/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-bc289cb [2022-01-28 15:18:31,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-28 15:18:31,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-28 15:18:31,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-28 15:18:31,759 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 15:18:31,793 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-28 15:18:31,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-28 15:18:31,794 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-28 15:18:31,794 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-28 15:18:31,795 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-28 15:18:31,795 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-28 15:18:31,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-28 15:18:31,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-28 15:18:31,796 INFO L138 SettingsManager]: * Use SBE=true [2022-01-28 15:18:31,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-28 15:18:31,797 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-28 15:18:31,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-28 15:18:31,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-28 15:18:31,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-28 15:18:31,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-28 15:18:31,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-28 15:18:31,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-28 15:18:31,798 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-28 15:18:31,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-28 15:18:31,798 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-28 15:18:31,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-28 15:18:31,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-28 15:18:31,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-28 15:18:31,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-28 15:18:31,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-28 15:18:31,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 15:18:31,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-28 15:18:31,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-28 15:18:31,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-28 15:18:31,800 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-28 15:18:31,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-28 15:18:31,800 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-28 15:18:31,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-28 15:18:31,801 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-28 15:18:32,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-28 15:18:32,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-28 15:18:32,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-28 15:18:32,057 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-28 15:18:32,058 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-28 15:18:32,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl [2022-01-28 15:18:32,059 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl' [2022-01-28 15:18:32,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-28 15:18:32,089 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-28 15:18:32,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-28 15:18:32,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-28 15:18:32,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-28 15:18:32,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:18:32" (1/1) ... [2022-01-28 15:18:32,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:18:32" (1/1) ... [2022-01-28 15:18:32,118 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-28 15:18:32,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-28 15:18:32,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-28 15:18:32,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-28 15:18:32,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-28 15:18:32,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:18:32" (1/1) ... [2022-01-28 15:18:32,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:18:32" (1/1) ... [2022-01-28 15:18:32,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:18:32" (1/1) ... [2022-01-28 15:18:32,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:18:32" (1/1) ... [2022-01-28 15:18:32,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:18:32" (1/1) ... [2022-01-28 15:18:32,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:18:32" (1/1) ... [2022-01-28 15:18:32,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:18:32" (1/1) ... [2022-01-28 15:18:32,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-28 15:18:32,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-28 15:18:32,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-28 15:18:32,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-28 15:18:32,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:18:32" (1/1) ... [2022-01-28 15:18:32,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 15:18:32,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:18:32,168 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 15:18:32,192 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 15:18:32,208 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-28 15:18:32,208 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-28 15:18:32,208 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-28 15:18:32,208 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-28 15:18:32,208 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-28 15:18:32,209 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-28 15:18:32,209 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-28 15:18:32,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-28 15:18:32,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-28 15:18:32,209 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-28 15:18:32,209 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-28 15:18:32,209 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-28 15:18:32,210 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-28 15:18:32,210 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-28 15:18:32,210 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-28 15:18:32,211 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 15:18:32,257 INFO L234 CfgBuilder]: Building ICFG [2022-01-28 15:18:32,259 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-28 15:18:32,349 INFO L275 CfgBuilder]: Performing block encoding [2022-01-28 15:18:32,363 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-28 15:18:32,364 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-28 15:18:32,366 INFO L202 PluginConnector]: Adding new model min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:18:32 BoogieIcfgContainer [2022-01-28 15:18:32,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-28 15:18:32,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-28 15:18:32,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-28 15:18:32,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-28 15:18:32,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:18:32" (1/2) ... [2022-01-28 15:18:32,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7075fcd9 and model type min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:18:32, skipping insertion in model container [2022-01-28 15:18:32,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:18:32" (2/2) ... [2022-01-28 15:18:32,378 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc.wvr.bpl [2022-01-28 15:18:32,383 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-28 15:18:32,383 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-28 15:18:32,383 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-28 15:18:32,383 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-28 15:18:32,423 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-01-28 15:18:32,471 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-28 15:18:32,492 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 15:18:32,492 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-01-28 15:18:32,500 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 35 transitions, 102 flow [2022-01-28 15:18:32,689 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 710 states, 709 states have (on average 3.6473906911142455) internal successors, (2586), 709 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:32,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 710 states, 709 states have (on average 3.6473906911142455) internal successors, (2586), 709 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:32,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:18:32,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:32,720 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:32,720 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:32,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:32,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1693976829, now seen corresponding path program 1 times [2022-01-28 15:18:32,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:32,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237917573] [2022-01-28 15:18:32,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:32,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:32,936 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 15:18:32,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:32,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237917573] [2022-01-28 15:18:32,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237917573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:18:32,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:18:32,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 15:18:32,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892312954] [2022-01-28 15:18:32,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:18:32,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:18:32,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:32,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:18:32,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:18:32,995 INFO L87 Difference]: Start difference. First operand has 710 states, 709 states have (on average 3.6473906911142455) internal successors, (2586), 709 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:33,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:33,129 INFO L93 Difference]: Finished difference Result 961 states and 3450 transitions. [2022-01-28 15:18:33,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:18:33,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:18:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:33,163 INFO L225 Difference]: With dead ends: 961 [2022-01-28 15:18:33,163 INFO L226 Difference]: Without dead ends: 614 [2022-01-28 15:18:33,166 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 15:18:33,178 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 29 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:33,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 71 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:18:33,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-01-28 15:18:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2022-01-28 15:18:33,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.592169657422512) internal successors, (2202), 613 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2202 transitions. [2022-01-28 15:18:33,283 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2202 transitions. Word has length 23 [2022-01-28 15:18:33,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:33,284 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 2202 transitions. [2022-01-28 15:18:33,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:33,286 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2202 transitions. [2022-01-28 15:18:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:18:33,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:33,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:33,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-28 15:18:33,289 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:33,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:33,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1387371365, now seen corresponding path program 2 times [2022-01-28 15:18:33,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:33,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309720530] [2022-01-28 15:18:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:33,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:33,383 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 15:18:33,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:33,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309720530] [2022-01-28 15:18:33,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309720530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:18:33,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:18:33,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 15:18:33,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697181942] [2022-01-28 15:18:33,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:18:33,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:18:33,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:33,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:18:33,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:18:33,388 INFO L87 Difference]: Start difference. First operand 614 states and 2202 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:33,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:33,564 INFO L93 Difference]: Finished difference Result 2435 states and 8733 transitions. [2022-01-28 15:18:33,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 15:18:33,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:18:33,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:33,577 INFO L225 Difference]: With dead ends: 2435 [2022-01-28 15:18:33,578 INFO L226 Difference]: Without dead ends: 1497 [2022-01-28 15:18:33,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:18:33,580 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 99 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:33,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 150 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:18:33,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2022-01-28 15:18:33,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 859. [2022-01-28 15:18:33,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.5442890442890445) internal successors, (3041), 858 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:33,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 3041 transitions. [2022-01-28 15:18:33,657 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 3041 transitions. Word has length 23 [2022-01-28 15:18:33,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:33,657 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 3041 transitions. [2022-01-28 15:18:33,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:33,658 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 3041 transitions. [2022-01-28 15:18:33,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:18:33,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:33,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:33,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-28 15:18:33,662 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:33,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:33,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1797120999, now seen corresponding path program 3 times [2022-01-28 15:18:33,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:33,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476378855] [2022-01-28 15:18:33,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:33,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:33,730 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 15:18:33,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:33,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476378855] [2022-01-28 15:18:33,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476378855] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:18:33,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:18:33,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 15:18:33,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706600993] [2022-01-28 15:18:33,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:18:33,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:18:33,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:33,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:18:33,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:18:33,736 INFO L87 Difference]: Start difference. First operand 859 states and 3041 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:33,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:33,911 INFO L93 Difference]: Finished difference Result 3289 states and 11673 transitions. [2022-01-28 15:18:33,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 15:18:33,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:18:33,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:33,928 INFO L225 Difference]: With dead ends: 3289 [2022-01-28 15:18:33,929 INFO L226 Difference]: Without dead ends: 2391 [2022-01-28 15:18:33,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:18:33,934 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 103 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:33,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 162 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:18:33,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2022-01-28 15:18:33,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 910. [2022-01-28 15:18:33,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.553355335533553) internal successors, (3230), 909 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:33,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3230 transitions. [2022-01-28 15:18:33,993 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3230 transitions. Word has length 23 [2022-01-28 15:18:33,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:33,993 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 3230 transitions. [2022-01-28 15:18:33,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:33,993 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3230 transitions. [2022-01-28 15:18:33,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:18:33,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:33,997 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:33,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-28 15:18:33,997 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:33,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:33,998 INFO L85 PathProgramCache]: Analyzing trace with hash 61402933, now seen corresponding path program 4 times [2022-01-28 15:18:33,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:33,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491418041] [2022-01-28 15:18:33,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:33,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:34,047 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 15:18:34,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:34,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491418041] [2022-01-28 15:18:34,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491418041] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:18:34,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:18:34,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 15:18:34,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391423911] [2022-01-28 15:18:34,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:18:34,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:18:34,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:34,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:18:34,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:18:34,049 INFO L87 Difference]: Start difference. First operand 910 states and 3230 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:34,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:34,096 INFO L93 Difference]: Finished difference Result 1081 states and 3814 transitions. [2022-01-28 15:18:34,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:18:34,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:18:34,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:34,102 INFO L225 Difference]: With dead ends: 1081 [2022-01-28 15:18:34,103 INFO L226 Difference]: Without dead ends: 830 [2022-01-28 15:18:34,103 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 15:18:34,104 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 27 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:34,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 66 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:18:34,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-01-28 15:18:34,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 830. [2022-01-28 15:18:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4861278648974667) internal successors, (2890), 829 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:34,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2890 transitions. [2022-01-28 15:18:34,134 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2890 transitions. Word has length 23 [2022-01-28 15:18:34,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:34,135 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2890 transitions. [2022-01-28 15:18:34,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2890 transitions. [2022-01-28 15:18:34,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:18:34,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:34,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:34,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-28 15:18:34,138 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:34,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:34,139 INFO L85 PathProgramCache]: Analyzing trace with hash -432116485, now seen corresponding path program 1 times [2022-01-28 15:18:34,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:34,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860162379] [2022-01-28 15:18:34,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:34,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:34,209 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 15:18:34,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:34,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860162379] [2022-01-28 15:18:34,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860162379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:18:34,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432162148] [2022-01-28 15:18:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:34,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:18:34,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:18:34,212 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 15:18:34,265 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 15:18:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:34,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 15:18:34,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:18:34,415 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 15:18:34,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:18:34,489 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 15:18:34,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432162148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:18:34,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:18:34,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-28 15:18:34,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898070549] [2022-01-28 15:18:34,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:18:34,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 15:18:34,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:34,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 15:18:34,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:18:34,491 INFO L87 Difference]: Start difference. First operand 830 states and 2890 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:34,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:34,593 INFO L93 Difference]: Finished difference Result 1914 states and 6600 transitions. [2022-01-28 15:18:34,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 15:18:34,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 15:18:34,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:34,605 INFO L225 Difference]: With dead ends: 1914 [2022-01-28 15:18:34,606 INFO L226 Difference]: Without dead ends: 1914 [2022-01-28 15:18:34,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-28 15:18:34,607 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 84 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:34,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 97 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:18:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2022-01-28 15:18:34,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1087. [2022-01-28 15:18:34,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.603130755064457) internal successors, (3913), 1086 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3913 transitions. [2022-01-28 15:18:34,651 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3913 transitions. Word has length 25 [2022-01-28 15:18:34,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:34,651 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 3913 transitions. [2022-01-28 15:18:34,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:34,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3913 transitions. [2022-01-28 15:18:34,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:18:34,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:34,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:34,682 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 15:18:34,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:18:34,879 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:34,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:34,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1214414653, now seen corresponding path program 1 times [2022-01-28 15:18:34,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:34,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041388157] [2022-01-28 15:18:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:34,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:34,919 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 15:18:34,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:34,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041388157] [2022-01-28 15:18:34,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041388157] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:18:34,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:18:34,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 15:18:34,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089069593] [2022-01-28 15:18:34,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:18:34,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:18:34,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:34,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:18:34,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:18:34,921 INFO L87 Difference]: Start difference. First operand 1087 states and 3913 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:34,990 INFO L93 Difference]: Finished difference Result 1486 states and 5095 transitions. [2022-01-28 15:18:34,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:18:34,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:18:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:34,999 INFO L225 Difference]: With dead ends: 1486 [2022-01-28 15:18:34,999 INFO L226 Difference]: Without dead ends: 1456 [2022-01-28 15:18:35,000 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 15:18:35,001 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 60 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:35,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 54 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:18:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2022-01-28 15:18:35,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1266. [2022-01-28 15:18:35,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.5177865612648223) internal successors, (4450), 1265 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:35,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4450 transitions. [2022-01-28 15:18:35,041 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4450 transitions. Word has length 25 [2022-01-28 15:18:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:35,041 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 4450 transitions. [2022-01-28 15:18:35,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:35,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4450 transitions. [2022-01-28 15:18:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:18:35,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:35,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:35,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-28 15:18:35,046 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:35,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:35,046 INFO L85 PathProgramCache]: Analyzing trace with hash -831286723, now seen corresponding path program 1 times [2022-01-28 15:18:35,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:35,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579077950] [2022-01-28 15:18:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:35,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:35,077 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 15:18:35,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:35,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579077950] [2022-01-28 15:18:35,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579077950] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:18:35,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:18:35,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 15:18:35,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756689180] [2022-01-28 15:18:35,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:18:35,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:18:35,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:35,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:18:35,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:18:35,079 INFO L87 Difference]: Start difference. First operand 1266 states and 4450 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:35,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:35,151 INFO L93 Difference]: Finished difference Result 1766 states and 6108 transitions. [2022-01-28 15:18:35,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:18:35,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:18:35,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:35,162 INFO L225 Difference]: With dead ends: 1766 [2022-01-28 15:18:35,162 INFO L226 Difference]: Without dead ends: 1644 [2022-01-28 15:18:35,162 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 15:18:35,163 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:35,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 54 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:18:35,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2022-01-28 15:18:35,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1367. [2022-01-28 15:18:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.5439238653001466) internal successors, (4841), 1366 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:35,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4841 transitions. [2022-01-28 15:18:35,207 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4841 transitions. Word has length 25 [2022-01-28 15:18:35,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:35,207 INFO L470 AbstractCegarLoop]: Abstraction has 1367 states and 4841 transitions. [2022-01-28 15:18:35,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:35,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4841 transitions. [2022-01-28 15:18:35,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:18:35,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:35,212 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:35,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-28 15:18:35,212 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:35,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:35,213 INFO L85 PathProgramCache]: Analyzing trace with hash -707926211, now seen corresponding path program 2 times [2022-01-28 15:18:35,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:35,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494637270] [2022-01-28 15:18:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:35,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:35,255 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 15:18:35,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:35,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494637270] [2022-01-28 15:18:35,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494637270] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:18:35,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:18:35,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 15:18:35,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981648373] [2022-01-28 15:18:35,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:18:35,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:18:35,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:35,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:18:35,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:18:35,257 INFO L87 Difference]: Start difference. First operand 1367 states and 4841 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:35,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:35,313 INFO L93 Difference]: Finished difference Result 1634 states and 5618 transitions. [2022-01-28 15:18:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:18:35,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:18:35,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:35,322 INFO L225 Difference]: With dead ends: 1634 [2022-01-28 15:18:35,323 INFO L226 Difference]: Without dead ends: 1526 [2022-01-28 15:18:35,323 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 15:18:35,324 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 61 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:35,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 55 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:18:35,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2022-01-28 15:18:35,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1198. [2022-01-28 15:18:35,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.5129490392648286) internal successors, (4205), 1197 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:35,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4205 transitions. [2022-01-28 15:18:35,387 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4205 transitions. Word has length 25 [2022-01-28 15:18:35,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:35,387 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 4205 transitions. [2022-01-28 15:18:35,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:35,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4205 transitions. [2022-01-28 15:18:35,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:18:35,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:35,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:35,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-28 15:18:35,392 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:35,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:35,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1107714437, now seen corresponding path program 2 times [2022-01-28 15:18:35,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:35,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934017207] [2022-01-28 15:18:35,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:35,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:35,425 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 15:18:35,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:35,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934017207] [2022-01-28 15:18:35,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934017207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:18:35,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:18:35,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 15:18:35,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63296382] [2022-01-28 15:18:35,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:18:35,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:18:35,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:35,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:18:35,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:18:35,427 INFO L87 Difference]: Start difference. First operand 1198 states and 4205 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:35,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:35,501 INFO L93 Difference]: Finished difference Result 1639 states and 5650 transitions. [2022-01-28 15:18:35,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:18:35,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:18:35,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:35,512 INFO L225 Difference]: With dead ends: 1639 [2022-01-28 15:18:35,513 INFO L226 Difference]: Without dead ends: 1541 [2022-01-28 15:18:35,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:18:35,513 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:35,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 56 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:18:35,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2022-01-28 15:18:35,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1175. [2022-01-28 15:18:35,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1174 states have (on average 3.5264054514480407) internal successors, (4140), 1174 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 4140 transitions. [2022-01-28 15:18:35,551 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 4140 transitions. Word has length 25 [2022-01-28 15:18:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:35,551 INFO L470 AbstractCegarLoop]: Abstraction has 1175 states and 4140 transitions. [2022-01-28 15:18:35,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:35,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 4140 transitions. [2022-01-28 15:18:35,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:18:35,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:35,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:35,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-28 15:18:35,555 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:35,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:35,555 INFO L85 PathProgramCache]: Analyzing trace with hash 823736187, now seen corresponding path program 3 times [2022-01-28 15:18:35,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:35,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156561811] [2022-01-28 15:18:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:35,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:35,597 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 15:18:35,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:35,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156561811] [2022-01-28 15:18:35,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156561811] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:18:35,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508936823] [2022-01-28 15:18:35,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:18:35,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:18:35,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:18:35,600 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 15:18:35,631 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 15:18:35,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:18:35,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:18:35,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-28 15:18:35,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:18:35,706 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 15:18:35,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:18:35,766 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 15:18:35,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508936823] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:18:35,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:18:35,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-28 15:18:35,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408994667] [2022-01-28 15:18:35,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:18:35,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 15:18:35,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:35,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 15:18:35,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:18:35,768 INFO L87 Difference]: Start difference. First operand 1175 states and 4140 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 15:18:35,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:35,848 INFO L93 Difference]: Finished difference Result 1245 states and 4400 transitions. [2022-01-28 15:18:35,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 15:18:35,848 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 25 [2022-01-28 15:18:35,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:35,858 INFO L225 Difference]: With dead ends: 1245 [2022-01-28 15:18:35,858 INFO L226 Difference]: Without dead ends: 1159 [2022-01-28 15:18:35,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-28 15:18:35,859 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 55 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:35,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 92 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:18:35,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-01-28 15:18:35,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1012. [2022-01-28 15:18:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 3.5519287833827895) internal successors, (3591), 1011 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:35,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 3591 transitions. [2022-01-28 15:18:35,887 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 3591 transitions. Word has length 25 [2022-01-28 15:18:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:35,888 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 3591 transitions. [2022-01-28 15:18:35,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 15:18:35,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 3591 transitions. [2022-01-28 15:18:35,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:18:35,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:35,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:35,914 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 15:18:36,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-28 15:18:36,115 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:36,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:36,115 INFO L85 PathProgramCache]: Analyzing trace with hash 91352989, now seen corresponding path program 1 times [2022-01-28 15:18:36,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:36,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94971296] [2022-01-28 15:18:36,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:36,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:18:36,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:36,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94971296] [2022-01-28 15:18:36,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94971296] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:18:36,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043561697] [2022-01-28 15:18:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:36,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:18:36,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:18:36,149 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 15:18:36,150 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 15:18:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:36,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-28 15:18:36,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:18:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:18:36,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:18:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:18:36,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043561697] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:18:36,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:18:36,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-28 15:18:36,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887693760] [2022-01-28 15:18:36,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:18:36,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 15:18:36,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:36,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 15:18:36,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:18:36,296 INFO L87 Difference]: Start difference. First operand 1012 states and 3591 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 15:18:36,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:36,377 INFO L93 Difference]: Finished difference Result 1208 states and 4319 transitions. [2022-01-28 15:18:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 15:18:36,377 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 27 [2022-01-28 15:18:36,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:36,382 INFO L225 Difference]: With dead ends: 1208 [2022-01-28 15:18:36,382 INFO L226 Difference]: Without dead ends: 1208 [2022-01-28 15:18:36,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-28 15:18:36,383 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 59 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:36,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 66 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:18:36,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2022-01-28 15:18:36,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1044. [2022-01-28 15:18:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.5618408437200384) internal successors, (3715), 1043 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3715 transitions. [2022-01-28 15:18:36,409 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3715 transitions. Word has length 27 [2022-01-28 15:18:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:36,409 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 3715 transitions. [2022-01-28 15:18:36,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 15:18:36,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3715 transitions. [2022-01-28 15:18:36,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 15:18:36,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:36,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:36,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-28 15:18:36,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:18:36,636 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:36,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1411357505, now seen corresponding path program 1 times [2022-01-28 15:18:36,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:36,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52352258] [2022-01-28 15:18:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:36,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:36,796 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 15:18:36,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:36,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52352258] [2022-01-28 15:18:36,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52352258] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:18:36,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753250383] [2022-01-28 15:18:36,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:36,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:18:36,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:18:36,800 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 15:18:36,807 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 15:18:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:36,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-28 15:18:36,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:18:37,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2022-01-28 15:18:37,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 15:18:37,119 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 15:18:37,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:18:37,612 INFO L354 Elim1Store]: treesize reduction 10, result has 79.6 percent of original size [2022-01-28 15:18:37,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 91 [2022-01-28 15:18:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:18:37,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753250383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:18:37,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:18:37,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-28 15:18:37,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856942152] [2022-01-28 15:18:37,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:18:37,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:18:37,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:37,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:18:37,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:18:37,771 INFO L87 Difference]: Start difference. First operand 1044 states and 3715 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:38,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:38,215 INFO L93 Difference]: Finished difference Result 4135 states and 14907 transitions. [2022-01-28 15:18:38,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 15:18:38,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-28 15:18:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:38,225 INFO L225 Difference]: With dead ends: 4135 [2022-01-28 15:18:38,226 INFO L226 Difference]: Without dead ends: 2563 [2022-01-28 15:18:38,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:18:38,227 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 335 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:38,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 277 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 307 Invalid, 0 Unknown, 178 Unchecked, 0.2s Time] [2022-01-28 15:18:38,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2022-01-28 15:18:38,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 1567. [2022-01-28 15:18:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1566 states have (on average 3.5178799489144317) internal successors, (5509), 1566 states have internal predecessors, (5509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 5509 transitions. [2022-01-28 15:18:38,307 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 5509 transitions. Word has length 29 [2022-01-28 15:18:38,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:38,308 INFO L470 AbstractCegarLoop]: Abstraction has 1567 states and 5509 transitions. [2022-01-28 15:18:38,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:38,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 5509 transitions. [2022-01-28 15:18:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 15:18:38,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:38,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:38,342 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 15:18:38,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:18:38,540 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:38,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:38,540 INFO L85 PathProgramCache]: Analyzing trace with hash -943724415, now seen corresponding path program 2 times [2022-01-28 15:18:38,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:38,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966844881] [2022-01-28 15:18:38,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:38,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:38,601 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 15:18:38,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:38,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966844881] [2022-01-28 15:18:38,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966844881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:18:38,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838000070] [2022-01-28 15:18:38,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:18:38,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:18:38,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:18:38,603 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 15:18:38,632 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 15:18:38,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:18:38,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:18:38,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-28 15:18:38,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:18:38,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:18:38,723 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 15:18:38,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:18:38,832 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 15:18:38,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2022-01-28 15:18:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:18:38,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838000070] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:18:38,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:18:38,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-28 15:18:38,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095834226] [2022-01-28 15:18:38,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:18:38,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 15:18:38,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:38,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 15:18:38,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:18:38,850 INFO L87 Difference]: Start difference. First operand 1567 states and 5509 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:39,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:39,385 INFO L93 Difference]: Finished difference Result 7475 states and 26946 transitions. [2022-01-28 15:18:39,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-28 15:18:39,385 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-28 15:18:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:39,398 INFO L225 Difference]: With dead ends: 7475 [2022-01-28 15:18:39,398 INFO L226 Difference]: Without dead ends: 3223 [2022-01-28 15:18:39,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=719, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:18:39,399 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 358 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:39,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 411 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:18:39,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2022-01-28 15:18:39,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 1476. [2022-01-28 15:18:39,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.4894915254237286) internal successors, (5147), 1475 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:39,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 5147 transitions. [2022-01-28 15:18:39,450 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 5147 transitions. Word has length 29 [2022-01-28 15:18:39,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:39,451 INFO L470 AbstractCegarLoop]: Abstraction has 1476 states and 5147 transitions. [2022-01-28 15:18:39,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:39,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 5147 transitions. [2022-01-28 15:18:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 15:18:39,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:39,455 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:39,478 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 15:18:39,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-28 15:18:39,672 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:39,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:39,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1636464349, now seen corresponding path program 3 times [2022-01-28 15:18:39,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:39,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351056871] [2022-01-28 15:18:39,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:39,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:39,788 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 15:18:39,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:39,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351056871] [2022-01-28 15:18:39,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351056871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:18:39,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505541924] [2022-01-28 15:18:39,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:18:39,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:18:39,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:18:39,790 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 15:18:39,791 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 15:18:39,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:18:39,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:18:39,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-28 15:18:39,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:18:39,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-28 15:18:40,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:18:40,035 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 15:18:40,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:18:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:18:40,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505541924] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-28 15:18:40,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-28 15:18:40,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 17 [2022-01-28 15:18:40,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726093569] [2022-01-28 15:18:40,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:18:40,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 15:18:40,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:40,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 15:18:40,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:18:40,339 INFO L87 Difference]: Start difference. First operand 1476 states and 5147 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:40,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:40,500 INFO L93 Difference]: Finished difference Result 2844 states and 10081 transitions. [2022-01-28 15:18:40,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:18:40,501 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 15:18:40,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:40,507 INFO L225 Difference]: With dead ends: 2844 [2022-01-28 15:18:40,507 INFO L226 Difference]: Without dead ends: 2109 [2022-01-28 15:18:40,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:18:40,508 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 113 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:40,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 131 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:18:40,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2022-01-28 15:18:40,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 1216. [2022-01-28 15:18:40,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 3.405761316872428) internal successors, (4138), 1215 states have internal predecessors, (4138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:40,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 4138 transitions. [2022-01-28 15:18:40,542 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 4138 transitions. Word has length 29 [2022-01-28 15:18:40,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:40,542 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 4138 transitions. [2022-01-28 15:18:40,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:40,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 4138 transitions. [2022-01-28 15:18:40,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 15:18:40,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:40,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:40,571 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 15:18:40,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:18:40,769 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:40,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2131567041, now seen corresponding path program 4 times [2022-01-28 15:18:40,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:40,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213545244] [2022-01-28 15:18:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:40,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:40,823 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 15:18:40,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:40,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213545244] [2022-01-28 15:18:40,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213545244] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:18:40,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75125025] [2022-01-28 15:18:40,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:18:40,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:18:40,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:18:40,825 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 15:18:40,836 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 15:18:40,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:18:40,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:18:40,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 15:18:40,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:18:40,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-28 15:18:40,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:18:40,979 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 15:18:40,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:18:41,137 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 15:18:41,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 47 [2022-01-28 15:18:41,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:18:41,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75125025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:18:41,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:18:41,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-01-28 15:18:41,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789234797] [2022-01-28 15:18:41,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:18:41,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:18:41,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:41,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:18:41,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:18:41,167 INFO L87 Difference]: Start difference. First operand 1216 states and 4138 transitions. Second operand has 14 states, 14 states have (on average 4.0) 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 15:18:41,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:41,390 INFO L93 Difference]: Finished difference Result 1951 states and 6704 transitions. [2022-01-28 15:18:41,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:18:41,390 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) 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 29 [2022-01-28 15:18:41,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:41,394 INFO L225 Difference]: With dead ends: 1951 [2022-01-28 15:18:41,394 INFO L226 Difference]: Without dead ends: 1041 [2022-01-28 15:18:41,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:18:41,395 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 276 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:41,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 173 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:18:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-01-28 15:18:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 697. [2022-01-28 15:18:41,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.507183908045977) internal successors, (2441), 696 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2441 transitions. [2022-01-28 15:18:41,414 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2441 transitions. Word has length 29 [2022-01-28 15:18:41,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:41,414 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 2441 transitions. [2022-01-28 15:18:41,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) 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 15:18:41,414 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2441 transitions. [2022-01-28 15:18:41,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-28 15:18:41,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:41,416 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:41,438 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 15:18:41,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:18:41,635 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:41,636 INFO L85 PathProgramCache]: Analyzing trace with hash 711837281, now seen corresponding path program 5 times [2022-01-28 15:18:41,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:41,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385159389] [2022-01-28 15:18:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:41,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:18:41,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:41,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385159389] [2022-01-28 15:18:41,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385159389] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:18:41,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068641478] [2022-01-28 15:18:41,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:18:41,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:18:41,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:18:41,675 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 15:18:41,676 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 15:18:41,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:18:41,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:18:41,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:18:41,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:18:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:18:41,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:18:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:18:41,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068641478] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:18:41,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:18:41,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-28 15:18:41,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667258527] [2022-01-28 15:18:41,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:18:41,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 15:18:41,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:41,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 15:18:41,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-28 15:18:41,835 INFO L87 Difference]: Start difference. First operand 697 states and 2441 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:41,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:41,952 INFO L93 Difference]: Finished difference Result 1665 states and 5828 transitions. [2022-01-28 15:18:41,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 15:18:41,953 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-28 15:18:41,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:41,958 INFO L225 Difference]: With dead ends: 1665 [2022-01-28 15:18:41,958 INFO L226 Difference]: Without dead ends: 1651 [2022-01-28 15:18:41,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 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 15:18:41,959 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 172 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:41,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 91 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:18:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2022-01-28 15:18:41,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1118. [2022-01-28 15:18:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.7090420769919428) internal successors, (4143), 1117 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4143 transitions. [2022-01-28 15:18:41,987 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4143 transitions. Word has length 31 [2022-01-28 15:18:41,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:41,987 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 4143 transitions. [2022-01-28 15:18:41,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:41,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4143 transitions. [2022-01-28 15:18:41,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-28 15:18:41,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:41,990 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:42,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-28 15:18:42,210 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,SelfDestructingSolverStorable15 [2022-01-28 15:18:42,211 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:42,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:42,211 INFO L85 PathProgramCache]: Analyzing trace with hash 451152861, now seen corresponding path program 6 times [2022-01-28 15:18:42,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:42,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923640674] [2022-01-28 15:18:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:42,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:18:42,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:42,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923640674] [2022-01-28 15:18:42,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923640674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:18:42,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134122437] [2022-01-28 15:18:42,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:18:42,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:18:42,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:18:42,241 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 15:18:42,243 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 15:18:42,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:18:42,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:18:42,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 15:18:42,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:18:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:18:42,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:18:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:18:42,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134122437] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:18:42,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:18:42,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-28 15:18:42,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317265265] [2022-01-28 15:18:42,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:18:42,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 15:18:42,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:42,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 15:18:42,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-28 15:18:42,414 INFO L87 Difference]: Start difference. First operand 1118 states and 4143 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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 15:18:43,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:43,030 INFO L93 Difference]: Finished difference Result 5485 states and 19215 transitions. [2022-01-28 15:18:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-28 15:18:43,030 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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 31 [2022-01-28 15:18:43,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:43,050 INFO L225 Difference]: With dead ends: 5485 [2022-01-28 15:18:43,050 INFO L226 Difference]: Without dead ends: 5485 [2022-01-28 15:18:43,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1299, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 15:18:43,052 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 487 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:43,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 248 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:18:43,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5485 states. [2022-01-28 15:18:43,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5485 to 1710. [2022-01-28 15:18:43,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 3.904622586307782) internal successors, (6673), 1709 states have internal predecessors, (6673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:43,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 6673 transitions. [2022-01-28 15:18:43,143 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 6673 transitions. Word has length 31 [2022-01-28 15:18:43,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:43,143 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 6673 transitions. [2022-01-28 15:18:43,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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 15:18:43,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 6673 transitions. [2022-01-28 15:18:43,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 15:18:43,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:43,148 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:43,173 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 15:18:43,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-28 15:18:43,363 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:43,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:43,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1768247525, now seen corresponding path program 7 times [2022-01-28 15:18:43,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:43,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279370110] [2022-01-28 15:18:43,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:43,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 15:18:43,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:43,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279370110] [2022-01-28 15:18:43,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279370110] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:18:43,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787702462] [2022-01-28 15:18:43,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:18:43,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:18:43,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:18:43,405 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 15:18:43,417 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 15:18:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:43,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:18:43,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:18:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 15:18:43,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:18:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 15:18:43,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787702462] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:18:43,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:18:43,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-28 15:18:43,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797712266] [2022-01-28 15:18:43,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:18:43,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 15:18:43,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:43,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 15:18:43,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-28 15:18:43,600 INFO L87 Difference]: Start difference. First operand 1710 states and 6673 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 15:18:43,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:43,740 INFO L93 Difference]: Finished difference Result 3346 states and 12591 transitions. [2022-01-28 15:18:43,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 15:18:43,741 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 33 [2022-01-28 15:18:43,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:43,754 INFO L225 Difference]: With dead ends: 3346 [2022-01-28 15:18:43,754 INFO L226 Difference]: Without dead ends: 3346 [2022-01-28 15:18:43,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 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 15:18:43,755 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 115 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:43,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 130 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:18:43,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3346 states. [2022-01-28 15:18:43,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3346 to 2425. [2022-01-28 15:18:43,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 3.9834983498349836) internal successors, (9656), 2424 states have internal predecessors, (9656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:43,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 9656 transitions. [2022-01-28 15:18:43,831 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 9656 transitions. Word has length 33 [2022-01-28 15:18:43,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:43,831 INFO L470 AbstractCegarLoop]: Abstraction has 2425 states and 9656 transitions. [2022-01-28 15:18:43,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 15:18:43,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 9656 transitions. [2022-01-28 15:18:43,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-28 15:18:43,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:43,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:43,860 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 15:18:44,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-28 15:18:44,051 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:44,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:44,052 INFO L85 PathProgramCache]: Analyzing trace with hash -125943131, now seen corresponding path program 8 times [2022-01-28 15:18:44,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:44,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110595145] [2022-01-28 15:18:44,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:44,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:18:44,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:44,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110595145] [2022-01-28 15:18:44,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110595145] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:18:44,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857711500] [2022-01-28 15:18:44,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:18:44,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:18:44,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:18:44,211 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 15:18:44,212 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 15:18:44,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:18:44,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:18:44,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:18:44,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:18:44,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-01-28 15:18:44,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2022-01-28 15:18:44,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 15:18:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:18:44,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:18:44,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:18:44,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 206 treesize of output 220 [2022-01-28 15:18:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:18:45,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857711500] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:18:45,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:18:45,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-28 15:18:45,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018093567] [2022-01-28 15:18:45,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:18:45,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:18:45,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:45,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:18:45,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:18:45,378 INFO L87 Difference]: Start difference. First operand 2425 states and 9656 transitions. Second operand has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 20 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 15:18:45,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:18:45,904 INFO L93 Difference]: Finished difference Result 5719 states and 22595 transitions. [2022-01-28 15:18:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 15:18:45,904 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 20 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 35 [2022-01-28 15:18:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:18:45,914 INFO L225 Difference]: With dead ends: 5719 [2022-01-28 15:18:45,914 INFO L226 Difference]: Without dead ends: 2651 [2022-01-28 15:18:45,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:18:45,915 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 193 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:18:45,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 436 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 731 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-01-28 15:18:45,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2022-01-28 15:18:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2473. [2022-01-28 15:18:45,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2472 states have (on average 3.954692556634304) internal successors, (9776), 2472 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:18:45,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 9776 transitions. [2022-01-28 15:18:45,975 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 9776 transitions. Word has length 35 [2022-01-28 15:18:45,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:18:45,975 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 9776 transitions. [2022-01-28 15:18:45,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 20 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 15:18:45,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 9776 transitions. [2022-01-28 15:18:45,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-28 15:18:45,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:18:45,982 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:18:46,008 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 15:18:46,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:18:46,195 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:18:46,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:18:46,196 INFO L85 PathProgramCache]: Analyzing trace with hash 29767999, now seen corresponding path program 9 times [2022-01-28 15:18:46,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:18:46,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240033022] [2022-01-28 15:18:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:18:46,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:18:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:18:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 15:18:46,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:18:46,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240033022] [2022-01-28 15:18:46,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240033022] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:18:46,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189548893] [2022-01-28 15:18:46,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:18:46,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:18:46,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:18:46,242 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 15:18:46,247 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 15:18:46,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:18:46,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:18:46,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:18:46,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:18:46,470 INFO L354 Elim1Store]: treesize reduction 14, result has 63.2 percent of original size [2022-01-28 15:18:46,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 37 [2022-01-28 15:18:46,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-01-28 15:18:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:18:46,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:18:57,142 INFO L354 Elim1Store]: treesize reduction 5, result has 82.8 percent of original size [2022-01-28 15:18:57,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 67 [2022-01-28 15:18:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:18:57,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189548893] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:18:57,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:18:57,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 12] total 26 [2022-01-28 15:18:57,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780323780] [2022-01-28 15:18:57,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:18:57,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:18:57,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:18:57,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:18:57,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=599, Unknown=5, NotChecked=0, Total=702 [2022-01-28 15:18:57,364 INFO L87 Difference]: Start difference. First operand 2473 states and 9776 transitions. Second operand has 27 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 26 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:08,677 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:19:19,006 WARN L227 SmtUtils]: Spent 10.10s on a formula simplification. DAG size of input: 45 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:19:30,172 WARN L227 SmtUtils]: Spent 10.33s on a formula simplification. DAG size of input: 36 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:19:42,455 WARN L227 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:19:50,971 WARN L227 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 46 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:20:05,808 WARN L227 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:20:11,882 WARN L227 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:20:26,042 WARN L227 SmtUtils]: Spent 14.14s on a formula simplification. DAG size of input: 45 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:20:32,143 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:20:39,314 WARN L227 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:20:53,536 WARN L227 SmtUtils]: Spent 14.16s on a formula simplification. DAG size of input: 45 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:20:59,649 WARN L227 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:21:05,743 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:21:13,861 WARN L227 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:21:20,786 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:21:30,949 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:21:39,032 WARN L227 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:21:45,189 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:21:51,316 WARN L227 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:22:14,236 WARN L227 SmtUtils]: Spent 18.16s on a formula simplification. DAG size of input: 40 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:22:20,309 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:22:26,412 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:23:26,967 WARN L227 SmtUtils]: Spent 48.32s on a formula simplification. DAG size of input: 48 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:23:35,963 WARN L227 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:23:44,052 WARN L227 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:23:56,473 WARN L227 SmtUtils]: Spent 12.40s on a formula simplification. DAG size of input: 35 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:24:04,587 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:24:22,794 WARN L227 SmtUtils]: Spent 18.17s on a formula simplification. DAG size of input: 39 DAG size of output: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:24:29,077 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:24:35,158 WARN L227 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:24:55,365 WARN L227 SmtUtils]: Spent 20.18s on a formula simplification. DAG size of input: 40 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:25:14,186 WARN L227 SmtUtils]: Spent 18.70s on a formula simplification. DAG size of input: 45 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:25:37,275 WARN L227 SmtUtils]: Spent 18.15s on a formula simplification. DAG size of input: 36 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:26:59,974 WARN L227 SmtUtils]: Spent 58.40s on a formula simplification. DAG size of input: 49 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:28:36,647 WARN L227 SmtUtils]: Spent 50.37s on a formula simplification. DAG size of input: 50 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:29:07,807 WARN L227 SmtUtils]: Spent 20.23s on a formula simplification. DAG size of input: 44 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:29:15,902 WARN L227 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:29:26,192 WARN L227 SmtUtils]: Spent 10.10s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:30:36,829 WARN L227 SmtUtils]: Spent 1.04m on a formula simplification. DAG size of input: 47 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:31:10,310 WARN L227 SmtUtils]: Spent 18.18s on a formula simplification. DAG size of input: 39 DAG size of output: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:31:26,607 WARN L227 SmtUtils]: Spent 16.23s on a formula simplification. DAG size of input: 43 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:31:44,877 WARN L227 SmtUtils]: Spent 18.19s on a formula simplification. DAG size of input: 44 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:32:55,581 WARN L227 SmtUtils]: Spent 54.40s on a formula simplification. DAG size of input: 48 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:33:07,946 WARN L227 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2022-01-28 15:33:09,736 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 15:33:09,736 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-28 15:33:10,764 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 15:33:10,937 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-01-28 15:33:10,958 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 137 [2022-01-28 15:33:10,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 381 states. [2022-01-28 15:33:10,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 68 SyntacticMatches, 17 SemanticMatches, 395 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 77273 ImplicationChecksByTransitivity, 859.6s TimeCoverageRelationStatistics Valid=17999, Invalid=139136, Unknown=77, NotChecked=0, Total=157212 [2022-01-28 15:33:10,983 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 1826 mSDsluCounter, 2508 mSDsCounter, 0 mSdLazyCounter, 4575 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1826 SdHoareTripleChecker+Valid, 1469 SdHoareTripleChecker+Invalid, 7390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 4575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2400 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:33:10,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1826 Valid, 1469 Invalid, 7390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 4575 Invalid, 0 Unknown, 2400 Unchecked, 2.5s Time] [2022-01-28 15:33:10,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-28 15:33:10,986 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Not enough levels on assertion stack at de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:306) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.pop(UndoableWrapperScript.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.restore(UndoableWrapperScript.java:87) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:241) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:159) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-01-28 15:33:10,988 INFO L158 Benchmark]: Toolchain (without parser) took 878899.74ms. Allocated memory was 186.6MB in the beginning and 367.0MB in the end (delta: 180.4MB). Free memory was 143.9MB in the beginning and 152.4MB in the end (delta: -8.4MB). Peak memory consumption was 173.0MB. Max. memory is 8.0GB. [2022-01-28 15:33:10,988 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 186.6MB. Free memory is still 145.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-28 15:33:10,988 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.95ms. Allocated memory is still 186.6MB. Free memory was 143.8MB in the beginning and 142.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-28 15:33:10,988 INFO L158 Benchmark]: Boogie Preprocessor took 17.51ms. Allocated memory is still 186.6MB. Free memory was 142.3MB in the beginning and 141.3MB in the end (delta: 935.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-28 15:33:10,988 INFO L158 Benchmark]: RCFGBuilder took 226.76ms. Allocated memory is still 186.6MB. Free memory was 141.2MB in the beginning and 131.5MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-28 15:33:10,989 INFO L158 Benchmark]: TraceAbstraction took 878619.77ms. Allocated memory was 186.6MB in the beginning and 367.0MB in the end (delta: 180.4MB). Free memory was 131.0MB in the beginning and 152.4MB in the end (delta: -21.3MB). Peak memory consumption was 160.4MB. Max. memory is 8.0GB. [2022-01-28 15:33:10,990 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13ms. Allocated memory is still 186.6MB. Free memory is still 145.1MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.95ms. Allocated memory is still 186.6MB. Free memory was 143.8MB in the beginning and 142.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.51ms. Allocated memory is still 186.6MB. Free memory was 142.3MB in the beginning and 141.3MB in the end (delta: 935.6kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 226.76ms. Allocated memory is still 186.6MB. Free memory was 141.2MB in the beginning and 131.5MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 878619.77ms. Allocated memory was 186.6MB in the beginning and 367.0MB in the end (delta: 180.4MB). Free memory was 131.0MB in the beginning and 152.4MB in the end (delta: -21.3MB). Peak memory consumption was 160.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Not enough levels on assertion stack de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Not enough levels on assertion stack: de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:306) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown