/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/parallel/bakery-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:28:56,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:28:56,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:28:56,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:28:56,273 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 [2021-08-21 12:28:56,300 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:28:56,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:28:56,301 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:28:56,301 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:28:56,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:28:56,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:28:56,303 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:28:56,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:28:56,304 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:28:56,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:28:56,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:28:56,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:28:56,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:28:56,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:28:56,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:28:56,305 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:28:56,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:28:56,305 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:28:56,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:28:56,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:28:56,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:28:56,306 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:28:56,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:28:56,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:28:56,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:28:56,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:28:56,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:28:56,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:28:56,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:28:56,306 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:28:56,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:28:56,307 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:28:56,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:28:56,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:28:56,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:28:56,562 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:28:56,563 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:28:56,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-4.wvr.bpl [2021-08-21 12:28:56,564 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-4.wvr.bpl' [2021-08-21 12:28:56,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:28:56,595 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:28:56,595 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:28:56,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:28:56,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:28:56,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:28:56" (1/1) ... [2021-08-21 12:28:56,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:28:56" (1/1) ... [2021-08-21 12:28:56,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:28:56,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:28:56,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:28:56,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:28:56,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:28:56" (1/1) ... [2021-08-21 12:28:56,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:28:56" (1/1) ... [2021-08-21 12:28:56,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:28:56" (1/1) ... [2021-08-21 12:28:56,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:28:56" (1/1) ... [2021-08-21 12:28:56,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:28:56" (1/1) ... [2021-08-21 12:28:56,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:28:56" (1/1) ... [2021-08-21 12:28:56,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:28:56" (1/1) ... [2021-08-21 12:28:56,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:28:56,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:28:56,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:28:56,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:28:56,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:28:56" (1/1) ... [2021-08-21 12:28:56,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:28:56,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:56,658 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) [2021-08-21 12:28:56,673 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 [2021-08-21 12:28:56,684 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:28:56,685 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:28:56,685 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:28:56,685 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:28:56,685 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:28:56,685 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:28:56,685 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:28:56,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:28:56,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:28:56,685 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:28:56,685 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:28:56,686 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:28:56,686 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 12:28:56,686 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 12:28:56,686 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 12:28:56,686 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:28:56,860 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:28:56,861 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 12:28:56,862 INFO L202 PluginConnector]: Adding new model bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:28:56 BoogieIcfgContainer [2021-08-21 12:28:56,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:28:56,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:28:56,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:28:56,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:28:56,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:28:56" (1/2) ... [2021-08-21 12:28:56,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@451f6a43 and model type bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:28:56, skipping insertion in model container [2021-08-21 12:28:56,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:28:56" (2/2) ... [2021-08-21 12:28:56,866 INFO L111 eAbstractionObserver]: Analyzing ICFG bakery-4.wvr.bpl [2021-08-21 12:28:56,869 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:28:56,869 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:28:56,869 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:28:56,870 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:28:56,947 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-21 12:28:56,974 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:28:56,980 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, mConcurrency=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 [2021-08-21 12:28:56,980 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-21 12:28:56,989 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 94 places, 81 transitions, 194 flow [2021-08-21 12:28:59,513 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 93964 states, 93963 states have (on average 3.7646626863765524) internal successors, (353739), 93963 states have internal predecessors, (353739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:59,696 INFO L276 IsEmpty]: Start isEmpty. Operand has 93964 states, 93963 states have (on average 3.7646626863765524) internal successors, (353739), 93963 states have internal predecessors, (353739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:00,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:29:00,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:00,634 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:00,635 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:29:00,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:00,643 INFO L82 PathProgramCache]: Analyzing trace with hash 2011485542, now seen corresponding path program 1 times [2021-08-21 12:29:00,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:00,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785893424] [2021-08-21 12:29:00,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:00,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:00,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:00,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785893424] [2021-08-21 12:29:00,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785893424] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:29:00,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:29:00,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:29:00,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143769460] [2021-08-21 12:29:00,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:29:00,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:00,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:29:00,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:29:00,987 INFO L87 Difference]: Start difference. First operand has 93964 states, 93963 states have (on average 3.7646626863765524) internal successors, (353739), 93963 states have internal predecessors, (353739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:02,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:02,082 INFO L93 Difference]: Finished difference Result 93964 states and 349229 transitions. [2021-08-21 12:29:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:29:02,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:29:02,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:02,710 INFO L225 Difference]: With dead ends: 93964 [2021-08-21 12:29:02,710 INFO L226 Difference]: Without dead ends: 93964 [2021-08-21 12:29:02,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:29:02,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93964 states. [2021-08-21 12:29:05,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93964 to 93964. [2021-08-21 12:29:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93964 states, 93963 states have (on average 3.7166650702936264) internal successors, (349229), 93963 states have internal predecessors, (349229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93964 states to 93964 states and 349229 transitions. [2021-08-21 12:29:06,320 INFO L78 Accepts]: Start accepts. Automaton has 93964 states and 349229 transitions. Word has length 75 [2021-08-21 12:29:06,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:06,321 INFO L470 AbstractCegarLoop]: Abstraction has 93964 states and 349229 transitions. [2021-08-21 12:29:06,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:06,321 INFO L276 IsEmpty]: Start isEmpty. Operand 93964 states and 349229 transitions. [2021-08-21 12:29:06,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:29:06,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:06,853 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:06,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:29:06,854 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:29:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:06,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1256120134, now seen corresponding path program 2 times [2021-08-21 12:29:06,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:06,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559339441] [2021-08-21 12:29:06,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:06,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:06,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:06,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559339441] [2021-08-21 12:29:06,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559339441] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:29:06,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:29:06,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:29:06,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944003549] [2021-08-21 12:29:06,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:29:06,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:06,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:29:06,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:29:06,903 INFO L87 Difference]: Start difference. First operand 93964 states and 349229 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:07,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:07,618 INFO L93 Difference]: Finished difference Result 93964 states and 344549 transitions. [2021-08-21 12:29:07,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:29:07,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:29:07,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:08,249 INFO L225 Difference]: With dead ends: 93964 [2021-08-21 12:29:08,249 INFO L226 Difference]: Without dead ends: 93964 [2021-08-21 12:29:08,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:29:08,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93964 states. [2021-08-21 12:29:10,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93964 to 93964. [2021-08-21 12:29:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93964 states, 93963 states have (on average 3.666858231431521) internal successors, (344549), 93963 states have internal predecessors, (344549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93964 states to 93964 states and 344549 transitions. [2021-08-21 12:29:11,268 INFO L78 Accepts]: Start accepts. Automaton has 93964 states and 344549 transitions. Word has length 75 [2021-08-21 12:29:11,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:11,269 INFO L470 AbstractCegarLoop]: Abstraction has 93964 states and 344549 transitions. [2021-08-21 12:29:11,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:11,269 INFO L276 IsEmpty]: Start isEmpty. Operand 93964 states and 344549 transitions. [2021-08-21 12:29:11,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:29:11,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:11,476 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:11,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:29:11,477 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:29:11,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:11,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1955601766, now seen corresponding path program 3 times [2021-08-21 12:29:11,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:11,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827454369] [2021-08-21 12:29:11,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:11,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:11,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:11,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827454369] [2021-08-21 12:29:11,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827454369] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:29:11,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:29:11,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-21 12:29:11,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036598948] [2021-08-21 12:29:11,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:29:11,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:11,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:29:11,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:29:11,790 INFO L87 Difference]: Start difference. First operand 93964 states and 344549 transitions. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:15,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:15,611 INFO L93 Difference]: Finished difference Result 328634 states and 1223314 transitions. [2021-08-21 12:29:15,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:29:15,612 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:29:15,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:17,903 INFO L225 Difference]: With dead ends: 328634 [2021-08-21 12:29:17,908 INFO L226 Difference]: Without dead ends: 328634 [2021-08-21 12:29:17,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:29:18,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328634 states. [2021-08-21 12:29:24,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328634 to 117603. [2021-08-21 12:29:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117603 states, 117602 states have (on average 3.6610856958214995) internal successors, (430551), 117602 states have internal predecessors, (430551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117603 states to 117603 states and 430551 transitions. [2021-08-21 12:29:25,391 INFO L78 Accepts]: Start accepts. Automaton has 117603 states and 430551 transitions. Word has length 75 [2021-08-21 12:29:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:25,391 INFO L470 AbstractCegarLoop]: Abstraction has 117603 states and 430551 transitions. [2021-08-21 12:29:25,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 117603 states and 430551 transitions. [2021-08-21 12:29:25,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:29:25,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:25,710 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:25,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:29:25,710 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:29:25,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:25,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1001642634, now seen corresponding path program 4 times [2021-08-21 12:29:25,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:25,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763029133] [2021-08-21 12:29:25,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:25,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:25,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:25,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763029133] [2021-08-21 12:29:25,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763029133] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:29:25,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:29:25,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-21 12:29:25,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350909996] [2021-08-21 12:29:25,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:29:25,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:25,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:29:25,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:29:25,857 INFO L87 Difference]: Start difference. First operand 117603 states and 430551 transitions. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:29,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:29,029 INFO L93 Difference]: Finished difference Result 283513 states and 1047164 transitions. [2021-08-21 12:29:29,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:29:29,030 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:29:29,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:30,723 INFO L225 Difference]: With dead ends: 283513 [2021-08-21 12:29:30,723 INFO L226 Difference]: Without dead ends: 283513 [2021-08-21 12:29:30,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:29:31,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283513 states. [2021-08-21 12:29:36,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283513 to 143331. [2021-08-21 12:29:36,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143331 states, 143330 states have (on average 3.661201423288914) internal successors, (524760), 143330 states have internal predecessors, (524760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143331 states to 143331 states and 524760 transitions. [2021-08-21 12:29:37,817 INFO L78 Accepts]: Start accepts. Automaton has 143331 states and 524760 transitions. Word has length 75 [2021-08-21 12:29:37,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:37,817 INFO L470 AbstractCegarLoop]: Abstraction has 143331 states and 524760 transitions. [2021-08-21 12:29:37,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:37,817 INFO L276 IsEmpty]: Start isEmpty. Operand 143331 states and 524760 transitions. [2021-08-21 12:29:38,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:29:38,548 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:38,548 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:38,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 12:29:38,548 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:29:38,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:38,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1841467118, now seen corresponding path program 5 times [2021-08-21 12:29:38,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:38,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595145569] [2021-08-21 12:29:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:38,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:38,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:38,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595145569] [2021-08-21 12:29:38,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595145569] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:29:38,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:29:38,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-21 12:29:38,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943529028] [2021-08-21 12:29:38,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:29:38,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:38,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:29:38,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:29:38,673 INFO L87 Difference]: Start difference. First operand 143331 states and 524760 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:40,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:40,342 INFO L93 Difference]: Finished difference Result 178770 states and 642652 transitions. [2021-08-21 12:29:40,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:29:40,342 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:29:40,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:41,794 INFO L225 Difference]: With dead ends: 178770 [2021-08-21 12:29:41,794 INFO L226 Difference]: Without dead ends: 177087 [2021-08-21 12:29:41,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:29:42,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177087 states. [2021-08-21 12:29:46,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177087 to 146828. [2021-08-21 12:29:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146828 states, 146827 states have (on average 3.6530883284409543) internal successors, (536372), 146827 states have internal predecessors, (536372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:47,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146828 states to 146828 states and 536372 transitions. [2021-08-21 12:29:47,397 INFO L78 Accepts]: Start accepts. Automaton has 146828 states and 536372 transitions. Word has length 75 [2021-08-21 12:29:47,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:47,397 INFO L470 AbstractCegarLoop]: Abstraction has 146828 states and 536372 transitions. [2021-08-21 12:29:47,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:47,398 INFO L276 IsEmpty]: Start isEmpty. Operand 146828 states and 536372 transitions. [2021-08-21 12:29:48,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:29:48,089 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:48,090 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:48,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 12:29:48,090 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:29:48,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:48,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1394231822, now seen corresponding path program 6 times [2021-08-21 12:29:48,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:48,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558660888] [2021-08-21 12:29:48,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:48,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:48,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:48,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558660888] [2021-08-21 12:29:48,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558660888] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:29:48,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:29:48,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-21 12:29:48,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283099132] [2021-08-21 12:29:48,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:29:48,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:48,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:29:48,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:29:48,386 INFO L87 Difference]: Start difference. First operand 146828 states and 536372 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:50,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:50,836 INFO L93 Difference]: Finished difference Result 235759 states and 865359 transitions. [2021-08-21 12:29:50,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:29:50,837 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:29:50,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:52,286 INFO L225 Difference]: With dead ends: 235759 [2021-08-21 12:29:52,286 INFO L226 Difference]: Without dead ends: 234053 [2021-08-21 12:29:52,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:29:52,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234053 states. [2021-08-21 12:29:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234053 to 168819. [2021-08-21 12:29:57,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168819 states, 168818 states have (on average 3.665936096861709) internal successors, (618876), 168818 states have internal predecessors, (618876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168819 states to 168819 states and 618876 transitions. [2021-08-21 12:29:58,880 INFO L78 Accepts]: Start accepts. Automaton has 168819 states and 618876 transitions. Word has length 75 [2021-08-21 12:29:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:58,880 INFO L470 AbstractCegarLoop]: Abstraction has 168819 states and 618876 transitions. [2021-08-21 12:29:58,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 168819 states and 618876 transitions. [2021-08-21 12:29:59,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:29:59,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:59,647 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:59,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 12:29:59,647 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:29:59,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:59,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2000258066, now seen corresponding path program 7 times [2021-08-21 12:29:59,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:59,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730022141] [2021-08-21 12:29:59,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:59,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:59,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:59,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730022141] [2021-08-21 12:29:59,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730022141] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:29:59,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:29:59,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:29:59,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705186115] [2021-08-21 12:29:59,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:29:59,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:59,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:29:59,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:29:59,776 INFO L87 Difference]: Start difference. First operand 168819 states and 618876 transitions. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:07,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:07,708 INFO L93 Difference]: Finished difference Result 658434 states and 2435908 transitions. [2021-08-21 12:30:07,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:30:07,708 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:30:07,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:12,434 INFO L225 Difference]: With dead ends: 658434 [2021-08-21 12:30:12,434 INFO L226 Difference]: Without dead ends: 657478 [2021-08-21 12:30:12,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:30:13,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657478 states. [2021-08-21 12:30:25,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657478 to 168859. [2021-08-21 12:30:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168859 states, 168858 states have (on average 3.6660685309550036) internal successors, (619045), 168858 states have internal predecessors, (619045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168859 states to 168859 states and 619045 transitions. [2021-08-21 12:30:26,294 INFO L78 Accepts]: Start accepts. Automaton has 168859 states and 619045 transitions. Word has length 75 [2021-08-21 12:30:26,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:26,294 INFO L470 AbstractCegarLoop]: Abstraction has 168859 states and 619045 transitions. [2021-08-21 12:30:26,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 168859 states and 619045 transitions. [2021-08-21 12:30:27,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:30:27,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:27,090 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:27,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 12:30:27,091 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:30:27,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:27,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1088824782, now seen corresponding path program 8 times [2021-08-21 12:30:27,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:27,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16470747] [2021-08-21 12:30:27,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:27,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:27,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:27,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16470747] [2021-08-21 12:30:27,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16470747] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:30:27,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:30:27,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-21 12:30:27,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393522617] [2021-08-21 12:30:27,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:30:27,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:27,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:30:27,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:30:27,315 INFO L87 Difference]: Start difference. First operand 168859 states and 619045 transitions. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:31,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:31,490 INFO L93 Difference]: Finished difference Result 381920 states and 1415506 transitions. [2021-08-21 12:30:31,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:30:31,490 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:30:31,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:35,387 INFO L225 Difference]: With dead ends: 381920 [2021-08-21 12:30:35,387 INFO L226 Difference]: Without dead ends: 381654 [2021-08-21 12:30:35,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 363.8ms TimeCoverageRelationStatistics Valid=124, Invalid=218, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:30:36,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381654 states. [2021-08-21 12:30:42,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381654 to 150822. [2021-08-21 12:30:43,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150822 states, 150821 states have (on average 3.6564868287572687) internal successors, (551475), 150821 states have internal predecessors, (551475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150822 states to 150822 states and 551475 transitions. [2021-08-21 12:30:44,005 INFO L78 Accepts]: Start accepts. Automaton has 150822 states and 551475 transitions. Word has length 75 [2021-08-21 12:30:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:44,005 INFO L470 AbstractCegarLoop]: Abstraction has 150822 states and 551475 transitions. [2021-08-21 12:30:44,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand 150822 states and 551475 transitions. [2021-08-21 12:30:44,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:30:44,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:44,699 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:44,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 12:30:44,699 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:30:44,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:44,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1989302190, now seen corresponding path program 9 times [2021-08-21 12:30:44,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:44,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499809736] [2021-08-21 12:30:44,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:44,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:44,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:44,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499809736] [2021-08-21 12:30:44,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499809736] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:30:44,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:30:44,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-21 12:30:44,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772432176] [2021-08-21 12:30:44,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:30:44,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:44,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:30:44,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:30:44,809 INFO L87 Difference]: Start difference. First operand 150822 states and 551475 transitions. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:49,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:49,188 INFO L93 Difference]: Finished difference Result 458777 states and 1698770 transitions. [2021-08-21 12:30:49,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:30:49,189 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:30:49,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:51,829 INFO L225 Difference]: With dead ends: 458777 [2021-08-21 12:30:51,830 INFO L226 Difference]: Without dead ends: 458777 [2021-08-21 12:30:51,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:30:53,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458777 states. [2021-08-21 12:31:03,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458777 to 177226. [2021-08-21 12:31:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177226 states, 177225 states have (on average 3.6655438002539147) internal successors, (649626), 177225 states have internal predecessors, (649626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:04,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177226 states to 177226 states and 649626 transitions. [2021-08-21 12:31:04,409 INFO L78 Accepts]: Start accepts. Automaton has 177226 states and 649626 transitions. Word has length 75 [2021-08-21 12:31:04,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:04,409 INFO L470 AbstractCegarLoop]: Abstraction has 177226 states and 649626 transitions. [2021-08-21 12:31:04,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:04,410 INFO L276 IsEmpty]: Start isEmpty. Operand 177226 states and 649626 transitions. [2021-08-21 12:31:05,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:31:05,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:05,211 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:05,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 12:31:05,211 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:31:05,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:05,212 INFO L82 PathProgramCache]: Analyzing trace with hash -2111315214, now seen corresponding path program 10 times [2021-08-21 12:31:05,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:05,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782085279] [2021-08-21 12:31:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:05,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:05,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:05,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782085279] [2021-08-21 12:31:05,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782085279] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:31:05,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:31:05,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-21 12:31:05,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716963999] [2021-08-21 12:31:05,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:31:05,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:05,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:31:05,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:31:05,334 INFO L87 Difference]: Start difference. First operand 177226 states and 649626 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:07,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:07,262 INFO L93 Difference]: Finished difference Result 212886 states and 768496 transitions. [2021-08-21 12:31:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:31:07,263 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:31:07,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:08,501 INFO L225 Difference]: With dead ends: 212886 [2021-08-21 12:31:08,501 INFO L226 Difference]: Without dead ends: 210707 [2021-08-21 12:31:08,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:31:08,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210707 states. [2021-08-21 12:31:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210707 to 176227. [2021-08-21 12:31:13,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176227 states, 176226 states have (on average 3.664113127461328) internal successors, (645712), 176226 states have internal predecessors, (645712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176227 states to 176227 states and 645712 transitions. [2021-08-21 12:31:15,221 INFO L78 Accepts]: Start accepts. Automaton has 176227 states and 645712 transitions. Word has length 75 [2021-08-21 12:31:15,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:15,221 INFO L470 AbstractCegarLoop]: Abstraction has 176227 states and 645712 transitions. [2021-08-21 12:31:15,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:15,222 INFO L276 IsEmpty]: Start isEmpty. Operand 176227 states and 645712 transitions. [2021-08-21 12:31:16,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:31:16,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:16,075 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:16,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-21 12:31:16,076 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:31:16,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:16,076 INFO L82 PathProgramCache]: Analyzing trace with hash 148994446, now seen corresponding path program 11 times [2021-08-21 12:31:16,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:16,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100451858] [2021-08-21 12:31:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:16,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:16,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:16,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100451858] [2021-08-21 12:31:16,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100451858] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:31:16,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:31:16,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-21 12:31:16,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292338947] [2021-08-21 12:31:16,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:31:16,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:16,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:31:16,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:31:16,312 INFO L87 Difference]: Start difference. First operand 176227 states and 645712 transitions. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:20,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:20,758 INFO L93 Difference]: Finished difference Result 351847 states and 1271416 transitions. [2021-08-21 12:31:20,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:31:20,759 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:31:20,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:23,209 INFO L225 Difference]: With dead ends: 351847 [2021-08-21 12:31:23,210 INFO L226 Difference]: Without dead ends: 351150 [2021-08-21 12:31:23,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:31:24,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351150 states. [2021-08-21 12:31:31,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351150 to 200392. [2021-08-21 12:31:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200392 states, 200391 states have (on average 3.6610077298880688) internal successors, (733633), 200391 states have internal predecessors, (733633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:33,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200392 states to 200392 states and 733633 transitions. [2021-08-21 12:31:33,505 INFO L78 Accepts]: Start accepts. Automaton has 200392 states and 733633 transitions. Word has length 75 [2021-08-21 12:31:33,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:33,505 INFO L470 AbstractCegarLoop]: Abstraction has 200392 states and 733633 transitions. [2021-08-21 12:31:33,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:33,505 INFO L276 IsEmpty]: Start isEmpty. Operand 200392 states and 733633 transitions. [2021-08-21 12:31:34,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:31:34,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:34,442 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:34,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-21 12:31:34,442 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:31:34,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:34,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1934888770, now seen corresponding path program 12 times [2021-08-21 12:31:34,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:34,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829077266] [2021-08-21 12:31:34,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:34,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:34,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:34,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829077266] [2021-08-21 12:31:34,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829077266] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:31:34,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:31:34,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-21 12:31:34,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258284043] [2021-08-21 12:31:34,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:31:34,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:34,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:31:34,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:31:34,772 INFO L87 Difference]: Start difference. First operand 200392 states and 733633 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:37,780 INFO L93 Difference]: Finished difference Result 249805 states and 913024 transitions. [2021-08-21 12:31:37,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:31:37,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:31:37,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:39,921 INFO L225 Difference]: With dead ends: 249805 [2021-08-21 12:31:39,921 INFO L226 Difference]: Without dead ends: 248918 [2021-08-21 12:31:39,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 442.1ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:31:40,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248918 states. [2021-08-21 12:31:47,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248918 to 207905. [2021-08-21 12:31:47,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207905 states, 207904 states have (on average 3.6588617823610896) internal successors, (760692), 207904 states have internal predecessors, (760692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:49,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207905 states to 207905 states and 760692 transitions. [2021-08-21 12:31:49,252 INFO L78 Accepts]: Start accepts. Automaton has 207905 states and 760692 transitions. Word has length 75 [2021-08-21 12:31:49,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:49,252 INFO L470 AbstractCegarLoop]: Abstraction has 207905 states and 760692 transitions. [2021-08-21 12:31:49,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:49,252 INFO L276 IsEmpty]: Start isEmpty. Operand 207905 states and 760692 transitions. [2021-08-21 12:31:50,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:31:50,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:50,498 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:50,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-21 12:31:50,498 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:31:50,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:50,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1303102432, now seen corresponding path program 13 times [2021-08-21 12:31:50,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:50,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878196928] [2021-08-21 12:31:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:50,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:50,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:50,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878196928] [2021-08-21 12:31:50,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878196928] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:31:50,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:31:50,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-21 12:31:50,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640304410] [2021-08-21 12:31:50,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:31:50,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:50,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:31:50,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:31:50,819 INFO L87 Difference]: Start difference. First operand 207905 states and 760692 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:53,911 INFO L93 Difference]: Finished difference Result 269774 states and 985988 transitions. [2021-08-21 12:31:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:31:53,911 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:31:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:55,446 INFO L225 Difference]: With dead ends: 269774 [2021-08-21 12:31:55,446 INFO L226 Difference]: Without dead ends: 268862 [2021-08-21 12:31:55,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 196.4ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:31:56,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268862 states. [2021-08-21 12:32:02,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268862 to 208077. [2021-08-21 12:32:02,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208077 states, 208076 states have (on average 3.6588217766585287) internal successors, (761313), 208076 states have internal predecessors, (761313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208077 states to 208077 states and 761313 transitions. [2021-08-21 12:32:04,622 INFO L78 Accepts]: Start accepts. Automaton has 208077 states and 761313 transitions. Word has length 75 [2021-08-21 12:32:04,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:04,622 INFO L470 AbstractCegarLoop]: Abstraction has 208077 states and 761313 transitions. [2021-08-21 12:32:04,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 208077 states and 761313 transitions. [2021-08-21 12:32:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:32:05,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:05,971 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:05,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-21 12:32:05,971 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:32:05,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:05,971 INFO L82 PathProgramCache]: Analyzing trace with hash -977731590, now seen corresponding path program 14 times [2021-08-21 12:32:05,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:05,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849720918] [2021-08-21 12:32:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:05,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:06,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:06,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849720918] [2021-08-21 12:32:06,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849720918] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:32:06,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:32:06,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-21 12:32:06,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392480441] [2021-08-21 12:32:06,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:32:06,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:06,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:32:06,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:32:06,420 INFO L87 Difference]: Start difference. First operand 208077 states and 761313 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:10,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:10,605 INFO L93 Difference]: Finished difference Result 257177 states and 938269 transitions. [2021-08-21 12:32:10,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:32:10,606 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:32:10,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:12,149 INFO L225 Difference]: With dead ends: 257177 [2021-08-21 12:32:12,149 INFO L226 Difference]: Without dead ends: 255557 [2021-08-21 12:32:12,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 821.5ms TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:32:12,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255557 states. [2021-08-21 12:32:19,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255557 to 233662. [2021-08-21 12:32:19,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233662 states, 233661 states have (on average 3.65157214939592) internal successors, (853230), 233661 states have internal predecessors, (853230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233662 states to 233662 states and 853230 transitions. [2021-08-21 12:32:21,753 INFO L78 Accepts]: Start accepts. Automaton has 233662 states and 853230 transitions. Word has length 75 [2021-08-21 12:32:21,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:21,753 INFO L470 AbstractCegarLoop]: Abstraction has 233662 states and 853230 transitions. [2021-08-21 12:32:21,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:21,753 INFO L276 IsEmpty]: Start isEmpty. Operand 233662 states and 853230 transitions. [2021-08-21 12:32:22,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:32:22,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:22,724 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:22,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-21 12:32:22,724 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:32:22,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:22,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1412964060, now seen corresponding path program 15 times [2021-08-21 12:32:22,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:22,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059741078] [2021-08-21 12:32:22,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:22,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:23,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:23,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059741078] [2021-08-21 12:32:23,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059741078] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:32:23,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:32:23,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-21 12:32:23,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485803601] [2021-08-21 12:32:23,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:32:23,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:23,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:32:23,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:32:23,469 INFO L87 Difference]: Start difference. First operand 233662 states and 853230 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:25,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:25,924 INFO L93 Difference]: Finished difference Result 236732 states and 863343 transitions. [2021-08-21 12:32:25,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:32:25,924 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:32:25,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:27,344 INFO L225 Difference]: With dead ends: 236732 [2021-08-21 12:32:27,345 INFO L226 Difference]: Without dead ends: 234689 [2021-08-21 12:32:27,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 670.6ms TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:32:28,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234689 states. [2021-08-21 12:32:33,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234689 to 234482. [2021-08-21 12:32:34,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234482 states, 234481 states have (on average 3.6501678174351015) internal successors, (855895), 234481 states have internal predecessors, (855895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:36,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234482 states to 234482 states and 855895 transitions. [2021-08-21 12:32:36,588 INFO L78 Accepts]: Start accepts. Automaton has 234482 states and 855895 transitions. Word has length 75 [2021-08-21 12:32:36,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:36,588 INFO L470 AbstractCegarLoop]: Abstraction has 234482 states and 855895 transitions. [2021-08-21 12:32:36,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:36,588 INFO L276 IsEmpty]: Start isEmpty. Operand 234482 states and 855895 transitions. [2021-08-21 12:32:37,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:32:37,889 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:37,889 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:37,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-21 12:32:37,890 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:32:37,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:37,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2110821628, now seen corresponding path program 16 times [2021-08-21 12:32:37,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:37,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845839536] [2021-08-21 12:32:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:37,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:38,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:38,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845839536] [2021-08-21 12:32:38,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845839536] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:32:38,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:32:38,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-21 12:32:38,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196402995] [2021-08-21 12:32:38,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:32:38,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:38,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:32:38,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:32:38,579 INFO L87 Difference]: Start difference. First operand 234482 states and 855895 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:41,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:41,603 INFO L93 Difference]: Finished difference Result 236842 states and 863596 transitions. [2021-08-21 12:32:41,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:32:41,604 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:32:41,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:42,970 INFO L225 Difference]: With dead ends: 236842 [2021-08-21 12:32:42,971 INFO L226 Difference]: Without dead ends: 235366 [2021-08-21 12:32:42,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 599.9ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:32:43,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235366 states. [2021-08-21 12:32:49,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235366 to 234527. [2021-08-21 12:32:50,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234527 states, 234526 states have (on average 3.6502008306115314) internal successors, (856067), 234526 states have internal predecessors, (856067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234527 states to 234527 states and 856067 transitions. [2021-08-21 12:32:52,581 INFO L78 Accepts]: Start accepts. Automaton has 234527 states and 856067 transitions. Word has length 75 [2021-08-21 12:32:52,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:52,581 INFO L470 AbstractCegarLoop]: Abstraction has 234527 states and 856067 transitions. [2021-08-21 12:32:52,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:52,581 INFO L276 IsEmpty]: Start isEmpty. Operand 234527 states and 856067 transitions. [2021-08-21 12:32:53,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:32:53,357 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:53,357 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:53,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-21 12:32:53,357 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:32:53,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:53,358 INFO L82 PathProgramCache]: Analyzing trace with hash -221361626, now seen corresponding path program 17 times [2021-08-21 12:32:53,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:53,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031922841] [2021-08-21 12:32:53,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:53,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:53,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:53,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031922841] [2021-08-21 12:32:53,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031922841] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:32:53,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:32:53,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-21 12:32:53,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239196308] [2021-08-21 12:32:53,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:32:53,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:53,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:32:53,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:32:53,914 INFO L87 Difference]: Start difference. First operand 234527 states and 856067 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:56,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:56,534 INFO L93 Difference]: Finished difference Result 237872 states and 867062 transitions. [2021-08-21 12:32:56,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:32:56,534 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:32:56,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:57,570 INFO L225 Difference]: With dead ends: 237872 [2021-08-21 12:32:57,570 INFO L226 Difference]: Without dead ends: 235496 [2021-08-21 12:32:57,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 674.2ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:32:58,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235496 states. [2021-08-21 12:33:04,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235496 to 233483. [2021-08-21 12:33:05,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233483 states, 233482 states have (on average 3.6516647964297033) internal successors, (852598), 233482 states have internal predecessors, (852598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:07,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233483 states to 233483 states and 852598 transitions. [2021-08-21 12:33:07,619 INFO L78 Accepts]: Start accepts. Automaton has 233483 states and 852598 transitions. Word has length 75 [2021-08-21 12:33:07,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:07,619 INFO L470 AbstractCegarLoop]: Abstraction has 233483 states and 852598 transitions. [2021-08-21 12:33:07,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:07,619 INFO L276 IsEmpty]: Start isEmpty. Operand 233483 states and 852598 transitions. [2021-08-21 12:33:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:33:08,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:08,573 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:08,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-21 12:33:08,573 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:33:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:08,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1853259638, now seen corresponding path program 18 times [2021-08-21 12:33:08,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:08,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122296405] [2021-08-21 12:33:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:08,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:08,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:08,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122296405] [2021-08-21 12:33:08,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122296405] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:33:08,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:33:08,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-21 12:33:08,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336389932] [2021-08-21 12:33:08,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:33:08,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:08,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:33:08,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:33:08,752 INFO L87 Difference]: Start difference. First operand 233483 states and 852598 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:12,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:12,514 INFO L93 Difference]: Finished difference Result 325920 states and 1177171 transitions. [2021-08-21 12:33:12,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:33:12,514 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:33:12,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:14,321 INFO L225 Difference]: With dead ends: 325920 [2021-08-21 12:33:14,321 INFO L226 Difference]: Without dead ends: 325920 [2021-08-21 12:33:14,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:33:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325920 states. [2021-08-21 12:33:24,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325920 to 271508. [2021-08-21 12:33:24,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271508 states, 271507 states have (on average 3.635195409326463) internal successors, (986981), 271507 states have internal predecessors, (986981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:26,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271508 states to 271508 states and 986981 transitions. [2021-08-21 12:33:26,643 INFO L78 Accepts]: Start accepts. Automaton has 271508 states and 986981 transitions. Word has length 75 [2021-08-21 12:33:26,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:26,644 INFO L470 AbstractCegarLoop]: Abstraction has 271508 states and 986981 transitions. [2021-08-21 12:33:26,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:26,644 INFO L276 IsEmpty]: Start isEmpty. Operand 271508 states and 986981 transitions. [2021-08-21 12:33:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:33:27,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:27,707 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:27,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-21 12:33:27,707 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:33:27,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:27,708 INFO L82 PathProgramCache]: Analyzing trace with hash 460542448, now seen corresponding path program 19 times [2021-08-21 12:33:27,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:27,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798963547] [2021-08-21 12:33:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:27,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:27,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:27,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798963547] [2021-08-21 12:33:27,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798963547] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:33:27,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:33:27,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-21 12:33:27,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460553859] [2021-08-21 12:33:27,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:33:27,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:27,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:33:27,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:33:27,797 INFO L87 Difference]: Start difference. First operand 271508 states and 986981 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:31,307 INFO L93 Difference]: Finished difference Result 325111 states and 1166736 transitions. [2021-08-21 12:33:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:33:31,308 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:33:31,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:34,393 INFO L225 Difference]: With dead ends: 325111 [2021-08-21 12:33:34,393 INFO L226 Difference]: Without dead ends: 321578 [2021-08-21 12:33:34,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:33:35,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321578 states. [2021-08-21 12:33:42,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321578 to 275720. [2021-08-21 12:33:42,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275720 states, 275719 states have (on average 3.6290462391057563) internal successors, (1000597), 275719 states have internal predecessors, (1000597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:44,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275720 states to 275720 states and 1000597 transitions. [2021-08-21 12:33:44,885 INFO L78 Accepts]: Start accepts. Automaton has 275720 states and 1000597 transitions. Word has length 75 [2021-08-21 12:33:44,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:44,885 INFO L470 AbstractCegarLoop]: Abstraction has 275720 states and 1000597 transitions. [2021-08-21 12:33:44,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:44,885 INFO L276 IsEmpty]: Start isEmpty. Operand 275720 states and 1000597 transitions. [2021-08-21 12:33:46,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:33:46,073 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:46,073 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:46,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-21 12:33:46,073 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:33:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:46,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1225187670, now seen corresponding path program 20 times [2021-08-21 12:33:46,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:46,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089509188] [2021-08-21 12:33:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:46,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:46,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:46,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089509188] [2021-08-21 12:33:46,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089509188] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:33:46,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:33:46,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-21 12:33:46,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322245266] [2021-08-21 12:33:46,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:33:46,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:46,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:33:46,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:33:46,254 INFO L87 Difference]: Start difference. First operand 275720 states and 1000597 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:53,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:53,006 INFO L93 Difference]: Finished difference Result 543933 states and 1966079 transitions. [2021-08-21 12:33:53,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:33:53,006 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:33:53,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:56,187 INFO L225 Difference]: With dead ends: 543933 [2021-08-21 12:33:56,187 INFO L226 Difference]: Without dead ends: 532769 [2021-08-21 12:33:56,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:33:57,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532769 states. [2021-08-21 12:34:08,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532769 to 284915. [2021-08-21 12:34:09,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284915 states, 284914 states have (on average 3.6231985792203965) internal successors, (1032300), 284914 states have internal predecessors, (1032300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284915 states to 284915 states and 1032300 transitions. [2021-08-21 12:34:11,359 INFO L78 Accepts]: Start accepts. Automaton has 284915 states and 1032300 transitions. Word has length 75 [2021-08-21 12:34:11,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:11,360 INFO L470 AbstractCegarLoop]: Abstraction has 284915 states and 1032300 transitions. [2021-08-21 12:34:11,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:11,360 INFO L276 IsEmpty]: Start isEmpty. Operand 284915 states and 1032300 transitions. [2021-08-21 12:34:13,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:34:13,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:13,056 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:13,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-21 12:34:13,057 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:34:13,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:13,057 INFO L82 PathProgramCache]: Analyzing trace with hash -729849784, now seen corresponding path program 21 times [2021-08-21 12:34:13,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:13,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351599200] [2021-08-21 12:34:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:13,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:13,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:13,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351599200] [2021-08-21 12:34:13,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351599200] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:34:13,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:34:13,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-21 12:34:13,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563096542] [2021-08-21 12:34:13,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:34:13,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:13,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:34:13,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:34:13,873 INFO L87 Difference]: Start difference. First operand 284915 states and 1032300 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:17,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:17,690 INFO L93 Difference]: Finished difference Result 311324 states and 1117424 transitions. [2021-08-21 12:34:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:34:17,690 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:34:17,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:19,760 INFO L225 Difference]: With dead ends: 311324 [2021-08-21 12:34:19,781 INFO L226 Difference]: Without dead ends: 309904 [2021-08-21 12:34:19,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 541.1ms TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:34:20,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309904 states. [2021-08-21 12:34:27,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309904 to 285999. [2021-08-21 12:34:27,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285999 states, 285998 states have (on average 3.621493856600396) internal successors, (1035740), 285998 states have internal predecessors, (1035740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:30,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285999 states to 285999 states and 1035740 transitions. [2021-08-21 12:34:30,054 INFO L78 Accepts]: Start accepts. Automaton has 285999 states and 1035740 transitions. Word has length 75 [2021-08-21 12:34:30,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:30,054 INFO L470 AbstractCegarLoop]: Abstraction has 285999 states and 1035740 transitions. [2021-08-21 12:34:30,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:30,054 INFO L276 IsEmpty]: Start isEmpty. Operand 285999 states and 1035740 transitions. [2021-08-21 12:34:31,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:34:31,772 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:31,772 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:31,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-21 12:34:31,772 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:34:31,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:31,773 INFO L82 PathProgramCache]: Analyzing trace with hash -101777816, now seen corresponding path program 22 times [2021-08-21 12:34:31,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:31,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502722091] [2021-08-21 12:34:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:31,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:32,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:32,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502722091] [2021-08-21 12:34:32,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502722091] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:34:32,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:34:32,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-21 12:34:32,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996405378] [2021-08-21 12:34:32,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:34:32,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:32,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:34:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:34:32,568 INFO L87 Difference]: Start difference. First operand 285999 states and 1035740 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:36,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:36,480 INFO L93 Difference]: Finished difference Result 311073 states and 1115936 transitions. [2021-08-21 12:34:36,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:34:36,774 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:34:36,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:38,585 INFO L225 Difference]: With dead ends: 311073 [2021-08-21 12:34:38,585 INFO L226 Difference]: Without dead ends: 309095 [2021-08-21 12:34:38,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 919.8ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:34:39,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309095 states. [2021-08-21 12:34:46,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309095 to 285889. [2021-08-21 12:34:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285889 states, 285888 states have (on average 3.6207325945824937) internal successors, (1035124), 285888 states have internal predecessors, (1035124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285889 states to 285889 states and 1035124 transitions. [2021-08-21 12:34:48,751 INFO L78 Accepts]: Start accepts. Automaton has 285889 states and 1035124 transitions. Word has length 75 [2021-08-21 12:34:48,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:48,751 INFO L470 AbstractCegarLoop]: Abstraction has 285889 states and 1035124 transitions. [2021-08-21 12:34:48,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:48,751 INFO L276 IsEmpty]: Start isEmpty. Operand 285889 states and 1035124 transitions. [2021-08-21 12:34:50,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:34:50,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:50,469 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:50,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-21 12:34:50,469 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:34:50,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:50,470 INFO L82 PathProgramCache]: Analyzing trace with hash 906616776, now seen corresponding path program 23 times [2021-08-21 12:34:50,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:50,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423191738] [2021-08-21 12:34:50,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:50,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:51,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:51,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423191738] [2021-08-21 12:34:51,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423191738] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:34:51,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:34:51,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-21 12:34:51,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30487795] [2021-08-21 12:34:51,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:34:51,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:51,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:34:51,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:34:51,119 INFO L87 Difference]: Start difference. First operand 285889 states and 1035124 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:00,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:00,363 INFO L93 Difference]: Finished difference Result 755844 states and 2714289 transitions. [2021-08-21 12:35:00,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 12:35:00,367 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 12:35:00,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:05,215 INFO L225 Difference]: With dead ends: 755844 [2021-08-21 12:35:05,215 INFO L226 Difference]: Without dead ends: 748944 [2021-08-21 12:35:05,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1640.6ms TimeCoverageRelationStatistics Valid=659, Invalid=1993, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 12:35:07,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748944 states. [2021-08-21 12:35:28,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748944 to 430758. [2021-08-21 12:35:29,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430758 states, 430757 states have (on average 3.623825033603633) internal successors, (1560988), 430757 states have internal predecessors, (1560988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430758 states to 430758 states and 1560988 transitions. [2021-08-21 12:35:34,277 INFO L78 Accepts]: Start accepts. Automaton has 430758 states and 1560988 transitions. Word has length 75 [2021-08-21 12:35:34,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:34,277 INFO L470 AbstractCegarLoop]: Abstraction has 430758 states and 1560988 transitions. [2021-08-21 12:35:34,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:34,277 INFO L276 IsEmpty]: Start isEmpty. Operand 430758 states and 1560988 transitions. [2021-08-21 12:35:36,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 12:35:36,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:36,806 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:36,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-21 12:35:36,806 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:35:36,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:36,824 INFO L82 PathProgramCache]: Analyzing trace with hash -287539730, now seen corresponding path program 24 times [2021-08-21 12:35:36,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:36,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322109775] [2021-08-21 12:35:36,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:36,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:36,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:36,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322109775] [2021-08-21 12:35:36,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322109775] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:35:36,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:35:36,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:35:36,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372018998] [2021-08-21 12:35:36,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:35:36,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:36,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:35:36,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:35:36,854 INFO L87 Difference]: Start difference. First operand 430758 states and 1560988 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)