02,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 14:40:02,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:40:02,837 INFO L87 Difference]: Start difference. First operand 205752 states and 495855 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:05,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:40:05,937 INFO L93 Difference]: Finished difference Result 243037 states and 582553 transitions. [2022-01-28 14:40:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-28 14:40:05,950 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:40:05,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:40:06,695 INFO L225 Difference]: With dead ends: 243037 [2022-01-28 14:40:06,695 INFO L226 Difference]: Without dead ends: 242968 [2022-01-28 14:40:06,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=452, Invalid=4660, Unknown=0, NotChecked=0, Total=5112 [2022-01-28 14:40:06,696 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 374 mSDsluCounter, 2410 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 2133 SdHoareTripleChecker+Invalid, 2258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 14:40:06,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 2133 Invalid, 2258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2150 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 14:40:06,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242968 states. [2022-01-28 14:40:11,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242968 to 214523. [2022-01-28 14:40:11,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214523 states, 214522 states have (on average 2.411393703209927) internal successors, (517297), 214522 states have internal predecessors, (517297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214523 states to 214523 states and 517297 transitions. [2022-01-28 14:40:12,356 INFO L78 Accepts]: Start accepts. Automaton has 214523 states and 517297 transitions. Word has length 38 [2022-01-28 14:40:12,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:40:12,356 INFO L470 AbstractCegarLoop]: Abstraction has 214523 states and 517297 transitions. [2022-01-28 14:40:12,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:12,356 INFO L276 IsEmpty]: Start isEmpty. Operand 214523 states and 517297 transitions. [2022-01-28 14:40:12,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:40:12,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:40:12,855 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:40:12,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-28 14:40:13,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-28 14:40:13,060 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:40:13,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:40:13,060 INFO L85 PathProgramCache]: Analyzing trace with hash 253122132, now seen corresponding path program 56 times [2022-01-28 14:40:13,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:40:13,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396866358] [2022-01-28 14:40:13,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:40:13,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:40:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:40:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:13,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:40:13,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396866358] [2022-01-28 14:40:13,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396866358] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:40:13,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543410632] [2022-01-28 14:40:13,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:40:13,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:40:13,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:40:13,279 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:40:13,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-28 14:40:13,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:40:13,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:40:13,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:40:13,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:40:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:40:13,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:40:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:40:13,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543410632] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:40:13,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:40:13,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-28 14:40:13,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787496758] [2022-01-28 14:40:13,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:40:13,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:40:13,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:40:13,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:40:13,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:40:13,986 INFO L87 Difference]: Start difference. First operand 214523 states and 517297 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:40:16,265 INFO L93 Difference]: Finished difference Result 238695 states and 573579 transitions. [2022-01-28 14:40:16,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-28 14:40:16,265 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:40:16,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:40:17,620 INFO L225 Difference]: With dead ends: 238695 [2022-01-28 14:40:17,620 INFO L226 Difference]: Without dead ends: 238678 [2022-01-28 14:40:17,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=268, Invalid=2702, Unknown=0, NotChecked=0, Total=2970 [2022-01-28 14:40:17,626 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 210 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:40:17,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1664 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:40:17,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238678 states. [2022-01-28 14:40:22,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238678 to 214859. [2022-01-28 14:40:22,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214859 states, 214858 states have (on average 2.4113879864840966) internal successors, (518106), 214858 states have internal predecessors, (518106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:23,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214859 states to 214859 states and 518106 transitions. [2022-01-28 14:40:23,469 INFO L78 Accepts]: Start accepts. Automaton has 214859 states and 518106 transitions. Word has length 38 [2022-01-28 14:40:23,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:40:23,469 INFO L470 AbstractCegarLoop]: Abstraction has 214859 states and 518106 transitions. [2022-01-28 14:40:23,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:23,469 INFO L276 IsEmpty]: Start isEmpty. Operand 214859 states and 518106 transitions. [2022-01-28 14:40:23,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:40:23,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:40:23,520 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:40:23,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-01-28 14:40:23,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-28 14:40:23,735 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:40:23,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:40:23,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1725520592, now seen corresponding path program 57 times [2022-01-28 14:40:23,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:40:23,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506667017] [2022-01-28 14:40:23,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:40:23,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:40:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:40:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:23,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:40:23,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506667017] [2022-01-28 14:40:23,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506667017] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:40:23,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052605459] [2022-01-28 14:40:23,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:40:23,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:40:23,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:40:23,963 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:40:23,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-28 14:40:23,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:40:23,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:40:23,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:40:24,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:40:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:40:24,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:40:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:40:25,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052605459] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:40:25,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:40:25,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-28 14:40:25,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411731921] [2022-01-28 14:40:25,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:40:25,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:40:25,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:40:25,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:40:25,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:40:25,002 INFO L87 Difference]: Start difference. First operand 214859 states and 518106 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:27,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:40:27,550 INFO L93 Difference]: Finished difference Result 219835 states and 529343 transitions. [2022-01-28 14:40:27,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-28 14:40:27,550 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:40:27,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:40:28,573 INFO L225 Difference]: With dead ends: 219835 [2022-01-28 14:40:28,573 INFO L226 Difference]: Without dead ends: 219791 [2022-01-28 14:40:28,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=535, Invalid=5015, Unknown=0, NotChecked=0, Total=5550 [2022-01-28 14:40:28,575 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 391 mSDsluCounter, 2352 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 2059 SdHoareTripleChecker+Invalid, 2054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:40:28,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 2059 Invalid, 2054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 14:40:28,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219791 states. [2022-01-28 14:40:32,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219791 to 216583. [2022-01-28 14:40:32,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216583 states, 216582 states have (on average 2.4118116925690964) internal successors, (522355), 216582 states have internal predecessors, (522355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216583 states to 216583 states and 522355 transitions. [2022-01-28 14:40:34,089 INFO L78 Accepts]: Start accepts. Automaton has 216583 states and 522355 transitions. Word has length 38 [2022-01-28 14:40:34,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:40:34,089 INFO L470 AbstractCegarLoop]: Abstraction has 216583 states and 522355 transitions. [2022-01-28 14:40:34,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:34,089 INFO L276 IsEmpty]: Start isEmpty. Operand 216583 states and 522355 transitions. [2022-01-28 14:40:34,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:40:34,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:40:34,144 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:40:34,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-28 14:40:34,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:40:34,363 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:40:34,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:40:34,363 INFO L85 PathProgramCache]: Analyzing trace with hash -925910520, now seen corresponding path program 58 times [2022-01-28 14:40:34,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:40:34,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405836912] [2022-01-28 14:40:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:40:34,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:40:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:40:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:34,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:40:34,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405836912] [2022-01-28 14:40:34,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405836912] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:40:34,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274856650] [2022-01-28 14:40:34,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:40:34,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:40:34,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:40:34,532 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:40:34,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-28 14:40:34,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:40:34,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:40:34,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:40:34,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:40:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:40:34,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:40:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:40:35,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274856650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:40:35,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:40:35,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-28 14:40:35,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090131818] [2022-01-28 14:40:35,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:40:35,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:40:35,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:40:35,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:40:35,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:40:35,219 INFO L87 Difference]: Start difference. First operand 216583 states and 522355 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:38,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:40:38,331 INFO L93 Difference]: Finished difference Result 221841 states and 533914 transitions. [2022-01-28 14:40:38,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-28 14:40:38,332 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:40:38,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:40:38,955 INFO L225 Difference]: With dead ends: 221841 [2022-01-28 14:40:38,955 INFO L226 Difference]: Without dead ends: 221758 [2022-01-28 14:40:38,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=485, Invalid=4485, Unknown=0, NotChecked=0, Total=4970 [2022-01-28 14:40:38,956 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 401 mSDsluCounter, 2194 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:40:38,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 1989 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 14:40:39,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221758 states. [2022-01-28 14:40:43,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221758 to 219330. [2022-01-28 14:40:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219330 states, 219329 states have (on average 2.410378928459073) internal successors, (528666), 219329 states have internal predecessors, (528666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219330 states to 219330 states and 528666 transitions. [2022-01-28 14:40:45,035 INFO L78 Accepts]: Start accepts. Automaton has 219330 states and 528666 transitions. Word has length 38 [2022-01-28 14:40:45,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:40:45,035 INFO L470 AbstractCegarLoop]: Abstraction has 219330 states and 528666 transitions. [2022-01-28 14:40:45,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 219330 states and 528666 transitions. [2022-01-28 14:40:45,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:40:45,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:40:45,095 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:40:45,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-28 14:40:45,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-28 14:40:45,312 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:40:45,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:40:45,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1421707574, now seen corresponding path program 59 times [2022-01-28 14:40:45,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:40:45,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556779382] [2022-01-28 14:40:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:40:45,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:40:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:40:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:45,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:40:45,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556779382] [2022-01-28 14:40:45,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556779382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:40:45,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314099245] [2022-01-28 14:40:45,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:40:45,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:40:45,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:40:45,473 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:40:45,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-28 14:40:45,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-28 14:40:45,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:40:45,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:40:45,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:40:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:40:45,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:40:46,130 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:40:46,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314099245] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:40:46,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:40:46,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-28 14:40:46,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259740412] [2022-01-28 14:40:46,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:40:46,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 14:40:46,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:40:46,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 14:40:46,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:40:46,132 INFO L87 Difference]: Start difference. First operand 219330 states and 528666 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:48,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:40:48,921 INFO L93 Difference]: Finished difference Result 226504 states and 544989 transitions. [2022-01-28 14:40:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-28 14:40:48,921 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:40:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:40:49,721 INFO L225 Difference]: With dead ends: 226504 [2022-01-28 14:40:49,721 INFO L226 Difference]: Without dead ends: 226451 [2022-01-28 14:40:49,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=491, Invalid=4201, Unknown=0, NotChecked=0, Total=4692 [2022-01-28 14:40:49,722 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 395 mSDsluCounter, 1971 mSDsCounter, 0 mSdLazyCounter, 1911 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 1723 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:40:49,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 1723 Invalid, 2007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1911 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:40:49,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226451 states. [2022-01-28 14:40:53,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226451 to 223614. [2022-01-28 14:40:54,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223614 states, 223613 states have (on average 2.409850947842925) internal successors, (538874), 223613 states have internal predecessors, (538874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223614 states to 223614 states and 538874 transitions. [2022-01-28 14:40:55,961 INFO L78 Accepts]: Start accepts. Automaton has 223614 states and 538874 transitions. Word has length 38 [2022-01-28 14:40:55,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:40:55,961 INFO L470 AbstractCegarLoop]: Abstraction has 223614 states and 538874 transitions. [2022-01-28 14:40:55,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:55,962 INFO L276 IsEmpty]: Start isEmpty. Operand 223614 states and 538874 transitions. [2022-01-28 14:40:56,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:40:56,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:40:56,017 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:40:56,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-01-28 14:40:56,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-28 14:40:56,231 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:40:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:40:56,232 INFO L85 PathProgramCache]: Analyzing trace with hash -198181364, now seen corresponding path program 60 times [2022-01-28 14:40:56,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:40:56,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033369899] [2022-01-28 14:40:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:40:56,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:40:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:40:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:56,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:40:56,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033369899] [2022-01-28 14:40:56,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033369899] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:40:56,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070830051] [2022-01-28 14:40:56,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:40:56,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:40:56,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:40:56,487 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:40:56,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-28 14:40:56,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:40:56,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:40:56,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:40:56,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:40:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:40:56,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:40:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:40:57,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070830051] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:40:57,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:40:57,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-28 14:40:57,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430432411] [2022-01-28 14:40:57,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:40:57,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 14:40:57,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:40:57,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 14:40:57,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:40:57,205 INFO L87 Difference]: Start difference. First operand 223614 states and 538874 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:00,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:41:00,273 INFO L93 Difference]: Finished difference Result 240724 states and 577550 transitions. [2022-01-28 14:41:00,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-28 14:41:00,274 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:41:00,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:41:01,378 INFO L225 Difference]: With dead ends: 240724 [2022-01-28 14:41:01,379 INFO L226 Difference]: Without dead ends: 240666 [2022-01-28 14:41:01,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=321, Invalid=2871, Unknown=0, NotChecked=0, Total=3192 [2022-01-28 14:41:01,391 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 322 mSDsluCounter, 2611 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 2362 SdHoareTripleChecker+Invalid, 2149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 14:41:01,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 2362 Invalid, 2149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 14:41:01,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240666 states. [2022-01-28 14:41:05,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240666 to 225813. [2022-01-28 14:41:06,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225813 states, 225812 states have (on average 2.4096505057304305) internal successors, (544128), 225812 states have internal predecessors, (544128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:07,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225813 states to 225813 states and 544128 transitions. [2022-01-28 14:41:07,425 INFO L78 Accepts]: Start accepts. Automaton has 225813 states and 544128 transitions. Word has length 38 [2022-01-28 14:41:07,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:41:07,425 INFO L470 AbstractCegarLoop]: Abstraction has 225813 states and 544128 transitions. [2022-01-28 14:41:07,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 225813 states and 544128 transitions. [2022-01-28 14:41:07,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:41:07,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:41:07,485 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:41:07,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-28 14:41:07,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-28 14:41:07,702 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:41:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:41:07,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1452833468, now seen corresponding path program 61 times [2022-01-28 14:41:07,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:41:07,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023468349] [2022-01-28 14:41:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:41:07,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:41:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:41:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:07,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:41:07,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023468349] [2022-01-28 14:41:07,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023468349] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:41:07,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27351629] [2022-01-28 14:41:07,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:41:07,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:41:07,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:41:07,904 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:41:07,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-28 14:41:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:41:07,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:41:07,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:41:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:41:08,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:41:08,583 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:41:08,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27351629] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:41:08,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:41:08,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-01-28 14:41:08,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394054820] [2022-01-28 14:41:08,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:41:08,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 14:41:08,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:41:08,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 14:41:08,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:41:08,585 INFO L87 Difference]: Start difference. First operand 225813 states and 544128 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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) [2022-01-28 14:41:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:41:11,678 INFO L93 Difference]: Finished difference Result 253210 states and 606499 transitions. [2022-01-28 14:41:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-28 14:41:11,678 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 38 [2022-01-28 14:41:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:41:12,811 INFO L225 Difference]: With dead ends: 253210 [2022-01-28 14:41:12,811 INFO L226 Difference]: Without dead ends: 253105 [2022-01-28 14:41:12,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=402, Invalid=3630, Unknown=0, NotChecked=0, Total=4032 [2022-01-28 14:41:12,811 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 386 mSDsluCounter, 2418 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 2142 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:41:12,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 2142 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2088 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-28 14:41:13,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253105 states. [2022-01-28 14:41:17,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253105 to 232783. [2022-01-28 14:41:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232783 states, 232782 states have (on average 2.4071491782010637) internal successors, (560341), 232782 states have internal predecessors, (560341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232783 states to 232783 states and 560341 transitions. [2022-01-28 14:41:19,056 INFO L78 Accepts]: Start accepts. Automaton has 232783 states and 560341 transitions. Word has length 38 [2022-01-28 14:41:19,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:41:19,056 INFO L470 AbstractCegarLoop]: Abstraction has 232783 states and 560341 transitions. [2022-01-28 14:41:19,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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) [2022-01-28 14:41:19,057 INFO L276 IsEmpty]: Start isEmpty. Operand 232783 states and 560341 transitions. [2022-01-28 14:41:19,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:41:19,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:41:19,118 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:41:19,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-28 14:41:19,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-01-28 14:41:19,324 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:41:19,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:41:19,324 INFO L85 PathProgramCache]: Analyzing trace with hash 679972510, now seen corresponding path program 62 times [2022-01-28 14:41:19,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:41:19,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804806695] [2022-01-28 14:41:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:41:19,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:41:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:41:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:19,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:41:19,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804806695] [2022-01-28 14:41:19,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804806695] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:41:19,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931849476] [2022-01-28 14:41:19,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:41:19,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:41:19,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:41:19,954 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:41:19,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-28 14:41:19,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:41:19,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:41:19,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:41:19,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:41:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:41:20,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:41:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:41:20,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931849476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:41:20,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:41:20,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-01-28 14:41:20,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521268232] [2022-01-28 14:41:20,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:41:20,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 14:41:20,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:41:20,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 14:41:20,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:41:20,594 INFO L87 Difference]: Start difference. First operand 232783 states and 560341 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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) [2022-01-28 14:41:23,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:41:23,705 INFO L93 Difference]: Finished difference Result 257718 states and 616884 transitions. [2022-01-28 14:41:23,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-28 14:41:23,723 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 38 [2022-01-28 14:41:23,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:41:24,555 INFO L225 Difference]: With dead ends: 257718 [2022-01-28 14:41:24,555 INFO L226 Difference]: Without dead ends: 257623 [2022-01-28 14:41:24,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=369, Invalid=3537, Unknown=0, NotChecked=0, Total=3906 [2022-01-28 14:41:24,556 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 362 mSDsluCounter, 3066 mSDsCounter, 0 mSdLazyCounter, 2364 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 2801 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 14:41:24,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 2801 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2364 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 14:41:24,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257623 states. [2022-01-28 14:41:29,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257623 to 238428. [2022-01-28 14:41:30,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238428 states, 238427 states have (on average 2.406254325223234) internal successors, (573716), 238427 states have internal predecessors, (573716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:31,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238428 states to 238428 states and 573716 transitions. [2022-01-28 14:41:31,893 INFO L78 Accepts]: Start accepts. Automaton has 238428 states and 573716 transitions. Word has length 38 [2022-01-28 14:41:31,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:41:31,893 INFO L470 AbstractCegarLoop]: Abstraction has 238428 states and 573716 transitions. [2022-01-28 14:41:31,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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) [2022-01-28 14:41:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 238428 states and 573716 transitions. [2022-01-28 14:41:31,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:41:31,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:41:31,955 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:41:31,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-28 14:41:32,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:41:32,168 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:41:32,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:41:32,173 INFO L85 PathProgramCache]: Analyzing trace with hash 442535240, now seen corresponding path program 63 times [2022-01-28 14:41:32,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:41:32,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768321268] [2022-01-28 14:41:32,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:41:32,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:41:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:41:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:32,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:41:32,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768321268] [2022-01-28 14:41:32,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768321268] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:41:32,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563307486] [2022-01-28 14:41:32,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:41:32,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:41:32,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:41:32,380 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:41:32,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-28 14:41:32,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-28 14:41:32,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:41:32,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:41:32,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:41:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:41:32,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:41:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:41:33,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563307486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:41:33,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:41:33,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-28 14:41:33,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758277165] [2022-01-28 14:41:33,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:41:33,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-28 14:41:33,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:41:33,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-28 14:41:33,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:41:33,099 INFO L87 Difference]: Start difference. First operand 238428 states and 573716 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:36,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:41:36,774 INFO L93 Difference]: Finished difference Result 247178 states and 593496 transitions. [2022-01-28 14:41:36,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-28 14:41:36,775 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:41:36,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:41:37,856 INFO L225 Difference]: With dead ends: 247178 [2022-01-28 14:41:37,856 INFO L226 Difference]: Without dead ends: 247092 [2022-01-28 14:41:37,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=649, Invalid=6157, Unknown=0, NotChecked=0, Total=6806 [2022-01-28 14:41:37,856 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 600 mSDsluCounter, 2932 mSDsCounter, 0 mSdLazyCounter, 2383 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 2475 SdHoareTripleChecker+Invalid, 2564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 14:41:37,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 2475 Invalid, 2564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2383 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 14:41:38,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247092 states. [2022-01-28 14:41:42,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247092 to 242549. [2022-01-28 14:41:42,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242549 states, 242548 states have (on average 2.4067318633837425) internal successors, (583748), 242548 states have internal predecessors, (583748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242549 states to 242549 states and 583748 transitions. [2022-01-28 14:41:43,754 INFO L78 Accepts]: Start accepts. Automaton has 242549 states and 583748 transitions. Word has length 38 [2022-01-28 14:41:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:41:43,754 INFO L470 AbstractCegarLoop]: Abstraction has 242549 states and 583748 transitions. [2022-01-28 14:41:43,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:43,754 INFO L276 IsEmpty]: Start isEmpty. Operand 242549 states and 583748 transitions. [2022-01-28 14:41:44,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:41:44,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:41:44,266 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:41:44,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-28 14:41:44,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:41:44,482 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:41:44,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:41:44,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1936505558, now seen corresponding path program 64 times [2022-01-28 14:41:44,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:41:44,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302336424] [2022-01-28 14:41:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:41:44,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:41:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:41:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:44,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:41:44,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302336424] [2022-01-28 14:41:44,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302336424] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:41:44,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842353629] [2022-01-28 14:41:44,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:41:44,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:41:44,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:41:44,661 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:41:44,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-28 14:41:44,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:41:44,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:41:44,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:41:44,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:41:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:41:44,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:41:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:41:45,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842353629] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:41:45,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:41:45,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-01-28 14:41:45,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719862639] [2022-01-28 14:41:45,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:41:45,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 14:41:45,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:41:45,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 14:41:45,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:41:45,293 INFO L87 Difference]: Start difference. First operand 242549 states and 583748 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:47,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:41:47,842 INFO L93 Difference]: Finished difference Result 259471 states and 621961 transitions. [2022-01-28 14:41:47,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-28 14:41:47,843 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:41:47,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:41:48,706 INFO L225 Difference]: With dead ends: 259471 [2022-01-28 14:41:48,706 INFO L226 Difference]: Without dead ends: 259425 [2022-01-28 14:41:48,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=297, Invalid=2565, Unknown=0, NotChecked=0, Total=2862 [2022-01-28 14:41:48,707 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 272 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:41:48,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 1824 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:41:48,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259425 states. [2022-01-28 14:41:53,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259425 to 244014. [2022-01-28 14:41:53,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244014 states, 244013 states have (on average 2.4064332638015187) internal successors, (587201), 244013 states have internal predecessors, (587201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244014 states to 244014 states and 587201 transitions. [2022-01-28 14:41:54,906 INFO L78 Accepts]: Start accepts. Automaton has 244014 states and 587201 transitions. Word has length 38 [2022-01-28 14:41:54,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:41:54,906 INFO L470 AbstractCegarLoop]: Abstraction has 244014 states and 587201 transitions. [2022-01-28 14:41:54,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:54,906 INFO L276 IsEmpty]: Start isEmpty. Operand 244014 states and 587201 transitions. [2022-01-28 14:41:54,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:41:54,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:41:54,964 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:41:54,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-28 14:41:55,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:41:55,180 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:41:55,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:41:55,180 INFO L85 PathProgramCache]: Analyzing trace with hash 423917610, now seen corresponding path program 65 times [2022-01-28 14:41:55,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:41:55,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915469021] [2022-01-28 14:41:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:41:55,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:41:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:41:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:55,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:41:55,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915469021] [2022-01-28 14:41:55,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915469021] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:41:55,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466249795] [2022-01-28 14:41:55,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:41:55,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:41:55,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:41:55,368 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:41:55,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-28 14:41:55,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-28 14:41:55,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:41:55,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:41:55,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:41:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:41:55,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:41:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:41:55,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466249795] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:41:55,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:41:55,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-28 14:41:55,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135971536] [2022-01-28 14:41:55,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:41:55,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 14:41:55,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:41:55,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 14:41:55,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:41:55,992 INFO L87 Difference]: Start difference. First operand 244014 states and 587201 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:58,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:41:58,989 INFO L93 Difference]: Finished difference Result 266371 states and 638012 transitions. [2022-01-28 14:41:58,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-28 14:41:58,989 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:41:58,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:42:00,211 INFO L225 Difference]: With dead ends: 266371 [2022-01-28 14:42:00,211 INFO L226 Difference]: Without dead ends: 266301 [2022-01-28 14:42:00,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=385, Invalid=3397, Unknown=0, NotChecked=0, Total=3782 [2022-01-28 14:42:00,212 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 353 mSDsluCounter, 1857 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:42:00,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 1639 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1691 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:42:00,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266301 states. [2022-01-28 14:42:05,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266301 to 247320. [2022-01-28 14:42:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247320 states, 247319 states have (on average 2.4065437754479033) internal successors, (595184), 247319 states have internal predecessors, (595184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:08,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247320 states to 247320 states and 595184 transitions. [2022-01-28 14:42:08,030 INFO L78 Accepts]: Start accepts. Automaton has 247320 states and 595184 transitions. Word has length 38 [2022-01-28 14:42:08,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:42:08,030 INFO L470 AbstractCegarLoop]: Abstraction has 247320 states and 595184 transitions. [2022-01-28 14:42:08,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 247320 states and 595184 transitions. [2022-01-28 14:42:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:42:08,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:42:08,091 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:42:08,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-28 14:42:08,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-01-28 14:42:08,307 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:42:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:42:08,308 INFO L85 PathProgramCache]: Analyzing trace with hash -2054048424, now seen corresponding path program 66 times [2022-01-28 14:42:08,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:42:08,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950185034] [2022-01-28 14:42:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:42:08,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:42:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:42:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:42:08,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:42:08,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950185034] [2022-01-28 14:42:08,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950185034] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:42:08,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098380732] [2022-01-28 14:42:08,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:42:08,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:42:08,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:42:08,548 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:42:08,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-28 14:42:08,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:42:08,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:42:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:42:08,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:42:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:42:08,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:42:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:42:09,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098380732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:42:09,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:42:09,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-28 14:42:09,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132618626] [2022-01-28 14:42:09,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:42:09,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:42:09,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:42:09,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:42:09,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:42:09,225 INFO L87 Difference]: Start difference. First operand 247320 states and 595184 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:12,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:42:12,026 INFO L93 Difference]: Finished difference Result 263347 states and 631500 transitions. [2022-01-28 14:42:12,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-28 14:42:12,027 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:42:12,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:42:12,895 INFO L225 Difference]: With dead ends: 263347 [2022-01-28 14:42:12,896 INFO L226 Difference]: Without dead ends: 263330 [2022-01-28 14:42:12,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=280, Invalid=2582, Unknown=0, NotChecked=0, Total=2862 [2022-01-28 14:42:12,896 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 225 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:42:12,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 1646 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:42:13,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263330 states. [2022-01-28 14:42:18,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263330 to 248311. [2022-01-28 14:42:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248311 states, 248310 states have (on average 2.4066328379847772) internal successors, (597591), 248310 states have internal predecessors, (597591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:19,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248311 states to 248311 states and 597591 transitions. [2022-01-28 14:42:19,778 INFO L78 Accepts]: Start accepts. Automaton has 248311 states and 597591 transitions. Word has length 38 [2022-01-28 14:42:19,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:42:19,778 INFO L470 AbstractCegarLoop]: Abstraction has 248311 states and 597591 transitions. [2022-01-28 14:42:19,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:19,778 INFO L276 IsEmpty]: Start isEmpty. Operand 248311 states and 597591 transitions. [2022-01-28 14:42:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:42:19,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:42:19,838 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:42:19,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-28 14:42:20,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:42:20,051 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:42:20,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:42:20,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1838109140, now seen corresponding path program 67 times [2022-01-28 14:42:20,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:42:20,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892490514] [2022-01-28 14:42:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:42:20,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:42:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:42:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:42:20,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:42:20,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892490514] [2022-01-28 14:42:20,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892490514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:42:20,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411687368] [2022-01-28 14:42:20,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:42:20,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:42:20,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:42:20,216 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:42:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:42:20,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-28 14:42:20,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:42:20,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:42:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:42:20,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:42:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:42:20,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411687368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:42:20,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:42:20,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-28 14:42:20,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227399086] [2022-01-28 14:42:20,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:42:20,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:42:20,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:42:20,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:42:20,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:42:20,806 INFO L87 Difference]: Start difference. First operand 248311 states and 597591 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:24,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:42:24,376 INFO L93 Difference]: Finished difference Result 263955 states and 634548 transitions. [2022-01-28 14:42:24,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-28 14:42:24,377 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:42:24,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:42:25,425 INFO L225 Difference]: With dead ends: 263955 [2022-01-28 14:42:25,425 INFO L226 Difference]: Without dead ends: 263904 [2022-01-28 14:42:25,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=595, Invalid=5885, Unknown=0, NotChecked=0, Total=6480 [2022-01-28 14:42:25,426 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 374 mSDsluCounter, 2600 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:42:25,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 2341 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 14:42:26,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263904 states. [2022-01-28 14:42:30,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263904 to 249476. [2022-01-28 14:42:31,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249476 states, 249475 states have (on average 2.406609880749574) internal successors, (600389), 249475 states have internal predecessors, (600389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:32,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249476 states to 249476 states and 600389 transitions. [2022-01-28 14:42:32,358 INFO L78 Accepts]: Start accepts. Automaton has 249476 states and 600389 transitions. Word has length 38 [2022-01-28 14:42:32,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:42:32,359 INFO L470 AbstractCegarLoop]: Abstraction has 249476 states and 600389 transitions. [2022-01-28 14:42:32,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:32,359 INFO L276 IsEmpty]: Start isEmpty. Operand 249476 states and 600389 transitions. [2022-01-28 14:42:32,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:42:32,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:42:32,425 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:42:32,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-28 14:42:32,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:42:32,634 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:42:32,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:42:32,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1493213996, now seen corresponding path program 68 times [2022-01-28 14:42:32,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:42:32,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162341956] [2022-01-28 14:42:32,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:42:32,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:42:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:42:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:42:32,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:42:32,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162341956] [2022-01-28 14:42:32,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162341956] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:42:32,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218873116] [2022-01-28 14:42:32,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:42:32,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:42:32,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:42:32,794 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:42:32,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-28 14:42:32,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:42:32,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:42:32,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:42:32,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:42:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:42:33,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:42:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:42:33,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218873116] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:42:33,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:42:33,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-28 14:42:33,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043033913] [2022-01-28 14:42:33,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:42:33,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 14:42:33,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:42:33,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 14:42:33,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:42:33,461 INFO L87 Difference]: Start difference. First operand 249476 states and 600389 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:37,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:42:37,102 INFO L93 Difference]: Finished difference Result 293252 states and 702115 transitions. [2022-01-28 14:42:37,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-28 14:42:37,104 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:42:37,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:42:38,624 INFO L225 Difference]: With dead ends: 293252 [2022-01-28 14:42:38,624 INFO L226 Difference]: Without dead ends: 293183 [2022-01-28 14:42:38,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=510, Invalid=5342, Unknown=0, NotChecked=0, Total=5852 [2022-01-28 14:42:38,624 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 397 mSDsluCounter, 2457 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 2283 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:42:38,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 2283 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1795 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 14:42:38,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293183 states. [2022-01-28 14:42:44,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293183 to 259027. [2022-01-28 14:42:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259027 states, 259026 states have (on average 2.407912719186491) internal successors, (623712), 259026 states have internal predecessors, (623712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:46,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259027 states to 259027 states and 623712 transitions. [2022-01-28 14:42:46,083 INFO L78 Accepts]: Start accepts. Automaton has 259027 states and 623712 transitions. Word has length 38 [2022-01-28 14:42:46,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:42:46,083 INFO L470 AbstractCegarLoop]: Abstraction has 259027 states and 623712 transitions. [2022-01-28 14:42:46,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 259027 states and 623712 transitions. [2022-01-28 14:42:46,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-28 14:42:46,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:42:46,164 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:42:46,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-28 14:42:46,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-01-28 14:42:46,378 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:42:46,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:42:46,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1198330438, now seen corresponding path program 69 times [2022-01-28 14:42:46,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:42:46,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825768357] [2022-01-28 14:42:46,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:42:46,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:42:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:42:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:42:46,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:42:46,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825768357] [2022-01-28 14:42:46,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825768357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:42:46,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739809538] [2022-01-28 14:42:46,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:42:46,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:42:46,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:42:46,542 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:42:46,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-28 14:42:46,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:42:46,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:42:46,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:42:46,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:42:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:42:46,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:42:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:42:47,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739809538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:42:47,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:42:47,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-28 14:42:47,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432433390] [2022-01-28 14:42:47,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:42:47,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:42:47,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:42:47,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:42:47,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:42:47,226 INFO L87 Difference]: Start difference. First operand 259027 states and 623712 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:50,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:42:50,294 INFO L93 Difference]: Finished difference Result 289168 states and 693821 transitions. [2022-01-28 14:42:50,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-28 14:42:50,295 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-28 14:42:50,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:42:51,188 INFO L225 Difference]: With dead ends: 289168 [2022-01-28 14:42:51,188 INFO L226 Difference]: Without dead ends: 289151 [2022-01-28 14:42:51,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=350, Invalid=3682, Unknown=0, NotChecked=0, Total=4032 [2022-01-28 14:42:51,188 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 287 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:42:51,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 1699 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:42:51,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289151 states. [2022-01-28 14:42:56,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289151 to 260145. [2022-01-28 14:42:57,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260145 states, 260144 states have (on average 2.407966357094532) internal successors, (626418), 260144 states have internal predecessors, (626418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:58,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260145 states to 260145 states and 626418 transitions. [2022-01-28 14:42:58,494 INFO L78 Accepts]: Start accepts. Automaton has 260145 states and 626418 transitions. Word has length 38 [2022-01-28 14:42:58,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:42:58,494 INFO L470 AbstractCegarLoop]: Abstraction has 260145 states and 626418 transitions. [2022-01-28 14:42:58,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:58,495 INFO L276 IsEmpty]: Start isEmpty. Operand 260145 states and 626418 transitions. [2022-01-28 14:42:58,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 14:42:58,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:42:58,585 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:42:58,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-28 14:42:58,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-01-28 14:42:58,787 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:42:58,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:42:58,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1192238897, now seen corresponding path program 7 times [2022-01-28 14:42:58,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:42:58,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211089336] [2022-01-28 14:42:58,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:42:58,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:42:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:42:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:42:58,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:42:58,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211089336] [2022-01-28 14:42:58,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211089336] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:42:58,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277795633] [2022-01-28 14:42:58,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:42:58,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:42:58,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:42:58,823 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:42:58,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-28 14:42:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:42:58,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-28 14:42:58,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:42:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:42:59,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:42:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:42:59,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277795633] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:42:59,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:42:59,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 11 [2022-01-28 14:42:59,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037610478] [2022-01-28 14:42:59,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:42:59,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 14:42:59,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:42:59,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 14:42:59,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-01-28 14:42:59,411 INFO L87 Difference]: Start difference. First operand 260145 states and 626418 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:01,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:43:01,173 INFO L93 Difference]: Finished difference Result 321184 states and 775584 transitions. [2022-01-28 14:43:01,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:43:01,174 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 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 39 [2022-01-28 14:43:01,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:43:02,488 INFO L225 Difference]: With dead ends: 321184 [2022-01-28 14:43:02,489 INFO L226 Difference]: Without dead ends: 320377 [2022-01-28 14:43:02,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:43:02,489 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 131 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:43:02,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 335 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:43:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320377 states. [2022-01-28 14:43:08,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320377 to 285108. [2022-01-28 14:43:08,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285108 states, 285107 states have (on average 2.4088429957875466) internal successors, (686778), 285107 states have internal predecessors, (686778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:10,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285108 states to 285108 states and 686778 transitions. [2022-01-28 14:43:10,256 INFO L78 Accepts]: Start accepts. Automaton has 285108 states and 686778 transitions. Word has length 39 [2022-01-28 14:43:10,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:43:10,256 INFO L470 AbstractCegarLoop]: Abstraction has 285108 states and 686778 transitions. [2022-01-28 14:43:10,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:10,256 INFO L276 IsEmpty]: Start isEmpty. Operand 285108 states and 686778 transitions. [2022-01-28 14:43:10,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 14:43:10,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:43:10,326 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:43:10,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-01-28 14:43:10,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:43:10,542 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:43:10,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:43:10,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1351846617, now seen corresponding path program 8 times [2022-01-28 14:43:10,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:43:10,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895619269] [2022-01-28 14:43:10,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:43:10,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:43:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:43:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:10,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:43:10,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895619269] [2022-01-28 14:43:10,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895619269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:43:10,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496245609] [2022-01-28 14:43:10,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:43:10,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:43:10,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:43:10,573 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:43:10,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-28 14:43:10,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:43:10,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:43:10,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-28 14:43:10,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:43:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 14:43:10,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:43:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 14:43:10,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496245609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:43:10,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:43:10,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 8 [2022-01-28 14:43:10,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861225060] [2022-01-28 14:43:10,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:43:10,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 14:43:10,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:43:10,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 14:43:10,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-28 14:43:10,687 INFO L87 Difference]: Start difference. First operand 285108 states and 686778 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:12,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:43:12,810 INFO L93 Difference]: Finished difference Result 287926 states and 691391 transitions. [2022-01-28 14:43:12,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:43:12,811 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 14:43:12,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:43:14,238 INFO L225 Difference]: With dead ends: 287926 [2022-01-28 14:43:14,238 INFO L226 Difference]: Without dead ends: 287920 [2022-01-28 14:43:14,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-01-28 14:43:14,239 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 73 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:43:14,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 212 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:43:14,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287920 states. [2022-01-28 14:43:20,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287920 to 285072. [2022-01-28 14:43:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285072 states, 285071 states have (on average 2.408557868039892) internal successors, (686610), 285071 states have internal predecessors, (686610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:22,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285072 states to 285072 states and 686610 transitions. [2022-01-28 14:43:22,097 INFO L78 Accepts]: Start accepts. Automaton has 285072 states and 686610 transitions. Word has length 39 [2022-01-28 14:43:22,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:43:22,097 INFO L470 AbstractCegarLoop]: Abstraction has 285072 states and 686610 transitions. [2022-01-28 14:43:22,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:22,097 INFO L276 IsEmpty]: Start isEmpty. Operand 285072 states and 686610 transitions. [2022-01-28 14:43:22,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 14:43:22,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:43:22,171 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:43:22,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-28 14:43:22,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:43:22,372 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:43:22,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:43:22,372 INFO L85 PathProgramCache]: Analyzing trace with hash -735468407, now seen corresponding path program 9 times [2022-01-28 14:43:22,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:43:22,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966317606] [2022-01-28 14:43:22,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:43:22,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:43:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:43:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:43:22,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:43:22,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966317606] [2022-01-28 14:43:22,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966317606] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:43:22,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825463684] [2022-01-28 14:43:22,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:43:22,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:43:22,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:43:22,410 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:43:22,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-28 14:43:22,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:43:22,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:43:22,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 14:43:22,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:43:22,490 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:43:22,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:43:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:43:22,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825463684] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:43:22,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:43:22,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-01-28 14:43:22,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123877516] [2022-01-28 14:43:22,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:43:22,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 14:43:22,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:43:22,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 14:43:22,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:43:22,568 INFO L87 Difference]: Start difference. First operand 285072 states and 686610 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:24,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:43:24,985 INFO L93 Difference]: Finished difference Result 349072 states and 840084 transitions. [2022-01-28 14:43:24,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:43:24,985 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 14:43:24,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:43:26,562 INFO L225 Difference]: With dead ends: 349072 [2022-01-28 14:43:26,562 INFO L226 Difference]: Without dead ends: 348327 [2022-01-28 14:43:26,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:43:26,562 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 191 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:43:26,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 249 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:43:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348327 states. [2022-01-28 14:43:33,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348327 to 286675. [2022-01-28 14:43:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286675 states, 286674 states have (on average 2.4018013492678096) internal successors, (688534), 286674 states have internal predecessors, (688534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:34,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286675 states to 286675 states and 688534 transitions. [2022-01-28 14:43:34,794 INFO L78 Accepts]: Start accepts. Automaton has 286675 states and 688534 transitions. Word has length 39 [2022-01-28 14:43:34,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:43:34,794 INFO L470 AbstractCegarLoop]: Abstraction has 286675 states and 688534 transitions. [2022-01-28 14:43:34,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:34,794 INFO L276 IsEmpty]: Start isEmpty. Operand 286675 states and 688534 transitions. [2022-01-28 14:43:34,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 14:43:34,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:43:34,859 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:43:34,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-28 14:43:35,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-01-28 14:43:35,075 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:43:35,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:43:35,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1946601264, now seen corresponding path program 70 times [2022-01-28 14:43:35,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:43:35,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227186838] [2022-01-28 14:43:35,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:43:35,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:43:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:43:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:43:35,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:43:35,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227186838] [2022-01-28 14:43:35,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227186838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:43:35,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753789241] [2022-01-28 14:43:35,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:43:35,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:43:35,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:43:35,570 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:43:35,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-28 14:43:35,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:43:35,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:43:35,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:43:35,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:43:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:43:35,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:43:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:43:35,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753789241] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:43:35,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:43:35,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-01-28 14:43:35,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654412427] [2022-01-28 14:43:35,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:43:35,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 14:43:35,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:43:35,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 14:43:35,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-28 14:43:35,718 INFO L87 Difference]: Start difference. First operand 286675 states and 688534 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:37,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:43:37,573 INFO L93 Difference]: Finished difference Result 339005 states and 814007 transitions. [2022-01-28 14:43:37,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:43:37,574 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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 39 [2022-01-28 14:43:37,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:43:38,986 INFO L225 Difference]: With dead ends: 339005 [2022-01-28 14:43:38,986 INFO L226 Difference]: Without dead ends: 338883 [2022-01-28 14:43:38,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:43:38,987 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 187 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:43:38,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 118 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:43:39,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338883 states. [2022-01-28 14:43:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338883 to 337181. [2022-01-28 14:43:46,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337181 states, 337180 states have (on average 2.3982917136247703) internal successors, (808656), 337180 states have internal predecessors, (808656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:49,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337181 states to 337181 states and 808656 transitions. [2022-01-28 14:43:49,914 INFO L78 Accepts]: Start accepts. Automaton has 337181 states and 808656 transitions. Word has length 39 [2022-01-28 14:43:49,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:43:49,914 INFO L470 AbstractCegarLoop]: Abstraction has 337181 states and 808656 transitions. [2022-01-28 14:43:49,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:49,914 INFO L276 IsEmpty]: Start isEmpty. Operand 337181 states and 808656 transitions. [2022-01-28 14:43:50,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 14:43:50,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:43:50,013 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:43:50,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-28 14:43:50,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:43:50,229 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:43:50,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:43:50,230 INFO L85 PathProgramCache]: Analyzing trace with hash -185359280, now seen corresponding path program 71 times [2022-01-28 14:43:50,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:43:50,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970655402] [2022-01-28 14:43:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:43:50,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:43:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:43:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:43:50,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:43:50,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970655402] [2022-01-28 14:43:50,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970655402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:43:50,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407863234] [2022-01-28 14:43:50,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:43:50,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:43:50,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:43:50,269 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:43:50,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-28 14:43:50,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 14:43:50,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:43:50,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:43:50,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:43:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 14:43:50,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:43:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 14:43:50,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407863234] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:43:50,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:43:50,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-28 14:43:50,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629198793] [2022-01-28 14:43:50,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:43:50,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:43:50,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:43:50,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:43:50,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:43:50,441 INFO L87 Difference]: Start difference. First operand 337181 states and 808656 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:53,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:43:53,319 INFO L93 Difference]: Finished difference Result 338000 states and 806990 transitions. [2022-01-28 14:43:53,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:43:53,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 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 39 [2022-01-28 14:43:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:43:54,627 INFO L225 Difference]: With dead ends: 338000 [2022-01-28 14:43:54,627 INFO L226 Difference]: Without dead ends: 337997 [2022-01-28 14:43:54,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:43:54,627 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 117 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:43:54,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 96 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:43:55,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337997 states. [2022-01-28 14:44:01,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337997 to 290870. [2022-01-28 14:44:01,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290870 states, 290869 states have (on average 2.39994292963499) internal successors, (698069), 290869 states have internal predecessors, (698069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:44:02,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290870 states to 290870 states and 698069 transitions. [2022-01-28 14:44:02,992 INFO L78 Accepts]: Start accepts. Automaton has 290870 states and 698069 transitions. Word has length 39 [2022-01-28 14:44:02,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:44:02,992 INFO L470 AbstractCegarLoop]: Abstraction has 290870 states and 698069 transitions. [2022-01-28 14:44:02,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:44:02,993 INFO L276 IsEmpty]: Start isEmpty. Operand 290870 states and 698069 transitions. [2022-01-28 14:44:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 14:44:03,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:44:03,496 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:44:03,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-28 14:44:03,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:44:03,711 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:44:03,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:44:03,712 INFO L85 PathProgramCache]: Analyzing trace with hash 815477842, now seen corresponding path program 72 times [2022-01-28 14:44:03,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:44:03,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272368300] [2022-01-28 14:44:03,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:44:03,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:44:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:44:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:44:03,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:44:03,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272368300] [2022-01-28 14:44:03,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272368300] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:44:03,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666501889] [2022-01-28 14:44:03,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:44:03,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:44:03,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:44:03,744 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:44:03,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-28 14:44:03,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:44:03,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:44:03,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:44:03,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:44:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:44:03,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:44:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:44:03,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666501889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:44:03,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:44:03,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-28 14:44:03,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306970329] [2022-01-28 14:44:03,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:44:03,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:44:03,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:44:03,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:44:03,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:44:03,865 INFO L87 Difference]: Start difference. First operand 290870 states and 698069 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:44:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:44:05,743 INFO L93 Difference]: Finished difference Result 353721 states and 845549 transitions. [2022-01-28 14:44:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:44:05,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 39 [2022-01-28 14:44:05,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:44:07,384 INFO L225 Difference]: With dead ends: 353721 [2022-01-28 14:44:07,384 INFO L226 Difference]: Without dead ends: 353705 [2022-01-28 14:44:07,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:44:07,385 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 82 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:44:07,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 114 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:44:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353705 states. [2022-01-28 14:44:15,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353705 to 352361. [2022-01-28 14:44:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352361 states, 352360 states have (on average 2.391792484958565) internal successors, (842772), 352360 states have internal predecessors, (842772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:44:18,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352361 states to 352361 states and 842772 transitions. [2022-01-28 14:44:18,322 INFO L78 Accepts]: Start accepts. Automaton has 352361 states and 842772 transitions. Word has length 39 [2022-01-28 14:44:18,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:44:18,322 INFO L470 AbstractCegarLoop]: Abstraction has 352361 states and 842772 transitions. [2022-01-28 14:44:18,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:44:18,323 INFO L276 IsEmpty]: Start isEmpty. Operand 352361 states and 842772 transitions. [2022-01-28 14:44:18,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 14:44:18,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:44:18,395 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:44:18,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-28 14:44:18,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-01-28 14:44:18,611 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:44:18,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:44:18,611 INFO L85 PathProgramCache]: Analyzing trace with hash 410110102, now seen corresponding path program 73 times [2022-01-28 14:44:18,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:44:18,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187707854] [2022-01-28 14:44:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:44:18,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:44:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:44:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 14:44:18,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:44:18,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187707854] [2022-01-28 14:44:18,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187707854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:44:18,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812104479] [2022-01-28 14:44:18,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:44:18,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:44:18,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:44:18,664 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:44:18,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-28 14:44:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:44:18,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:44:18,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:44:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:44:18,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:44:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:44:18,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812104479] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:44:18,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:44:18,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-28 14:44:18,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974104097] [2022-01-28 14:44:18,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:44:18,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:44:18,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:44:18,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:44:18,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:44:18,836 INFO L87 Difference]: Start difference. First operand 352361 states and 842772 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:44:21,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:44:21,514 INFO L93 Difference]: Finished difference Result 362182 states and 862751 transitions. [2022-01-28 14:44:21,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:44:21,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 39 [2022-01-28 14:44:21,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:44:23,127 INFO L225 Difference]: With dead ends: 362182 [2022-01-28 14:44:23,127 INFO L226 Difference]: Without dead ends: 362179 [2022-01-28 14:44:23,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:44:23,129 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 93 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:44:23,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 119 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:44:23,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362179 states. [2022-01-28 14:44:30,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362179 to 357027. [2022-01-28 14:44:31,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357027 states, 357026 states have (on average 2.387635634379569) internal successors, (852448), 357026 states have internal predecessors, (852448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:44:33,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357027 states to 357027 states and 852448 transitions. [2022-01-28 14:44:33,667 INFO L78 Accepts]: Start accepts. Automaton has 357027 states and 852448 transitions. Word has length 39 [2022-01-28 14:44:33,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:44:33,667 INFO L470 AbstractCegarLoop]: Abstraction has 357027 states and 852448 transitions. [2022-01-28 14:44:33,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:44:33,667 INFO L276 IsEmpty]: Start isEmpty. Operand 357027 states and 852448 transitions. [2022-01-28 14:44:33,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 14:44:33,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:44:33,754 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:44:33,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-28 14:44:33,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:44:33,971 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:44:33,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:44:33,971 INFO L85 PathProgramCache]: Analyzing trace with hash 875424144, now seen corresponding path program 74 times [2022-01-28 14:44:33,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:44:33,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807750680] [2022-01-28 14:44:33,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:44:33,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:44:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:44:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:44:34,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:44:34,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807750680] [2022-01-28 14:44:34,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807750680] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:44:34,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459961862] [2022-01-28 14:44:34,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:44:34,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:44:34,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:44:34,029 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:44:34,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:44:34,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:44:34,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:44:34,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:44:34,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-28 14:44:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 14:44:34,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:44:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 14:44:34,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459961862] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:44:34,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:44:34,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-28 14:44:34,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351687891] [2022-01-28 14:44:34,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:44:34,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 14:44:34,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:44:34,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 14:44:34,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:44:34,193 INFO L87 Difference]: Start difference. First operand 357027 states and 852448 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:44:36,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:44:36,591 INFO L93 Difference]: Finished difference Result 358971 states and 849352 transitions. [2022-01-28 14:44:36,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:44:36,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 39 [2022-01-28 14:44:36,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:44:38,193 INFO L225 Difference]: With dead ends: 358971 [2022-01-28 14:44:38,194 INFO L226 Difference]: Without dead ends: 358968 [2022-01-28 14:44:38,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-01-28 14:44:38,194 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 99 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:44:38,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 112 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:44:38,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358968 states. [2022-01-28 14:44:46,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358968 to 340334. [2022-01-28 14:44:46,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340334 states, 340333 states have (on average 2.3787702044762042) internal successors, (809574), 340333 states have internal predecessors, (809574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:44:48,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340334 states to 340334 states and 809574 transitions. [2022-01-28 14:44:48,727 INFO L78 Accepts]: Start accepts. Automaton has 340334 states and 809574 transitions. Word has length 39 [2022-01-28 14:44:48,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:44:48,727 INFO L470 AbstractCegarLoop]: Abstraction has 340334 states and 809574 transitions. [2022-01-28 14:44:48,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:44:48,728 INFO L276 IsEmpty]: Start isEmpty. Operand 340334 states and 809574 transitions. [2022-01-28 14:44:48,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 14:44:48,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:44:48,794 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:44:48,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-28 14:44:48,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:44:48,999 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:44:49,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:44:49,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1935502256, now seen corresponding path program 75 times [2022-01-28 14:44:49,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:44:49,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52259230] [2022-01-28 14:44:49,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:44:49,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:44:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:44:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:44:49,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:44:49,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52259230] [2022-01-28 14:44:49,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52259230] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:44:49,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753648248] [2022-01-28 14:44:49,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:44:49,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:44:49,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:44:49,031 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:44:49,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-28 14:44:49,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:44:49,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:44:49,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:44:49,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:44:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:44:49,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:44:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:44:49,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753648248] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:44:49,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:44:49,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-28 14:44:49,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65086598] [2022-01-28 14:44:49,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:44:49,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 14:44:49,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:44:49,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 14:44:49,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:44:49,174 INFO L87 Difference]: Start difference. First operand 340334 states and 809574 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:44:51,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:44:51,659 INFO L93 Difference]: Finished difference Result 341420 states and 811356 transitions. [2022-01-28 14:44:51,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:44:51,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2022-01-28 14:44:51,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:44:53,120 INFO L225 Difference]: With dead ends: 341420 [2022-01-28 14:44:53,121 INFO L226 Difference]: Without dead ends: 341358 [2022-01-28 14:44:53,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-28 14:44:53,121 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 98 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:44:53,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 102 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:44:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341358 states. [2022-01-28 14:44:59,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341358 to 340312. [2022-01-28 14:44:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340312 states, 340311 states have (on average 2.374683745162513) internal successors, (808131), 340311 states have internal predecessors, (808131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:45:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340312 states to 340312 states and 808131 transitions. [2022-01-28 14:45:02,189 INFO L78 Accepts]: Start accepts. Automaton has 340312 states and 808131 transitions. Word has length 39 [2022-01-28 14:45:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:45:02,190 INFO L470 AbstractCegarLoop]: Abstraction has 340312 states and 808131 transitions. [2022-01-28 14:45:02,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:45:02,190 INFO L276 IsEmpty]: Start isEmpty. Operand 340312 states and 808131 transitions. [2022-01-28 14:45:02,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 14:45:02,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:45:02,254 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:45:02,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-28 14:45:02,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-01-28 14:45:02,470 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:45:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:45:02,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1358420656, now seen corresponding path program 76 times [2022-01-28 14:45:02,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:45:02,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630614132] [2022-01-28 14:45:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:45:02,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:45:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:45:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:45:02,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:45:02,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630614132] [2022-01-28 14:45:02,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630614132] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:45:02,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793506317] [2022-01-28 14:45:02,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:45:02,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:45:02,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:45:02,495 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:45:02,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-28 14:45:02,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:45:02,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:45:02,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:45:02,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:45:02,570 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 14:45:02,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:45:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 14:45:02,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793506317] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:45:02,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:45:02,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-28 14:45:02,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256478517] [2022-01-28 14:45:02,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:45:02,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:45:02,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:45:02,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:45:02,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:45:02,631 INFO L87 Difference]: Start difference. First operand 340312 states and 808131 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:45:05,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:45:05,039 INFO L93 Difference]: Finished difference Result 350854 states and 832315 transitions. [2022-01-28 14:45:05,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:45:05,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 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 39 [2022-01-28 14:45:05,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:45:06,143 INFO L225 Difference]: With dead ends: 350854 [2022-01-28 14:45:06,144 INFO L226 Difference]: Without dead ends: 350838 [2022-01-28 14:45:06,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:45:06,144 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 57 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:45:06,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 126 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:45:06,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350838 states. [2022-01-28 14:45:14,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350838 to 350557. [2022-01-28 14:45:15,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350557 states, 350556 states have (on average 2.372434076153311) internal successors, (831671), 350556 states have internal predecessors, (831671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:45:17,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350557 states to 350557 states and 831671 transitions. [2022-01-28 14:45:17,102 INFO L78 Accepts]: Start accepts. Automaton has 350557 states and 831671 transitions. Word has length 39 [2022-01-28 14:45:17,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:45:17,103 INFO L470 AbstractCegarLoop]: Abstraction has 350557 states and 831671 transitions. [2022-01-28 14:45:17,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:45:17,103 INFO L276 IsEmpty]: Start isEmpty. Operand 350557 states and 831671 transitions. [2022-01-28 14:45:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 14:45:17,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:45:17,186 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:45:17,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-01-28 14:45:17,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:45:17,399 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:45:17,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:45:17,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1763788396, now seen corresponding path program 77 times [2022-01-28 14:45:17,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:45:17,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888381324] [2022-01-28 14:45:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:45:17,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:45:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:45:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:45:17,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:45:17,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888381324] [2022-01-28 14:45:17,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888381324] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:45:17,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248310295] [2022-01-28 14:45:17,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:45:17,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:45:17,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:45:17,431 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:45:17,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-28 14:45:17,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-28 14:45:17,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:45:17,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:45:17,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:45:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 14:45:17,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:45:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 14:45:17,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248310295] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:45:17,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:45:17,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-28 14:45:17,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31869147] [2022-01-28 14:45:17,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:45:17,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:45:17,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:45:17,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:45:17,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:45:17,576 INFO L87 Difference]: Start difference. First operand 350557 states and 831671 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:45:19,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:45:19,932 INFO L93 Difference]: Finished difference Result 356211 states and 843397 transitions. [2022-01-28 14:45:19,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:45:19,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 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 39 [2022-01-28 14:45:19,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:45:21,433 INFO L225 Difference]: With dead ends: 356211 [2022-01-28 14:45:21,433 INFO L226 Difference]: Without dead ends: 356208 [2022-01-28 14:45:21,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:45:21,434 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 68 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:45:21,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 115 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:45:21,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356208 states. [2022-01-28 14:45:28,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356208 to 352212. [2022-01-28 14:45:29,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352212 states, 352211 states have (on average 2.371021915840221) internal successors, (835100), 352211 states have internal predecessors, (835100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:45:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352212 states to 352212 states and 835100 transitions. [2022-01-28 14:45:31,662 INFO L78 Accepts]: Start accepts. Automaton has 352212 states and 835100 transitions. Word has length 39 [2022-01-28 14:45:31,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:45:31,663 INFO L470 AbstractCegarLoop]: Abstraction has 352212 states and 835100 transitions. [2022-01-28 14:45:31,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:45:31,663 INFO L276 IsEmpty]: Start isEmpty. Operand 352212 states and 835100 transitions. [2022-01-28 14:45:31,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 14:45:31,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:45:31,742 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:45:31,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-01-28 14:45:31,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:45:31,951 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:45:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:45:31,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1298474354, now seen corresponding path program 78 times [2022-01-28 14:45:31,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:45:31,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26027254] [2022-01-28 14:45:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:45:31,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:45:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:45:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 14:45:31,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:45:31,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26027254] [2022-01-28 14:45:31,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26027254] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:45:31,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994841239] [2022-01-28 14:45:31,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:45:31,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:45:31,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:45:31,976 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:45:31,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-28 14:45:31,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-28 14:45:31,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:45:32,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:45:32,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:45:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 14:45:32,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:45:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 14:45:32,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994841239] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:45:32,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:45:32,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-01-28 14:45:32,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247014339] [2022-01-28 14:45:32,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:45:32,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 14:45:32,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:45:32,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 14:45:32,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:45:32,129 INFO L87 Difference]: Start difference. First operand 352212 states and 835100 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:45:34,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:45:34,703 INFO L93 Difference]: Finished difference Result 359965 states and 850571 transitions. [2022-01-28 14:45:34,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:45:34,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 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 39 [2022-01-28 14:45:34,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:45:36,131 INFO L225 Difference]: With dead ends: 359965 [2022-01-28 14:45:36,131 INFO L226 Difference]: Without dead ends: 359953 [2022-01-28 14:45:36,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:45:36,132 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:45:36,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 120 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:45:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359953 states. [2022-01-28 14:45:44,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359953 to 357309. [2022-01-28 14:45:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357309 states, 357308 states have (on average 2.364495057485419) internal successors, (844853), 357308 states have internal predecessors, (844853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:45:47,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357309 states to 357309 states and 844853 transitions. [2022-01-28 14:45:47,344 INFO L78 Accepts]: Start accepts. Automaton has 357309 states and 844853 transitions. Word has length 39 [2022-01-28 14:45:47,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:45:47,344 INFO L470 AbstractCegarLoop]: Abstraction has 357309 states and 844853 transitions. [2022-01-28 14:45:47,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:45:47,344 INFO L276 IsEmpty]: Start isEmpty. Operand 357309 states and 844853 transitions. [2022-01-28 14:45:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 14:45:47,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:45:47,417 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:45:47,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-28 14:45:47,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:45:47,627 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:45:47,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:45:47,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1663842512, now seen corresponding path program 79 times [2022-01-28 14:45:47,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:45:47,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352389415] [2022-01-28 14:45:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:45:47,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:45:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:45:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:45:47,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:45:47,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352389415] [2022-01-28 14:45:47,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352389415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:45:47,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929122106] [2022-01-28 14:45:47,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:45:47,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:45:47,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:45:47,657 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:45:47,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-28 14:45:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:45:47,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:45:47,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:45:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:45:47,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:45:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:45:47,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929122106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:45:47,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:45:47,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-01-28 14:45:47,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363763440] [2022-01-28 14:45:47,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:45:47,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 14:45:47,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:45:47,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 14:45:47,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-28 14:45:47,812 INFO L87 Difference]: Start difference. First operand 357309 states and 844853 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) [2022-01-28 14:45:50,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:45:50,202 INFO L93 Difference]: Finished difference Result 357767 states and 843492 transitions. [2022-01-28 14:45:50,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:45:50,202 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 39 [2022-01-28 14:45:50,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:45:52,135 INFO L225 Difference]: With dead ends: 357767 [2022-01-28 14:45:52,135 INFO L226 Difference]: Without dead ends: 357755 [2022-01-28 14:45:52,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-28 14:45:52,136 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 84 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:45:52,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 142 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:45:52,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357755 states. [2022-01-28 14:45:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357755 to 350533. [2022-01-28 14:45:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350533 states, 350532 states have (on average 2.362486163888033) internal successors, (828127), 350532 states have internal predecessors, (828127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:01,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350533 states to 350533 states and 828127 transitions. [2022-01-28 14:46:01,617 INFO L78 Accepts]: Start accepts. Automaton has 350533 states and 828127 transitions. Word has length 39 [2022-01-28 14:46:01,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:46:01,617 INFO L470 AbstractCegarLoop]: Abstraction has 350533 states and 828127 transitions. [2022-01-28 14:46:01,617 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) [2022-01-28 14:46:01,617 INFO L276 IsEmpty]: Start isEmpty. Operand 350533 states and 828127 transitions. [2022-01-28 14:46:01,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-28 14:46:01,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:46:01,710 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:46:01,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-01-28 14:46:01,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-01-28 14:46:01,926 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:46:01,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:46:01,926 INFO L85 PathProgramCache]: Analyzing trace with hash -82315980, now seen corresponding path program 80 times [2022-01-28 14:46:01,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:46:01,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886152867] [2022-01-28 14:46:01,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:46:01,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:46:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:46:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:46:01,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:46:01,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886152867] [2022-01-28 14:46:01,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886152867] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:46:01,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384255906] [2022-01-28 14:46:01,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:46:01,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:01,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:46:01,984 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:46:01,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-28 14:46:02,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:46:02,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:46:02,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 14:46:02,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:46:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:46:02,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:46:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:46:02,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384255906] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:46:02,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:46:02,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-01-28 14:46:02,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331469601] [2022-01-28 14:46:02,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:46:02,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:46:02,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:46:02,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:46:02,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:46:02,631 INFO L87 Difference]: Start difference. First operand 350533 states and 828127 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:04,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:46:04,164 INFO L93 Difference]: Finished difference Result 257099 states and 593352 transitions. [2022-01-28 14:46:04,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:46:04,164 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-28 14:46:04,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:46:04,885 INFO L225 Difference]: With dead ends: 257099 [2022-01-28 14:46:04,885 INFO L226 Difference]: Without dead ends: 257099 [2022-01-28 14:46:04,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:46:04,886 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 216 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:46:04,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 466 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:46:05,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257099 states. [2022-01-28 14:46:09,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257099 to 150344. [2022-01-28 14:46:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150344 states, 150343 states have (on average 2.301171321577992) internal successors, (345965), 150343 states have internal predecessors, (345965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150344 states to 150344 states and 345965 transitions. [2022-01-28 14:46:10,629 INFO L78 Accepts]: Start accepts. Automaton has 150344 states and 345965 transitions. Word has length 41 [2022-01-28 14:46:10,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:46:10,629 INFO L470 AbstractCegarLoop]: Abstraction has 150344 states and 345965 transitions. [2022-01-28 14:46:10,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:10,629 INFO L276 IsEmpty]: Start isEmpty. Operand 150344 states and 345965 transitions. [2022-01-28 14:46:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-28 14:46:10,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:46:10,687 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:46:10,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-28 14:46:10,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:10,903 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:46:10,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:46:10,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1495522452, now seen corresponding path program 81 times [2022-01-28 14:46:10,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:46:10,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219610763] [2022-01-28 14:46:10,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:46:10,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:46:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:46:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:46:10,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:46:10,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219610763] [2022-01-28 14:46:10,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219610763] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:46:10,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881429638] [2022-01-28 14:46:10,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:46:10,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:10,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:46:10,959 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:46:10,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-28 14:46:10,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 14:46:10,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:46:10,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 14:46:10,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:46:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:46:11,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:46:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:46:11,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881429638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:46:11,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:46:11,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-01-28 14:46:11,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002372242] [2022-01-28 14:46:11,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:46:11,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:46:11,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:46:11,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:46:11,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:46:11,130 INFO L87 Difference]: Start difference. First operand 150344 states and 345965 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:12,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:46:12,262 INFO L93 Difference]: Finished difference Result 144159 states and 325044 transitions. [2022-01-28 14:46:12,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 14:46:12,262 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-28 14:46:12,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:46:12,595 INFO L225 Difference]: With dead ends: 144159 [2022-01-28 14:46:12,595 INFO L226 Difference]: Without dead ends: 144001 [2022-01-28 14:46:12,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:46:12,596 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 494 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:46:12,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 354 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:46:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144001 states. [2022-01-28 14:46:14,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144001 to 131031. [2022-01-28 14:46:15,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131031 states, 131030 states have (on average 2.254582919941998) internal successors, (295418), 131030 states have internal predecessors, (295418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:15,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131031 states to 131031 states and 295418 transitions. [2022-01-28 14:46:15,500 INFO L78 Accepts]: Start accepts. Automaton has 131031 states and 295418 transitions. Word has length 41 [2022-01-28 14:46:15,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:46:15,500 INFO L470 AbstractCegarLoop]: Abstraction has 131031 states and 295418 transitions. [2022-01-28 14:46:15,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:15,500 INFO L276 IsEmpty]: Start isEmpty. Operand 131031 states and 295418 transitions. [2022-01-28 14:46:15,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-28 14:46:15,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:46:15,565 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:46:15,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-28 14:46:15,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:15,782 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:46:15,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:46:15,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1555357781, now seen corresponding path program 82 times [2022-01-28 14:46:15,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:46:15,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337222041] [2022-01-28 14:46:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:46:15,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:46:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:46:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:46:15,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:46:15,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337222041] [2022-01-28 14:46:15,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337222041] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:46:15,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843935672] [2022-01-28 14:46:15,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:46:15,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:15,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:46:15,938 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:46:15,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-28 14:46:15,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:46:15,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:46:15,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:46:15,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:46:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:46:16,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:46:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:46:16,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843935672] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:46:16,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:46:16,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 27 [2022-01-28 14:46:16,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237790208] [2022-01-28 14:46:16,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:46:16,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 14:46:16,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:46:16,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 14:46:16,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:46:16,897 INFO L87 Difference]: Start difference. First operand 131031 states and 295418 transitions. Second operand has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:19,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:46:19,085 INFO L93 Difference]: Finished difference Result 155842 states and 350763 transitions. [2022-01-28 14:46:19,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-28 14:46:19,085 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-28 14:46:19,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:46:19,472 INFO L225 Difference]: With dead ends: 155842 [2022-01-28 14:46:19,472 INFO L226 Difference]: Without dead ends: 155767 [2022-01-28 14:46:19,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=494, Invalid=4336, Unknown=0, NotChecked=0, Total=4830 [2022-01-28 14:46:19,473 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 506 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:46:19,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 1454 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:46:19,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155767 states. [2022-01-28 14:46:22,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155767 to 134288. [2022-01-28 14:46:22,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134288 states, 134287 states have (on average 2.2562198872563988) internal successors, (302981), 134287 states have internal predecessors, (302981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:23,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134288 states to 134288 states and 302981 transitions. [2022-01-28 14:46:23,206 INFO L78 Accepts]: Start accepts. Automaton has 134288 states and 302981 transitions. Word has length 42 [2022-01-28 14:46:23,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:46:23,206 INFO L470 AbstractCegarLoop]: Abstraction has 134288 states and 302981 transitions. [2022-01-28 14:46:23,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:23,206 INFO L276 IsEmpty]: Start isEmpty. Operand 134288 states and 302981 transitions. [2022-01-28 14:46:23,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-28 14:46:23,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:46:23,261 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:46:23,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-01-28 14:46:23,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:23,470 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:46:23,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:46:23,470 INFO L85 PathProgramCache]: Analyzing trace with hash 80278243, now seen corresponding path program 83 times [2022-01-28 14:46:23,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:46:23,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014751541] [2022-01-28 14:46:23,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:46:23,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:46:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:46:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:46:23,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:46:23,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014751541] [2022-01-28 14:46:23,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014751541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:46:23,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60969573] [2022-01-28 14:46:23,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:46:23,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:23,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:46:23,655 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:46:23,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-28 14:46:23,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-28 14:46:23,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:46:23,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:46:23,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:46:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:46:23,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:46:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:46:24,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60969573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:46:24,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:46:24,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 27 [2022-01-28 14:46:24,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440257025] [2022-01-28 14:46:24,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:46:24,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 14:46:24,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:46:24,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 14:46:24,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:46:24,284 INFO L87 Difference]: Start difference. First operand 134288 states and 302981 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:26,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:46:26,682 INFO L93 Difference]: Finished difference Result 163784 states and 369053 transitions. [2022-01-28 14:46:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-28 14:46:26,683 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-28 14:46:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:46:27,065 INFO L225 Difference]: With dead ends: 163784 [2022-01-28 14:46:27,065 INFO L226 Difference]: Without dead ends: 163678 [2022-01-28 14:46:27,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=429, Invalid=3231, Unknown=0, NotChecked=0, Total=3660 [2022-01-28 14:46:27,065 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 373 mSDsluCounter, 1998 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1743 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:46:27,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 1743 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:46:27,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163678 states. [2022-01-28 14:46:29,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163678 to 142342. [2022-01-28 14:46:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142342 states, 142341 states have (on average 2.2571360324853695) internal successors, (321283), 142341 states have internal predecessors, (321283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:30,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142342 states to 142342 states and 321283 transitions. [2022-01-28 14:46:30,543 INFO L78 Accepts]: Start accepts. Automaton has 142342 states and 321283 transitions. Word has length 42 [2022-01-28 14:46:30,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:46:30,543 INFO L470 AbstractCegarLoop]: Abstraction has 142342 states and 321283 transitions. [2022-01-28 14:46:30,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 142342 states and 321283 transitions. [2022-01-28 14:46:30,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-28 14:46:30,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:46:30,604 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:46:30,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-28 14:46:30,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:30,820 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:46:30,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:46:30,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2095685291, now seen corresponding path program 84 times [2022-01-28 14:46:30,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:46:30,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884620057] [2022-01-28 14:46:30,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:46:30,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:46:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:46:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:46:30,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:46:30,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884620057] [2022-01-28 14:46:30,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884620057] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:46:30,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746131258] [2022-01-28 14:46:30,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:46:30,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:30,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:46:30,978 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:46:30,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-28 14:46:31,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-28 14:46:31,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:46:31,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:46:31,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:46:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:46:31,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:46:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:46:31,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746131258] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:46:31,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:46:31,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-01-28 14:46:31,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639794303] [2022-01-28 14:46:31,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:46:31,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:46:31,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:46:31,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:46:31,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:46:31,598 INFO L87 Difference]: Start difference. First operand 142342 states and 321283 transitions. Second operand has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:34,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:46:34,238 INFO L93 Difference]: Finished difference Result 179901 states and 405654 transitions. [2022-01-28 14:46:34,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-28 14:46:34,238 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-28 14:46:34,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:46:34,661 INFO L225 Difference]: With dead ends: 179901 [2022-01-28 14:46:34,662 INFO L226 Difference]: Without dead ends: 179789 [2022-01-28 14:46:34,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=600, Invalid=4950, Unknown=0, NotChecked=0, Total=5550 [2022-01-28 14:46:34,662 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 462 mSDsluCounter, 2156 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1952 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:46:34,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 1952 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1550 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:46:34,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179789 states. [2022-01-28 14:46:38,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179789 to 152957. [2022-01-28 14:46:38,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152957 states, 152956 states have (on average 2.259434085619394) internal successors, (345594), 152956 states have internal predecessors, (345594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:39,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152957 states to 152957 states and 345594 transitions. [2022-01-28 14:46:39,052 INFO L78 Accepts]: Start accepts. Automaton has 152957 states and 345594 transitions. Word has length 42 [2022-01-28 14:46:39,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:46:39,053 INFO L470 AbstractCegarLoop]: Abstraction has 152957 states and 345594 transitions. [2022-01-28 14:46:39,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:39,053 INFO L276 IsEmpty]: Start isEmpty. Operand 152957 states and 345594 transitions. [2022-01-28 14:46:39,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-28 14:46:39,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:46:39,113 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:46:39,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-28 14:46:39,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-01-28 14:46:39,332 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:46:39,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:46:39,332 INFO L85 PathProgramCache]: Analyzing trace with hash -817478237, now seen corresponding path program 85 times [2022-01-28 14:46:39,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:46:39,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850735880] [2022-01-28 14:46:39,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:46:39,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:46:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:46:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:46:39,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:46:39,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850735880] [2022-01-28 14:46:39,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850735880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:46:39,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269013980] [2022-01-28 14:46:39,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:46:39,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:39,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:46:39,496 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:46:39,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-28 14:46:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:46:39,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:46:39,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:46:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:46:39,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:46:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:46:40,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269013980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:46:40,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:46:40,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 27 [2022-01-28 14:46:40,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594078367] [2022-01-28 14:46:40,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:46:40,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 14:46:40,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:46:40,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 14:46:40,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:46:40,148 INFO L87 Difference]: Start difference. First operand 152957 states and 345594 transitions. Second operand has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:46:43,059 INFO L93 Difference]: Finished difference Result 171427 states and 387538 transitions. [2022-01-28 14:46:43,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-28 14:46:43,059 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-28 14:46:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:46:44,033 INFO L225 Difference]: With dead ends: 171427 [2022-01-28 14:46:44,033 INFO L226 Difference]: Without dead ends: 171305 [2022-01-28 14:46:44,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=666, Invalid=5186, Unknown=0, NotChecked=0, Total=5852 [2022-01-28 14:46:44,034 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 487 mSDsluCounter, 1400 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:46:44,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 1294 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:46:44,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171305 states. [2022-01-28 14:46:46,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171305 to 155677. [2022-01-28 14:46:47,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155677 states, 155676 states have (on average 2.2593334874996787) internal successors, (351724), 155676 states have internal predecessors, (351724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:47,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155677 states to 155677 states and 351724 transitions. [2022-01-28 14:46:47,870 INFO L78 Accepts]: Start accepts. Automaton has 155677 states and 351724 transitions. Word has length 42 [2022-01-28 14:46:47,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:46:47,870 INFO L470 AbstractCegarLoop]: Abstraction has 155677 states and 351724 transitions. [2022-01-28 14:46:47,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:47,870 INFO L276 IsEmpty]: Start isEmpty. Operand 155677 states and 351724 transitions. [2022-01-28 14:46:47,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-28 14:46:47,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:46:47,944 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:46:47,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-01-28 14:46:48,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-01-28 14:46:48,161 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:46:48,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:46:48,161 INFO L85 PathProgramCache]: Analyzing trace with hash -873008797, now seen corresponding path program 86 times [2022-01-28 14:46:48,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:46:48,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621832354] [2022-01-28 14:46:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:46:48,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:46:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:46:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:46:48,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:46:48,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621832354] [2022-01-28 14:46:48,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621832354] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:46:48,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019233866] [2022-01-28 14:46:48,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:46:48,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:48,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:46:48,320 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:46:48,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-28 14:46:48,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:46:48,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:46:48,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:46:48,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:46:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:46:48,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:46:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:46:48,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019233866] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:46:48,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:46:48,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 26 [2022-01-28 14:46:48,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532949975] [2022-01-28 14:46:48,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:46:48,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:46:48,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:46:48,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:46:48,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:46:48,984 INFO L87 Difference]: Start difference. First operand 155677 states and 351724 transitions. Second operand has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:51,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:46:51,355 INFO L93 Difference]: Finished difference Result 190477 states and 430272 transitions. [2022-01-28 14:46:51,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-28 14:46:51,356 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-28 14:46:51,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:46:51,849 INFO L225 Difference]: With dead ends: 190477 [2022-01-28 14:46:51,849 INFO L226 Difference]: Without dead ends: 190347 [2022-01-28 14:46:51,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=348, Invalid=2958, Unknown=0, NotChecked=0, Total=3306 [2022-01-28 14:46:51,850 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 350 mSDsluCounter, 1522 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:46:51,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1389 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:46:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190347 states. [2022-01-28 14:46:55,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190347 to 164486. [2022-01-28 14:46:55,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164486 states, 164485 states have (on average 2.259871720825607) internal successors, (371715), 164485 states have internal predecessors, (371715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164486 states to 164486 states and 371715 transitions. [2022-01-28 14:46:56,385 INFO L78 Accepts]: Start accepts. Automaton has 164486 states and 371715 transitions. Word has length 42 [2022-01-28 14:46:56,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:46:56,386 INFO L470 AbstractCegarLoop]: Abstraction has 164486 states and 371715 transitions. [2022-01-28 14:46:56,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:56,386 INFO L276 IsEmpty]: Start isEmpty. Operand 164486 states and 371715 transitions. [2022-01-28 14:46:56,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-28 14:46:56,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:46:56,461 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:46:56,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-28 14:46:56,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:56,678 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:46:56,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:46:56,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1458533117, now seen corresponding path program 87 times [2022-01-28 14:46:56,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:46:56,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073387166] [2022-01-28 14:46:56,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:46:56,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:46:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:46:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:46:56,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:46:56,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073387166] [2022-01-28 14:46:56,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073387166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:46:56,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984810637] [2022-01-28 14:46:56,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:46:56,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:56,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:46:56,870 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:46:56,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-28 14:46:56,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 14:46:56,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:46:56,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:46:56,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:46:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:46:57,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:46:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-28 14:46:57,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984810637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:46:57,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:46:57,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 29 [2022-01-28 14:46:57,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651608539] [2022-01-28 14:46:57,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:46:57,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 14:46:57,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:46:57,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 14:46:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:46:57,624 INFO L87 Difference]: Start difference. First operand 164486 states and 371715 transitions. Second operand has 30 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 29 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) [2022-01-28 14:47:00,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:47:00,780 INFO L93 Difference]: Finished difference Result 230260 states and 519826 transitions. [2022-01-28 14:47:00,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-28 14:47:00,781 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 29 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 42 [2022-01-28 14:47:00,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:47:01,584 INFO L225 Difference]: With dead ends: 230260 [2022-01-28 14:47:01,584 INFO L226 Difference]: Without dead ends: 230067 [2022-01-28 14:47:01,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=560, Invalid=4842, Unknown=0, NotChecked=0, Total=5402 [2022-01-28 14:47:01,585 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 403 mSDsluCounter, 2682 mSDsCounter, 0 mSdLazyCounter, 1883 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 2507 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:47:01,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 2507 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1883 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 14:47:02,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230067 states. [2022-01-28 14:47:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230067 to 171304. [2022-01-28 14:47:06,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171304 states, 171303 states have (on average 2.257812180755737) internal successors, (386770), 171303 states have internal predecessors, (386770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:47:06,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171304 states to 171304 states and 386770 transitions. [2022-01-28 14:47:06,828 INFO L78 Accepts]: Start accepts. Automaton has 171304 states and 386770 transitions. Word has length 42 [2022-01-28 14:47:06,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:47:06,828 INFO L470 AbstractCegarLoop]: Abstraction has 171304 states and 386770 transitions. [2022-01-28 14:47:06,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 29 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) [2022-01-28 14:47:06,828 INFO L276 IsEmpty]: Start isEmpty. Operand 171304 states and 386770 transitions. [2022-01-28 14:47:06,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-28 14:47:06,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:47:06,928 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:47:06,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-01-28 14:47:07,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:47:07,130 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:47:07,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:47:07,131 INFO L85 PathProgramCache]: Analyzing trace with hash -641069333, now seen corresponding path program 88 times [2022-01-28 14:47:07,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:47:07,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390199736] [2022-01-28 14:47:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:47:07,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:47:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:47:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:47:07,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:47:07,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390199736] [2022-01-28 14:47:07,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390199736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:47:07,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997876188] [2022-01-28 14:47:07,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:47:07,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:47:07,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:47:07,283 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:47:07,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-28 14:47:07,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:47:07,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:47:07,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:47:07,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:47:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:47:07,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:47:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:47:08,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997876188] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:47:08,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:47:08,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 28 [2022-01-28 14:47:08,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149062670] [2022-01-28 14:47:08,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:47:08,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 14:47:08,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:47:08,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 14:47:08,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:47:08,250 INFO L87 Difference]: Start difference. First operand 171304 states and 386770 transitions. Second operand has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:47:10,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:47:10,082 INFO L93 Difference]: Finished difference Result 185433 states and 417528 transitions. [2022-01-28 14:47:10,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-28 14:47:10,083 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-28 14:47:10,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:47:10,646 INFO L225 Difference]: With dead ends: 185433 [2022-01-28 14:47:10,646 INFO L226 Difference]: Without dead ends: 185335 [2022-01-28 14:47:10,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=331, Invalid=2861, Unknown=0, NotChecked=0, Total=3192 [2022-01-28 14:47:10,647 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 399 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:47:10,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 1422 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:47:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185335 states. Received shutdown request... [2022-01-28 14:47:12,842 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-28 14:47:12,842 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-28 14:47:13,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-01-28 14:47:13,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2022-01-28 14:47:14,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185335 to 174408. [2022-01-28 14:47:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174408 states, 174407 states have (on average 2.2562454488638646) internal successors, (393505), 174407 states have internal predecessors, (393505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:47:14,687 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-28 14:47:14,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-28 14:47:14,688 WARN L594 AbstractCegarLoop]: Verification canceled: while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). [2022-01-28 14:47:14,689 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-28 14:47:14,689 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-28 14:47:14,692 INFO L732 BasicCegarLoop]: Path program histogram: [88, 9, 2, 1, 1] [2022-01-28 14:47:14,709 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-28 14:47:14,709 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-28 14:47:14,725 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 02:47:14 BasicIcfg [2022-01-28 14:47:14,726 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-28 14:47:14,726 INFO L158 Benchmark]: Toolchain (without parser) took 676297.90ms. Allocated memory was 161.5MB in the beginning and 8.0GB in the end (delta: 7.8GB). Free memory was 126.6MB in the beginning and 5.1GB in the end (delta: -5.0GB). Peak memory consumption was 3.3GB. Max. memory is 8.0GB. [2022-01-28 14:47:14,726 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 161.5MB. Free memory is still 127.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-28 14:47:14,726 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.71ms. Allocated memory is still 161.5MB. Free memory was 126.6MB in the beginning and 125.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-28 14:47:14,726 INFO L158 Benchmark]: Boogie Preprocessor took 13.87ms. Allocated memory is still 161.5MB. Free memory was 125.0MB in the beginning and 124.1MB in the end (delta: 952.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-28 14:47:14,726 INFO L158 Benchmark]: RCFGBuilder took 213.57ms. Allocated memory is still 161.5MB. Free memory was 124.0MB in the beginning and 115.3MB in the end (delta: 8.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-28 14:47:14,726 INFO L158 Benchmark]: TraceAbstraction took 676045.83ms. Allocated memory was 161.5MB in the beginning and 8.0GB in the end (delta: 7.8GB). Free memory was 114.8MB in the beginning and 5.1GB in the end (delta: -5.0GB). Peak memory consumption was 3.2GB. Max. memory is 8.0GB. [2022-01-28 14:47:14,727 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 161.5MB. Free memory is still 127.7MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.71ms. Allocated memory is still 161.5MB. Free memory was 126.6MB in the beginning and 125.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.87ms. Allocated memory is still 161.5MB. Free memory was 125.0MB in the beginning and 124.1MB in the end (delta: 952.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 213.57ms. Allocated memory is still 161.5MB. Free memory was 124.0MB in the beginning and 115.3MB in the end (delta: 8.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 676045.83ms. Allocated memory was 161.5MB in the beginning and 8.0GB in the end (delta: 7.8GB). Free memory was 114.8MB in the beginning and 5.1GB in the end (delta: -5.0GB). Peak memory consumption was 3.2GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 44]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 44]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 39 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 675.9s, OverallIterations: 101, TraceHistogramMax: 5, PathProgramHistogramMax: 88, EmptinessCheckTime: 6.4s, AutomataDifference: 244.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 29078 SdHoareTripleChecker+Valid, 39.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 29078 mSDsluCounter, 117286 SdHoareTripleChecker+Invalid, 33.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 127153 mSDsCounter, 6704 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 102014 IncrementalHoareTripleChecker+Invalid, 108718 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6704 mSolverCounterUnsat, 8602 mSDtfsCounter, 102014 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10386 GetRequests, 5349 SyntacticMatches, 339 SemanticMatches, 4698 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108753 ImplicationChecksByTransitivity, 96.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=357309occurred in iteration=91, InterpolantAutomatonStates: 4199, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 344.9s AutomataMinimizationTime, 101 MinimizatonAttempts, 1174436 StatesRemovedByMinimization, 100 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 55.0s InterpolantComputationTime, 6714 NumberOfCodeBlocks, 6696 NumberOfCodeBlocksAsserted, 393 NumberOfCheckSat, 9751 ConstructedInterpolants, 0 QuantifiedInterpolants, 94367 SizeOfPredicates, 455 NumberOfNonLiveVariables, 6272 ConjunctsInSsa, 1556 ConjunctsInUnsatCore, 297 InterpolantComputations, 3 PerfectInterpolantSequences, 2194/8136 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown